Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 1 | /* |
| 2 | / Author: Sam Rushing <rushing@nightmare.com> |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 3 | / Hacked for Unix by A.M. Kuchling <amk1@bigfoot.com> |
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 | / |
| 12 | / Note: This module currently only deals with 32-bit file |
| 13 | / sizes. |
| 14 | / |
| 15 | / The latest version of mmapfile is maintained by Sam at |
| 16 | / ftp://squirl.nightmare.com/pub/python/python-ext. |
| 17 | */ |
| 18 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 19 | #include <Python.h> |
| 20 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 21 | #ifndef MS_WIN32 |
| 22 | #define UNIX |
| 23 | #endif |
| 24 | |
| 25 | #ifdef MS_WIN32 |
| 26 | #include <windows.h> |
| 27 | #endif |
| 28 | |
| 29 | #ifdef UNIX |
| 30 | #include <unistd.h> |
| 31 | #include <sys/mman.h> |
| 32 | #endif |
| 33 | |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 34 | #include <string.h> |
| 35 | #include <sys/types.h> |
| 36 | |
| 37 | static PyObject *mmap_module_error; |
| 38 | |
| 39 | typedef struct { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 40 | PyObject_HEAD |
| 41 | char * data; |
| 42 | size_t size; |
| 43 | size_t pos; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 44 | |
| 45 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 46 | HANDLE map_handle; |
| 47 | HFILE file_handle; |
| 48 | char * tagname; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 49 | #endif |
| 50 | |
| 51 | #ifdef UNIX |
| 52 | /* No Unix-specific information at this point in time */ |
| 53 | #endif |
| 54 | } mmap_object; |
| 55 | |
| 56 | static void |
| 57 | mmap_object_dealloc(mmap_object * m_obj) |
| 58 | { |
| 59 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 60 | UnmapViewOfFile (m_obj->data); |
| 61 | CloseHandle (m_obj->map_handle); |
| 62 | CloseHandle ((HANDLE)m_obj->file_handle); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 63 | #endif /* MS_WIN32 */ |
| 64 | |
| 65 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 66 | if (m_obj->data!=NULL) { |
| 67 | msync(m_obj->data, m_obj->size, MS_SYNC | MS_INVALIDATE); |
| 68 | munmap(m_obj->data, m_obj->size); |
| 69 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 70 | #endif /* UNIX */ |
| 71 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 72 | PyObject_Del(m_obj); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static PyObject * |
| 76 | mmap_close_method (mmap_object * self, PyObject * args) |
| 77 | { |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 78 | if (!PyArg_NoArgs(args)) |
| 79 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 80 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 81 | UnmapViewOfFile (self->data); |
| 82 | CloseHandle (self->map_handle); |
| 83 | CloseHandle ((HANDLE)self->file_handle); |
| 84 | self->map_handle = (HANDLE) NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 85 | #endif /* MS_WIN32 */ |
| 86 | |
| 87 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 88 | munmap(self->data, self->size); |
| 89 | self->data = NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 90 | #endif |
| 91 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 92 | Py_INCREF (Py_None); |
| 93 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 97 | #define CHECK_VALID(err) \ |
| 98 | do { \ |
| 99 | if (!self->map_handle) { \ |
| 100 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 101 | return err; \ |
| 102 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 103 | } while (0) |
| 104 | #endif /* MS_WIN32 */ |
| 105 | |
| 106 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 107 | #define CHECK_VALID(err) \ |
| 108 | do { \ |
| 109 | if (self->data == NULL) { \ |
| 110 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 111 | return err; \ |
| 112 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 113 | } while (0) |
| 114 | #endif /* UNIX */ |
| 115 | |
| 116 | static PyObject * |
| 117 | mmap_read_byte_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 118 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 119 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 120 | char value; |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 121 | char * where; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 122 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 123 | if (!PyArg_NoArgs(args)) |
