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 | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 72 | PyMem_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 | { |
| 78 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 79 | UnmapViewOfFile (self->data); |
| 80 | CloseHandle (self->map_handle); |
| 81 | CloseHandle ((HANDLE)self->file_handle); |
| 82 | self->map_handle = (HANDLE) NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 83 | #endif /* MS_WIN32 */ |
| 84 | |
| 85 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 86 | munmap(self->data, self->size); |
| 87 | self->data = NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 88 | #endif |
| 89 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 90 | Py_INCREF (Py_None); |
| 91 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 95 | #define CHECK_VALID(err) \ |
| 96 | do { \ |
| 97 | if (!self->map_handle) { \ |
| 98 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 99 | return err; \ |
| 100 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 101 | } while (0) |
| 102 | #endif /* MS_WIN32 */ |
| 103 | |
| 104 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 105 | #define CHECK_VALID(err) \ |
| 106 | do { \ |
| 107 | if (self->data == NULL) { \ |
| 108 | PyErr_SetString (PyExc_ValueError, "mmap closed or invalid"); \ |
| 109 | return err; \ |
| 110 | } \ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 111 | } while (0) |
| 112 | #endif /* UNIX */ |
| 113 | |
| 114 | static PyObject * |
| 115 | mmap_read_byte_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 116 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 117 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 118 | char value; |
| 119 | char * where = (self->data+self->pos); |
| 120 | CHECK_VALID(NULL); |
| 121 | if ((where >= 0) && (where < (self->data+self->size))) { |
| 122 | value = (char) *(where); |
| 123 | self->pos += 1; |
| 124 | return Py_BuildValue("c", (char) *(where)); |
| 125 | } else { |
| 126 | PyErr_SetString (PyExc_ValueError, "read byte out of range"); |
| 127 | return NULL; |
| 128 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | static PyObject * |
| 132 | mmap_read_line_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 133 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 134 | { |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 135 | char * start = self->data+self->pos; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 136 | char * eof = self->data+self->size; |
| 137 | char * eol; |
| 138 | PyObject * result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 139 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 140 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 141 | |
Fred Drake | 56a87a0 | 2000-04-04 18:17:35 +0000 | [diff] [blame] | 142 | eol = memchr(start, '\n', self->size - self->pos); |
| 143 | if (!eol) |
| 144 | eol = eof; |
| 145 | else |
| 146 | ++eol; /* we're interested in the position after the |
| 147 | newline. */ |
| 148 | result = PyString_FromStringAndSize(start, (long) (eol - start)); |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 149 | self->pos += (eol - start); |
| 150 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | static PyObject * |
| 154 | mmap_read_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 155 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 156 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 157 | long num_bytes; |
| 158 | PyObject *result; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 159 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 160 | CHECK_VALID(NULL); |
| 161 | if (!PyArg_ParseTuple (args, "l", &num_bytes)) |
| 162 | return(NULL); |
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 | /* silently 'adjust' out-of-range requests */ |
| 165 | if ((self->pos + num_bytes) > self->size) { |
| 166 | num_bytes -= (self->pos+num_bytes) - self->size; |
| 167 | } |
| 168 | result = Py_BuildValue("s#", self->data+self->pos, num_bytes); |
| 169 | self->pos += num_bytes; |
| 170 | return (result); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | static PyObject * |
| 174 | mmap_find_method (mmap_object *self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 175 | PyObject *args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 176 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 177 | long start = self->pos; |
| 178 | char * needle; |
| 179 | int len; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 180 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 181 | CHECK_VALID(NULL); |
| 182 | if (!PyArg_ParseTuple (args, "s#|l", &needle, &len, &start)) { |
| 183 | return NULL; |
| 184 | } else { |
| 185 | char * p = self->data+self->pos; |
| 186 | char * e = self->data+self->size; |
| 187 | while (p < e) { |
| 188 | char * s = p; |
| 189 | char * n = needle; |
| 190 | while ((s<e) && (*n) && !(*s-*n)) { |
| 191 | s++, n++; |
| 192 | } |
| 193 | if (!*n) { |
| 194 | return Py_BuildValue ( |
| 195 | "l", |
| 196 | (long) (p - (self->data + start))); |
| 197 | } |
| 198 | p++; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 199 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 200 | return Py_BuildValue ("l", (long) -1); |
| 201 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static PyObject * |
| 205 | mmap_write_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 206 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 207 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 208 | long length; |
