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 | |
| 6 | / mmapmodule.cpp -- map a view of a file into memory |
| 7 | / |
| 8 | / todo: need permission flags, perhaps a 'chsize' analog |
| 9 | / not all functions check range yet!!! |
| 10 | / |
| 11 | / |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 12 | / This version of mmapmodule.c has been changed significantly |
| 13 | / from the original mmapfile.c on which it was based. |
| 14 | / The original version of mmapfile is maintained by Sam at |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 15 | / ftp://squirl.nightmare.com/pub/python/python-ext. |
| 16 | */ |
| 17 | |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 18 | #define PY_SSIZE_T_CLEAN |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 19 | #include <Python.h> |
| 20 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 21 | #ifndef MS_WINDOWS |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 22 | #define UNIX |
| 23 | #endif |
| 24 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 25 | #ifdef MS_WINDOWS |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 26 | #include <windows.h> |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 27 | static int |
| 28 | my_getpagesize(void) |
| 29 | { |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 30 | SYSTEM_INFO si; |
| 31 | GetSystemInfo(&si); |
| 32 | return si.dwPageSize; |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 33 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 34 | #endif |
| 35 | |
| 36 | #ifdef UNIX |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 37 | #include <sys/mman.h> |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 38 | #include <sys/stat.h> |
Guido van Rossum | 4b36e6b | 2000-09-25 13:16:15 +0000 | [diff] [blame] | 39 | |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 40 | #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) |
| 41 | static int |
| 42 | my_getpagesize(void) |
| 43 | { |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 44 | return sysconf(_SC_PAGESIZE); |
Fred Drake | 145f96e | 2000-10-01 17:50:46 +0000 | [diff] [blame] | 45 | } |
| 46 | #else |
| 47 | #define my_getpagesize getpagesize |
| 48 | #endif |
| 49 | |
Guido van Rossum | 4b36e6b | 2000-09-25 13:16:15 +0000 | [diff] [blame] | 50 | #endif /* UNIX */ |
| 51 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 52 | #include <string.h> |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 53 | |
| 54 | #ifdef HAVE_SYS_TYPES_H |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 55 | #include <sys/types.h> |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 56 | #endif /* HAVE_SYS_TYPES_H */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 57 | |
Neal Norwitz | 3eaf2b5 | 2006-02-16 08:08:54 +0000 | [diff] [blame] | 58 | /* Prefer MAP_ANONYMOUS since MAP_ANON is deprecated according to man page. */ |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 59 | #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) |
| 60 | # define MAP_ANONYMOUS MAP_ANON |
| 61 | #endif |
| 62 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 63 | static PyObject *mmap_module_error; |
| 64 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 65 | typedef enum |
| 66 | { |
| 67 | ACCESS_DEFAULT, |
| 68 | ACCESS_READ, |
| 69 | ACCESS_WRITE, |
| 70 | ACCESS_COPY |
| 71 | } access_mode; |
| 72 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 73 | typedef struct { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 74 | PyObject_HEAD |
| 75 | char * data; |
| 76 | size_t size; |
| 77 | size_t pos; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 78 | int exports; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 79 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 80 | #ifdef MS_WINDOWS |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 81 | HANDLE map_handle; |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 82 | HANDLE file_handle; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 83 | char * tagname; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 84 | #endif |
| 85 | |
| 86 | #ifdef UNIX |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 87 | int fd; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 88 | #endif |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 89 | |
| 90 | access_mode access; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 91 | } mmap_object; |
| 92 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 93 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 94 | static void |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 95 | mmap_object_dealloc(mmap_object *m_obj) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 96 | { |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 97 | #ifdef MS_WINDOWS |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 98 | if (m_obj->data != NULL) |
| 99 | UnmapViewOfFile (m_obj->data); |
| 100 | if (m_obj->map_handle != INVALID_HANDLE_VALUE) |
| 101 | CloseHandle (m_obj->map_handle); |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 102 | if (m_obj->file_handle != INVALID_HANDLE_VALUE) |
| 103 | CloseHandle (m_obj->file_handle); |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 104 | if (m_obj->tagname) |
| 105 | PyMem_Free(m_obj->tagname); |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 106 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 107 | |
| 108 | #ifdef UNIX |
Neal Norwitz | 6eac200 | 2005-11-02 05:36:37 +0000 | [diff] [blame] | 109 | if (m_obj->fd >= 0) |
| 110 | (void) close(m_obj->fd); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 111 | if (m_obj->data!=NULL) { |
Andrew M. Kuchling | 9bc5f33 | 2000-06-18 04:25:08 +0000 | [diff] [blame] | 112 | msync(m_obj->data, m_obj->size, MS_SYNC); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 113 | munmap(m_obj->data, m_obj->size); |
| 114 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 115 | #endif /* UNIX */ |
| 116 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 117 | PyObject_Del(m_obj); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static PyObject * |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 121 | mmap_close_method(mmap_object *self, PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 122 | { |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 123 | if (self->exports > 0) { |
| 124 | PyErr_SetString(PyExc_BufferError, "cannot close "\ |
| 125 | "exported pointers exist"); |
| 126 | return NULL; |
| 127 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 128 | #ifdef MS_WINDOWS |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 129 | /* For each resource we maintain, we need to check |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 130 | the value is valid, and if so, free the resource |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 131 | and set the member value to an invalid value so |
| 132 | the dealloc does not attempt to resource clearing |
| 133 | again. |
| 134 | TODO - should we check for errors in the close operations??? |
| 135 | */ |
| 136 | if (self->data != NULL) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 137 | UnmapViewOfFile(self->data); |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 138 | self->data = NULL; |
| 139 | } |
| 140 | if (self->map_handle != INVALID_HANDLE_VALUE) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 141 | CloseHandle(self->map_handle); |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 142 | self->map_handle = INVALID_HANDLE_VALUE; |
| 143 | } |
| 144 | if (self->file_handle != INVALID_HANDLE_VALUE) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 145 | CloseHandle(self->file_handle); |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 146 | self->file_handle = INVALID_HANDLE_VALUE; |
| 147 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 148 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 149 | |
| 150 | #ifdef UNIX |
Neal Norwitz | 6eac200 | 2005-11-02 05:36:37 +0000 | [diff] [blame] | 151 | (void) close(self->fd); |
| 152 | self->fd = -1; |
Neal Norwitz | e604c02 | 2003-01-10 20:52:16 +0000 | [diff] [blame] | 153 | if (self->data != NULL) { |
| 154 | munmap(self->data, self->size); |
| 155 | self->data = NULL; |
| 156 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 157 | #endif |