| 124 | return NULL; |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 125 | if (self->pos >= 0 && self->pos < self->size) { |
| 126 | where = self->data + self->pos; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 127 | value = (char) *(where); |
| 128 | self->pos += 1; |
| 129 | return Py_BuildValue("c", (char) *(where)); |
| 130 | } else { |
| 131 | PyErr_SetString (PyExc_ValueError, "read byte out of range"); |
| 132 | return NULL; |
| 133 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | static PyObject * |
| 137 | mmap_read_line_method (mmap_object * self, |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 138 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 139 | { |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 140 | char * start = self->data+self->pos; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 141 | char * eof = self->data+self->size; |
| 142 | char * eol; |
| 143 | PyObject * result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 144 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 145 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 146 | if (!PyArg_NoArgs(args)) |
| 147 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 148 | |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 149 | eol = memchr(start, '\n', self->size - self->pos); |
| 150 | if (!eol) |
| 151 | eol = eof; |
| 152 | else |
| 153 | ++eol; /* we're interested in the position after the |
| 154 | newline. */ |
| 155 | result = PyString_FromStringAndSize(start, (long) (eol - start)); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 156 | self->pos += (eol - start); |
| 157 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | static PyObject * |
| 161 | mmap_read_method (mmap_object * self, |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 162 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 163 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 164 | long num_bytes; |
| 165 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 166 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 167 | CHECK_VALID(NULL); |
| 168 | if (!PyArg_ParseTuple (args, "l", &num_bytes)) |
| 169 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 170 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 171 | /* silently 'adjust' out-of-range requests */ |
| 172 | if ((self->pos + num_bytes) > self->size) { |
| 173 | num_bytes -= (self->pos+num_bytes) - self->size; |
| 174 | } |
| 175 | result = Py_BuildValue("s#", self->data+self->pos, num_bytes); |
| 176 | self->pos += num_bytes; |
| 177 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | static PyObject * |
| 181 | mmap_find_method (mmap_object *self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 182 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 183 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 184 | long start = self->pos; |
| 185 | char * needle; |
| 186 | int len; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 187 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 188 | CHECK_VALID(NULL); |
| 189 | if (!PyArg_ParseTuple (args, "s#|l", &needle, &len, &start)) { |
| 190 | return NULL; |
| 191 | } else { |
| 192 | char * p = self->data+self->pos; |
| 193 | char * e = self->data+self->size; |
| 194 | while (p < e) { |
| 195 | char * s = p; |
| 196 | char * n = needle; |
| 197 | while ((s<e) && (*n) && !(*s-*n)) { |
| 198 | s++, n++; |
| 199 | } |
| 200 | if (!*n) { |
| 201 | return Py_BuildValue ( |
| 202 | "l", |
| 203 | (long) (p - (self->data + start))); |
| 204 | } |
| 205 | p++; |
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 | return Py_BuildValue ("l", (long) -1); |
| 208 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | static PyObject * |
| 212 | mmap_write_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 213 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 214 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 215 | long length; |
| 216 | char * data; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 217 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 218 | CHECK_VALID(NULL); |
| 219 | if (!PyArg_ParseTuple (args, "s#", &data, &length)) |
| 220 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 221 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 222 | if ((self->pos + length) > self->size) { |
| 223 | PyErr_SetString (PyExc_ValueError, "data out of range"); |
| 224 | return NULL; |
| 225 | } |
