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 |
| 96 | PY_LONG_LONG offset; |
| 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); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 400 | Py_INCREF(Py_None); |
| 401 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 405 | mmap_write_byte_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 406 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 407 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 408 | char value; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 409 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 410 | CHECK_VALID(NULL); |
| 411 | if (!PyArg_ParseTuple(args, "b:write_byte", &value)) |
| 412 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 413 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 414 | if (!is_writable(self)) |
| 415 | return NULL; |
Hirokazu Yamamoto | 39c6dea | 2009-02-28 10:56:50 +0000 | [diff] [blame] | 416 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 417 | if (self->pos < self->size) { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 418 | self->data[self->pos++] = value; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 419 | Py_INCREF(Py_None); |
| 420 | return Py_None; |
| 421 | } |
| 422 | else { |
| 423 | PyErr_SetString(PyExc_ValueError, "write byte out of range"); |
| 424 | return NULL; |
| 425 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 426 | } |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 427 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 428 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 429 | mmap_size_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 430 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 431 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 432 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 433 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 434 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 435 | if (self->file_handle != INVALID_HANDLE_VALUE) { |
| 436 | DWORD low,high; |
| 437 | PY_LONG_LONG size; |
| 438 | low = GetFileSize(self->file_handle, &high); |
| 439 | if (low == INVALID_FILE_SIZE) { |
| 440 | /* It might be that the function appears to have failed, |
| 441 | when indeed its size equals INVALID_FILE_SIZE */ |
| 442 | DWORD error = GetLastError(); |
| 443 | if (error != NO_ERROR) |
| 444 | return PyErr_SetFromWindowsErr(error); |
| 445 | } |
| 446 | if (!high && low < LONG_MAX) |
| 447 | return PyLong_FromLong((long)low); |
| 448 | size = (((PY_LONG_LONG)high)<<32) + low; |
| 449 | return PyLong_FromLongLong(size); |
| 450 | } else { |
| 451 | return PyLong_FromSsize_t(self->size); |
| 452 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 453 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 454 | |
| 455 | #ifdef UNIX |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 456 | { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 457 | struct _Py_stat_struct status; |
| 458 | if (_Py_fstat(self->fd, &status) == -1) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 459 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 460 | #ifdef HAVE_LARGEFILE_SUPPORT |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 461 | return PyLong_FromLongLong(status.st_size); |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 462 | #else |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 463 | return PyLong_FromLong(status.st_size); |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 464 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 465 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 466 | #endif /* UNIX */ |
| 467 | } |
| 468 | |
| 469 | /* This assumes that you want the entire file mapped, |
| 470 | / and when recreating the map will make the new file |
| 471 | / have the new size |
| 472 | / |
| 473 | / Is this really necessary? This could easily be done |
| 474 | / from python by just closing and re-opening with the |
| 475 | / new size? |
| 476 | */ |
| 477 | |
| 478 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 479 | mmap_resize_method(mmap_object *self, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 480 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 481 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 482 | Py_ssize_t new_size; |
| 483 | CHECK_VALID(NULL); |
| 484 | if (!PyArg_ParseTuple(args, "n:resize", &new_size) || |
| 485 | !is_resizeable(self)) { |
| 486 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 487 | } |
| 488 | if (new_size < 0 || PY_SSIZE_T_MAX - new_size < self->offset) { |
| 489 | PyErr_SetString(PyExc_ValueError, "new size out of range"); |
| 490 | return NULL; |
| 491 | } |
| 492 | |
| 493 | { |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 494 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 495 | DWORD dwErrCode = 0; |
| 496 | DWORD off_hi, off_lo, newSizeLow, newSizeHigh; |
| 497 | /* First, unmap the file view */ |
| 498 | UnmapViewOfFile(self->data); |
| 499 | self->data = NULL; |
| 500 | /* Close the mapping object */ |
| 501 | CloseHandle(self->map_handle); |
| 502 | self->map_handle = NULL; |
| 503 | /* Move to the desired EOF position */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 504 | newSizeHigh = (DWORD)((self->offset + new_size) >> 32); |
| 505 | newSizeLow = (DWORD)((self->offset + new_size) & 0xFFFFFFFF); |
| 506 | off_hi = (DWORD)(self->offset >> 32); |
| 507 | off_lo = (DWORD)(self->offset & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 508 | SetFilePointer(self->file_handle, |
| 509 | newSizeLow, &newSizeHigh, FILE_BEGIN); |
| 510 | /* Change the size of the file */ |
| 511 | SetEndOfFile(self->file_handle); |
| 512 | /* Create another mapping object and remap the file view */ |
| 513 | self->map_handle = CreateFileMapping( |
| 514 | self->file_handle, |
| 515 | NULL, |
| 516 | PAGE_READWRITE, |
| 517 | 0, |
| 518 | 0, |
| 519 | self->tagname); |
| 520 | if (self->map_handle != NULL) { |
| 521 | self->data = (char *) MapViewOfFile(self->map_handle, |
| 522 | FILE_MAP_WRITE, |
| 523 | off_hi, |
| 524 | off_lo, |
| 525 | new_size); |
| 526 | if (self->data != NULL) { |
| 527 | self->size = new_size; |
| 528 | Py_INCREF(Py_None); |
| 529 | return Py_None; |
| 530 | } else { |
| 531 | dwErrCode = GetLastError(); |
| 532 | CloseHandle(self->map_handle); |
| 533 | self->map_handle = NULL; |
| 534 | } |
| 535 | } else { |
| 536 | dwErrCode = GetLastError(); |
| 537 | } |
| 538 | PyErr_SetFromWindowsErr(dwErrCode); |
| 539 | return NULL; |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 540 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 541 | |
| 542 | #ifdef UNIX |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 543 | #ifndef HAVE_MREMAP |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 544 | PyErr_SetString(PyExc_SystemError, |
