Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1 | /* |
| 2 | / Author: Sam Rushing <rushing@nightmare.com> |
Andrew M. Kuchling | 10f9c07 | 2001-11-05 21:25:42 +0000 | [diff] [blame] | 3 | / Hacked for Unix by AMK |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 4 | / $Id$ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 5 | |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 6 | / Modified to support mmap with offset - to map a 'window' of a file |
| 7 | / Author: Yotam Medini yotamm@mellanox.co.il |
| 8 | / |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 9 | / mmapmodule.cpp -- map a view of a file into memory |
| 10 | / |
| 11 | / todo: need permission flags, perhaps a 'chsize' analog |
| 12 | / not all functions check range yet!!! |
| 13 | / |
| 14 | / |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 15 | / This version of mmapmodule.c has been changed significantly |
| 16 | / from the original mmapfile.c on which it was based. |
| 17 | / The original version of mmapfile is maintained by Sam at |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 18 | / ftp://squirl.nightmare.com/pub/python/python-ext. |
| 19 | */ |
| 20 | |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 21 | #define PY_SSIZE_T_CLEAN |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 22 | #include <Python.h> |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 23 | #include "structmember.h" |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 24 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 25 | #ifndef MS_WINDOWS |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 26 | #define UNIX |
Benjamin Peterson | f6b5cad | 2015-08-02 12:15:30 -0700 | [diff] [blame] | 27 | # ifdef HAVE_FCNTL_H |
Victor Stinner | a6cd0cf | 2011-05-02 01:05:37 +0200 | [diff] [blame] | 28 | # include <fcntl.h> |
Benjamin Peterson | f6b5cad | 2015-08-02 12:15:30 -0700 | [diff] [blame] | 29 | # endif /* HAVE_FCNTL_H */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 30 | #endif |
| 31 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 32 | #ifdef MS_WINDOWS |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 33 | #include <windows.h> |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 34 | static int |
| 35 | my_getpagesize(void) |
| 36 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 37 | SYSTEM_INFO si; |
| 38 | GetSystemInfo(&si); |
| 39 | return si.dwPageSize; |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 40 | } |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 41 | |
| 42 | static int |
| 43 | my_getallocationgranularity (void) |
| 44 | { |
| 45 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 46 | SYSTEM_INFO si; |
| 47 | GetSystemInfo(&si); |
| 48 | return si.dwAllocationGranularity; |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 51 | #endif |
| 52 | |
| 53 | #ifdef UNIX |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 54 | #include <sys/mman.h> |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 55 | #include <sys/stat.h> |
Guido van Rossum | 4b36e6b | 2000-09-25 13:16:15 +0000 | [diff] [blame] | 56 | |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 57 | #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) |
| 58 | static int |
| 59 | my_getpagesize(void) |
| 60 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 61 | return sysconf(_SC_PAGESIZE); |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 62 | } |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 63 | |
| 64 | #define my_getallocationgranularity my_getpagesize |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 65 | #else |
| 66 | #define my_getpagesize getpagesize |
| 67 | #endif |
| 68 | |
Guido van Rossum | 4b36e6b | 2000-09-25 13:16:15 +0000 | [diff] [blame] | 69 | #endif /* UNIX */ |
| 70 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 71 | #include <string.h> |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 72 | |
| 73 | #ifdef HAVE_SYS_TYPES_H |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 74 | #include <sys/types.h> |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 75 | #endif /* HAVE_SYS_TYPES_H */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 76 | |
Neal Norwitz | 3eaf2b5 | 2006-02-16 08:08:54 +0000 | [diff] [blame] | 77 | /* Prefer MAP_ANONYMOUS since MAP_ANON is deprecated according to man page. */ |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 78 | #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) |
| 79 | # define MAP_ANONYMOUS MAP_ANON |
| 80 | #endif |
| 81 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 82 | typedef enum |
| 83 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 84 | ACCESS_DEFAULT, |
| 85 | ACCESS_READ, |
| 86 | ACCESS_WRITE, |
| 87 | ACCESS_COPY |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 88 | } access_mode; |
| 89 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 90 | typedef struct { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 91 | PyObject_HEAD |
| 92 | char * data; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 93 | Py_ssize_t size; |
| 94 | Py_ssize_t pos; /* relative to offset */ |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 95 | #ifdef MS_WINDOWS |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 96 | long long offset; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 97 | #else |
| 98 | off_t offset; |
| 99 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 100 | int exports; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 101 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 102 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 103 | HANDLE map_handle; |
| 104 | HANDLE file_handle; |
| 105 | char * tagname; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 106 | #endif |
| 107 | |
| 108 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 109 | int fd; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 110 | #endif |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 111 | |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 112 | PyObject *weakreflist; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 113 | access_mode access; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 114 | } mmap_object; |
| 115 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 116 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 117 | static void |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 118 | mmap_object_dealloc(mmap_object *m_obj) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 119 | { |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 120 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 121 | if (m_obj->data != NULL) |
| 122 | UnmapViewOfFile (m_obj->data); |
| 123 | if (m_obj->map_handle != NULL) |
| 124 | CloseHandle (m_obj->map_handle); |
| 125 | if (m_obj->file_handle != INVALID_HANDLE_VALUE) |
| 126 | CloseHandle (m_obj->file_handle); |
| 127 | if (m_obj->tagname) |
| 128 | PyMem_Free(m_obj->tagname); |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 129 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 130 | |
| 131 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 132 | if (m_obj->fd >= 0) |
| 133 | (void) close(m_obj->fd); |
| 134 | if (m_obj->data!=NULL) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 135 | munmap(m_obj->data, m_obj->size); |
| 136 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 137 | #endif /* UNIX */ |
| 138 | |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 139 | if (m_obj->weakreflist != NULL) |
| 140 | PyObject_ClearWeakRefs((PyObject *) m_obj); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 141 | Py_TYPE(m_obj)->tp_free((PyObject*)m_obj); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | static PyObject * |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 145 | mmap_close_method(mmap_object *self, PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 146 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 147 | if (self->exports > 0) { |
| 148 | PyErr_SetString(PyExc_BufferError, "cannot close "\ |
| 149 | "exported pointers exist"); |
| 150 | return NULL; |
| 151 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 152 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 153 | /* For each resource we maintain, we need to check |
| 154 | the value is valid, and if so, free the resource |
| 155 | and set the member value to an invalid value so |
| 156 | the dealloc does not attempt to resource clearing |
| 157 | again. |
| 158 | TODO - should we check for errors in the close operations??? |
| 159 | */ |
| 160 | if (self->data != NULL) { |
| 161 | UnmapViewOfFile(self->data); |
| 162 | self->data = NULL; |
| 163 | } |
| 164 | if (self->map_handle != NULL) { |
| 165 | CloseHandle(self->map_handle); |
| 166 | self->map_handle = NULL; |
| 167 | } |
| 168 | if (self->file_handle != INVALID_HANDLE_VALUE) { |
| 169 | CloseHandle(self->file_handle); |
| 170 | self->file_handle = INVALID_HANDLE_VALUE; |
| 171 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 172 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 173 | |
| 174 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 175 | if (0 <= self->fd) |
| 176 | (void) close(self->fd); |
| 177 | self->fd = -1; |
| 178 | if (self->data != NULL) { |
| 179 | munmap(self->data, self->size); |
| 180 | self->data = NULL; |
| 181 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 182 | #endif |
| 183 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 184 | Py_INCREF(Py_None); |