| 226 | memcpy (self->data+self->pos, data, length); |
| 227 | self->pos = self->pos+length; |
| 228 | Py_INCREF (Py_None); |
| 229 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static PyObject * |
| 233 | mmap_write_byte_method (mmap_object * self, |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 234 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 235 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 236 | char value; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 237 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 238 | CHECK_VALID(NULL); |
| 239 | if (!PyArg_ParseTuple (args, "c", &value)) |
| 240 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 241 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 242 | *(self->data+self->pos) = value; |
| 243 | self->pos += 1; |
| 244 | Py_INCREF (Py_None); |
| 245 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | static PyObject * |
| 249 | mmap_size_method (mmap_object * self, |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 250 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 251 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 252 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 253 | if (!PyArg_NoArgs(args)) |
| 254 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 255 | |
| 256 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 257 | if (self->file_handle != (HFILE) 0xFFFFFFFF) { |
| 258 | return (Py_BuildValue ( |
| 259 | "l", |
| 260 | GetFileSize ((HANDLE)self->file_handle, NULL))); |
| 261 | } else { |
| 262 | return (Py_BuildValue ("l", self->size) ); |
| 263 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 264 | #endif /* MS_WIN32 */ |
| 265 | |
| 266 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 267 | return (Py_BuildValue ("l", self->size) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 268 | #endif /* UNIX */ |
| 269 | } |
| 270 | |
| 271 | /* This assumes that you want the entire file mapped, |
| 272 | / and when recreating the map will make the new file |
| 273 | / have the new size |
| 274 | / |
| 275 | / Is this really necessary? This could easily be done |
| 276 | / from python by just closing and re-opening with the |
| 277 | / new size? |
| 278 | */ |
| 279 | |
| 280 | static PyObject * |
| 281 | mmap_resize_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 282 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 283 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 284 | unsigned long new_size; |
| 285 | CHECK_VALID(NULL); |
| 286 | if (!PyArg_ParseTuple (args, "l", &new_size)) { |
| 287 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 288 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 289 | } else { |
| 290 | DWORD dwErrCode = 0; |
| 291 | /* First, unmap the file view */ |
| 292 | UnmapViewOfFile (self->data); |
| 293 | /* Close the mapping object */ |
| 294 | CloseHandle ((HANDLE)self->map_handle); |
| 295 | /* Move to the desired EOF position */ |
| 296 | SetFilePointer ((HANDLE)self->file_handle, |
| 297 | new_size, NULL, FILE_BEGIN); |
| 298 | /* Change the size of the file */ |
| 299 | SetEndOfFile ((HANDLE)self->file_handle); |
| 300 | /* Create another mapping object and remap the file view */ |
| 301 | self->map_handle = CreateFileMapping ( |
| 302 | (HANDLE) self->file_handle, |
| 303 | NULL, |
| 304 | PAGE_READWRITE, |
| 305 | 0, |
| 306 | new_size, |
| 307 | self->tagname); |
| 308 | if (self->map_handle != NULL) { |
| 309 | self->data = (char *) MapViewOfFile (self->map_handle, |
| 310 | FILE_MAP_WRITE, |
| 311 | 0, |
| 312 | 0, |
| 313 | 0); |
| 314 | if (self->data != NULL) { |
| 315 | self->size = new_size; |
| 316 | Py_INCREF (Py_None); |
| 317 | return Py_None; |
| 318 | } else { |
| 319 | dwErrCode = GetLastError(); |
| 320 | } |
| 321 | } else { |
| 322 | dwErrCode = GetLastError(); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 323 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 324 | PyErr_SetFromWindowsErr(dwErrCode); |
| 325 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 326 | #endif /* MS_WIN32 */ |
| 327 | |
| 328 | #ifdef UNIX |
| 329 | #ifndef MREMAP_MAYMOVE |
| 330 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 331 | PyErr_SetString(PyExc_SystemError, |
| 332 | "mmap: resizing not available--no mremap()"); |
| 333 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 334 | #else |