| 545 | "mmap: resizing not available--no mremap()"); |
| 546 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 547 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 548 | void *newmap; |
Armin Rigo | 335ffe8 | 2005-09-20 19:04:02 +0000 | [diff] [blame] | 549 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 550 | if (self->fd != -1 && ftruncate(self->fd, self->offset + new_size) == -1) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 551 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 552 | return NULL; |
| 553 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 554 | |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 555 | #ifdef MREMAP_MAYMOVE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 556 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 557 | #else |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 558 | #if defined(__NetBSD__) |
| 559 | newmap = mremap(self->data, self->size, self->data, new_size, 0); |
| 560 | #else |
| 561 | newmap = mremap(self->data, self->size, new_size, 0); |
| 562 | #endif /* __NetBSD__ */ |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 563 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 564 | if (newmap == (void *)-1) |
| 565 | { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 566 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 567 | return NULL; |
| 568 | } |
| 569 | self->data = newmap; |
| 570 | self->size = new_size; |
| 571 | Py_INCREF(Py_None); |
| 572 | return Py_None; |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 573 | #endif /* HAVE_MREMAP */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 574 | #endif /* UNIX */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 575 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | static PyObject * |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 579 | mmap_tell_method(mmap_object *self, PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 580 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 581 | CHECK_VALID(NULL); |
| 582 | return PyLong_FromSize_t(self->pos); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 586 | mmap_flush_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 587 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 588 | Py_ssize_t offset = 0; |
| 589 | Py_ssize_t size = self->size; |
| 590 | CHECK_VALID(NULL); |
| 591 | if (!PyArg_ParseTuple(args, "|nn:flush", &offset, &size)) |
| 592 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 593 | if (size < 0 || offset < 0 || self->size - offset < size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 594 | PyErr_SetString(PyExc_ValueError, "flush values out of range"); |
| 595 | return NULL; |
| 596 | } |
R. David Murray | e194dd6 | 2010-10-18 01:14:06 +0000 | [diff] [blame] | 597 | |
| 598 | if (self->access == ACCESS_READ || self->access == ACCESS_COPY) |
| 599 | return PyLong_FromLong(0); |
| 600 | |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 601 | #ifdef MS_WINDOWS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 602 | return PyLong_FromLong((long) FlushViewOfFile(self->data+offset, size)); |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 603 | #elif defined(UNIX) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 604 | /* XXX semantics of return value? */ |
| 605 | /* XXX flags for msync? */ |
| 606 | if (-1 == msync(self->data + offset, size, MS_SYNC)) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 607 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 608 | return NULL; |
| 609 | } |
| 610 | return PyLong_FromLong(0); |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 611 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 612 | PyErr_SetString(PyExc_ValueError, "flush not supported on this system"); |
| 613 | return NULL; |
Christian Heimes | af98da1 | 2008-01-27 15:18:18 +0000 | [diff] [blame] | 614 | #endif |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 618 | mmap_seek_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 619 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 620 | Py_ssize_t dist; |
| 621 | int how=0; |
| 622 | CHECK_VALID(NULL); |
| 623 | if (!PyArg_ParseTuple(args, "n|i:seek", &dist, &how)) |
| 624 | return NULL; |
| 625 | else { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 626 | Py_ssize_t where; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 627 | switch (how) { |
| 628 | case 0: /* relative to start */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 629 | where = dist; |
| 630 | break; |
| 631 | case 1: /* relative to current position */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 632 | if (PY_SSIZE_T_MAX - self->pos < dist) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 633 | goto onoutofrange; |
| 634 | where = self->pos + dist; |
| 635 | break; |
| 636 | case 2: /* relative to end */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 637 | if (PY_SSIZE_T_MAX - self->size < dist) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 638 | goto onoutofrange; |
| 639 | where = self->size + dist; |
| 640 | break; |
| 641 | default: |
| 642 | PyErr_SetString(PyExc_ValueError, "unknown seek type"); |
| 643 | return NULL; |
| 644 | } |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 645 | if (where > self->size || where < 0) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 646 | goto onoutofrange; |
| 647 | self->pos = where; |
| 648 | Py_INCREF(Py_None); |
| 649 | return Py_None; |
| 650 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 651 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 652 | onoutofrange: |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 653 | PyErr_SetString(PyExc_ValueError, "seek out of range"); |
| 654 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 658 | mmap_move_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 659 | { |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 660 | Py_ssize_t dest, src, cnt; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 661 | CHECK_VALID(NULL); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 662 | if (!PyArg_ParseTuple(args, "nnn:move", &dest, &src, &cnt) || |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 663 | !is_writable(self)) { |
| 664 | return NULL; |
| 665 | } else { |
| 666 | /* bounds check the values */ |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 667 | if (dest < 0 || src < 0 || cnt < 0) |
| 668 | goto bounds; |
| 669 | if (self->size - dest < cnt || self->size - src < cnt) |
| 670 | goto bounds; |
| 671 | |
| 672 | memmove(&self->data[dest], &self->data[src], cnt); |
| 673 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 674 | Py_INCREF(Py_None); |
| 675 | return Py_None; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 676 | |
| 677 | bounds: |
| 678 | PyErr_SetString(PyExc_ValueError, |
| 679 | "source, destination, or count out of range"); |