| 185 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 186 | } |
| 187 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 188 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 189 | #define CHECK_VALID(err) \ |
| 190 | do { \ |
| 191 | if (self->map_handle == NULL) { \ |
| 192 | PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \ |
| 193 | return err; \ |
| 194 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 195 | } while (0) |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 196 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 197 | |
| 198 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 199 | #define CHECK_VALID(err) \ |
| 200 | do { \ |
| 201 | if (self->data == NULL) { \ |
| 202 | PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \ |
| 203 | return err; \ |
| 204 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 205 | } while (0) |
| 206 | #endif /* UNIX */ |
| 207 | |
| 208 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 209 | mmap_read_byte_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 210 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 211 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 212 | CHECK_VALID(NULL); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 213 | if (self->pos >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 214 | PyErr_SetString(PyExc_ValueError, "read byte out of range"); |
| 215 | return NULL; |
| 216 | } |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 217 | return PyLong_FromLong((unsigned char)self->data[self->pos++]); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 221 | mmap_read_line_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 222 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 223 | { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 224 | Py_ssize_t remaining; |
| 225 | char *start, *eol; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 226 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 227 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 228 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 229 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 230 | remaining = (self->pos < self->size) ? self->size - self->pos : 0; |
| 231 | if (!remaining) |
| 232 | return PyBytes_FromString(""); |
| 233 | start = self->data + self->pos; |
| 234 | eol = memchr(start, '\n', remaining); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 235 | if (!eol) |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 236 | eol = self->data + self->size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 237 | else |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 238 | ++eol; /* advance past newline */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 239 | result = PyBytes_FromStringAndSize(start, (eol - start)); |
| 240 | self->pos += (eol - start); |
| 241 | return result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Charles-François Natali | 4dd453c | 2011-06-08 19:18:14 +0200 | [diff] [blame] | 244 | /* Basically the "n" format code with the ability to turn None into -1. */ |
| 245 | static int |
| 246 | mmap_convert_ssize_t(PyObject *obj, void *result) { |
| 247 | Py_ssize_t limit; |
| 248 | if (obj == Py_None) { |
| 249 | limit = -1; |
| 250 | } |
| 251 | else if (PyNumber_Check(obj)) { |
| 252 | limit = PyNumber_AsSsize_t(obj, PyExc_OverflowError); |
| 253 | if (limit == -1 && PyErr_Occurred()) |
| 254 | return 0; |
| 255 | } |
| 256 | else { |
| 257 | PyErr_Format(PyExc_TypeError, |
| 258 | "integer argument expected, got '%.200s'", |
| 259 | Py_TYPE(obj)->tp_name); |
| 260 | return 0; |
| 261 | } |
| 262 | *((Py_ssize_t *)result) = limit; |
| 263 | return 1; |
| 264 | } |
| 265 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 266 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 267 | mmap_read_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 268 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 269 | { |
Benjamin Peterson | 8f1cdc6 | 2016-10-05 23:32:09 -0700 | [diff] [blame] | 270 | Py_ssize_t num_bytes = PY_SSIZE_T_MAX, remaining; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 271 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 272 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 273 | CHECK_VALID(NULL); |
Charles-François Natali | 4dd453c | 2011-06-08 19:18:14 +0200 | [diff] [blame] | 274 | if (!PyArg_ParseTuple(args, "|O&:read", mmap_convert_ssize_t, &num_bytes)) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 275 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 276 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 277 | /* silently 'adjust' out-of-range requests */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 278 | remaining = (self->pos < self->size) ? self->size - self->pos : 0; |
| 279 | if (num_bytes < 0 || num_bytes > remaining) |
| 280 | num_bytes = remaining; |
| 281 | result = PyBytes_FromStringAndSize(&self->data[self->pos], num_bytes); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 282 | self->pos += num_bytes; |
| 283 | return result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | static PyObject * |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 287 | mmap_gfind(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 288 | PyObject *args, |
| 289 | int reverse) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 290 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 291 | Py_ssize_t start = self->pos; |
| 292 | Py_ssize_t end = self->size; |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 293 | Py_buffer view; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 294 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 295 | CHECK_VALID(NULL); |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 296 | if (!PyArg_ParseTuple(args, reverse ? "y*|nn:rfind" : "y*|nn:find", |
| 297 | &view, &start, &end)) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 298 | return NULL; |
| 299 | } else { |
| 300 | const char *p, *start_p, *end_p; |
| 301 | int sign = reverse ? -1 : 1; |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 302 | const char *needle = view.buf; |
| 303 | Py_ssize_t len = view.len; |
Greg Stein | 834f4dd | 2001-05-14 09:32:26 +0000 | [diff] [blame] | 304 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 305 | if (start < 0) |
| 306 | start += self->size; |
| 307 | if (start < 0) |
| 308 | start = 0; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 309 | else if (start > self->size) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 310 | start = self->size; |
Greg Stein | 834f4dd | 2001-05-14 09:32:26 +0000 | [diff] [blame] | 311 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 312 | if (end < 0) |
| 313 | end += self->size; |
| 314 | if (end < 0) |
| 315 | end = 0; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 316 | else if (end > self->size) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 317 | end = self->size; |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 318 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 319 | start_p = self->data + start; |
| 320 | end_p = self->data + end; |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 321 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 322 | for (p = (reverse ? end_p - len : start_p); |
| 323 | (p >= start_p) && (p + len <= end_p); p += sign) { |
| 324 | Py_ssize_t i; |
| 325 | for (i = 0; i < len && needle[i] == p[i]; ++i) |
| 326 | /* nothing */; |
| 327 | if (i == len) { |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 328 | PyBuffer_Release(&view); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 329 | return PyLong_FromSsize_t(p - self->data); |
| 330 | } |
| 331 | } |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 332 | PyBuffer_Release(&view); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 333 | return PyLong_FromLong(-1); |
| 334 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 335 | } |
| 336 | |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 337 | static PyObject * |
| 338 | mmap_find_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 339 | PyObject *args) |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 340 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 341 | return mmap_gfind(self, args, 0); |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static PyObject * |
| 345 | mmap_rfind_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 346 | PyObject *args) |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 347 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 348 | return mmap_gfind(self, args, 1); |
Georg Brandl | fceab5a | 2008-01-19 20:08:23 +0000 | [diff] [blame] | 349 | } |
| 350 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 351 | static int |
Sean Reifscheider | 54cf12b | 2007-09-17 17:55:36 +0000 | [diff] [blame] | 352 | is_writable(mmap_object *self) |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 353 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 354 | if (self->access != ACCESS_READ) |
| 355 | return 1; |
| 356 | PyErr_Format(PyExc_TypeError, "mmap can't modify a readonly memory map."); |
| 357 | return 0; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 358 | } |
| 359 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 360 | static int |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 361 | is_resizeable(mmap_object *self) |
| 362 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 363 | if (self->exports > 0) { |