| 335 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 336 | void *newmap; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 337 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 338 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
| 339 | if (newmap == (void *)-1) |
| 340 | { |
| 341 | PyErr_SetFromErrno(mmap_module_error); |
| 342 | return NULL; |
| 343 | } |
| 344 | self->data = newmap; |
| 345 | self->size = new_size; |
| 346 | Py_INCREF(Py_None); |
| 347 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 348 | #endif /* MREMAP_MAYMOVE */ |
| 349 | #endif /* UNIX */ |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | static PyObject * |
| 354 | mmap_tell_method (mmap_object * self, PyObject * args) |
| 355 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 356 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 357 | if (!PyArg_NoArgs(args)) |
| 358 | return NULL; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 359 | return (Py_BuildValue ("l", self->pos) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | static PyObject * |
| 363 | mmap_flush_method (mmap_object * self, PyObject * args) |
| 364 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 365 | size_t offset = 0; |
| 366 | size_t size = self->size; |
| 367 | CHECK_VALID(NULL); |
| 368 | if (!PyArg_ParseTuple (args, "|ll", &offset, &size)) { |
| 369 | return NULL; |
| 370 | } else if ((offset + size) > self->size) { |
| 371 | PyErr_SetString (PyExc_ValueError, |
| 372 | "flush values out of range"); |
| 373 | return NULL; |
| 374 | } else { |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 375 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 376 | return (Py_BuildValue ( |
| 377 | "l", FlushViewOfFile (self->data+offset, size))); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 378 | #endif /* MS_WIN32 */ |
| 379 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 380 | /* XXX semantics of return value? */ |
| 381 | /* XXX flags for msync? */ |
| 382 | if (-1 == msync(self->data + offset, size, |
| 383 | MS_SYNC | MS_INVALIDATE)) |
| 384 | { |
| 385 | PyErr_SetFromErrno(mmap_module_error); |
| 386 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 387 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 388 | return Py_BuildValue ("l", 0); |
| 389 | #endif /* UNIX */ |
| 390 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | static PyObject * |
| 394 | mmap_seek_method (mmap_object * self, PyObject * args) |
| 395 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 396 | /* ptrdiff_t dist; */ |
| 397 | long dist; |
| 398 | int how=0; |
| 399 | CHECK_VALID(NULL); |
| 400 | if (!PyArg_ParseTuple (args, "l|i", &dist, &how)) { |
| 401 | return(NULL); |
| 402 | } else { |
| 403 | unsigned long where; |
| 404 | switch (how) { |
| 405 | case 0: |
| 406 | where = dist; |
| 407 | break; |
| 408 | case 1: |
| 409 | where = self->pos + dist; |
| 410 | break; |
| 411 | case 2: |
| 412 | where = self->size - dist; |
| 413 | break; |
| 414 | default: |
| 415 | PyErr_SetString (PyExc_ValueError, |
| 416 | "unknown seek type"); |
| 417 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 418 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 419 | if ((where >= 0) && (where < (self->size))) { |
| 420 | self->pos = where; |
| 421 | Py_INCREF (Py_None); |
| 422 | return (Py_None); |
| 423 | } else { |
| 424 | PyErr_SetString (PyExc_ValueError, |
| 425 | "seek out of range"); |
| 426 | return NULL; |
| 427 | } |
| 428 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | static PyObject * |
| 432 | mmap_move_method (mmap_object * self, PyObject * args) |
| 433 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 434 | unsigned long dest, src, count; |
| 435 | CHECK_VALID(NULL); |
| 436 | if (!PyArg_ParseTuple (args, "iii", &dest, &src, &count)) { |
| 437 | return NULL; |
| 438 | } else { |
| 439 | /* bounds check the values */ |
| 440 | if (/* end of source after end of data?? */ |
| 441 | ((src+count) > self->size) |
| 442 | /* dest will fit? */ |
| 443 | || (dest+count > self->size)) { |
| 444 | PyErr_SetString (PyExc_ValueError, |
| 445 | "source or destination out of range"); |
| 446 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 447 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 448 | memmove (self->data+dest, self->data+src, count); |
| 449 | Py_INCREF (Py_None); |