| 680 | return NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 681 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 682 | } |
| 683 | |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 684 | static PyObject * |
| 685 | mmap_closed_get(mmap_object *self) |
| 686 | { |
| 687 | #ifdef MS_WINDOWS |
| 688 | return PyBool_FromLong(self->map_handle == NULL ? 1 : 0); |
| 689 | #elif defined(UNIX) |
| 690 | return PyBool_FromLong(self->data == NULL ? 1 : 0); |
| 691 | #endif |
| 692 | } |
| 693 | |
| 694 | static PyObject * |
| 695 | mmap__enter__method(mmap_object *self, PyObject *args) |
| 696 | { |
| 697 | CHECK_VALID(NULL); |
| 698 | |
| 699 | Py_INCREF(self); |
| 700 | return (PyObject *)self; |
| 701 | } |
| 702 | |
| 703 | static PyObject * |
| 704 | mmap__exit__method(PyObject *self, PyObject *args) |
| 705 | { |
Martin v. Löwis | bd928fe | 2011-10-14 10:20:37 +0200 | [diff] [blame] | 706 | _Py_IDENTIFIER(close); |
Martin v. Löwis | afe55bb | 2011-10-09 10:38:36 +0200 | [diff] [blame] | 707 | |
| 708 | return _PyObject_CallMethodId(self, &PyId_close, NULL); |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 709 | } |
| 710 | |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 711 | #ifdef MS_WINDOWS |
| 712 | static PyObject * |
| 713 | mmap__sizeof__method(mmap_object *self, void *unused) |
| 714 | { |
| 715 | Py_ssize_t res; |
| 716 | |
Serhiy Storchaka | 5c4064e | 2015-12-19 20:05:25 +0200 | [diff] [blame] | 717 | res = _PyObject_SIZE(Py_TYPE(self)); |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 718 | if (self->tagname) |
| 719 | res += strlen(self->tagname) + 1; |
| 720 | return PyLong_FromSsize_t(res); |
| 721 | } |
| 722 | #endif |
| 723 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 724 | static struct PyMethodDef mmap_object_methods[] = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 725 | {"close", (PyCFunction) mmap_close_method, METH_NOARGS}, |
| 726 | {"find", (PyCFunction) mmap_find_method, METH_VARARGS}, |
| 727 | {"rfind", (PyCFunction) mmap_rfind_method, METH_VARARGS}, |
| 728 | {"flush", (PyCFunction) mmap_flush_method, METH_VARARGS}, |
| 729 | {"move", (PyCFunction) mmap_move_method, METH_VARARGS}, |
| 730 | {"read", (PyCFunction) mmap_read_method, METH_VARARGS}, |
| 731 | {"read_byte", (PyCFunction) mmap_read_byte_method, METH_NOARGS}, |
| 732 | {"readline", (PyCFunction) mmap_read_line_method, METH_NOARGS}, |
| 733 | {"resize", (PyCFunction) mmap_resize_method, METH_VARARGS}, |
| 734 | {"seek", (PyCFunction) mmap_seek_method, METH_VARARGS}, |
| 735 | {"size", (PyCFunction) mmap_size_method, METH_NOARGS}, |
| 736 | {"tell", (PyCFunction) mmap_tell_method, METH_NOARGS}, |
| 737 | {"write", (PyCFunction) mmap_write_method, METH_VARARGS}, |
| 738 | {"write_byte", (PyCFunction) mmap_write_byte_method, METH_VARARGS}, |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 739 | {"__enter__", (PyCFunction) mmap__enter__method, METH_NOARGS}, |
| 740 | {"__exit__", (PyCFunction) mmap__exit__method, METH_VARARGS}, |
Serhiy Storchaka | 76b4765 | 2014-08-19 17:11:20 +0300 | [diff] [blame] | 741 | #ifdef MS_WINDOWS |
| 742 | {"__sizeof__", (PyCFunction) mmap__sizeof__method, METH_NOARGS}, |
| 743 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 744 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 745 | }; |
| 746 | |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 747 | static PyGetSetDef mmap_object_getset[] = { |
| 748 | {"closed", (getter) mmap_closed_get, NULL, NULL}, |
| 749 | {NULL} |
| 750 | }; |
| 751 | |
| 752 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 753 | /* Functions for treating an mmap'ed file as a buffer */ |
| 754 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 755 | static int |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 756 | mmap_buffer_getbuf(mmap_object *self, Py_buffer *view, int flags) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 757 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 758 | CHECK_VALID(-1); |
| 759 | if (PyBuffer_FillInfo(view, (PyObject*)self, self->data, self->size, |
| 760 | (self->access == ACCESS_READ), flags) < 0) |
| 761 | return -1; |
| 762 | self->exports++; |
| 763 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 764 | } |
| 765 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 766 | static void |
Travis E. Oliphant | 8ae62b6 | 2007-09-23 02:00:13 +0000 | [diff] [blame] | 767 | mmap_buffer_releasebuf(mmap_object *self, Py_buffer *view) |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 768 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 769 | self->exports--; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 770 | } |
| 771 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 772 | static Py_ssize_t |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 773 | mmap_length(mmap_object *self) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 774 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 775 | CHECK_VALID(-1); |
| 776 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 780 | mmap_item(mmap_object *self, Py_ssize_t i) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 781 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 782 | CHECK_VALID(NULL); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 783 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 784 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 785 | return NULL; |
| 786 | } |
| 787 | return PyBytes_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | static PyObject * |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 791 | mmap_subscript(mmap_object *self, PyObject *item) |
| 792 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 793 | CHECK_VALID(NULL); |
| 794 | if (PyIndex_Check(item)) { |
| 795 | Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); |
| 796 | if (i == -1 && PyErr_Occurred()) |
| 797 | return NULL; |
| 798 | if (i < 0) |
| 799 | i += self->size; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 800 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 801 | PyErr_SetString(PyExc_IndexError, |
| 802 | "mmap index out of range"); |
| 803 | return NULL; |
| 804 | } |
| 805 | return PyLong_FromLong(Py_CHARMASK(self->data[i])); |
| 806 | } |
| 807 | else if (PySlice_Check(item)) { |
| 808 | Py_ssize_t start, stop, step, slicelen; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 809 | |
Martin v. Löwis | 4d0d471 | 2010-12-03 20:14:31 +0000 | [diff] [blame] | 810 | if (PySlice_GetIndicesEx(item, self->size, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 811 | &start, &stop, &step, &slicelen) < 0) { |
| 812 | return NULL; |
| 813 | } |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 814 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 815 | if (slicelen <= 0) |
| 816 | return PyBytes_FromStringAndSize("", 0); |