| 364 | PyErr_SetString(PyExc_BufferError, |
| 365 | "mmap can't resize with extant buffers exported."); |
| 366 | return 0; |
| 367 | } |
| 368 | if ((self->access == ACCESS_WRITE) || (self->access == ACCESS_DEFAULT)) |
| 369 | return 1; |
| 370 | PyErr_Format(PyExc_TypeError, |
| 371 | "mmap can't resize a readonly or copy-on-write memory map."); |
| 372 | return 0; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 376 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 377 | mmap_write_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 378 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 379 | { |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 380 | Py_buffer data; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 381 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 382 | CHECK_VALID(NULL); |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 383 | if (!PyArg_ParseTuple(args, "y*:write", &data)) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 384 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 385 | |
Benjamin Peterson | 3776836 | 2016-10-05 23:29:07 -0700 | [diff] [blame] | 386 | if (!is_writable(self)) { |
| 387 | PyBuffer_Release(&data); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 388 | return NULL; |
Benjamin Peterson | 3776836 | 2016-10-05 23:29:07 -0700 | [diff] [blame] | 389 | } |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 390 | |
| 391 | if (self->pos > self->size || self->size - self->pos < data.len) { |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 392 | PyBuffer_Release(&data); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 393 | PyErr_SetString(PyExc_ValueError, "data out of range"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 394 | return NULL; |
| 395 | } |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 396 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 397 | memcpy(&self->data[self->pos], data.buf, data.len); |
| 398 | self->pos += data.len; |
Serhiy Storchaka | 8490f5a | 2015-03-20 09:00:36 +0200 | [diff] [blame] | 399 | PyBuffer_Release(&data); |
Benjamin Peterson | 87845bc | 2016-10-05 22:54:19 -0700 | [diff] [blame] | 400 | return PyLong_FromSsize_t(data.len); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 404 | mmap_write_byte_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 405 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 406 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 407 | char value; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 408 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 409 | CHECK_VALID(NULL); |
| 410 | if (!PyArg_ParseTuple(args, "b:write_byte", &value)) |
| 411 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 412 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 413 | if (!is_writable(self)) |
| 414 | return NULL; |
Hirokazu Yamamoto | 39c6dea | 2009-02-28 10:56:50 +0000 | [diff] [blame] | 415 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 416 | if (self->pos < self->size) { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 417 | self->data[self->pos++] = value; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 418 | Py_INCREF(Py_None); |
| 419 | return Py_None; |
| 420 | } |
| 421 | else { |
| 422 | PyErr_SetString(PyExc_ValueError, "write byte out of range"); |
| 423 | return NULL; |
| 424 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 425 | } |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 426 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 427 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 428 | mmap_size_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 429 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 430 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 431 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 432 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 433 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 434 | if (self->file_handle != INVALID_HANDLE_VALUE) { |
| 435 | DWORD low,high; |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 436 | long long size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 437 | low = GetFileSize(self->file_handle, &high); |
| 438 | if (low == INVALID_FILE_SIZE) { |
| 439 | /* It might be that the function appears to have failed, |
| 440 | when indeed its size equals INVALID_FILE_SIZE */ |
| 441 | DWORD error = GetLastError(); |
| 442 | if (error != NO_ERROR) |
| 443 | return PyErr_SetFromWindowsErr(error); |
| 444 | } |
| 445 | if (!high && low < LONG_MAX) |
| 446 | return PyLong_FromLong((long)low); |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 447 | size = (((long long)high)<<32) + low; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 448 | return PyLong_FromLongLong(size); |
| 449 | } else { |
| 450 | return PyLong_FromSsize_t(self->size); |
| 451 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 452 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 453 | |
| 454 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 455 | { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 456 | struct _Py_stat_struct status; |
| 457 | if (_Py_fstat(self->fd, &status) == -1) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 458 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 459 | #ifdef HAVE_LARGEFILE_SUPPORT |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 460 | return PyLong_FromLongLong(status.st_size); |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 461 | #else |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 462 | return PyLong_FromLong(status.st_size); |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 463 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 464 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 465 | #endif /* UNIX */ |
| 466 | } |
| 467 | |
| 468 | /* This assumes that you want the entire file mapped, |
| 469 | / and when recreating the map will make the new file |
| 470 | / have the new size |
| 471 | / |
| 472 | / Is this really necessary? This could easily be done |
| 473 | / from python by just closing and re-opening with the |
| 474 | / new size? |
| 475 | */ |
| 476 | |
| 477 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 478 | mmap_resize_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 479 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 480 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 481 | Py_ssize_t new_size; |
| 482 | CHECK_VALID(NULL); |
| 483 | if (!PyArg_ParseTuple(args, "n:resize", &new_size) || |
| 484 | !is_resizeable(self)) { |
| 485 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 486 | } |
| 487 | if (new_size < 0 || PY_SSIZE_T_MAX - new_size < self->offset) { |
| 488 | PyErr_SetString(PyExc_ValueError, "new size out of range"); |
| 489 | return NULL; |
| 490 | } |
| 491 | |
| 492 | { |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 493 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 494 | DWORD dwErrCode = 0; |
| 495 | DWORD off_hi, off_lo, newSizeLow, newSizeHigh; |
| 496 | /* First, unmap the file view */ |
| 497 | UnmapViewOfFile(self->data); |
| 498 | self->data = NULL; |
| 499 | /* Close the mapping object */ |
| 500 | CloseHandle(self->map_handle); |
| 501 | self->map_handle = NULL; |
| 502 | /* Move to the desired EOF position */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 503 | newSizeHigh = (DWORD)((self->offset + new_size) >> 32); |
| 504 | newSizeLow = (DWORD)((self->offset + new_size) & 0xFFFFFFFF); |
| 505 | off_hi = (DWORD)(self->offset >> 32); |
| 506 | off_lo = (DWORD)(self->offset & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 507 | SetFilePointer(self->file_handle, |
| 508 | newSizeLow, &newSizeHigh, FILE_BEGIN); |
| 509 | /* Change the size of the file */ |
| 510 | SetEndOfFile(self->file_handle); |
| 511 | /* Create another mapping object and remap the file view */ |
| 512 | self->map_handle = CreateFileMapping( |
| 513 | self->file_handle, |
| 514 | NULL, |
| 515 | PAGE_READWRITE, |
| 516 | 0, |
| 517 | 0, |
| 518 | self->tagname); |
| 519 | if (self->map_handle != NULL) { |
| 520 | self->data = (char *) MapViewOfFile(self->map_handle, |
| 521 | FILE_MAP_WRITE, |
| 522 | off_hi, |
| 523 | off_lo, |
| 524 | new_size); |
| 525 | if (self->data != NULL) { |
| 526 | self->size = new_size; |
| 527 | Py_INCREF(Py_None); |
| 528 | return Py_None; |
| 529 | } else { |
| 530 | dwErrCode = GetLastError(); |
| 531 | CloseHandle(self->map_handle); |
| 532 | self->map_handle = NULL; |
| 533 | } |
| 534 | } else { |
| 535 | dwErrCode = GetLastError(); |
| 536 | } |
| 537 | PyErr_SetFromWindowsErr(dwErrCode); |
| 538 | return NULL; |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 539 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 540 | |
| 541 | #ifdef UNIX |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 542 | #ifndef HAVE_MREMAP |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 543 | PyErr_SetString(PyExc_SystemError, |
| 544 | "mmap: resizing not available--no mremap()"); |
| 545 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 546 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 547 | void *newmap; |
Armin Rigo | 335ffe8 | 2005-09-20 19:04:02 +0000 | [diff] [blame] | 548 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 549 | if (self->fd != -1 && ftruncate(self->fd, self->offset + new_size) == -1) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 550 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 551 | return NULL; |