| 158 | |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 159 | Py_INCREF(Py_None); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 160 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 163 | #ifdef MS_WINDOWS |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 164 | #define CHECK_VALID(err) \ |
| 165 | do { \ |
Guido van Rossum | 69c2b88 | 2003-04-09 19:31:02 +0000 | [diff] [blame] | 166 | if (self->map_handle == INVALID_HANDLE_VALUE) { \ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 167 | PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 168 | return err; \ |
| 169 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 170 | } while (0) |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 171 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 172 | |
| 173 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 174 | #define CHECK_VALID(err) \ |
| 175 | do { \ |
| 176 | if (self->data == NULL) { \ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 177 | PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 178 | return err; \ |
| 179 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 180 | } while (0) |
| 181 | #endif /* UNIX */ |
| 182 | |
| 183 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 184 | mmap_read_byte_method(mmap_object *self, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 185 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 186 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 187 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 188 | if (self->pos < self->size) { |
Tim Peters | d6283b8 | 2001-05-09 18:48:26 +0000 | [diff] [blame] | 189 | char value = self->data[self->pos]; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 190 | self->pos += 1; |
Tim Peters | d6283b8 | 2001-05-09 18:48:26 +0000 | [diff] [blame] | 191 | return Py_BuildValue("c", value); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 192 | } else { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 193 | PyErr_SetString(PyExc_ValueError, "read byte out of range"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 194 | return NULL; |
| 195 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 199 | mmap_read_line_method(mmap_object *self, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 200 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 201 | { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 202 | char *start = self->data+self->pos; |
| 203 | char *eof = self->data+self->size; |
| 204 | char *eol; |
| 205 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 206 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 207 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 208 | |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 209 | eol = memchr(start, '\n', self->size - self->pos); |
| 210 | if (!eol) |
| 211 | eol = eof; |
| 212 | else |
| 213 | ++eol; /* we're interested in the position after the |
| 214 | newline. */ |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 215 | result = PyBytes_FromStringAndSize(start, (eol - start)); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 216 | self->pos += (eol - start); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 217 | return result; |
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_method(mmap_object *self, |
| 222 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 223 | { |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 224 | Py_ssize_t num_bytes; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 225 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 226 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 227 | CHECK_VALID(NULL); |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 228 | if (!PyArg_ParseTuple(args, "n:read", &num_bytes)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 229 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 230 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 231 | /* silently 'adjust' out-of-range requests */ |
| 232 | if ((self->pos + num_bytes) > self->size) { |
| 233 | num_bytes -= (self->pos+num_bytes) - self->size; |
| 234 | } |
Guido van Rossum | e5aeaad | 2007-07-26 18:28:23 +0000 | [diff] [blame] | 235 | result = PyBytes_FromStringAndSize(self->data+self->pos, num_bytes); |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 236 | self->pos += num_bytes; |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 237 | return result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 241 | mmap_find_method(mmap_object *self, |
| 242 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 243 | { |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 244 | Py_ssize_t start = self->pos; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 245 | char *needle; |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 246 | Py_ssize_t len; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 247 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 248 | CHECK_VALID(NULL); |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 249 | if (!PyArg_ParseTuple(args, "s#|n:find", &needle, &len, &start)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 250 | return NULL; |
| 251 | } else { |
Greg Stein | 834f4dd | 2001-05-14 09:32:26 +0000 | [diff] [blame] | 252 | char *p; |
| 253 | char *e = self->data + self->size; |
| 254 | |
| 255 | if (start < 0) |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 256 | start += self->size; |
Greg Stein | 834f4dd | 2001-05-14 09:32:26 +0000 | [diff] [blame] | 257 | if (start < 0) |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 258 | start = 0; |
Tim Peters | d401edd | 2001-05-14 23:19:12 +0000 | [diff] [blame] | 259 | else if ((size_t)start > self->size) |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 260 | start = self->size; |
Greg Stein | 834f4dd | 2001-05-14 09:32:26 +0000 | [diff] [blame] | 261 | |
Tim Peters | c9ffa06 | 2002-03-08 05:43:32 +0000 | [diff] [blame] | 262 | for (p = self->data + start; p + len <= e; ++p) { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 263 | Py_ssize_t i; |
Tim Peters | c9ffa06 | 2002-03-08 05:43:32 +0000 | [diff] [blame] | 264 | for (i = 0; i < len && needle[i] == p[i]; ++i) |
| 265 | /* nothing */; |
| 266 | if (i == len) { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 267 | return PyInt_FromSsize_t(p - self->data); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 268 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 269 | } |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 270 | return PyInt_FromLong(-1); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 271 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 272 | } |
| 273 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 274 | static int |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 275 | is_writeable(mmap_object *self) |
| 276 | { |
| 277 | if (self->access != ACCESS_READ) |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 278 | return 1; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 279 | PyErr_Format(PyExc_TypeError, "mmap can't modify a readonly memory map."); |
| 280 | return 0; |
| 281 | } |
| 282 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 283 | static int |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 284 | is_resizeable(mmap_object *self) |
| 285 | { |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 286 | if (self->exports > 0) { |
| 287 | PyErr_SetString(PyExc_BufferError, |
| 288 | "mmap can't resize with extant buffers exported."); |
| 289 | return 0; |
| 290 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 291 | if ((self->access == ACCESS_WRITE) || (self->access == ACCESS_DEFAULT)) |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 292 | return 1; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 293 | PyErr_Format(PyExc_TypeError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 294 | "mmap can't resize a readonly or copy-on-write memory map."); |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 299 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 300 | mmap_write_method(mmap_object *self, |