| 817 | else if (step == 1) |
| 818 | return PyBytes_FromStringAndSize(self->data + start, |
| 819 | slicelen); |
| 820 | else { |
| 821 | char *result_buf = (char *)PyMem_Malloc(slicelen); |
| 822 | Py_ssize_t cur, i; |
| 823 | PyObject *result; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 824 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 825 | if (result_buf == NULL) |
| 826 | return PyErr_NoMemory(); |
| 827 | for (cur = start, i = 0; i < slicelen; |
| 828 | cur += step, i++) { |
| 829 | result_buf[i] = self->data[cur]; |
| 830 | } |
| 831 | result = PyBytes_FromStringAndSize(result_buf, |
| 832 | slicelen); |
| 833 | PyMem_Free(result_buf); |
| 834 | return result; |
| 835 | } |
| 836 | } |
| 837 | else { |
| 838 | PyErr_SetString(PyExc_TypeError, |
| 839 | "mmap indices must be integers"); |
| 840 | return NULL; |
| 841 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 845 | mmap_concat(mmap_object *self, PyObject *bb) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 846 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 847 | CHECK_VALID(NULL); |
| 848 | PyErr_SetString(PyExc_SystemError, |
| 849 | "mmaps don't support concatenation"); |
| 850 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 851 | } |
| 852 | |
| 853 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 854 | mmap_repeat(mmap_object *self, Py_ssize_t n) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 855 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 856 | CHECK_VALID(NULL); |
| 857 | PyErr_SetString(PyExc_SystemError, |
| 858 | "mmaps don't support repeat operation"); |
| 859 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | static int |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 863 | 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] | 864 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 865 | const char *buf; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 866 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 867 | CHECK_VALID(-1); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 868 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 869 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 870 | return -1; |
| 871 | } |
| 872 | if (v == NULL) { |
| 873 | PyErr_SetString(PyExc_TypeError, |
| 874 | "mmap object doesn't support item deletion"); |
| 875 | return -1; |
| 876 | } |
| 877 | if (! (PyBytes_Check(v) && PyBytes_Size(v)==1) ) { |
| 878 | PyErr_SetString(PyExc_IndexError, |
| 879 | "mmap assignment must be length-1 bytes()"); |
| 880 | return -1; |
| 881 | } |
| 882 | if (!is_writable(self)) |
| 883 | return -1; |
| 884 | buf = PyBytes_AsString(v); |
| 885 | self->data[i] = buf[0]; |
| 886 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 887 | } |
| 888 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 889 | static int |
| 890 | mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value) |
| 891 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 892 | CHECK_VALID(-1); |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 893 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 894 | if (!is_writable(self)) |
| 895 | return -1; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 896 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 897 | if (PyIndex_Check(item)) { |
| 898 | Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); |
| 899 | Py_ssize_t v; |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 900 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 901 | if (i == -1 && PyErr_Occurred()) |
| 902 | return -1; |
| 903 | if (i < 0) |
| 904 | i += self->size; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 905 | if (i < 0 || i >= self->size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 906 | PyErr_SetString(PyExc_IndexError, |
| 907 | "mmap index out of range"); |
| 908 | return -1; |
| 909 | } |
| 910 | if (value == NULL) { |
| 911 | PyErr_SetString(PyExc_TypeError, |
| 912 | "mmap doesn't support item deletion"); |
| 913 | return -1; |
| 914 | } |
| 915 | if (!PyIndex_Check(value)) { |
| 916 | PyErr_SetString(PyExc_TypeError, |
| 917 | "mmap item value must be an int"); |
| 918 | return -1; |
| 919 | } |
| 920 | v = PyNumber_AsSsize_t(value, PyExc_TypeError); |
| 921 | if (v == -1 && PyErr_Occurred()) |
| 922 | return -1; |
| 923 | if (v < 0 || v > 255) { |
| 924 | PyErr_SetString(PyExc_ValueError, |
| 925 | "mmap item value must be " |
| 926 | "in range(0, 256)"); |
| 927 | return -1; |
| 928 | } |
Antoine Pitrou | 22e4155 | 2010-08-15 18:07:50 +0000 | [diff] [blame] | 929 | self->data[i] = (char) v; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 930 | return 0; |
| 931 | } |
| 932 | else if (PySlice_Check(item)) { |
| 933 | Py_ssize_t start, stop, step, slicelen; |
| 934 | Py_buffer vbuf; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 935 | |
Martin v. Löwis | 4d0d471 | 2010-12-03 20:14:31 +0000 | [diff] [blame] | 936 | if (PySlice_GetIndicesEx(item, |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 937 | self->size, &start, &stop, |
| 938 | &step, &slicelen) < 0) { |
| 939 | return -1; |
| 940 | } |
| 941 | if (value == NULL) { |
| 942 | PyErr_SetString(PyExc_TypeError, |
| 943 | "mmap object doesn't support slice deletion"); |
| 944 | return -1; |
| 945 | } |
| 946 | if (PyObject_GetBuffer(value, &vbuf, PyBUF_SIMPLE) < 0) |
| 947 | return -1; |
| 948 | if (vbuf.len != slicelen) { |
| 949 | PyErr_SetString(PyExc_IndexError, |
| 950 | "mmap slice assignment is wrong size"); |
| 951 | PyBuffer_Release(&vbuf); |
| 952 | return -1; |
| 953 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 954 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 955 | if (slicelen == 0) { |
| 956 | } |
| 957 | else if (step == 1) { |
| 958 | memcpy(self->data + start, vbuf.buf, slicelen); |
| 959 | } |
| 960 | else { |
| 961 | Py_ssize_t cur, i; |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 962 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 963 | for (cur = start, i = 0; |
| 964 | i < slicelen; |
| 965 | cur += step, i++) |
| 966 | { |
| 967 | self->data[cur] = ((char *)vbuf.buf)[i]; |
| 968 | } |
| 969 | } |
| 970 | PyBuffer_Release(&vbuf); |
| 971 | return 0; |
| 972 | } |
| 973 | else { |
| 974 | PyErr_SetString(PyExc_TypeError, |
| 975 | "mmap indices must be integer"); |
| 976 | return -1; |
| 977 | } |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 978 | } |
| 979 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 980 | static PySequenceMethods mmap_as_sequence = { |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 981 | (lenfunc)mmap_length, /*sq_length*/ |
| 982 | (binaryfunc)mmap_concat, /*sq_concat*/ |
| 983 | (ssizeargfunc)mmap_repeat, /*sq_repeat*/ |
| 984 | (ssizeargfunc)mmap_item, /*sq_item*/ |
| 985 | 0, /*sq_slice*/ |