| 552 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 553 | |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 554 | #ifdef MREMAP_MAYMOVE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 555 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 556 | #else |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 557 | #if defined(__NetBSD__) |
| 558 | newmap = mremap(self->data, self->size, self->data, new_size, 0); |
| 559 | #else |
| 560 | newmap = mremap(self->data, self->size, new_size, 0); |
| 561 | #endif /* __NetBSD__ */ |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 562 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 563 | if (newmap == (void *)-1) |
| 564 | { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 565 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 566 | return NULL; |
| 567 | } |
| 568 | self->data = newmap; |
| 569 | self->size = new_size; |
| 570 | Py_INCREF(Py_None); |
| 571 | return Py_None; |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 572 | #endif /* HAVE_MREMAP */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 573 | #endif /* UNIX */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 574 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | static PyObject * |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 578 | mmap_tell_method(mmap_object *self, PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 579 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 580 | CHECK_VALID(NULL); |
| 581 | return PyLong_FromSize_t(self->pos); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 585 | mmap_flush_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 586 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 587 | Py_ssize_t offset = 0; |
| 588 | Py_ssize_t size = self->size; |
| 589 | CHECK_VALID(NULL); |
| 590 | if (!PyArg_ParseTuple(args, "|nn:flush", &offset, &size)) |
| 591 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 592 | if (size < 0 || offset < 0 || self->size - offset < size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 593 | PyErr_SetString(PyExc_ValueError, "flush values out of range"); |
| 594 | return NULL; |
| 595 | } |
R. David Murray | e194dd6 | 2010-10-18 01:14:06 +0000 | [diff] [blame] | 596 | |
| 597 | if (self->access == ACCESS_READ || self->access == ACCESS_COPY) |
| 598 | return PyLong_FromLong(0); |
| 599 | |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 600 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 601 | return PyLong_FromLong((long) FlushViewOfFile(self->data+offset, size)); |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 602 | #elif defined(UNIX) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 603 | /* XXX semantics of return value? */ |
| 604 | /* XXX flags for msync? */ |
| 605 | if (-1 == msync(self->data + offset, size, MS_SYNC)) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 606 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 607 | return NULL; |
| 608 | } |
| 609 | return PyLong_FromLong(0); |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 610 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 611 | PyErr_SetString(PyExc_ValueError, "flush not supported on this system"); |
| 612 | return NULL; |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 613 | #endif |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 617 | mmap_seek_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 618 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 619 | Py_ssize_t dist; |
| 620 | int how=0; |
| 621 | CHECK_VALID(NULL); |
| 622 | if (!PyArg_ParseTuple(args, "n|i:seek", &dist, &how)) |
| 623 | return NULL; |
| 624 | else { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 625 | Py_ssize_t where; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 626 | switch (how) { |
| 627 | case 0: /* relative to start */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 628 | where = dist; |
| 629 | break; |
| 630 | case 1: /* relative to current position */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 631 | if (PY_SSIZE_T_MAX - self->pos < dist) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 632 | goto onoutofrange; |
| 633 | where = self->pos + dist; |
| 634 | break; |
| 635 | case 2: /* relative to end */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 636 | if (PY_SSIZE_T_MAX - self->size < dist) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 637 | goto onoutofrange; |
| 638 | where = self->size + dist; |
| 639 | break; |
| 640 | default: |
| 641 | PyErr_SetString(PyExc_ValueError, "unknown seek type"); |
| 642 | return NULL; |
| 643 | } |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 644 | if (where > self->size || where < 0) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 645 | goto onoutofrange; |
| 646 | self->pos = where; |
| 647 | Py_INCREF(Py_None); |
| 648 | return Py_None; |
| 649 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 650 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 651 | onoutofrange: |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 652 | PyErr_SetString(PyExc_ValueError, "seek out of range"); |
| 653 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 657 | mmap_move_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 658 | { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 659 | Py_ssize_t dest, src, cnt; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 660 | CHECK_VALID(NULL); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 661 | if (!PyArg_ParseTuple(args, "nnn:move", &dest, &src, &cnt) || |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 662 | !is_writable(self)) { |
| 663 | return NULL; |
| 664 | } else { |
| 665 | /* bounds check the values */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 666 | if (dest < 0 || src < 0 || cnt < 0) |
| 667 | goto bounds; |
| 668 | if (self->size - dest < cnt || self->size - src < cnt) |
| 669 | goto bounds; |
| 670 | |
| 671 | memmove(&self->data[dest], &self->data[src], cnt); |
| 672 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 673 | Py_INCREF(Py_None); |
| 674 | return Py_None; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 675 | |
| 676 | bounds: |
| 677 | PyErr_SetString(PyExc_ValueError, |
| 678 | "source, destination, or count out of range"); |
| 679 | return NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 680 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 681 | } |
| 682 | |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 683 | static PyObject * |
| 684 | mmap_closed_get(mmap_object *self) |
| 685 | { |
| 686 | #ifdef MS_WINDOWS |
| 687 | return PyBool_FromLong(self->map_handle == NULL ? 1 : 0); |
| 688 | #elif defined(UNIX) |
| 689 | return PyBool_FromLong(self->data == NULL ? 1 : 0); |
| 690 | #endif |
| 691 | } |
| 692 | |
| 693 | static PyObject * |
| 694 | mmap__enter__method(mmap_object *self, PyObject *args) |
| 695 | { |
| 696 | CHECK_VALID(NULL); |
| 697 | |
| 698 | Py_INCREF(self); |
| 699 | return (PyObject *)self; |
| 700 | } |
| 701 | |
| 702 | static PyObject * |
| 703 | mmap__exit__method(PyObject *self, PyObject *args) |
| 704 | { |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 705 | _Py_IDENTIFIER(close); |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 706 | |
| 707 | return _PyObject_CallMethodId(self, &PyId_close, NULL); |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 708 | } |
| 709 | |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 710 | #ifdef MS_WINDOWS |
| 711 | static PyObject * |
| 712 | mmap__sizeof__method(mmap_object *self, void *unused) |
| 713 | { |
| 714 | Py_ssize_t res; |
| 715 | |
Serhiy Storchaka | 5c4064e | 2015-12-19 20:05:25 +0200 | [diff] [blame] | 716 | res = _PyObject_SIZE(Py_TYPE(self)); |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 717 | if (self->tagname) |
| 718 | res += strlen(self->tagname) + 1; |
| 719 | return PyLong_FromSsize_t(res); |
| 720 | } |
| 721 | #endif |
| 722 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 723 | static struct PyMethodDef mmap_object_methods[] = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 724 | {"close", (PyCFunction) mmap_close_method, METH_NOARGS}, |
| 725 | {"find", (PyCFunction) mmap_find_method, METH_VARARGS}, |
| 726 | {"rfind", (PyCFunction) mmap_rfind_method, METH_VARARGS}, |
| 727 | {"flush", (PyCFunction) mmap_flush_method, METH_VARARGS}, |
| 728 | {"move", (PyCFunction) mmap_move_method, METH_VARARGS}, |
| 729 | {"read", (PyCFunction) mmap_read_method, METH_VARARGS}, |
| 730 | {"read_byte", (PyCFunction) mmap_read_byte_method, METH_NOARGS}, |
| 731 | {"readline", (PyCFunction) mmap_read_line_method, METH_NOARGS}, |
| 732 | {"resize", (PyCFunction) mmap_resize_method, METH_VARARGS}, |
| 733 | {"seek", (PyCFunction) mmap_seek_method, METH_VARARGS}, |
| 734 | {"size", (PyCFunction) mmap_size_method, METH_NOARGS}, |
| 735 | {"tell", (PyCFunction) mmap_tell_method, METH_NOARGS}, |
| 736 | {"write", (PyCFunction) mmap_write_method, METH_VARARGS}, |
| 737 | {"write_byte", (PyCFunction) mmap_write_byte_method, METH_VARARGS}, |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 738 | {"__enter__", (PyCFunction) mmap__enter__method, METH_NOARGS}, |
| 739 | {"__exit__", (PyCFunction) mmap__exit__method, METH_VARARGS}, |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 740 | #ifdef MS_WINDOWS |
| 741 | {"__sizeof__", (PyCFunction) mmap__sizeof__method, METH_NOARGS}, |