| 301 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 302 | { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 303 | Py_ssize_t length; |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 304 | char *data; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 305 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 306 | CHECK_VALID(NULL); |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 307 | if (!PyArg_ParseTuple(args, "s#:write", &data, &length)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 308 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 309 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 310 | if (!is_writeable(self)) |
| 311 | return NULL; |
| 312 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 313 | if ((self->pos + length) > self->size) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 314 | PyErr_SetString(PyExc_ValueError, "data out of range"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 315 | return NULL; |
| 316 | } |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 317 | memcpy(self->data+self->pos, data, length); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 318 | self->pos = self->pos+length; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 319 | Py_INCREF(Py_None); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 320 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 324 | mmap_write_byte_method(mmap_object *self, |
| 325 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 326 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 327 | char value; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 328 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 329 | CHECK_VALID(NULL); |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 330 | if (!PyArg_ParseTuple(args, "c:write_byte", &value)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 331 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 332 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 333 | if (!is_writeable(self)) |
| 334 | return NULL; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 335 | *(self->data+self->pos) = value; |
| 336 | self->pos += 1; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 337 | Py_INCREF(Py_None); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 338 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 339 | } |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 340 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 341 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 342 | mmap_size_method(mmap_object *self, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 343 | PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 344 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 345 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 346 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 347 | #ifdef MS_WINDOWS |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 348 | if (self->file_handle != INVALID_HANDLE_VALUE) { |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 349 | DWORD low,high; |
| 350 | PY_LONG_LONG size; |
| 351 | low = GetFileSize(self->file_handle, &high); |
| 352 | if (low == INVALID_FILE_SIZE) { |
| 353 | /* It might be that the function appears to have failed, |
| 354 | when indeed its size equals INVALID_FILE_SIZE */ |
| 355 | DWORD error = GetLastError(); |
| 356 | if (error != NO_ERROR) |
| 357 | return PyErr_SetFromWindowsErr(error); |
| 358 | } |
| 359 | if (!high && low < LONG_MAX) |
| 360 | return PyInt_FromLong((long)low); |
| 361 | size = (((PY_LONG_LONG)high)<<32) + low; |
| 362 | return PyLong_FromLongLong(size); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 363 | } else { |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 364 | return PyInt_FromSsize_t(self->size); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 365 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 366 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 367 | |
| 368 | #ifdef UNIX |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 369 | { |
| 370 | struct stat buf; |
| 371 | if (-1 == fstat(self->fd, &buf)) { |
| 372 | PyErr_SetFromErrno(mmap_module_error); |
| 373 | return NULL; |
| 374 | } |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 375 | return PyInt_FromSsize_t(buf.st_size); |
Andrew M. Kuchling | 7b9fb92 | 2000-06-17 22:41:22 +0000 | [diff] [blame] | 376 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 377 | #endif /* UNIX */ |
| 378 | } |
| 379 | |
| 380 | /* This assumes that you want the entire file mapped, |
| 381 | / and when recreating the map will make the new file |
| 382 | / have the new size |
| 383 | / |
| 384 | / Is this really necessary? This could easily be done |
| 385 | / from python by just closing and re-opening with the |
| 386 | / new size? |
| 387 | */ |
| 388 | |
| 389 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 390 | mmap_resize_method(mmap_object *self, |
| 391 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 392 | { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 393 | Py_ssize_t new_size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 394 | CHECK_VALID(NULL); |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 395 | if (!PyArg_ParseTuple(args, "n:resize", &new_size) || |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 396 | !is_resizeable(self)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 397 | return NULL; |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 398 | #ifdef MS_WINDOWS |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 399 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 400 | DWORD dwErrCode = 0; |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 401 | DWORD newSizeLow, newSizeHigh; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 402 | /* First, unmap the file view */ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 403 | UnmapViewOfFile(self->data); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 404 | /* Close the mapping object */ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 405 | CloseHandle(self->map_handle); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 406 | /* Move to the desired EOF position */ |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 407 | #if SIZEOF_SIZE_T > 4 |
| 408 | newSizeHigh = (DWORD)(new_size >> 32); |
| 409 | newSizeLow = (DWORD)(new_size & 0xFFFFFFFF); |
| 410 | #else |
| 411 | newSizeHigh = 0; |
Martin v. Löwis | 5bb8a15 | 2006-02-18 12:49:49 +0000 | [diff] [blame] | 412 | newSizeLow = (DWORD)new_size; |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 413 | #endif |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 414 | SetFilePointer(self->file_handle, |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 415 | newSizeLow, &newSizeHigh, FILE_BEGIN); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 416 | /* Change the size of the file */ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 417 | SetEndOfFile(self->file_handle); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 418 | /* Create another mapping object and remap the file view */ |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 419 | self->map_handle = CreateFileMapping( |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 420 | self->file_handle, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 421 | NULL, |
| 422 | PAGE_READWRITE, |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 423 | newSizeHigh, |
| 424 | newSizeLow, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 425 | self->tagname); |
| 426 | if (self->map_handle != NULL) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 427 | self->data = (char *) MapViewOfFile(self->map_handle, |
| 428 | FILE_MAP_WRITE, |
| 429 | 0, |
| 430 | 0, |
| 431 | 0); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 432 | if (self->data != NULL) { |
| 433 | self->size = new_size; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 434 | Py_INCREF(Py_None); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 435 | return Py_None; |
| 436 | } else { |
| 437 | dwErrCode = GetLastError(); |
| 438 | } |
| 439 | } else { |
| 440 | dwErrCode = GetLastError(); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 441 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 442 | PyErr_SetFromWindowsErr(dwErrCode); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 443 | return NULL; |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 444 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 445 | |
| 446 | #ifdef UNIX |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 447 | #ifndef HAVE_MREMAP |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 448 | } else { |