| 209 | char * data; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 210 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 211 | CHECK_VALID(NULL); |
| 212 | if (!PyArg_ParseTuple (args, "s#", &data, &length)) |
| 213 | return(NULL); |
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 | if ((self->pos + length) > self->size) { |
| 216 | PyErr_SetString (PyExc_ValueError, "data out of range"); |
| 217 | return NULL; |
| 218 | } |
| 219 | memcpy (self->data+self->pos, data, length); |
| 220 | self->pos = self->pos+length; |
| 221 | Py_INCREF (Py_None); |
| 222 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | static PyObject * |
| 226 | mmap_write_byte_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 227 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 228 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 229 | char value; |
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 | CHECK_VALID(NULL); |
| 232 | if (!PyArg_ParseTuple (args, "c", &value)) |
| 233 | return(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 234 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 235 | *(self->data+self->pos) = value; |
| 236 | self->pos += 1; |
| 237 | Py_INCREF (Py_None); |
| 238 | return (Py_None); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static PyObject * |
| 242 | mmap_size_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 243 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 244 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 245 | CHECK_VALID(NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 246 | |
| 247 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 248 | if (self->file_handle != (HFILE) 0xFFFFFFFF) { |
| 249 | return (Py_BuildValue ( |
| 250 | "l", |
| 251 | GetFileSize ((HANDLE)self->file_handle, NULL))); |
| 252 | } else { |
| 253 | return (Py_BuildValue ("l", self->size) ); |
| 254 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 255 | #endif /* MS_WIN32 */ |
| 256 | |
| 257 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 258 | return (Py_BuildValue ("l", self->size) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 259 | #endif /* UNIX */ |
| 260 | } |
| 261 | |
| 262 | /* This assumes that you want the entire file mapped, |
| 263 | / and when recreating the map will make the new file |
| 264 | / have the new size |
| 265 | / |
| 266 | / Is this really necessary? This could easily be done |
| 267 | / from python by just closing and re-opening with the |
| 268 | / new size? |
| 269 | */ |
| 270 | |
| 271 | static PyObject * |
| 272 | mmap_resize_method (mmap_object * self, |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 273 | PyObject * args) |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 274 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 275 | unsigned long new_size; |
| 276 | CHECK_VALID(NULL); |
| 277 | if (!PyArg_ParseTuple (args, "l", &new_size)) { |
| 278 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 279 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 280 | } else { |
| 281 | DWORD dwErrCode = 0; |
| 282 | /* First, unmap the file view */ |
| 283 | UnmapViewOfFile (self->data); |
| 284 | /* Close the mapping object */ |
| 285 | CloseHandle ((HANDLE)self->map_handle); |
| 286 | /* Move to the desired EOF position */ |
| 287 | SetFilePointer ((HANDLE)self->file_handle, |
| 288 | new_size, NULL, FILE_BEGIN); |
| 289 | /* Change the size of the file */ |
| 290 | SetEndOfFile ((HANDLE)self->file_handle); |
| 291 | /* Create another mapping object and remap the file view */ |
| 292 | self->map_handle = CreateFileMapping ( |
| 293 | (HANDLE) self->file_handle, |
| 294 | NULL, |
| 295 | PAGE_READWRITE, |
| 296 | 0, |
| 297 | new_size, |
| 298 | self->tagname); |
| 299 | if (self->map_handle != NULL) { |
| 300 | self->data = (char *) MapViewOfFile (self->map_handle, |
| 301 | FILE_MAP_WRITE, |
| 302 | 0, |
| 303 | 0, |
| 304 | 0); |
| 305 | if (self->data != NULL) { |
| 306 | self->size = new_size; |
| 307 | Py_INCREF (Py_None); |
| 308 | return Py_None; |
| 309 | } else { |
| 310 | dwErrCode = GetLastError(); |
| 311 | } |
| 312 | } else { |
| 313 | dwErrCode = GetLastError(); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 314 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 315 | PyErr_SetFromWindowsErr(dwErrCode); |
| 316 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 317 | #endif /* MS_WIN32 */ |
| 318 | |
| 319 | #ifdef UNIX |
| 320 | #ifndef MREMAP_MAYMOVE |
| 321 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 322 | PyErr_SetString(PyExc_SystemError, |
| 323 | "mmap: resizing not available--no mremap()"); |
| 324 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 325 | #else |
| 326 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 327 | void *newmap; |
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 | newmap = mremap(self->data, self->size, new_size, MREMAP_MAYMOVE); |
| 330 | if (newmap == (void *)-1) |
| 331 | { |
| 332 | PyErr_SetFromErrno(mmap_module_error); |
| 333 | return NULL; |
| 334 | } |
| 335 | self->data = newmap; |
| 336 | self->size = new_size; |
| 337 | Py_INCREF(Py_None); |
| 338 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 339 | #endif /* MREMAP_MAYMOVE */ |
| 340 | #endif /* UNIX */ |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | static PyObject * |
| 345 | mmap_tell_method (mmap_object * self, PyObject * args) |
| 346 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 347 | CHECK_VALID(NULL); |