| 742 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 743 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 744 | }; |
| 745 | |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 746 | static PyGetSetDef mmap_object_getset[] = { |
| 747 | {"closed", (getter) mmap_closed_get, NULL, NULL}, |
| 748 | {NULL} |
| 749 | }; |
| 750 | |
| 751 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 752 | /* Functions for treating an mmap'ed file as a buffer */ |
| 753 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 754 | static int |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 755 | mmap_buffer_getbuf(mmap_object *self, Py_buffer *view, int flags) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 756 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 757 | CHECK_VALID(-1); |
| 758 | if (PyBuffer_FillInfo(view, (PyObject*)self, self->data, self->size, |
| 759 | (self->access == ACCESS_READ), flags) < 0) |
| 760 | return -1; |
| 761 | self->exports++; |
| 762 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 763 | } |
| 764 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 765 | static void |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 766 | mmap_buffer_releasebuf(mmap_object *self, Py_buffer *view) |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 767 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 768 | self->exports--; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 769 | } |
| 770 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 771 | static Py_ssize_t |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 772 | mmap_length(mmap_object *self) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 773 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 774 | CHECK_VALID(-1); |
| 775 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 776 | } |
| 777 | |
| 778 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 779 | mmap_item(mmap_object *self, Py_ssize_t i) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 780 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 781 | CHECK_VALID(NULL); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 782 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 783 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 784 | return NULL; |
| 785 | } |
| 786 | return PyBytes_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | static PyObject * |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 790 | mmap_subscript(mmap_object *self, PyObject *item) |
| 791 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 792 | CHECK_VALID(NULL); |
| 793 | if (PyIndex_Check(item)) { |
| 794 | Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); |
| 795 | if (i == -1 && PyErr_Occurred()) |
| 796 | return NULL; |
| 797 | if (i < 0) |
| 798 | i += self->size; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 799 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 800 | PyErr_SetString(PyExc_IndexError, |
| 801 | "mmap index out of range"); |
| 802 | return NULL; |
| 803 | } |
| 804 | return PyLong_FromLong(Py_CHARMASK(self->data[i])); |
| 805 | } |
| 806 | else if (PySlice_Check(item)) { |
| 807 | Py_ssize_t start, stop, step, slicelen; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 808 | |
Martin v. Löwis | 4d0d471 | 2010-12-03 20:14:31 +0000 | [diff] [blame] | 809 | if (PySlice_GetIndicesEx(item, self->size, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 810 | &start, &stop, &step, &slicelen) < 0) { |
| 811 | return NULL; |
| 812 | } |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 813 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 814 | if (slicelen <= 0) |
| 815 | return PyBytes_FromStringAndSize("", 0); |
| 816 | else if (step == 1) |
| 817 | return PyBytes_FromStringAndSize(self->data + start, |
| 818 | slicelen); |
| 819 | else { |
| 820 | char *result_buf = (char *)PyMem_Malloc(slicelen); |
| 821 | Py_ssize_t cur, i; |
| 822 | PyObject *result; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 823 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 824 | if (result_buf == NULL) |
| 825 | return PyErr_NoMemory(); |
| 826 | for (cur = start, i = 0; i < slicelen; |
| 827 | cur += step, i++) { |
| 828 | result_buf[i] = self->data[cur]; |
| 829 | } |
| 830 | result = PyBytes_FromStringAndSize(result_buf, |
| 831 | slicelen); |
| 832 | PyMem_Free(result_buf); |
| 833 | return result; |
| 834 | } |
| 835 | } |
| 836 | else { |
| 837 | PyErr_SetString(PyExc_TypeError, |
| 838 | "mmap indices must be integers"); |
| 839 | return NULL; |
| 840 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 841 | } |
| 842 | |
| 843 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 844 | mmap_concat(mmap_object *self, PyObject *bb) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 845 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 846 | CHECK_VALID(NULL); |
| 847 | PyErr_SetString(PyExc_SystemError, |
| 848 | "mmaps don't support concatenation"); |
| 849 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 853 | mmap_repeat(mmap_object *self, Py_ssize_t n) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 854 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 855 | CHECK_VALID(NULL); |
| 856 | PyErr_SetString(PyExc_SystemError, |
| 857 | "mmaps don't support repeat operation"); |
| 858 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 859 | } |
| 860 | |
| 861 | static int |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 862 | mmap_ass_item(mmap_object *self, Py_ssize_t i, PyObject *v) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 863 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 864 | const char *buf; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 865 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 866 | CHECK_VALID(-1); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 867 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 868 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 869 | return -1; |
| 870 | } |
| 871 | if (v == NULL) { |
| 872 | PyErr_SetString(PyExc_TypeError, |
| 873 | "mmap object doesn't support item deletion"); |
| 874 | return -1; |
| 875 | } |
| 876 | if (! (PyBytes_Check(v) && PyBytes_Size(v)==1) ) { |
| 877 | PyErr_SetString(PyExc_IndexError, |
| 878 | "mmap assignment must be length-1 bytes()"); |
| 879 | return -1; |
| 880 | } |
| 881 | if (!is_writable(self)) |
| 882 | return -1; |
| 883 | buf = PyBytes_AsString(v); |
| 884 | self->data[i] = buf[0]; |
| 885 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 886 | } |
| 887 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 888 | static int |
| 889 | mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value) |
| 890 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 891 | CHECK_VALID(-1); |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 892 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 893 | if (!is_writable(self)) |
| 894 | return -1; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 895 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 896 | if (PyIndex_Check(item)) { |
| 897 | Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); |
| 898 | Py_ssize_t v; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 899 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 900 | if (i == -1 && PyErr_Occurred()) |
| 901 | return -1; |
| 902 | if (i < 0) |
| 903 | i += self->size; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 904 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 905 | PyErr_SetString(PyExc_IndexError, |
| 906 | "mmap index out of range"); |
| 907 | return -1; |
| 908 | } |
| 909 | if (value == NULL) { |
| 910 | PyErr_SetString(PyExc_TypeError, |
| 911 | "mmap doesn't support item deletion"); |
| 912 | return -1; |
| 913 | } |
| 914 | if (!PyIndex_Check(value)) { |
| 915 | PyErr_SetString(PyExc_TypeError, |
| 916 | "mmap item value must be an int"); |
| 917 | return -1; |
| 918 | } |
| 919 | v = PyNumber_AsSsize_t(value, PyExc_TypeError); |
| 920 | if (v == -1 && PyErr_Occurred()) |
| 921 | return -1; |
| 922 | if (v < 0 || v > 255) { |
| 923 | PyErr_SetString(PyExc_ValueError, |
| 924 | "mmap item value must be " |
| 925 | "in range(0, 256)"); |
| 926 | return -1; |
| 927 | } |
Antoine Pitrou | 22e4155 | 2010-08-15 18:07:50 +0000 | [diff] [blame] | 928 | self->data[i] = (char) v; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 929 | return 0; |
| 930 | } |
| 931 | else if (PySlice_Check(item)) { |
| 932 | Py_ssize_t start, stop, step, slicelen; |
| 933 | Py_buffer vbuf; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 934 | |
Martin v. Löwis | 4d0d471 | 2010-12-03 20:14:31 +0000 | [diff] [blame] | 935 | if (PySlice_GetIndicesEx(item, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 936 | self->size, &start, &stop, |
| 937 | &step, &slicelen) < 0) { |
| 938 | return -1; |
| 939 | } |
| 940 | if (value == NULL) { |
| 941 | PyErr_SetString(PyExc_TypeError, |
| 942 | "mmap object doesn't support slice deletion"); |
| 943 | return -1; |
| 944 | } |
| 945 | if (PyObject_GetBuffer(value, &vbuf, PyBUF_SIMPLE) < 0) |
| 946 | return -1; |
| 947 | if (vbuf.len != slicelen) { |
| 948 | PyErr_SetString(PyExc_IndexError, |
| 949 | "mmap slice assignment is wrong size"); |
| 950 | PyBuffer_Release(&vbuf); |
| 951 | return -1; |
| 952 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 953 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 954 | if (slicelen == 0) { |
| 955 | } |