| 449 | PyErr_SetString(PyExc_SystemError, |
| 450 | "mmap: resizing not available--no mremap()"); |
| 451 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 452 | #else |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 453 | } else { |
Armin Rigo | 335ffe8 | 2005-09-20 19:04:02 +0000 | [diff] [blame] | 454 | void *newmap; |
| 455 | |
Georg Brandl | 38387b8 | 2005-08-24 07:17:40 +0000 | [diff] [blame] | 456 | if (ftruncate(self->fd, new_size) == -1) { |
| 457 | PyErr_SetFromErrno(mmap_module_error); |
| 458 | return NULL; |
| 459 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 460 | |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 461 | #ifdef MREMAP_MAYMOVE |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 462 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 463 | #else |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 464 | newmap = mremap(self->data, self->size, new_size, 0); |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 465 | #endif |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 466 | if (newmap == (void *)-1) |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 467 | { |
| 468 | PyErr_SetFromErrno(mmap_module_error); |
| 469 | return NULL; |
| 470 | } |
| 471 | self->data = newmap; |
| 472 | self->size = new_size; |
| 473 | Py_INCREF(Py_None); |
| 474 | return Py_None; |
Andrew M. Kuchling | 6fef30e | 2000-06-18 14:51:21 +0000 | [diff] [blame] | 475 | #endif /* HAVE_MREMAP */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 476 | #endif /* UNIX */ |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 477 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | static PyObject * |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 481 | mmap_tell_method(mmap_object *self, PyObject *unused) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 482 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 483 | CHECK_VALID(NULL); |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 484 | return PyInt_FromSize_t(self->pos); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 488 | mmap_flush_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 489 | { |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 490 | Py_ssize_t offset = 0; |
| 491 | Py_ssize_t size = self->size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 492 | CHECK_VALID(NULL); |
Tim Peters | f288295 | 2006-02-17 01:07:39 +0000 | [diff] [blame] | 493 | if (!PyArg_ParseTuple(args, "|nn:flush", &offset, &size)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 494 | return NULL; |
Tim Peters | f288295 | 2006-02-17 01:07:39 +0000 | [diff] [blame] | 495 | if ((size_t)(offset + size) > self->size) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 496 | PyErr_SetString(PyExc_ValueError, "flush values out of range"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 497 | return NULL; |
| 498 | } else { |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 499 | #ifdef MS_WINDOWS |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 500 | return PyInt_FromLong((long) |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 501 | FlushViewOfFile(self->data+offset, size)); |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 502 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 503 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 504 | /* XXX semantics of return value? */ |
| 505 | /* XXX flags for msync? */ |
| 506 | if (-1 == msync(self->data + offset, size, |
Andrew M. Kuchling | 9bc5f33 | 2000-06-18 04:25:08 +0000 | [diff] [blame] | 507 | MS_SYNC)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 508 | { |
| 509 | PyErr_SetFromErrno(mmap_module_error); |
| 510 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 511 | } |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 512 | return PyInt_FromLong(0); |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 513 | #endif /* UNIX */ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 514 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 518 | mmap_seek_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 519 | { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 520 | Py_ssize_t dist; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 521 | int how=0; |
| 522 | CHECK_VALID(NULL); |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 523 | if (!PyArg_ParseTuple(args, "n|i:seek", &dist, &how)) |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 524 | return NULL; |
| 525 | else { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 526 | size_t where; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 527 | switch (how) { |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 528 | case 0: /* relative to start */ |
| 529 | if (dist < 0) |
| 530 | goto onoutofrange; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 531 | where = dist; |
| 532 | break; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 533 | case 1: /* relative to current position */ |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 534 | if ((Py_ssize_t)self->pos + dist < 0) |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 535 | goto onoutofrange; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 536 | where = self->pos + dist; |
| 537 | break; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 538 | case 2: /* relative to end */ |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 539 | if ((Py_ssize_t)self->size + dist < 0) |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 540 | goto onoutofrange; |
| 541 | where = self->size + dist; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 542 | break; |
| 543 | default: |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 544 | PyErr_SetString(PyExc_ValueError, "unknown seek type"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 545 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 546 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 547 | if (where > self->size) |
| 548 | goto onoutofrange; |
| 549 | self->pos = where; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 550 | Py_INCREF(Py_None); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 551 | return Py_None; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 552 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 553 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 554 | onoutofrange: |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 555 | PyErr_SetString(PyExc_ValueError, "seek out of range"); |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 556 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 560 | mmap_move_method(mmap_object *self, PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 561 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 562 | unsigned long dest, src, count; |
| 563 | CHECK_VALID(NULL); |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 564 | if (!PyArg_ParseTuple(args, "kkk:move", &dest, &src, &count) || |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 565 | !is_writeable(self)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 566 | return NULL; |
| 567 | } else { |
| 568 | /* bounds check the values */ |
| 569 | if (/* end of source after end of data?? */ |
| 570 | ((src+count) > self->size) |
| 571 | /* dest will fit? */ |
| 572 | || (dest+count > self->size)) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 573 | PyErr_SetString(PyExc_ValueError, |
| 574 | "source or destination out of range"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 575 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 576 | } else { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 577 | memmove(self->data+dest, self->data+src, count); |
| 578 | Py_INCREF(Py_None); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 579 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 580 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 581 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | static struct PyMethodDef mmap_object_methods[] = { |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 585 | {"close", (PyCFunction) mmap_close_method, METH_NOARGS}, |
Martin v. Löwis | 43b936d | 2002-01-17 23:15:58 +0000 | [diff] [blame] | 586 | {"find", (PyCFunction) mmap_find_method, METH_VARARGS}, |
| 587 | {"flush", (PyCFunction) mmap_flush_method, METH_VARARGS}, |
| 588 | {"move", (PyCFunction) mmap_move_method, METH_VARARGS}, |