| 450 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 451 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 452 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static struct PyMethodDef mmap_object_methods[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 456 | {"close", (PyCFunction) mmap_close_method, 1}, |
| 457 | {"find", (PyCFunction) mmap_find_method, 1}, |
| 458 | {"flush", (PyCFunction) mmap_flush_method, 1}, |
| 459 | {"move", (PyCFunction) mmap_move_method, 1}, |
| 460 | {"read", (PyCFunction) mmap_read_method, 1}, |
| 461 | {"read_byte", (PyCFunction) mmap_read_byte_method, 1}, |
| 462 | {"readline", (PyCFunction) mmap_read_line_method, 1}, |
| 463 | {"resize", (PyCFunction) mmap_resize_method, 1}, |
| 464 | {"seek", (PyCFunction) mmap_seek_method, 1}, |
| 465 | {"size", (PyCFunction) mmap_size_method, 1}, |
| 466 | {"tell", (PyCFunction) mmap_tell_method, 1}, |
| 467 | {"write", (PyCFunction) mmap_write_method, 1}, |
| 468 | {"write_byte", (PyCFunction) mmap_write_byte_method, 1}, |
| 469 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 470 | }; |
| 471 | |
| 472 | /* Functions for treating an mmap'ed file as a buffer */ |
| 473 | |
| 474 | static int |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 475 | mmap_buffer_getreadbuf(mmap_object *self, int index, const void **ptr) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 476 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 477 | CHECK_VALID(-1); |
| 478 | if ( index != 0 ) { |
| 479 | PyErr_SetString(PyExc_SystemError, |
| 480 | "Accessing non-existent mmap segment"); |
| 481 | return -1; |
| 482 | } |
| 483 | *ptr = self->data; |
| 484 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | static int |
| 488 | mmap_buffer_getwritebuf(self, index, ptr) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 489 | mmap_object *self; |
| 490 | int index; |
| 491 | const void **ptr; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 492 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 493 | CHECK_VALID(-1); |
| 494 | if ( index != 0 ) { |
| 495 | PyErr_SetString(PyExc_SystemError, |
| 496 | "Accessing non-existent mmap segment"); |
| 497 | return -1; |
| 498 | } |
| 499 | *ptr = self->data; |
| 500 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | static int |
| 504 | mmap_buffer_getsegcount(self, lenp) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 505 | mmap_object *self; |
| 506 | int *lenp; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 507 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 508 | CHECK_VALID(-1); |
| 509 | if (lenp) |
| 510 | *lenp = self->size; |
| 511 | return 1; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | static int |
| 515 | mmap_buffer_getcharbuffer(self, index, ptr) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 516 | mmap_object *self; |
| 517 | int index; |
| 518 | const void **ptr; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 519 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 520 | if ( index != 0 ) { |
| 521 | PyErr_SetString(PyExc_SystemError, |
| 522 | "accessing non-existent buffer segment"); |
| 523 | return -1; |
| 524 | } |
| 525 | *ptr = (const char *)self->data; |
| 526 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 527 | } |
| 528 | |
| 529 | static PyObject * |
| 530 | mmap_object_getattr(mmap_object * self, char * name) |
| 531 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 532 | return Py_FindMethod (mmap_object_methods, (PyObject *)self, name); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | static int |
| 536 | mmap_length(self) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 537 | mmap_object *self; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 538 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 539 | CHECK_VALID(-1); |
| 540 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static PyObject * |
| 544 | mmap_item(self, i) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 545 | mmap_object *self; |
| 546 | int i; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 547 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 548 | CHECK_VALID(NULL); |
| 549 | if (i < 0 || i >= self->size) { |
| 550 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 551 | return NULL; |
| 552 | } |
| 553 | return PyString_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | static PyObject * |
| 557 | mmap_slice(self, ilow, ihigh) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 558 | mmap_object *self; |