| 956 | else if (step == 1) { |
| 957 | memcpy(self->data + start, vbuf.buf, slicelen); |
| 958 | } |
| 959 | else { |
| 960 | Py_ssize_t cur, i; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 961 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 962 | for (cur = start, i = 0; |
| 963 | i < slicelen; |
| 964 | cur += step, i++) |
| 965 | { |
| 966 | self->data[cur] = ((char *)vbuf.buf)[i]; |
| 967 | } |
| 968 | } |
| 969 | PyBuffer_Release(&vbuf); |
| 970 | return 0; |
| 971 | } |
| 972 | else { |
| 973 | PyErr_SetString(PyExc_TypeError, |
| 974 | "mmap indices must be integer"); |
| 975 | return -1; |
| 976 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 977 | } |
| 978 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 979 | static PySequenceMethods mmap_as_sequence = { |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 980 | (lenfunc)mmap_length, /*sq_length*/ |
| 981 | (binaryfunc)mmap_concat, /*sq_concat*/ |
| 982 | (ssizeargfunc)mmap_repeat, /*sq_repeat*/ |
| 983 | (ssizeargfunc)mmap_item, /*sq_item*/ |
| 984 | 0, /*sq_slice*/ |
| 985 | (ssizeobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 986 | 0, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 987 | }; |
| 988 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 989 | static PyMappingMethods mmap_as_mapping = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 990 | (lenfunc)mmap_length, |
| 991 | (binaryfunc)mmap_subscript, |
| 992 | (objobjargproc)mmap_ass_subscript, |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 993 | }; |
| 994 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 995 | static PyBufferProcs mmap_as_buffer = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 996 | (getbufferproc)mmap_buffer_getbuf, |
| 997 | (releasebufferproc)mmap_buffer_releasebuf, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 998 | }; |
| 999 | |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1000 | static PyObject * |
| 1001 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict); |
| 1002 | |
Christian Heimes | e1c9811 | 2008-01-21 11:20:28 +0000 | [diff] [blame] | 1003 | PyDoc_STRVAR(mmap_doc, |
| 1004 | "Windows: mmap(fileno, length[, tagname[, access[, offset]]])\n\ |
| 1005 | \n\ |
| 1006 | Maps length bytes from the file specified by the file handle fileno,\n\ |
| 1007 | and returns a mmap object. If length is larger than the current size\n\ |
| 1008 | of the file, the file is extended to contain length bytes. If length\n\ |
| 1009 | is 0, the maximum length of the map is the current size of the file,\n\ |
| 1010 | except that if the file is empty Windows raises an exception (you cannot\n\ |
| 1011 | create an empty mapping on Windows).\n\ |
| 1012 | \n\ |
| 1013 | Unix: mmap(fileno, length[, flags[, prot[, access[, offset]]]])\n\ |
| 1014 | \n\ |
| 1015 | Maps length bytes from the file specified by the file descriptor fileno,\n\ |
| 1016 | and returns a mmap object. If length is 0, the maximum length of the map\n\ |
| 1017 | will be the current size of the file when mmap is called.\n\ |
| 1018 | flags specifies the nature of the mapping. MAP_PRIVATE creates a\n\ |
| 1019 | private copy-on-write mapping, so changes to the contents of the mmap\n\ |
Benjamin Peterson | c4fe6f3 | 2008-08-19 18:57:56 +0000 | [diff] [blame] | 1020 | object will be private to this process, and MAP_SHARED creates a mapping\n\ |
Christian Heimes | e1c9811 | 2008-01-21 11:20:28 +0000 | [diff] [blame] | 1021 | that's shared with all other processes mapping the same areas of the file.\n\ |
| 1022 | The default value is MAP_SHARED.\n\ |
| 1023 | \n\ |
| 1024 | To map anonymous memory, pass -1 as the fileno (both versions)."); |
| 1025 | |
| 1026 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1027 | static PyTypeObject mmap_object_type = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1028 | PyVarObject_HEAD_INIT(NULL, 0) |
| 1029 | "mmap.mmap", /* tp_name */ |
| 1030 | sizeof(mmap_object), /* tp_size */ |
| 1031 | 0, /* tp_itemsize */ |
| 1032 | /* methods */ |
| 1033 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 1034 | 0, /* tp_print */ |
| 1035 | 0, /* tp_getattr */ |
| 1036 | 0, /* tp_setattr */ |
| 1037 | 0, /* tp_reserved */ |
| 1038 | 0, /* tp_repr */ |
| 1039 | 0, /* tp_as_number */ |
| 1040 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 1041 | &mmap_as_mapping, /*tp_as_mapping*/ |
| 1042 | 0, /*tp_hash*/ |
| 1043 | 0, /*tp_call*/ |
| 1044 | 0, /*tp_str*/ |
| 1045 | PyObject_GenericGetAttr, /*tp_getattro*/ |
| 1046 | 0, /*tp_setattro*/ |
| 1047 | &mmap_as_buffer, /*tp_as_buffer*/ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1048 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1049 | mmap_doc, /*tp_doc*/ |
| 1050 | 0, /* tp_traverse */ |
| 1051 | 0, /* tp_clear */ |
| 1052 | 0, /* tp_richcompare */ |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1053 | offsetof(mmap_object, weakreflist), /* tp_weaklistoffset */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1054 | 0, /* tp_iter */ |
| 1055 | 0, /* tp_iternext */ |
| 1056 | mmap_object_methods, /* tp_methods */ |
| 1057 | 0, /* tp_members */ |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 1058 | mmap_object_getset, /* tp_getset */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1059 | 0, /* tp_base */ |
| 1060 | 0, /* tp_dict */ |
| 1061 | 0, /* tp_descr_get */ |
| 1062 | 0, /* tp_descr_set */ |
| 1063 | 0, /* tp_dictoffset */ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1064 | 0, /* tp_init */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1065 | PyType_GenericAlloc, /* tp_alloc */ |
| 1066 | new_mmap_object, /* tp_new */ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1067 | PyObject_Del, /* tp_free */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1068 | }; |
| 1069 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 1070 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 1071 | #ifdef UNIX |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1072 | #ifdef HAVE_LARGEFILE_SUPPORT |
| 1073 | #define _Py_PARSE_OFF_T "L" |
| 1074 | #else |
| 1075 | #define _Py_PARSE_OFF_T "l" |
| 1076 | #endif |
| 1077 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1078 | static PyObject * |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1079 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1080 | { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1081 | struct _Py_stat_struct status; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1082 | mmap_object *m_obj; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1083 | Py_ssize_t map_size; |
| 1084 | off_t offset = 0; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1085 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
| 1086 | int devzero = -1; |
| 1087 | int access = (int)ACCESS_DEFAULT; |
| 1088 | static char *keywords[] = {"fileno", "length", |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1089 | "flags", "prot", |
| 1090 | "access", "offset", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1091 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1092 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "in|iii" _Py_PARSE_OFF_T, keywords, |
| 1093 | &fd, &map_size, &flags, &prot, |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1094 | &access, &offset)) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1095 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1096 | if (map_size < 0) { |
| 1097 | PyErr_SetString(PyExc_OverflowError, |
| 1098 | "memory mapped length must be postiive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1099 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1100 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1101 | if (offset < 0) { |
| 1102 | PyErr_SetString(PyExc_OverflowError, |
| 1103 | "memory mapped offset must be positive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1104 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1105 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1106 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1107 | if ((access != (int)ACCESS_DEFAULT) && |
| 1108 | ((flags != MAP_SHARED) || (prot != (PROT_WRITE | PROT_READ)))) |
| 1109 | return PyErr_Format(PyExc_ValueError, |
| 1110 | "mmap can't specify both access and flags, prot."); |
| 1111 | switch ((access_mode)access) { |
| 1112 | case ACCESS_READ: |
| 1113 | flags = MAP_SHARED; |
| 1114 | prot = PROT_READ; |
| 1115 | break; |
| 1116 | case ACCESS_WRITE: |
| 1117 | flags = MAP_SHARED; |
| 1118 | prot = PROT_READ | PROT_WRITE; |
| 1119 | break; |
| 1120 | case ACCESS_COPY: |
| 1121 | flags = MAP_PRIVATE; |
| 1122 | prot = PROT_READ | PROT_WRITE; |
| 1123 | break; |
| 1124 | case ACCESS_DEFAULT: |
Antoine Pitrou | 16a0a0b | 2011-03-06 01:11:03 +0100 | [diff] [blame] | 1125 | /* map prot to access type */ |
| 1126 | if ((prot & PROT_READ) && (prot & PROT_WRITE)) { |
| 1127 | /* ACCESS_DEFAULT */ |
| 1128 | } |
| 1129 | else if (prot & PROT_WRITE) { |
| 1130 | access = ACCESS_WRITE; |
| 1131 | } |
| 1132 | else { |
| 1133 | access = ACCESS_READ; |
| 1134 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1135 | break; |
| 1136 | default: |
| 1137 | return PyErr_Format(PyExc_ValueError, |
| 1138 | "mmap invalid access parameter."); |
| 1139 | } |
Neal Norwitz | b567392 | 2002-09-05 21:48:07 +0000 | [diff] [blame] | 1140 | |
Victor Stinner | a6cd0cf | 2011-05-02 01:05:37 +0200 | [diff] [blame] | 1141 | #ifdef __APPLE__ |