| 589 | {"read", (PyCFunction) mmap_read_method, METH_VARARGS}, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 590 | {"read_byte", (PyCFunction) mmap_read_byte_method, METH_NOARGS}, |
| 591 | {"readline", (PyCFunction) mmap_read_line_method, METH_NOARGS}, |
Martin v. Löwis | 43b936d | 2002-01-17 23:15:58 +0000 | [diff] [blame] | 592 | {"resize", (PyCFunction) mmap_resize_method, METH_VARARGS}, |
| 593 | {"seek", (PyCFunction) mmap_seek_method, METH_VARARGS}, |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 594 | {"size", (PyCFunction) mmap_size_method, METH_NOARGS}, |
| 595 | {"tell", (PyCFunction) mmap_tell_method, METH_NOARGS}, |
Martin v. Löwis | 43b936d | 2002-01-17 23:15:58 +0000 | [diff] [blame] | 596 | {"write", (PyCFunction) mmap_write_method, METH_VARARGS}, |
| 597 | {"write_byte", (PyCFunction) mmap_write_byte_method, METH_VARARGS}, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 598 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 599 | }; |
| 600 | |
| 601 | /* Functions for treating an mmap'ed file as a buffer */ |
| 602 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 603 | static int |
| 604 | mmap_buffer_getbuf(mmap_object *self, PyBuffer *view, int flags) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 605 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 606 | CHECK_VALID(-1); |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 607 | if (PyBuffer_FillInfo(view, self->data, self->size, |
| 608 | (self->access == ACCESS_READ), flags) < 0) |
| 609 | return -1; |
| 610 | self->exports++; |
| 611 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 612 | } |
| 613 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 614 | static void |
| 615 | mmap_buffer_releasebuf(mmap_object *self, PyBuffer *view) |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 616 | { |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 617 | self->exports--; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 621 | mmap_object_getattr(mmap_object *self, char *name) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 622 | { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 623 | return Py_FindMethod(mmap_object_methods, (PyObject *)self, name); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 624 | } |
| 625 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 626 | static Py_ssize_t |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 627 | mmap_length(mmap_object *self) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 628 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 629 | CHECK_VALID(-1); |
| 630 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 634 | mmap_item(mmap_object *self, Py_ssize_t i) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 635 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 636 | CHECK_VALID(NULL); |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 637 | if (i < 0 || (size_t)i >= self->size) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 638 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 639 | return NULL; |
| 640 | } |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 641 | return PyBytes_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 645 | mmap_slice(mmap_object *self, Py_ssize_t ilow, Py_ssize_t ihigh) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 646 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 647 | CHECK_VALID(NULL); |
| 648 | if (ilow < 0) |
| 649 | ilow = 0; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 650 | else if ((size_t)ilow > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 651 | ilow = self->size; |
| 652 | if (ihigh < 0) |
| 653 | ihigh = 0; |
| 654 | if (ihigh < ilow) |
| 655 | ihigh = ilow; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 656 | else if ((size_t)ihigh > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 657 | ihigh = self->size; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 658 | |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 659 | return PyBytes_FromStringAndSize(self->data + ilow, ihigh-ilow); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 663 | mmap_concat(mmap_object *self, PyObject *bb) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 664 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 665 | CHECK_VALID(NULL); |
| 666 | PyErr_SetString(PyExc_SystemError, |
| 667 | "mmaps don't support concatenation"); |
| 668 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 672 | mmap_repeat(mmap_object *self, Py_ssize_t n) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 673 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 674 | CHECK_VALID(NULL); |
| 675 | PyErr_SetString(PyExc_SystemError, |
| 676 | "mmaps don't support repeat operation"); |
| 677 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | static int |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 681 | mmap_ass_slice(mmap_object *self, Py_ssize_t ilow, Py_ssize_t ihigh, PyObject *v) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 682 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 683 | const char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 684 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 685 | CHECK_VALID(-1); |
| 686 | if (ilow < 0) |
| 687 | ilow = 0; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 688 | else if ((size_t)ilow > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 689 | ilow = self->size; |
| 690 | if (ihigh < 0) |
| 691 | ihigh = 0; |
| 692 | if (ihigh < ilow) |
| 693 | ihigh = ilow; |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 694 | else if ((size_t)ihigh > self->size) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 695 | ihigh = self->size; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 696 | |
Thomas Wouters | 1baac72 | 2001-07-16 15:47:36 +0000 | [diff] [blame] | 697 | if (v == NULL) { |
| 698 | PyErr_SetString(PyExc_TypeError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 699 | "mmap object doesn't support slice deletion"); |
Thomas Wouters | 1baac72 | 2001-07-16 15:47:36 +0000 | [diff] [blame] | 700 | return -1; |
| 701 | } |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 702 | if (! (PyBytes_Check(v)) ) { |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 703 | PyErr_SetString(PyExc_IndexError, |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 704 | "mmap slice assignment must be bytes"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 705 | return -1; |
| 706 | } |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 707 | if (PyBytes_Size(v) != (ihigh - ilow)) { |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 708 | PyErr_SetString(PyExc_IndexError, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 709 | "mmap slice assignment is wrong size"); |
| 710 | return -1; |
| 711 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 712 | if (!is_writeable(self)) |
| 713 | return -1; |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 714 | buf = PyBytes_AsString(v); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 715 | memcpy(self->data + ilow, buf, ihigh-ilow); |
| 716 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | static int |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 720 | 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] | 721 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 722 | const char *buf; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 723 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 724 | CHECK_VALID(-1); |
Guido van Rossum | ce8e1dc | 2000-07-01 00:51:51 +0000 | [diff] [blame] | 725 | if (i < 0 || (size_t)i >= self->size) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 726 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 727 | return -1; |
| 728 | } |
Thomas Wouters | 1baac72 | 2001-07-16 15:47:36 +0000 | [diff] [blame] | 729 | if (v == NULL) { |
| 730 | PyErr_SetString(PyExc_TypeError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 731 | "mmap object doesn't support item deletion"); |
Thomas Wouters | 1baac72 | 2001-07-16 15:47:36 +0000 | [diff] [blame] | 732 | return -1; |
| 733 | } |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 734 | if (! (PyBytes_Check(v) && PyBytes_Size(v)==1) ) { |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 735 | PyErr_SetString(PyExc_IndexError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 736 | "mmap assignment must be single-character string"); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 737 | return -1; |