| 559 | int ilow, ihigh; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 560 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 561 | CHECK_VALID(NULL); |
| 562 | if (ilow < 0) |
| 563 | ilow = 0; |
| 564 | else if (ilow > self->size) |
| 565 | ilow = self->size; |
| 566 | if (ihigh < 0) |
| 567 | ihigh = 0; |
| 568 | if (ihigh < ilow) |
| 569 | ihigh = ilow; |
| 570 | else if (ihigh > self->size) |
| 571 | ihigh = self->size; |
| 572 | |
| 573 | return PyString_FromStringAndSize(self->data + ilow, ihigh-ilow); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | static PyObject * |
| 577 | mmap_concat(self, bb) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 578 | mmap_object *self; |
| 579 | PyObject *bb; |
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 | CHECK_VALID(NULL); |
| 582 | PyErr_SetString(PyExc_SystemError, |
| 583 | "mmaps don't support concatenation"); |
| 584 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | static PyObject * |
| 588 | mmap_repeat(self, n) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 589 | mmap_object *self; |
| 590 | int n; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 591 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 592 | CHECK_VALID(NULL); |
| 593 | PyErr_SetString(PyExc_SystemError, |
| 594 | "mmaps don't support repeat operation"); |
| 595 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | static int |
| 599 | mmap_ass_slice(self, ilow, ihigh, v) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 600 | mmap_object *self; |
| 601 | int ilow, ihigh; |
| 602 | PyObject *v; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 603 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 604 | const char *buf; |
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); |
| 607 | if (ilow < 0) |
| 608 | ilow = 0; |
| 609 | else if (ilow > self->size) |
| 610 | ilow = self->size; |
| 611 | if (ihigh < 0) |
| 612 | ihigh = 0; |
| 613 | if (ihigh < ilow) |
| 614 | ihigh = ilow; |
| 615 | else if (ihigh > self->size) |
| 616 | ihigh = self->size; |
| 617 | |
| 618 | if (! (PyString_Check(v)) ) { |
| 619 | PyErr_SetString(PyExc_IndexError, |
| 620 | "mmap slice assignment must be a string"); |
| 621 | return -1; |
| 622 | } |
| 623 | if ( PyString_Size(v) != (ihigh - ilow) ) { |
| 624 | PyErr_SetString(PyExc_IndexError, |
| 625 | "mmap slice assignment is wrong size"); |
| 626 | return -1; |
| 627 | } |
| 628 | buf = PyString_AsString(v); |
| 629 | memcpy(self->data + ilow, buf, ihigh-ilow); |
| 630 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | static int |
| 634 | mmap_ass_item(self, i, v) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 635 | mmap_object *self; |
| 636 | int i; |
| 637 | PyObject *v; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 638 | { |
Guido van Rossum | 36d4f8b | 2000-04-10 21:34:37 +0000 | [diff] [blame] | 639 | const char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 640 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 641 | CHECK_VALID(-1); |
| 642 | if (i < 0 || i >= self->size) { |
| 643 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 644 | return -1; |
| 645 | } |
| 646 | if (! (PyString_Check(v) && PyString_Size(v)==1) ) { |
| 647 | PyErr_SetString(PyExc_IndexError, |
| 648 | "mmap assignment must be single-character string"); |
| 649 | return -1; |
| 650 | } |
| 651 | buf = PyString_AsString(v); |
| 652 | self->data[i] = buf[0]; |
| 653 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | static PySequenceMethods mmap_as_sequence = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 657 | (inquiry)mmap_length, /*sq_length*/ |
| 658 | (binaryfunc)mmap_concat, /*sq_concat*/ |
| 659 | (intargfunc)mmap_repeat, /*sq_repeat*/ |
| 660 | (intargfunc)mmap_item, /*sq_item*/ |
| 661 | (intintargfunc)mmap_slice, /*sq_slice*/ |
| 662 | (intobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 663 | (intintobjargproc)mmap_ass_slice, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 664 | }; |
| 665 | |
| 666 | static PyBufferProcs mmap_as_buffer = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 667 | (getreadbufferproc)mmap_buffer_getreadbuf, |
| 668 | (getwritebufferproc)mmap_buffer_getwritebuf, |
| 669 | (getsegcountproc)mmap_buffer_getsegcount, |
| 670 | (getcharbufferproc)mmap_buffer_getcharbuffer, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 671 | }; |
| 672 | |
| 673 | static PyTypeObject mmap_object_type = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 674 | PyObject_HEAD_INIT(0) /* patched in module init */ |