| 1142 | /* Issue #11277: fsync(2) is not enough on OS X - a special, OS X specific |
| 1143 | fcntl(2) is necessary to force DISKSYNC and get around mmap(2) bug */ |
| 1144 | if (fd != -1) |
| 1145 | (void)fcntl(fd, F_FULLFSYNC); |
| 1146 | #endif |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1147 | if (fd != -1 && _Py_fstat_noraise(fd, &status) == 0 |
| 1148 | && S_ISREG(status.st_mode)) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1149 | if (map_size == 0) { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1150 | if (status.st_size == 0) { |
Jesus Cea | 941bfcc | 2012-09-10 00:27:55 +0200 | [diff] [blame] | 1151 | PyErr_SetString(PyExc_ValueError, |
| 1152 | "cannot mmap an empty file"); |
| 1153 | return NULL; |
| 1154 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1155 | if (offset >= status.st_size) { |
Antoine Pitrou | 305bc9e | 2011-01-20 21:07:24 +0000 | [diff] [blame] | 1156 | PyErr_SetString(PyExc_ValueError, |
| 1157 | "mmap offset is greater than file size"); |
| 1158 | return NULL; |
| 1159 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1160 | if (status.st_size - offset > PY_SSIZE_T_MAX) { |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1161 | PyErr_SetString(PyExc_ValueError, |
| 1162 | "mmap length is too large"); |
Richard Oudkerk | 0d09ba8 | 2013-02-13 12:18:03 +0000 | [diff] [blame] | 1163 | return NULL; |
| 1164 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1165 | map_size = (Py_ssize_t) (status.st_size - offset); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1166 | } else if (offset > status.st_size || status.st_size - offset < map_size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1167 | PyErr_SetString(PyExc_ValueError, |
| 1168 | "mmap length is greater than file size"); |
| 1169 | return NULL; |
| 1170 | } |
| 1171 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1172 | m_obj = (mmap_object *)type->tp_alloc(type, 0); |
| 1173 | if (m_obj == NULL) {return NULL;} |
| 1174 | m_obj->data = NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1175 | m_obj->size = map_size; |
| 1176 | m_obj->pos = 0; |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1177 | m_obj->weakreflist = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1178 | m_obj->exports = 0; |
| 1179 | m_obj->offset = offset; |
| 1180 | if (fd == -1) { |
| 1181 | m_obj->fd = -1; |
| 1182 | /* Assume the caller wants to map anonymous memory. |
| 1183 | This is the same behaviour as Windows. mmap.mmap(-1, size) |
| 1184 | on both Windows and Unix map anonymous memory. |
| 1185 | */ |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1186 | #ifdef MAP_ANONYMOUS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1187 | /* BSD way to map anonymous memory */ |
| 1188 | flags |= MAP_ANONYMOUS; |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1189 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1190 | /* SVR4 method to map anonymous memory is to open /dev/zero */ |
Victor Stinner | daf4555 | 2013-08-28 00:53:59 +0200 | [diff] [blame] | 1191 | fd = devzero = _Py_open("/dev/zero", O_RDWR); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1192 | if (devzero == -1) { |
| 1193 | Py_DECREF(m_obj); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1194 | return NULL; |
| 1195 | } |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1196 | #endif |
Victor Stinner | daf4555 | 2013-08-28 00:53:59 +0200 | [diff] [blame] | 1197 | } |
| 1198 | else { |
| 1199 | m_obj->fd = _Py_dup(fd); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1200 | if (m_obj->fd == -1) { |
| 1201 | Py_DECREF(m_obj); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1202 | return NULL; |
| 1203 | } |
| 1204 | } |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1205 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1206 | m_obj->data = mmap(NULL, map_size, |
| 1207 | prot, flags, |
| 1208 | fd, offset); |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1209 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1210 | if (devzero != -1) { |
| 1211 | close(devzero); |
| 1212 | } |
| 1213 | |
| 1214 | if (m_obj->data == (char *)-1) { |
| 1215 | m_obj->data = NULL; |
| 1216 | Py_DECREF(m_obj); |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1217 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1218 | return NULL; |
| 1219 | } |
| 1220 | m_obj->access = (access_mode)access; |
| 1221 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1222 | } |
| 1223 | #endif /* UNIX */ |
| 1224 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 1225 | #ifdef MS_WINDOWS |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1226 | |
| 1227 | /* A note on sizes and offsets: while the actual map size must hold in a |
| 1228 | Py_ssize_t, both the total file size and the start offset can be longer |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 1229 | than a Py_ssize_t, so we use long long which is always 64-bit. |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1230 | */ |
| 1231 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1232 | static PyObject * |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1233 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1234 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1235 | mmap_object *m_obj; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1236 | Py_ssize_t map_size; |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 1237 | long long offset = 0, size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1238 | DWORD off_hi; /* upper 32 bits of offset */ |
| 1239 | DWORD off_lo; /* lower 32 bits of offset */ |
| 1240 | DWORD size_hi; /* upper 32 bits of size */ |
| 1241 | DWORD size_lo; /* lower 32 bits of size */ |
| 1242 | char *tagname = ""; |
| 1243 | DWORD dwErr = 0; |
| 1244 | int fileno; |
| 1245 | HANDLE fh = 0; |
| 1246 | int access = (access_mode)ACCESS_DEFAULT; |
| 1247 | DWORD flProtect, dwDesiredAccess; |
| 1248 | static char *keywords[] = { "fileno", "length", |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1249 | "tagname", |
| 1250 | "access", "offset", NULL }; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1251 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1252 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "in|ziL", keywords, |
| 1253 | &fileno, &map_size, |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1254 | &tagname, &access, &offset)) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1255 | return NULL; |
| 1256 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1257 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1258 | switch((access_mode)access) { |
| 1259 | case ACCESS_READ: |
| 1260 | flProtect = PAGE_READONLY; |
| 1261 | dwDesiredAccess = FILE_MAP_READ; |
| 1262 | break; |
| 1263 | case ACCESS_DEFAULT: case ACCESS_WRITE: |
| 1264 | flProtect = PAGE_READWRITE; |
| 1265 | dwDesiredAccess = FILE_MAP_WRITE; |
| 1266 | break; |
| 1267 | case ACCESS_COPY: |
| 1268 | flProtect = PAGE_WRITECOPY; |
| 1269 | dwDesiredAccess = FILE_MAP_COPY; |
| 1270 | break; |
| 1271 | default: |
| 1272 | return PyErr_Format(PyExc_ValueError, |
| 1273 | "mmap invalid access parameter."); |
| 1274 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1275 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1276 | if (map_size < 0) { |
| 1277 | PyErr_SetString(PyExc_OverflowError, |
| 1278 | "memory mapped length must be postiive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1279 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1280 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1281 | if (offset < 0) { |
| 1282 | PyErr_SetString(PyExc_OverflowError, |
| 1283 | "memory mapped offset must be positive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1284 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1285 | } |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 1286 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1287 | /* assume -1 and 0 both mean invalid filedescriptor |
| 1288 | to 'anonymously' map memory. |
| 1289 | XXX: fileno == 0 is a valid fd, but was accepted prior to 2.5. |
| 1290 | XXX: Should this code be added? |
| 1291 | if (fileno == 0) |
| 1292 | PyErr_WarnEx(PyExc_DeprecationWarning, |
| 1293 | "don't use 0 for anonymous memory", |
| 1294 | 1); |
| 1295 | */ |
| 1296 | if (fileno != -1 && fileno != 0) { |
Brian Curtin | ea47eaa | 2010-08-01 15:26:26 +0000 | [diff] [blame] | 1297 | /* Ensure that fileno is within the CRT's valid range */ |
Steve Dower | 8fc8980 | 2015-04-12 00:26:27 -0400 | [diff] [blame] | 1298 | _Py_BEGIN_SUPPRESS_IPH |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1299 | fh = (HANDLE)_get_osfhandle(fileno); |
Steve Dower | 8fc8980 | 2015-04-12 00:26:27 -0400 | [diff] [blame] | 1300 | _Py_END_SUPPRESS_IPH |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1301 | if (fh==(HANDLE)-1) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1302 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1303 | return NULL; |
| 1304 | } |
| 1305 | /* Win9x appears to need us seeked to zero */ |
| 1306 | lseek(fileno, 0, SEEK_SET); |
| 1307 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1308 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1309 | m_obj = (mmap_object *)type->tp_alloc(type, 0); |
| 1310 | if (m_obj == NULL) |
| 1311 | return NULL; |
| 1312 | /* Set every field to an invalid marker, so we can safely |
| 1313 | destruct the object in the face of failure */ |
| 1314 | m_obj->data = NULL; |
| 1315 | m_obj->file_handle = INVALID_HANDLE_VALUE; |