| 738 | } |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 739 | if (!is_writeable(self)) |
| 740 | return -1; |
Guido van Rossum | b358a2c | 2007-07-16 19:29:02 +0000 | [diff] [blame] | 741 | buf = PyBytes_AsString(v); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 742 | self->data[i] = buf[0]; |
| 743 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | static PySequenceMethods mmap_as_sequence = { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 747 | (lenfunc)mmap_length, /*sq_length*/ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 748 | (binaryfunc)mmap_concat, /*sq_concat*/ |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 749 | (ssizeargfunc)mmap_repeat, /*sq_repeat*/ |
| 750 | (ssizeargfunc)mmap_item, /*sq_item*/ |
| 751 | (ssizessizeargfunc)mmap_slice, /*sq_slice*/ |
| 752 | (ssizeobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 753 | (ssizessizeobjargproc)mmap_ass_slice, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 754 | }; |
| 755 | |
| 756 | static PyBufferProcs mmap_as_buffer = { |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 757 | (getbufferproc)mmap_buffer_getbuf, |
| 758 | (releasebufferproc)mmap_buffer_releasebuf, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 759 | }; |
| 760 | |
| 761 | static PyTypeObject mmap_object_type = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 762 | PyVarObject_HEAD_INIT(0, 0) /* patched in module init */ |
Guido van Rossum | 1464839 | 2001-12-08 18:02:58 +0000 | [diff] [blame] | 763 | "mmap.mmap", /* tp_name */ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 764 | sizeof(mmap_object), /* tp_size */ |
| 765 | 0, /* tp_itemsize */ |
| 766 | /* methods */ |
| 767 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 768 | 0, /* tp_print */ |
| 769 | (getattrfunc) mmap_object_getattr, /* tp_getattr */ |
| 770 | 0, /* tp_setattr */ |
| 771 | 0, /* tp_compare */ |
| 772 | 0, /* tp_repr */ |
| 773 | 0, /* tp_as_number */ |
| 774 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 775 | 0, /*tp_as_mapping*/ |
| 776 | 0, /*tp_hash*/ |
| 777 | 0, /*tp_call*/ |
| 778 | 0, /*tp_str*/ |
| 779 | 0, /*tp_getattro*/ |
| 780 | 0, /*tp_setattro*/ |
| 781 | &mmap_as_buffer, /*tp_as_buffer*/ |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 782 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 783 | 0, /*tp_doc*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 784 | }; |
| 785 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 786 | |
| 787 | /* extract the map size from the given PyObject |
| 788 | |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 789 | Returns -1 on error, with an appropriate Python exception raised. On |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 790 | success, the map size is returned. */ |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 791 | static Py_ssize_t |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 792 | _GetMapSize(PyObject *o) |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 793 | { |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 794 | if (PyIndex_Check(o)) { |
| 795 | Py_ssize_t i = PyNumber_AsSsize_t(o, PyExc_OverflowError); |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 796 | if (i==-1 && PyErr_Occurred()) |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 797 | return -1; |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 798 | if (i < 0) { |
| 799 | PyErr_SetString(PyExc_OverflowError, |
| 800 | "memory mapped size must be positive"); |
| 801 | return -1; |
| 802 | } |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 803 | return i; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 804 | } |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 805 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 806 | PyErr_SetString(PyExc_TypeError, "map size must be an integral value"); |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 807 | return -1; |
| 808 | } |
| 809 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 810 | #ifdef UNIX |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 811 | static PyObject * |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 812 | new_mmap_object(PyObject *self, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 813 | { |
Neal Norwitz | b567392 | 2002-09-05 21:48:07 +0000 | [diff] [blame] | 814 | #ifdef HAVE_FSTAT |
| 815 | struct stat st; |
| 816 | #endif |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 817 | mmap_object *m_obj; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 818 | PyObject *map_size_obj = NULL; |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 819 | Py_ssize_t map_size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 820 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 821 | int devzero = -1; |
Neal Norwitz | 8856fb7 | 2005-12-18 03:34:22 +0000 | [diff] [blame] | 822 | int access = (int)ACCESS_DEFAULT; |
Martin v. Löwis | 02cbf4a | 2006-02-27 17:20:04 +0000 | [diff] [blame] | 823 | static char *keywords[] = {"fileno", "length", |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 824 | "flags", "prot", |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 825 | "access", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 826 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 827 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|iii", keywords, |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 828 | &fd, &map_size_obj, &flags, &prot, |
| 829 | &access)) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 830 | return NULL; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 831 | map_size = _GetMapSize(map_size_obj); |
| 832 | if (map_size < 0) |
| 833 | return NULL; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 834 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 835 | if ((access != (int)ACCESS_DEFAULT) && |
Neal Norwitz | d1cfc8a | 2006-02-05 03:36:57 +0000 | [diff] [blame] | 836 | ((flags != MAP_SHARED) || (prot != (PROT_WRITE | PROT_READ)))) |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 837 | return PyErr_Format(PyExc_ValueError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 838 | "mmap can't specify both access and flags, prot."); |
Neal Norwitz | d1cfc8a | 2006-02-05 03:36:57 +0000 | [diff] [blame] | 839 | switch ((access_mode)access) { |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 840 | case ACCESS_READ: |
| 841 | flags = MAP_SHARED; |
| 842 | prot = PROT_READ; |
| 843 | break; |
| 844 | case ACCESS_WRITE: |
| 845 | flags = MAP_SHARED; |
| 846 | prot = PROT_READ | PROT_WRITE; |
| 847 | break; |
| 848 | case ACCESS_COPY: |
| 849 | flags = MAP_PRIVATE; |
| 850 | prot = PROT_READ | PROT_WRITE; |
| 851 | break; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 852 | case ACCESS_DEFAULT: |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 853 | /* use the specified or default values of flags and prot */ |
| 854 | break; |
| 855 | default: |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 856 | return PyErr_Format(PyExc_ValueError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 857 | "mmap invalid access parameter."); |
| 858 | } |
Neal Norwitz | b567392 | 2002-09-05 21:48:07 +0000 | [diff] [blame] | 859 | |
| 860 | #ifdef HAVE_FSTAT |
Martin v. Löwis | c16f3bd | 2003-05-03 09:14:54 +0000 | [diff] [blame] | 861 | # ifdef __VMS |
| 862 | /* on OpenVMS we must ensure that all bytes are written to the file */ |
| 863 | fsync(fd); |
| 864 | # endif |
Martin v. Löwis | 7fe60c0 | 2005-03-03 11:22:44 +0000 | [diff] [blame] | 865 | if (fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) { |
| 866 | if (map_size == 0) { |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 867 | map_size = st.st_size; |
Martin v. Löwis | 7fe60c0 | 2005-03-03 11:22:44 +0000 | [diff] [blame] | 868 | } else if ((size_t)map_size > st.st_size) { |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 869 | PyErr_SetString(PyExc_ValueError, |
Martin v. Löwis | 7fe60c0 | 2005-03-03 11:22:44 +0000 | [diff] [blame] | 870 | "mmap length is greater than file size"); |
| 871 | return NULL; |
| 872 | } |
Neal Norwitz | b567392 | 2002-09-05 21:48:07 +0000 | [diff] [blame] | 873 | } |