| 986 | (ssizeobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 987 | 0, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 988 | }; |
| 989 | |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 990 | static PyMappingMethods mmap_as_mapping = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 991 | (lenfunc)mmap_length, |
| 992 | (binaryfunc)mmap_subscript, |
| 993 | (objobjargproc)mmap_ass_subscript, |
Thomas Wouters | ed03b41 | 2007-08-28 21:37:11 +0000 | [diff] [blame] | 994 | }; |
| 995 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 996 | static PyBufferProcs mmap_as_buffer = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 997 | (getbufferproc)mmap_buffer_getbuf, |
| 998 | (releasebufferproc)mmap_buffer_releasebuf, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 999 | }; |
| 1000 | |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1001 | static PyObject * |
| 1002 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict); |
| 1003 | |
Christian Heimes | e1c9811 | 2008-01-21 11:20:28 +0000 | [diff] [blame] | 1004 | PyDoc_STRVAR(mmap_doc, |
| 1005 | "Windows: mmap(fileno, length[, tagname[, access[, offset]]])\n\ |
| 1006 | \n\ |
| 1007 | Maps length bytes from the file specified by the file handle fileno,\n\ |
| 1008 | and returns a mmap object. If length is larger than the current size\n\ |
| 1009 | of the file, the file is extended to contain length bytes. If length\n\ |
| 1010 | is 0, the maximum length of the map is the current size of the file,\n\ |
| 1011 | except that if the file is empty Windows raises an exception (you cannot\n\ |
| 1012 | create an empty mapping on Windows).\n\ |
| 1013 | \n\ |
| 1014 | Unix: mmap(fileno, length[, flags[, prot[, access[, offset]]]])\n\ |
| 1015 | \n\ |
| 1016 | Maps length bytes from the file specified by the file descriptor fileno,\n\ |
| 1017 | and returns a mmap object. If length is 0, the maximum length of the map\n\ |
| 1018 | will be the current size of the file when mmap is called.\n\ |
| 1019 | flags specifies the nature of the mapping. MAP_PRIVATE creates a\n\ |
| 1020 | 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] | 1021 | 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] | 1022 | that's shared with all other processes mapping the same areas of the file.\n\ |
| 1023 | The default value is MAP_SHARED.\n\ |
| 1024 | \n\ |
| 1025 | To map anonymous memory, pass -1 as the fileno (both versions)."); |
| 1026 | |
| 1027 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1028 | static PyTypeObject mmap_object_type = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1029 | PyVarObject_HEAD_INIT(NULL, 0) |
| 1030 | "mmap.mmap", /* tp_name */ |
| 1031 | sizeof(mmap_object), /* tp_size */ |
| 1032 | 0, /* tp_itemsize */ |
| 1033 | /* methods */ |
| 1034 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 1035 | 0, /* tp_print */ |
| 1036 | 0, /* tp_getattr */ |
| 1037 | 0, /* tp_setattr */ |
| 1038 | 0, /* tp_reserved */ |
| 1039 | 0, /* tp_repr */ |
| 1040 | 0, /* tp_as_number */ |
| 1041 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 1042 | &mmap_as_mapping, /*tp_as_mapping*/ |
| 1043 | 0, /*tp_hash*/ |
| 1044 | 0, /*tp_call*/ |
| 1045 | 0, /*tp_str*/ |
| 1046 | PyObject_GenericGetAttr, /*tp_getattro*/ |
| 1047 | 0, /*tp_setattro*/ |
| 1048 | &mmap_as_buffer, /*tp_as_buffer*/ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1049 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1050 | mmap_doc, /*tp_doc*/ |
| 1051 | 0, /* tp_traverse */ |
| 1052 | 0, /* tp_clear */ |
| 1053 | 0, /* tp_richcompare */ |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1054 | offsetof(mmap_object, weakreflist), /* tp_weaklistoffset */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1055 | 0, /* tp_iter */ |
| 1056 | 0, /* tp_iternext */ |
| 1057 | mmap_object_methods, /* tp_methods */ |
| 1058 | 0, /* tp_members */ |
Georg Brandl | 0bccc18 | 2010-08-01 14:50:00 +0000 | [diff] [blame] | 1059 | mmap_object_getset, /* tp_getset */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1060 | 0, /* tp_base */ |
| 1061 | 0, /* tp_dict */ |
| 1062 | 0, /* tp_descr_get */ |
| 1063 | 0, /* tp_descr_set */ |
| 1064 | 0, /* tp_dictoffset */ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1065 | 0, /* tp_init */ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1066 | PyType_GenericAlloc, /* tp_alloc */ |
| 1067 | new_mmap_object, /* tp_new */ |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1068 | PyObject_Del, /* tp_free */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1069 | }; |
| 1070 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 1071 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 1072 | #ifdef UNIX |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1073 | #ifdef HAVE_LARGEFILE_SUPPORT |
| 1074 | #define _Py_PARSE_OFF_T "L" |
| 1075 | #else |
| 1076 | #define _Py_PARSE_OFF_T "l" |
| 1077 | #endif |
| 1078 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1079 | static PyObject * |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1080 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1081 | { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1082 | struct _Py_stat_struct status; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1083 | mmap_object *m_obj; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1084 | Py_ssize_t map_size; |
| 1085 | off_t offset = 0; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1086 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
| 1087 | int devzero = -1; |
| 1088 | int access = (int)ACCESS_DEFAULT; |
| 1089 | static char *keywords[] = {"fileno", "length", |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1090 | "flags", "prot", |
| 1091 | "access", "offset", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1092 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1093 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "in|iii" _Py_PARSE_OFF_T, keywords, |
| 1094 | &fd, &map_size, &flags, &prot, |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1095 | &access, &offset)) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1096 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1097 | if (map_size < 0) { |
| 1098 | PyErr_SetString(PyExc_OverflowError, |
| 1099 | "memory mapped length must be postiive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1100 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1101 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1102 | if (offset < 0) { |
| 1103 | PyErr_SetString(PyExc_OverflowError, |
| 1104 | "memory mapped offset must be positive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1105 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1106 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1107 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1108 | if ((access != (int)ACCESS_DEFAULT) && |
| 1109 | ((flags != MAP_SHARED) || (prot != (PROT_WRITE | PROT_READ)))) |