| 1316 | m_obj->map_handle = NULL; |
| 1317 | m_obj->tagname = NULL; |
| 1318 | m_obj->offset = offset; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1319 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1320 | if (fh) { |
| 1321 | /* It is necessary to duplicate the handle, so the |
| 1322 | Python code can close it on us */ |
| 1323 | if (!DuplicateHandle( |
| 1324 | GetCurrentProcess(), /* source process handle */ |
| 1325 | fh, /* handle to be duplicated */ |
| 1326 | GetCurrentProcess(), /* target proc handle */ |
| 1327 | (LPHANDLE)&m_obj->file_handle, /* result */ |
| 1328 | 0, /* access - ignored due to options value */ |
| 1329 | FALSE, /* inherited by child processes? */ |
| 1330 | DUPLICATE_SAME_ACCESS)) { /* options */ |
| 1331 | dwErr = GetLastError(); |
| 1332 | Py_DECREF(m_obj); |
| 1333 | PyErr_SetFromWindowsErr(dwErr); |
| 1334 | return NULL; |
| 1335 | } |
| 1336 | if (!map_size) { |
| 1337 | DWORD low,high; |
| 1338 | low = GetFileSize(fh, &high); |
| 1339 | /* low might just happen to have the value INVALID_FILE_SIZE; |
| 1340 | so we need to check the last error also. */ |
| 1341 | if (low == INVALID_FILE_SIZE && |
| 1342 | (dwErr = GetLastError()) != NO_ERROR) { |
| 1343 | Py_DECREF(m_obj); |
| 1344 | return PyErr_SetFromWindowsErr(dwErr); |
| 1345 | } |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 1346 | |
Benjamin Peterson | af580df | 2016-09-06 10:46:49 -0700 | [diff] [blame] | 1347 | size = (((long long) high) << 32) + low; |
Jesus Cea | 1f2799b | 2012-09-10 22:49:50 +0200 | [diff] [blame] | 1348 | if (size == 0) { |
| 1349 | PyErr_SetString(PyExc_ValueError, |
| 1350 | "cannot mmap an empty file"); |
Jesus Cea | e8db356 | 2012-09-10 22:58:07 +0200 | [diff] [blame] | 1351 | Py_DECREF(m_obj); |
Jesus Cea | 1f2799b | 2012-09-10 22:49:50 +0200 | [diff] [blame] | 1352 | return NULL; |
| 1353 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1354 | if (offset >= size) { |
Antoine Pitrou | 305bc9e | 2011-01-20 21:07:24 +0000 | [diff] [blame] | 1355 | PyErr_SetString(PyExc_ValueError, |
| 1356 | "mmap offset is greater than file size"); |
| 1357 | Py_DECREF(m_obj); |
| 1358 | return NULL; |
| 1359 | } |
Richard Oudkerk | 0d09ba8 | 2013-02-13 12:18:03 +0000 | [diff] [blame] | 1360 | if (size - offset > PY_SSIZE_T_MAX) { |
| 1361 | PyErr_SetString(PyExc_ValueError, |
| 1362 | "mmap length is too large"); |
| 1363 | Py_DECREF(m_obj); |
| 1364 | return NULL; |
| 1365 | } |
| 1366 | m_obj->size = (Py_ssize_t) (size - offset); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1367 | } else { |
| 1368 | m_obj->size = map_size; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1369 | size = offset + map_size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1370 | } |
| 1371 | } |
| 1372 | else { |
| 1373 | m_obj->size = map_size; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1374 | size = offset + map_size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1375 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1376 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1377 | /* set the initial position */ |
| 1378 | m_obj->pos = (size_t) 0; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1379 | |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1380 | m_obj->weakreflist = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1381 | m_obj->exports = 0; |
| 1382 | /* set the tag name */ |
| 1383 | if (tagname != NULL && *tagname != '\0') { |
| 1384 | m_obj->tagname = PyMem_Malloc(strlen(tagname)+1); |
| 1385 | if (m_obj->tagname == NULL) { |
| 1386 | PyErr_NoMemory(); |
| 1387 | Py_DECREF(m_obj); |
| 1388 | return NULL; |
| 1389 | } |
| 1390 | strcpy(m_obj->tagname, tagname); |
| 1391 | } |
| 1392 | else |
| 1393 | m_obj->tagname = NULL; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1394 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1395 | m_obj->access = (access_mode)access; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1396 | size_hi = (DWORD)(size >> 32); |
| 1397 | size_lo = (DWORD)(size & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1398 | off_hi = (DWORD)(offset >> 32); |
| 1399 | off_lo = (DWORD)(offset & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1400 | /* For files, it would be sufficient to pass 0 as size. |
| 1401 | For anonymous maps, we have to pass the size explicitly. */ |
| 1402 | m_obj->map_handle = CreateFileMapping(m_obj->file_handle, |
| 1403 | NULL, |
| 1404 | flProtect, |
| 1405 | size_hi, |
| 1406 | size_lo, |
| 1407 | m_obj->tagname); |
| 1408 | if (m_obj->map_handle != NULL) { |
| 1409 | m_obj->data = (char *) MapViewOfFile(m_obj->map_handle, |
| 1410 | dwDesiredAccess, |
| 1411 | off_hi, |
| 1412 | off_lo, |
| 1413 | m_obj->size); |
| 1414 | if (m_obj->data != NULL) |
| 1415 | return (PyObject *)m_obj; |
| 1416 | else { |
| 1417 | dwErr = GetLastError(); |
| 1418 | CloseHandle(m_obj->map_handle); |
| 1419 | m_obj->map_handle = NULL; |
| 1420 | } |
| 1421 | } else |
| 1422 | dwErr = GetLastError(); |
| 1423 | Py_DECREF(m_obj); |
| 1424 | PyErr_SetFromWindowsErr(dwErr); |
| 1425 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1426 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 1427 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1428 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1429 | static void |
| 1430 | setint(PyObject *d, const char *name, long value) |
| 1431 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1432 | PyObject *o = PyLong_FromLong(value); |
| 1433 | if (o && PyDict_SetItemString(d, name, o) == 0) { |
| 1434 | Py_DECREF(o); |
| 1435 | } |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1436 | } |
| 1437 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1438 | |
| 1439 | static struct PyModuleDef mmapmodule = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1440 | PyModuleDef_HEAD_INIT, |
| 1441 | "mmap", |
| 1442 | NULL, |
| 1443 | -1, |
| 1444 | NULL, |
| 1445 | NULL, |
| 1446 | NULL, |
| 1447 | NULL, |
| 1448 | NULL |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1449 | }; |
| 1450 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 1451 | PyMODINIT_FUNC |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1452 | PyInit_mmap(void) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1453 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1454 | PyObject *dict, *module; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1455 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1456 | if (PyType_Ready(&mmap_object_type) < 0) |
| 1457 | return NULL; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1458 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1459 | module = PyModule_Create(&mmapmodule); |
| 1460 | if (module == NULL) |
| 1461 | return NULL; |
| 1462 | dict = PyModule_GetDict(module); |
| 1463 | if (!dict) |
| 1464 | return NULL; |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1465 | PyDict_SetItemString(dict, "error", PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1466 | PyDict_SetItemString(dict, "mmap", (PyObject*) &mmap_object_type); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1467 | #ifdef PROT_EXEC |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1468 | setint(dict, "PROT_EXEC", PROT_EXEC); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1469 | #endif |
| 1470 | #ifdef PROT_READ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1471 | setint(dict, "PROT_READ", PROT_READ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1472 | #endif |
| 1473 | #ifdef PROT_WRITE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1474 | setint(dict, "PROT_WRITE", PROT_WRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1475 | #endif |
| 1476 | |
| 1477 | #ifdef MAP_SHARED |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1478 | setint(dict, "MAP_SHARED", MAP_SHARED); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1479 | #endif |
| 1480 | #ifdef MAP_PRIVATE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1481 | setint(dict, "MAP_PRIVATE", MAP_PRIVATE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1482 | #endif |
| 1483 | #ifdef MAP_DENYWRITE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1484 | setint(dict, "MAP_DENYWRITE", MAP_DENYWRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1485 | #endif |
| 1486 | #ifdef MAP_EXECUTABLE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1487 | setint(dict, "MAP_EXECUTABLE", MAP_EXECUTABLE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1488 | #endif |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1489 | #ifdef MAP_ANONYMOUS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1490 | setint(dict, "MAP_ANON", MAP_ANONYMOUS); |
| 1491 | setint(dict, "MAP_ANONYMOUS", MAP_ANONYMOUS); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1492 | #endif |
| 1493 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1494 | setint(dict, "PAGESIZE", (long)my_getpagesize()); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 1495 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1496 | setint(dict, "ALLOCATIONGRANULARITY", (long)my_getallocationgranularity()); |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 1497 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1498 | setint(dict, "ACCESS_READ", ACCESS_READ); |
| 1499 | setint(dict, "ACCESS_WRITE", ACCESS_WRITE); |
| 1500 | setint(dict, "ACCESS_COPY", ACCESS_COPY); |
| 1501 | return module; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1502 | } |