| 874 | #endif |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 875 | m_obj = PyObject_New(mmap_object, &mmap_object_type); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 876 | if (m_obj == NULL) {return NULL;} |
Neal Norwitz | 3b4fff8 | 2006-01-11 08:54:45 +0000 | [diff] [blame] | 877 | m_obj->data = NULL; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 878 | m_obj->size = (size_t) map_size; |
| 879 | m_obj->pos = (size_t) 0; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 880 | m_obj->exports = 0; |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 881 | if (fd == -1) { |
| 882 | m_obj->fd = -1; |
| 883 | /* Assume the caller wants to map anonymous memory. |
| 884 | This is the same behaviour as Windows. mmap.mmap(-1, size) |
| 885 | on both Windows and Unix map anonymous memory. |
| 886 | */ |
| 887 | #ifdef MAP_ANONYMOUS |
| 888 | /* BSD way to map anonymous memory */ |
| 889 | flags |= MAP_ANONYMOUS; |
| 890 | #else |
| 891 | /* SVR4 method to map anonymous memory is to open /dev/zero */ |
| 892 | fd = devzero = open("/dev/zero", O_RDWR); |
| 893 | if (devzero == -1) { |
| 894 | Py_DECREF(m_obj); |
| 895 | PyErr_SetFromErrno(mmap_module_error); |
| 896 | return NULL; |
| 897 | } |
| 898 | #endif |
| 899 | } else { |
| 900 | m_obj->fd = dup(fd); |
| 901 | if (m_obj->fd == -1) { |
| 902 | Py_DECREF(m_obj); |
| 903 | PyErr_SetFromErrno(mmap_module_error); |
| 904 | return NULL; |
| 905 | } |
Georg Brandl | 38387b8 | 2005-08-24 07:17:40 +0000 | [diff] [blame] | 906 | } |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 907 | |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 908 | m_obj->data = mmap(NULL, map_size, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 909 | prot, flags, |
| 910 | fd, 0); |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 911 | |
| 912 | if (devzero != -1) { |
| 913 | close(devzero); |
| 914 | } |
| 915 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 916 | if (m_obj->data == (char *)-1) { |
Andrew M. Kuchling | 16581c8 | 2004-05-19 14:39:08 +0000 | [diff] [blame] | 917 | m_obj->data = NULL; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 918 | Py_DECREF(m_obj); |
| 919 | PyErr_SetFromErrno(mmap_module_error); |
| 920 | return NULL; |
| 921 | } |
Neal Norwitz | 8856fb7 | 2005-12-18 03:34:22 +0000 | [diff] [blame] | 922 | m_obj->access = (access_mode)access; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 923 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 924 | } |
| 925 | #endif /* UNIX */ |
| 926 | |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 927 | #ifdef MS_WINDOWS |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 928 | static PyObject * |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 929 | new_mmap_object(PyObject *self, PyObject *args, PyObject *kwdict) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 930 | { |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 931 | mmap_object *m_obj; |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 932 | PyObject *map_size_obj = NULL; |
Martin v. Löwis | cfe7e09 | 2006-02-17 06:59:14 +0000 | [diff] [blame] | 933 | Py_ssize_t map_size; |
Tim Peters | e564e7f | 2006-02-16 23:46:01 +0000 | [diff] [blame] | 934 | DWORD size_hi; /* upper 32 bits of m_obj->size */ |
| 935 | DWORD size_lo; /* lower 32 bits of m_obj->size */ |
Fredrik Lundh | 54cf3dc | 2000-07-08 22:05:01 +0000 | [diff] [blame] | 936 | char *tagname = ""; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 937 | DWORD dwErr = 0; |
| 938 | int fileno; |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 939 | HANDLE fh = 0; |
Neal Norwitz | 8856fb7 | 2005-12-18 03:34:22 +0000 | [diff] [blame] | 940 | int access = (access_mode)ACCESS_DEFAULT; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 941 | DWORD flProtect, dwDesiredAccess; |
Martin v. Löwis | 02cbf4a | 2006-02-27 17:20:04 +0000 | [diff] [blame] | 942 | static char *keywords[] = { "fileno", "length", |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 943 | "tagname", |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 944 | "access", NULL }; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 945 | |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 946 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, "iO|zi", keywords, |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 947 | &fileno, &map_size_obj, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 948 | &tagname, &access)) { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 949 | return NULL; |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 950 | } |
| 951 | |
Neal Norwitz | 8856fb7 | 2005-12-18 03:34:22 +0000 | [diff] [blame] | 952 | switch((access_mode)access) { |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 953 | case ACCESS_READ: |
| 954 | flProtect = PAGE_READONLY; |
| 955 | dwDesiredAccess = FILE_MAP_READ; |
| 956 | break; |
| 957 | case ACCESS_DEFAULT: case ACCESS_WRITE: |
| 958 | flProtect = PAGE_READWRITE; |
| 959 | dwDesiredAccess = FILE_MAP_WRITE; |
| 960 | break; |
| 961 | case ACCESS_COPY: |
| 962 | flProtect = PAGE_WRITECOPY; |
| 963 | dwDesiredAccess = FILE_MAP_COPY; |
| 964 | break; |
| 965 | default: |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 966 | return PyErr_Format(PyExc_ValueError, |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 967 | "mmap invalid access parameter."); |
| 968 | } |
| 969 | |
Andrew M. Kuchling | 70d2742 | 2000-06-18 04:45:14 +0000 | [diff] [blame] | 970 | map_size = _GetMapSize(map_size_obj); |
| 971 | if (map_size < 0) |
| 972 | return NULL; |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 973 | |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 974 | /* assume -1 and 0 both mean invalid filedescriptor |
| 975 | to 'anonymously' map memory. |
| 976 | XXX: fileno == 0 is a valid fd, but was accepted prior to 2.5. |
| 977 | XXX: Should this code be added? |
| 978 | if (fileno == 0) |
Skip Montanaro | 46fc337 | 2007-08-12 11:44:53 +0000 | [diff] [blame] | 979 | PyErr_WarnEx(PyExc_DeprecationWarning, |
| 980 | "don't use 0 for anonymous memory", |
| 981 | 1); |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 982 | */ |
| 983 | if (fileno != -1 && fileno != 0) { |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 984 | fh = (HANDLE)_get_osfhandle(fileno); |
| 985 | if (fh==(HANDLE)-1) { |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 986 | PyErr_SetFromErrno(mmap_module_error); |
| 987 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 988 | } |
Fred Drake | 1ef4e2d | 2000-04-05 14:15:31 +0000 | [diff] [blame] | 989 | /* Win9x appears to need us seeked to zero */ |
Guido van Rossum | 69c2b88 | 2003-04-09 19:31:02 +0000 | [diff] [blame] | 990 | lseek(fileno, 0, SEEK_SET); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 991 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 992 | |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 993 | m_obj = PyObject_New(mmap_object, &mmap_object_type); |
| 994 | if (m_obj == NULL) |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 995 | return NULL; |
| 996 | /* Set every field to an invalid marker, so we can safely |
| 997 | destruct the object in the face of failure */ |
| 998 | m_obj->data = NULL; |
Mark Hammond | 071864a | 2000-07-30 02:46:26 +0000 | [diff] [blame] | 999 | m_obj->file_handle = INVALID_HANDLE_VALUE; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1000 | m_obj->map_handle = INVALID_HANDLE_VALUE; |
| 1001 | m_obj->tagname = NULL; |
| 1002 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1003 | if (fh) { |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1004 | /* It is necessary to duplicate the handle, so the |
| 1005 | Python code can close it on us */ |
| 1006 | if (!DuplicateHandle( |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1007 | GetCurrentProcess(), /* source process handle */ |
| 1008 | fh, /* handle to be duplicated */ |
| 1009 | GetCurrentProcess(), /* target proc handle */ |
| 1010 | (LPHANDLE)&m_obj->file_handle, /* result */ |
| 1011 | 0, /* access - ignored due to options value */ |
| 1012 | FALSE, /* inherited by child processes? */ |
| 1013 | DUPLICATE_SAME_ACCESS)) { /* options */ |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1014 | dwErr = GetLastError(); |
| 1015 | Py_DECREF(m_obj); |
| 1016 | PyErr_SetFromWindowsErr(dwErr); |
| 1017 | return NULL; |