| 1110 | return PyErr_Format(PyExc_ValueError, |
| 1111 | "mmap can't specify both access and flags, prot."); |
| 1112 | switch ((access_mode)access) { |
| 1113 | case ACCESS_READ: |
| 1114 | flags = MAP_SHARED; |
| 1115 | prot = PROT_READ; |
| 1116 | break; |
| 1117 | case ACCESS_WRITE: |
| 1118 | flags = MAP_SHARED; |
| 1119 | prot = PROT_READ | PROT_WRITE; |
| 1120 | break; |
| 1121 | case ACCESS_COPY: |
| 1122 | flags = MAP_PRIVATE; |
| 1123 | prot = PROT_READ | PROT_WRITE; |
| 1124 | break; |
| 1125 | case ACCESS_DEFAULT: |
Antoine Pitrou | 16a0a0b | 2011-03-06 01:11:03 +0100 | [diff] [blame] | 1126 | /* map prot to access type */ |
| 1127 | if ((prot & PROT_READ) && (prot & PROT_WRITE)) { |
| 1128 | /* ACCESS_DEFAULT */ |
| 1129 | } |
| 1130 | else if (prot & PROT_WRITE) { |
| 1131 | access = ACCESS_WRITE; |
| 1132 | } |
| 1133 | else { |
| 1134 | access = ACCESS_READ; |
| 1135 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1136 | break; |
| 1137 | default: |
| 1138 | return PyErr_Format(PyExc_ValueError, |
| 1139 | "mmap invalid access parameter."); |
| 1140 | } |
Neal Norwitz | b567392 | 2002-09-05 21:48:07 +0000 | [diff] [blame] | 1141 | |
Victor Stinner | a6cd0cf | 2011-05-02 01:05:37 +0200 | [diff] [blame] | 1142 | #ifdef __APPLE__ |
| 1143 | /* Issue #11277: fsync(2) is not enough on OS X - a special, OS X specific |
| 1144 | fcntl(2) is necessary to force DISKSYNC and get around mmap(2) bug */ |
| 1145 | if (fd != -1) |
| 1146 | (void)fcntl(fd, F_FULLFSYNC); |
| 1147 | #endif |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1148 | if (fd != -1 && _Py_fstat_noraise(fd, &status) == 0 |
| 1149 | && S_ISREG(status.st_mode)) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1150 | if (map_size == 0) { |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1151 | if (status.st_size == 0) { |
Jesus Cea | 941bfcc | 2012-09-10 00:27:55 +0200 | [diff] [blame] | 1152 | PyErr_SetString(PyExc_ValueError, |
| 1153 | "cannot mmap an empty file"); |
| 1154 | return NULL; |
| 1155 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1156 | if (offset >= status.st_size) { |
Antoine Pitrou | 305bc9e | 2011-01-20 21:07:24 +0000 | [diff] [blame] | 1157 | PyErr_SetString(PyExc_ValueError, |
| 1158 | "mmap offset is greater than file size"); |
| 1159 | return NULL; |
| 1160 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1161 | if (status.st_size - offset > PY_SSIZE_T_MAX) { |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1162 | PyErr_SetString(PyExc_ValueError, |
| 1163 | "mmap length is too large"); |
Richard Oudkerk | 0d09ba8 | 2013-02-13 12:18:03 +0000 | [diff] [blame] | 1164 | return NULL; |
| 1165 | } |
Victor Stinner | e134a7f | 2015-03-30 10:09:31 +0200 | [diff] [blame] | 1166 | map_size = (Py_ssize_t) (status.st_size - offset); |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1167 | } else if (offset > status.st_size || status.st_size - offset < map_size) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1168 | PyErr_SetString(PyExc_ValueError, |
| 1169 | "mmap length is greater than file size"); |
| 1170 | return NULL; |
| 1171 | } |
| 1172 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1173 | m_obj = (mmap_object *)type->tp_alloc(type, 0); |
| 1174 | if (m_obj == NULL) {return NULL;} |
| 1175 | m_obj->data = NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1176 | m_obj->size = map_size; |
| 1177 | m_obj->pos = 0; |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1178 | m_obj->weakreflist = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1179 | m_obj->exports = 0; |
| 1180 | m_obj->offset = offset; |
| 1181 | if (fd == -1) { |
| 1182 | m_obj->fd = -1; |
| 1183 | /* Assume the caller wants to map anonymous memory. |
| 1184 | This is the same behaviour as Windows. mmap.mmap(-1, size) |
| 1185 | on both Windows and Unix map anonymous memory. |
| 1186 | */ |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1187 | #ifdef MAP_ANONYMOUS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1188 | /* BSD way to map anonymous memory */ |
| 1189 | flags |= MAP_ANONYMOUS; |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1190 | #else |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1191 | /* SVR4 method to map anonymous memory is to open /dev/zero */ |
Victor Stinner | daf4555 | 2013-08-28 00:53:59 +0200 | [diff] [blame] | 1192 | fd = devzero = _Py_open("/dev/zero", O_RDWR); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1193 | if (devzero == -1) { |
| 1194 | Py_DECREF(m_obj); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1195 | return NULL; |
| 1196 | } |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1197 | #endif |
Victor Stinner | daf4555 | 2013-08-28 00:53:59 +0200 | [diff] [blame] | 1198 | } |
| 1199 | else { |
| 1200 | m_obj->fd = _Py_dup(fd); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1201 | if (m_obj->fd == -1) { |
| 1202 | Py_DECREF(m_obj); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1203 | return NULL; |
| 1204 | } |
| 1205 | } |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1206 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1207 | m_obj->data = mmap(NULL, map_size, |
| 1208 | prot, flags, |
| 1209 | fd, offset); |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1210 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1211 | if (devzero != -1) { |
| 1212 | close(devzero); |
| 1213 | } |
| 1214 | |
| 1215 | if (m_obj->data == (char *)-1) { |
| 1216 | m_obj->data = NULL; |
| 1217 | Py_DECREF(m_obj); |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1218 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1219 | return NULL; |
| 1220 | } |
| 1221 | m_obj->access = (access_mode)access; |
| 1222 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1223 | } |
| 1224 | #endif /* UNIX */ |
| 1225 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 1226 | #ifdef MS_WINDOWS |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1227 | |
| 1228 | /* A note on sizes and offsets: while the actual map size must hold in a |
| 1229 | Py_ssize_t, both the total file size and the start offset can be longer |
| 1230 | than a Py_ssize_t, so we use PY_LONG_LONG which is always 64-bit. |
| 1231 | */ |
| 1232 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1233 | static PyObject * |
Georg Brandl | 86def6c | 2008-01-21 20:36:10 +0000 | [diff] [blame] | 1234 | new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1235 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1236 | mmap_object *m_obj; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1237 | Py_ssize_t map_size; |
| 1238 | PY_LONG_LONG offset = 0, size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1239 | DWORD off_hi; /* upper 32 bits of offset */ |
| 1240 | DWORD off_lo; /* lower 32 bits of offset */ |
| 1241 | DWORD size_hi; /* upper 32 bits of size */ |