| 675 | 0, /* ob_size */ |
| 676 | "mmap", /* tp_name */ |
| 677 | sizeof(mmap_object), /* tp_size */ |
| 678 | 0, /* tp_itemsize */ |
| 679 | /* methods */ |
| 680 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 681 | 0, /* tp_print */ |
| 682 | (getattrfunc) mmap_object_getattr, /* tp_getattr */ |
| 683 | 0, /* tp_setattr */ |
| 684 | 0, /* tp_compare */ |
| 685 | 0, /* tp_repr */ |
| 686 | 0, /* tp_as_number */ |
| 687 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 688 | 0, /*tp_as_mapping*/ |
| 689 | 0, /*tp_hash*/ |
| 690 | 0, /*tp_call*/ |
| 691 | 0, /*tp_str*/ |
| 692 | 0, /*tp_getattro*/ |
| 693 | 0, /*tp_setattro*/ |
| 694 | &mmap_as_buffer, /*tp_as_buffer*/ |
| 695 | Py_TPFLAGS_HAVE_GETCHARBUFFER, /*tp_flags*/ |
| 696 | 0, /*tp_doc*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 697 | }; |
| 698 | |
| 699 | #ifdef UNIX |
| 700 | static PyObject * |
| 701 | new_mmap_object (PyObject * self, PyObject * args, PyObject *kwdict) |
| 702 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 703 | mmap_object * m_obj; |
| 704 | unsigned long map_size; |
| 705 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
| 706 | char * filename; |
| 707 | int namelen; |
| 708 | char *keywords[] = {"file", "size", "flags", "prot", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 709 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 710 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, |
| 711 | "il|ii", keywords, |
| 712 | &fd, &map_size, &flags, &prot) |
| 713 | ) |
| 714 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 715 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 716 | m_obj = PyObject_New (mmap_object, &mmap_object_type); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 717 | if (m_obj == NULL) {return NULL;} |
| 718 | m_obj->size = (size_t) map_size; |
| 719 | m_obj->pos = (size_t) 0; |
| 720 | m_obj->data = mmap(NULL, map_size, |
| 721 | prot, flags, |
| 722 | fd, 0); |
| 723 | if (m_obj->data == (void *)-1) |
| 724 | { |
| 725 | Py_DECREF(m_obj); |
| 726 | PyErr_SetFromErrno(mmap_module_error); |
| 727 | return NULL; |
| 728 | } |
| 729 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 730 | } |
| 731 | #endif /* UNIX */ |
| 732 | |
| 733 | #ifdef MS_WIN32 |
| 734 | static PyObject * |
| 735 | new_mmap_object (PyObject * self, PyObject * args) |
| 736 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 737 | mmap_object * m_obj; |
| 738 | unsigned long map_size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 739 | char * tagname = ""; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 740 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 741 | DWORD dwErr = 0; |
| 742 | int fileno; |
| 743 | HFILE fh = 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 744 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 745 | /* Patch the object type */ |
| 746 | mmap_object_type.ob_type = &PyType_Type; |
| 747 | |
| 748 | if (!PyArg_ParseTuple(args, |
| 749 | "il|z", |
| 750 | &fileno, |
| 751 | &map_size, |
| 752 | &tagname) |
| 753 | ) |
| 754 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 755 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 756 | /* if an actual filename has been specified */ |
| 757 | if (fileno != 0) { |
| 758 | fh = _get_osfhandle(fileno); |
| 759 | if (fh==-1) { |
| 760 | PyErr_SetFromErrno(mmap_module_error); |
| 761 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 762 | } |
Fred Drake | 1ef4e2d | 2000-04-05 14:15:31 +0000 | [diff] [blame] | 763 | /* Win9x appears to need us seeked to zero */ |
| 764 | fseek(&_iob[fileno], 0, SEEK_SET); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 765 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 766 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 767 | m_obj = PyObject_New (mmap_object, &mmap_object_type); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 768 | |
| 769 | if (fh) { |
| 770 | m_obj->file_handle = fh; |
| 771 | if (!map_size) { |
| 772 | m_obj->size = GetFileSize ((HANDLE)fh, NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 773 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 774 | m_obj->size = map_size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 775 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 776 | } |
| 777 | else { |
| 778 | m_obj->file_handle = (HFILE) 0xFFFFFFFF; |
| 779 | m_obj->size = map_size; |