| 1018 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1019 | if (!map_size) { |
Martin v. Löwis | 1518607 | 2006-02-18 12:38:35 +0000 | [diff] [blame] | 1020 | DWORD low,high; |
| 1021 | low = GetFileSize(fh, &high); |
| 1022 | /* low might just happen to have the value INVALID_FILE_SIZE; |
| 1023 | so we need to check the last error also. */ |
| 1024 | if (low == INVALID_FILE_SIZE && |
| 1025 | (dwErr = GetLastError()) != NO_ERROR) { |
| 1026 | Py_DECREF(m_obj); |
| 1027 | return PyErr_SetFromWindowsErr(dwErr); |
| 1028 | } |
| 1029 | |
| 1030 | #if SIZEOF_SIZE_T > 4 |
| 1031 | m_obj->size = (((size_t)high)<<32) + low; |
| 1032 | #else |
| 1033 | if (high) |
| 1034 | /* File is too large to map completely */ |
| 1035 | m_obj->size = (size_t)-1; |
| 1036 | else |
| 1037 | m_obj->size = low; |
| 1038 | #endif |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1039 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1040 | m_obj->size = map_size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1041 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1042 | } |
| 1043 | else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1044 | m_obj->size = map_size; |
| 1045 | } |
| 1046 | |
| 1047 | /* set the initial position */ |
| 1048 | m_obj->pos = (size_t) 0; |
| 1049 | |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 1050 | m_obj->exports = 0; |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1051 | /* set the tag name */ |
Tim Peters | 0d9f9dc | 2001-01-10 05:42:18 +0000 | [diff] [blame] | 1052 | if (tagname != NULL && *tagname != '\0') { |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1053 | m_obj->tagname = PyMem_Malloc(strlen(tagname)+1); |
| 1054 | if (m_obj->tagname == NULL) { |
| 1055 | PyErr_NoMemory(); |
| 1056 | Py_DECREF(m_obj); |
| 1057 | return NULL; |
| 1058 | } |
| 1059 | strcpy(m_obj->tagname, tagname); |
| 1060 | } |
| 1061 | else |
| 1062 | m_obj->tagname = NULL; |
| 1063 | |
Neal Norwitz | 8856fb7 | 2005-12-18 03:34:22 +0000 | [diff] [blame] | 1064 | m_obj->access = (access_mode)access; |
Tim Peters | e564e7f | 2006-02-16 23:46:01 +0000 | [diff] [blame] | 1065 | /* DWORD is a 4-byte int. If we're on a box where size_t consumes |
Thomas Wouters | 2c98a7b | 2006-02-17 09:59:00 +0000 | [diff] [blame] | 1066 | * more than 4 bytes, we need to break it apart. Else (size_t |
Tim Peters | e564e7f | 2006-02-16 23:46:01 +0000 | [diff] [blame] | 1067 | * consumes 4 bytes), C doesn't define what happens if we shift |
| 1068 | * right by 32, so we need different code. |
| 1069 | */ |
| 1070 | #if SIZEOF_SIZE_T > 4 |
| 1071 | size_hi = (DWORD)(m_obj->size >> 32); |
| 1072 | size_lo = (DWORD)(m_obj->size & 0xFFFFFFFF); |
| 1073 | #else |
| 1074 | size_hi = 0; |
| 1075 | size_lo = (DWORD)m_obj->size; |
| 1076 | #endif |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 1077 | m_obj->map_handle = CreateFileMapping(m_obj->file_handle, |
| 1078 | NULL, |
| 1079 | flProtect, |
| 1080 | size_hi, |
| 1081 | size_lo, |
| 1082 | m_obj->tagname); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1083 | if (m_obj->map_handle != NULL) { |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 1084 | m_obj->data = (char *) MapViewOfFile(m_obj->map_handle, |
| 1085 | dwDesiredAccess, |
| 1086 | 0, |
| 1087 | 0, |
| 1088 | 0); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 1089 | if (m_obj->data != NULL) |
| 1090 | return (PyObject *)m_obj; |
| 1091 | else |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1092 | dwErr = GetLastError(); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 1093 | } else |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1094 | dwErr = GetLastError(); |
Mark Hammond | 2cbed00 | 2000-07-30 02:22:43 +0000 | [diff] [blame] | 1095 | Py_DECREF(m_obj); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1096 | PyErr_SetFromWindowsErr(dwErr); |
Tim Peters | 23721ee | 2006-02-16 23:50:16 +0000 | [diff] [blame] | 1097 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1098 | } |
Martin v. Löwis | 6238d2b | 2002-06-30 15:26:10 +0000 | [diff] [blame] | 1099 | #endif /* MS_WINDOWS */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1100 | |
| 1101 | /* List of functions exported by this module */ |
| 1102 | static struct PyMethodDef mmap_functions[] = { |
Tim Peters | ec0a5f0 | 2006-02-16 23:47:20 +0000 | [diff] [blame] | 1103 | {"mmap", (PyCFunction) new_mmap_object, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1104 | METH_VARARGS|METH_KEYWORDS}, |
| 1105 | {NULL, NULL} /* Sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1106 | }; |
| 1107 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1108 | static void |
| 1109 | setint(PyObject *d, const char *name, long value) |
| 1110 | { |
| 1111 | PyObject *o = PyInt_FromLong(value); |
| 1112 | if (o && PyDict_SetItemString(d, name, o) == 0) { |
| 1113 | Py_DECREF(o); |
| 1114 | } |
| 1115 | } |
| 1116 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 1117 | PyMODINIT_FUNC |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1118 | initmmap(void) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1119 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1120 | PyObject *dict, *module; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1121 | |
| 1122 | /* Patch the object type */ |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 1123 | Py_Type(&mmap_object_type) = &PyType_Type; |
Tim Peters | 2caf8df | 2001-01-14 05:05:51 +0000 | [diff] [blame] | 1124 | |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 1125 | module = Py_InitModule("mmap", mmap_functions); |
Neal Norwitz | 1ac754f | 2006-01-19 06:09:39 +0000 | [diff] [blame] | 1126 | if (module == NULL) |
| 1127 | return; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 1128 | dict = PyModule_GetDict(module); |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1129 | if (!dict) |
| 1130 | return; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1131 | mmap_module_error = PyExc_EnvironmentError; |
Tim Peters | 8f9cc29 | 2006-02-17 00:00:20 +0000 | [diff] [blame] | 1132 | PyDict_SetItemString(dict, "error", mmap_module_error); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1133 | #ifdef PROT_EXEC |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1134 | setint(dict, "PROT_EXEC", PROT_EXEC); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1135 | #endif |
| 1136 | #ifdef PROT_READ |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1137 | setint(dict, "PROT_READ", PROT_READ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1138 | #endif |
| 1139 | #ifdef PROT_WRITE |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1140 | setint(dict, "PROT_WRITE", PROT_WRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1141 | #endif |
| 1142 | |
| 1143 | #ifdef MAP_SHARED |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1144 | setint(dict, "MAP_SHARED", MAP_SHARED); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1145 | #endif |
| 1146 | #ifdef MAP_PRIVATE |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1147 | setint(dict, "MAP_PRIVATE", MAP_PRIVATE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1148 | #endif |
| 1149 | #ifdef MAP_DENYWRITE |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1150 | setint(dict, "MAP_DENYWRITE", MAP_DENYWRITE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1151 | #endif |
| 1152 | #ifdef MAP_EXECUTABLE |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1153 | setint(dict, "MAP_EXECUTABLE", MAP_EXECUTABLE); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1154 | #endif |
Neal Norwitz | 0e6bc8c | 2006-02-05 05:45:43 +0000 | [diff] [blame] | 1155 | #ifdef MAP_ANONYMOUS |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1156 | setint(dict, "MAP_ANON", MAP_ANONYMOUS); |
| 1157 | setint(dict, "MAP_ANONYMOUS", MAP_ANONYMOUS); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 1158 | #endif |
| 1159 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1160 | setint(dict, "PAGESIZE", (long)my_getpagesize()); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame] | 1161 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 1162 | setint(dict, "ACCESS_READ", ACCESS_READ); |
| 1163 | setint(dict, "ACCESS_WRITE", ACCESS_WRITE); |
| 1164 | setint(dict, "ACCESS_COPY", ACCESS_COPY); |
Tim Peters | 5ebfd36 | 2001-11-13 23:11:19 +0000 | [diff] [blame] | 1165 | } |