| 1242 | DWORD size_lo; /* lower 32 bits of size */ |
| 1243 | char *tagname = ""; |
| 1244 | DWORD dwErr = 0; |
| 1245 | int fileno; |
| 1246 | HANDLE fh = 0; |
| 1247 | int access = (access_mode)ACCESS_DEFAULT; |
| 1248 | DWORD flProtect, dwDesiredAccess; |
| 1249 | static char *keywords[] = { "fileno", "length", |
Stefan Krah | 2318699 | 2012-03-06 15:37:36 +0100 | [diff] [blame] | 1250 | "tagname", |
| 1251 | "access", "offset", NULL }; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1252 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1253 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "in|ziL", keywords, |
| 1254 | &fileno, &map_size, |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1255 | &tagname, &access, &offset)) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1256 | return NULL; |
| 1257 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1258 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1259 | switch((access_mode)access) { |
| 1260 | case ACCESS_READ: |
| 1261 | flProtect = PAGE_READONLY; |
| 1262 | dwDesiredAccess = FILE_MAP_READ; |
| 1263 | break; |
| 1264 | case ACCESS_DEFAULT: case ACCESS_WRITE: |
| 1265 | flProtect = PAGE_READWRITE; |
| 1266 | dwDesiredAccess = FILE_MAP_WRITE; |
| 1267 | break; |
| 1268 | case ACCESS_COPY: |
| 1269 | flProtect = PAGE_WRITECOPY; |
| 1270 | dwDesiredAccess = FILE_MAP_COPY; |
| 1271 | break; |
| 1272 | default: |
| 1273 | return PyErr_Format(PyExc_ValueError, |
| 1274 | "mmap invalid access parameter."); |
| 1275 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1276 | |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1277 | if (map_size < 0) { |
| 1278 | PyErr_SetString(PyExc_OverflowError, |
| 1279 | "memory mapped length must be postiive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1280 | return NULL; |
Benjamin Peterson | cd04db0 | 2016-10-05 21:45:48 -0700 | [diff] [blame] | 1281 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1282 | if (offset < 0) { |
| 1283 | PyErr_SetString(PyExc_OverflowError, |
| 1284 | "memory mapped offset must be positive"); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1285 | return NULL; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1286 | } |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 1287 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1288 | /* assume -1 and 0 both mean invalid filedescriptor |
| 1289 | to 'anonymously' map memory. |
| 1290 | XXX: fileno == 0 is a valid fd, but was accepted prior to 2.5. |
| 1291 | XXX: Should this code be added? |
| 1292 | if (fileno == 0) |
| 1293 | PyErr_WarnEx(PyExc_DeprecationWarning, |
| 1294 | "don't use 0 for anonymous memory", |
| 1295 | 1); |
| 1296 | */ |
| 1297 | if (fileno != -1 && fileno != 0) { |
Brian Curtin | ea47eaa | 2010-08-01 15:26:26 +0000 | [diff] [blame] | 1298 | /* Ensure that fileno is within the CRT's valid range */ |
Steve Dower | 8fc8980 | 2015-04-12 00:26:27 -0400 | [diff] [blame] | 1299 | if (!_PyVerify_fd(fileno)) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1300 | PyErr_SetFromErrno(PyExc_OSError); |
Brian Curtin | ea47eaa | 2010-08-01 15:26:26 +0000 | [diff] [blame] | 1301 | return NULL; |
| 1302 | } |
Steve Dower | 8fc8980 | 2015-04-12 00:26:27 -0400 | [diff] [blame] | 1303 | _Py_BEGIN_SUPPRESS_IPH |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1304 | fh = (HANDLE)_get_osfhandle(fileno); |
Steve Dower | 8fc8980 | 2015-04-12 00:26:27 -0400 | [diff] [blame] | 1305 | _Py_END_SUPPRESS_IPH |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1306 | if (fh==(HANDLE)-1) { |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1307 | PyErr_SetFromErrno(PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1308 | return NULL; |
| 1309 | } |
| 1310 | /* Win9x appears to need us seeked to zero */ |
| 1311 | lseek(fileno, 0, SEEK_SET); |
| 1312 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1313 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1314 | m_obj = (mmap_object *)type->tp_alloc(type, 0); |
| 1315 | if (m_obj == NULL) |
| 1316 | return NULL; |
| 1317 | /* Set every field to an invalid marker, so we can safely |
| 1318 | destruct the object in the face of failure */ |
| 1319 | m_obj->data = NULL; |
| 1320 | m_obj->file_handle = INVALID_HANDLE_VALUE; |
| 1321 | m_obj->map_handle = NULL; |
| 1322 | m_obj->tagname = NULL; |
| 1323 | m_obj->offset = offset; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1324 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1325 | if (fh) { |
| 1326 | /* It is necessary to duplicate the handle, so the |
| 1327 | Python code can close it on us */ |
| 1328 | if (!DuplicateHandle( |
| 1329 | GetCurrentProcess(), /* source process handle */ |
| 1330 | fh, /* handle to be duplicated */ |
| 1331 | GetCurrentProcess(), /* target proc handle */ |
| 1332 | (LPHANDLE)&m_obj->file_handle, /* result */ |
| 1333 | 0, /* access - ignored due to options value */ |
| 1334 | FALSE, /* inherited by child processes? */ |
| 1335 | DUPLICATE_SAME_ACCESS)) { /* options */ |
| 1336 | dwErr = GetLastError(); |
| 1337 | Py_DECREF(m_obj); |
| 1338 | PyErr_SetFromWindowsErr(dwErr); |
| 1339 | return NULL; |
| 1340 | } |
| 1341 | if (!map_size) { |
| 1342 | DWORD low,high; |
| 1343 | low = GetFileSize(fh, &high); |
| 1344 | /* low might just happen to have the value INVALID_FILE_SIZE; |
| 1345 | so we need to check the last error also. */ |
| 1346 | if (low == INVALID_FILE_SIZE && |
| 1347 | (dwErr = GetLastError()) != NO_ERROR) { |
| 1348 | Py_DECREF(m_obj); |
| 1349 | return PyErr_SetFromWindowsErr(dwErr); |
| 1350 | } |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 1351 | |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1352 | size = (((PY_LONG_LONG) high) << 32) + low; |
Jesus Cea | 1f2799b | 2012-09-10 22:49:50 +0200 | [diff] [blame] | 1353 | if (size == 0) { |
| 1354 | PyErr_SetString(PyExc_ValueError, |
| 1355 | "cannot mmap an empty file"); |
Jesus Cea | e8db356 | 2012-09-10 22:58:07 +0200 | [diff] [blame] | 1356 | Py_DECREF(m_obj); |
Jesus Cea | 1f2799b | 2012-09-10 22:49:50 +0200 | [diff] [blame] | 1357 | return NULL; |
| 1358 | } |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1359 | if (offset >= size) { |
Antoine Pitrou | 305bc9e | 2011-01-20 21:07:24 +0000 | [diff] [blame] | 1360 | PyErr_SetString(PyExc_ValueError, |
| 1361 | "mmap offset is greater than file size"); |
| 1362 | Py_DECREF(m_obj); |
| 1363 | return NULL; |
| 1364 | } |
Richard Oudkerk | 0d09ba8 | 2013-02-13 12:18:03 +0000 | [diff] [blame] | 1365 | if (size - offset > PY_SSIZE_T_MAX) { |
| 1366 | PyErr_SetString(PyExc_ValueError, |
| 1367 | "mmap length is too large"); |
| 1368 | Py_DECREF(m_obj); |
| 1369 | return NULL; |
| 1370 | } |
| 1371 | m_obj->size = (Py_ssize_t) (size - offset); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 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 | } |