| 780 | } |
| 781 | |
| 782 | /* set the initial position */ |
| 783 | m_obj->pos = (size_t) 0; |
| 784 | |
| 785 | m_obj->map_handle = CreateFileMapping ((HANDLE) m_obj->file_handle, |
| 786 | NULL, |
| 787 | PAGE_READWRITE, |
| 788 | 0, |
| 789 | m_obj->size, |
| 790 | tagname); |
| 791 | if (m_obj->map_handle != NULL) { |
| 792 | m_obj->data = (char *) MapViewOfFile (m_obj->map_handle, |
| 793 | FILE_MAP_WRITE, |
| 794 | 0, |
| 795 | 0, |
| 796 | 0); |
| 797 | if (m_obj->data != NULL) { |
| 798 | return ((PyObject *) m_obj); |
| 799 | } else { |
| 800 | dwErr = GetLastError(); |
| 801 | } |
| 802 | } else { |
| 803 | dwErr = GetLastError(); |
| 804 | } |
| 805 | PyErr_SetFromWindowsErr(dwErr); |
| 806 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 807 | } |
| 808 | #endif /* MS_WIN32 */ |
| 809 | |
| 810 | /* List of functions exported by this module */ |
| 811 | static struct PyMethodDef mmap_functions[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 812 | {"mmap", (PyCFunction) new_mmap_object, |
| 813 | METH_VARARGS|METH_KEYWORDS}, |
| 814 | {NULL, NULL} /* Sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 815 | }; |
| 816 | |
| 817 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 818 | __declspec(dllexport) void |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 819 | #endif /* MS_WIN32 */ |
| 820 | #ifdef UNIX |
| 821 | extern void |
| 822 | #endif |
| 823 | |
| 824 | initmmap(void) |
| 825 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 826 | PyObject *dict, *module; |
| 827 | module = Py_InitModule ("mmap", mmap_functions); |
| 828 | dict = PyModule_GetDict (module); |
| 829 | mmap_module_error = PyExc_EnvironmentError; |
| 830 | Py_INCREF(mmap_module_error); |
| 831 | PyDict_SetItemString (dict, "error", mmap_module_error); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 832 | #ifdef PROT_EXEC |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 833 | PyDict_SetItemString (dict, "PROT_EXEC", PyInt_FromLong(PROT_EXEC) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 834 | #endif |
| 835 | #ifdef PROT_READ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 836 | PyDict_SetItemString (dict, "PROT_READ", PyInt_FromLong(PROT_READ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 837 | #endif |
| 838 | #ifdef PROT_WRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 839 | PyDict_SetItemString (dict, "PROT_WRITE", PyInt_FromLong(PROT_WRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 840 | #endif |
| 841 | |
| 842 | #ifdef MAP_SHARED |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 843 | PyDict_SetItemString (dict, "MAP_SHARED", PyInt_FromLong(MAP_SHARED) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 844 | #endif |
| 845 | #ifdef MAP_PRIVATE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 846 | PyDict_SetItemString (dict, "MAP_PRIVATE", |
| 847 | PyInt_FromLong(MAP_PRIVATE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 848 | #endif |
| 849 | #ifdef MAP_DENYWRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 850 | PyDict_SetItemString (dict, "MAP_DENYWRITE", |
| 851 | PyInt_FromLong(MAP_DENYWRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 852 | #endif |
| 853 | #ifdef MAP_EXECUTABLE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 854 | PyDict_SetItemString (dict, "MAP_EXECUTABLE", |
| 855 | PyInt_FromLong(MAP_EXECUTABLE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 856 | #endif |
| 857 | #ifdef MAP_ANON |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 858 | PyDict_SetItemString (dict, "MAP_ANON", PyInt_FromLong(MAP_ANON) ); |
| 859 | PyDict_SetItemString (dict, "MAP_ANONYMOUS", |
| 860 | PyInt_FromLong(MAP_ANON) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 861 | #endif |
| 862 | |
| 863 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 864 | PyDict_SetItemString (dict, "PAGESIZE", |
| 865 | PyInt_FromLong( (long)getpagesize() ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 866 | #endif |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 867 | #ifdef MS_WIN32 |
| 868 | { |
| 869 | SYSTEM_INFO si; |
| 870 | GetSystemInfo(&si); |
| 871 | PyDict_SetItemString (dict, "PAGESIZE", |
| 872 | PyInt_FromLong( si.dwPageSize ) ); |
| 873 | } |
| 874 | #endif /* MS_WIN32 */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 875 | |
| 876 | } |
Andrew M. Kuchling | 961fe17 | 2000-06-03 19:41:42 +0000 | [diff] [blame^] | 877 | |