| 1376 | } |
| 1377 | else { |
| 1378 | m_obj->size = map_size; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1379 | size = offset + map_size; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1380 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1381 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1382 | /* set the initial position */ |
| 1383 | m_obj->pos = (size_t) 0; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1384 | |
Antoine Pitrou | c53204b | 2013-08-05 23:17:30 +0200 | [diff] [blame] | 1385 | m_obj->weakreflist = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1386 | m_obj->exports = 0; |
| 1387 | /* set the tag name */ |
| 1388 | if (tagname != NULL && *tagname != '\0') { |
| 1389 | m_obj->tagname = PyMem_Malloc(strlen(tagname)+1); |
| 1390 | if (m_obj->tagname == NULL) { |
| 1391 | PyErr_NoMemory(); |
| 1392 | Py_DECREF(m_obj); |
| 1393 | return NULL; |
| 1394 | } |
| 1395 | strcpy(m_obj->tagname, tagname); |
| 1396 | } |
| 1397 | else |
| 1398 | m_obj->tagname = NULL; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1399 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1400 | m_obj->access = (access_mode)access; |
Antoine Pitrou | 97696cb | 2011-02-21 23:46:27 +0000 | [diff] [blame] | 1401 | size_hi = (DWORD)(size >> 32); |
| 1402 | size_lo = (DWORD)(size & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1403 | off_hi = (DWORD)(offset >> 32); |
| 1404 | off_lo = (DWORD)(offset & 0xFFFFFFFF); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1405 | /* For files, it would be sufficient to pass 0 as size. |
| 1406 | For anonymous maps, we have to pass the size explicitly. */ |
| 1407 | m_obj->map_handle = CreateFileMapping(m_obj->file_handle, |
| 1408 | NULL, |
| 1409 | flProtect, |
| 1410 | size_hi, |
| 1411 | size_lo, |
| 1412 | m_obj->tagname); |
| 1413 | if (m_obj->map_handle != NULL) { |
| 1414 | m_obj->data = (char *) MapViewOfFile(m_obj->map_handle, |
| 1415 | dwDesiredAccess, |
| 1416 | off_hi, |
| 1417 | off_lo, |
| 1418 | m_obj->size); |
| 1419 | if (m_obj->data != NULL) |
| 1420 | return (PyObject *)m_obj; |
| 1421 | else { |
| 1422 | dwErr = GetLastError(); |
| 1423 | CloseHandle(m_obj->map_handle); |
| 1424 | m_obj->map_handle = NULL; |
| 1425 | } |
| 1426 | } else |
| 1427 | dwErr = GetLastError(); |
| 1428 | Py_DECREF(m_obj); |
| 1429 | PyErr_SetFromWindowsErr(dwErr); |
| 1430 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1431 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 1432 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1433 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1434 | static void |
| 1435 | setint(PyObject *d, const char *name, long value) |
| 1436 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1437 | PyObject *o = PyLong_FromLong(value); |
| 1438 | if (o && PyDict_SetItemString(d, name, o) == 0) { |
| 1439 | Py_DECREF(o); |
| 1440 | } |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1441 | } |
| 1442 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1443 | |
| 1444 | static struct PyModuleDef mmapmodule = { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1445 | PyModuleDef_HEAD_INIT, |
| 1446 | "mmap", |
| 1447 | NULL, |
| 1448 | -1, |
| 1449 | NULL, |
| 1450 | NULL, |
| 1451 | NULL, |
| 1452 | NULL, |
| 1453 | NULL |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1454 | }; |
| 1455 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 1456 | PyMODINIT_FUNC |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 1457 | PyInit_mmap(void) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1458 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1459 | PyObject *dict, *module; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1460 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1461 | if (PyType_Ready(&mmap_object_type) < 0) |
| 1462 | return NULL; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1463 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1464 | module = PyModule_Create(&mmapmodule); |
| 1465 | if (module == NULL) |
| 1466 | return NULL; |
| 1467 | dict = PyModule_GetDict(module); |
| 1468 | if (!dict) |
| 1469 | return NULL; |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1470 | PyDict_SetItemString(dict, "error", PyExc_OSError); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1471 | PyDict_SetItemString(dict, "mmap", (PyObject*) &mmap_object_type); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1472 | #ifdef PROT_EXEC |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1473 | setint(dict, "PROT_EXEC", PROT_EXEC); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1474 | #endif |
| 1475 | #ifdef PROT_READ |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1476 | setint(dict, "PROT_READ", PROT_READ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1477 | #endif |
| 1478 | #ifdef PROT_WRITE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1479 | setint(dict, "PROT_WRITE", PROT_WRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1480 | #endif |
| 1481 | |
| 1482 | #ifdef MAP_SHARED |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1483 | setint(dict, "MAP_SHARED", MAP_SHARED); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1484 | #endif |
| 1485 | #ifdef MAP_PRIVATE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1486 | setint(dict, "MAP_PRIVATE", MAP_PRIVATE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1487 | #endif |
| 1488 | #ifdef MAP_DENYWRITE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1489 | setint(dict, "MAP_DENYWRITE", MAP_DENYWRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1490 | #endif |
| 1491 | #ifdef MAP_EXECUTABLE |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1492 | setint(dict, "MAP_EXECUTABLE", MAP_EXECUTABLE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1493 | #endif |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1494 | #ifdef MAP_ANONYMOUS |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1495 | setint(dict, "MAP_ANON", MAP_ANONYMOUS); |
| 1496 | setint(dict, "MAP_ANONYMOUS", MAP_ANONYMOUS); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1497 | #endif |
| 1498 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1499 | setint(dict, "PAGESIZE", (long)my_getpagesize()); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 1500 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1501 | setint(dict, "ALLOCATIONGRANULARITY", (long)my_getallocationgranularity()); |
Guido van Rossum | 8ce8a78 | 2007-11-01 19:42:39 +0000 | [diff] [blame] | 1502 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1503 | setint(dict, "ACCESS_READ", ACCESS_READ); |
| 1504 | setint(dict, "ACCESS_WRITE", ACCESS_WRITE); |
| 1505 | setint(dict, "ACCESS_COPY", ACCESS_COPY); |
| 1506 | return module; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1507 | } |