| 348 | return (Py_BuildValue ("l", self->pos) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | static PyObject * |
| 352 | mmap_flush_method (mmap_object * self, PyObject * args) |
| 353 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 354 | size_t offset = 0; |
| 355 | size_t size = self->size; |
| 356 | CHECK_VALID(NULL); |
| 357 | if (!PyArg_ParseTuple (args, "|ll", &offset, &size)) { |
| 358 | return NULL; |
| 359 | } else if ((offset + size) > self->size) { |
| 360 | PyErr_SetString (PyExc_ValueError, |
| 361 | "flush values out of range"); |
| 362 | return NULL; |
| 363 | } else { |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 364 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 365 | return (Py_BuildValue ( |
| 366 | "l", FlushViewOfFile (self->data+offset, size))); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 367 | #endif /* MS_WIN32 */ |
| 368 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 369 | /* XXX semantics of return value? */ |
| 370 | /* XXX flags for msync? */ |
| 371 | if (-1 == msync(self->data + offset, size, |
| 372 | MS_SYNC | MS_INVALIDATE)) |
| 373 | { |
| 374 | PyErr_SetFromErrno(mmap_module_error); |
| 375 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 376 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 377 | return Py_BuildValue ("l", 0); |
| 378 | #endif /* UNIX */ |
| 379 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | static PyObject * |
| 383 | mmap_seek_method (mmap_object * self, PyObject * args) |
| 384 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 385 | /* ptrdiff_t dist; */ |
| 386 | long dist; |
| 387 | int how=0; |
| 388 | CHECK_VALID(NULL); |
| 389 | if (!PyArg_ParseTuple (args, "l|i", &dist, &how)) { |
| 390 | return(NULL); |
| 391 | } else { |
| 392 | unsigned long where; |
| 393 | switch (how) { |
| 394 | case 0: |
| 395 | where = dist; |
| 396 | break; |
| 397 | case 1: |
| 398 | where = self->pos + dist; |
| 399 | break; |
| 400 | case 2: |
| 401 | where = self->size - dist; |
| 402 | break; |
| 403 | default: |
| 404 | PyErr_SetString (PyExc_ValueError, |
| 405 | "unknown seek type"); |
| 406 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 407 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 408 | if ((where >= 0) && (where < (self->size))) { |
| 409 | self->pos = where; |
| 410 | Py_INCREF (Py_None); |
| 411 | return (Py_None); |
| 412 | } else { |
| 413 | PyErr_SetString (PyExc_ValueError, |
| 414 | "seek out of range"); |
| 415 | return NULL; |
| 416 | } |
| 417 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | static PyObject * |
| 421 | mmap_move_method (mmap_object * self, PyObject * args) |
| 422 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 423 | unsigned long dest, src, count; |
| 424 | CHECK_VALID(NULL); |
| 425 | if (!PyArg_ParseTuple (args, "iii", &dest, &src, &count)) { |
| 426 | return NULL; |
| 427 | } else { |
| 428 | /* bounds check the values */ |
| 429 | if (/* end of source after end of data?? */ |
| 430 | ((src+count) > self->size) |
| 431 | /* dest will fit? */ |
| 432 | || (dest+count > self->size)) { |
| 433 | PyErr_SetString (PyExc_ValueError, |
| 434 | "source or destination out of range"); |
| 435 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 436 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 437 | memmove (self->data+dest, self->data+src, count); |
| 438 | Py_INCREF (Py_None); |
| 439 | return Py_None; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 440 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 441 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | static struct PyMethodDef mmap_object_methods[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 445 | {"close", (PyCFunction) mmap_close_method, 1}, |
| 446 | {"find", (PyCFunction) mmap_find_method, 1}, |
| 447 | {"flush", (PyCFunction) mmap_flush_method, 1}, |
| 448 | {"move", (PyCFunction) mmap_move_method, 1}, |
| 449 | {"read", (PyCFunction) mmap_read_method, 1}, |
| 450 | {"read_byte", (PyCFunction) mmap_read_byte_method, 1}, |
| 451 | {"readline", (PyCFunction) mmap_read_line_method, 1}, |
| 452 | {"resize", (PyCFunction) mmap_resize_method, 1}, |
| 453 | {"seek", (PyCFunction) mmap_seek_method, 1}, |
| 454 | {"size", (PyCFunction) mmap_size_method, 1}, |
| 455 | {"tell", (PyCFunction) mmap_tell_method, 1}, |
| 456 | {"write", (PyCFunction) mmap_write_method, 1}, |
| 457 | {"write_byte", (PyCFunction) mmap_write_byte_method, 1}, |
| 458 | {NULL, NULL} /* sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 459 | }; |
| 460 | |
| 461 | /* Functions for treating an mmap'ed file as a buffer */ |
| 462 | |
| 463 | static int |
| 464 | mmap_buffer_getreadbuf(self, index, ptr) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 465 | mmap_object *self; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 466 | int index; |
| 467 | const void **ptr; |
| 468 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 469 | CHECK_VALID(-1); |
| 470 | if ( index != 0 ) { |
| 471 | PyErr_SetString(PyExc_SystemError, |
| 472 | "Accessing non-existent mmap segment"); |
| 473 | return -1; |
| 474 | } |
| 475 | *ptr = self->data; |
| 476 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | static int |
| 480 | mmap_buffer_getwritebuf(self, index, ptr) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 481 | mmap_object *self; |
| 482 | int index; |
| 483 | const void **ptr; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 484 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 485 | CHECK_VALID(-1); |
| 486 | if ( index != 0 ) { |
| 487 | PyErr_SetString(PyExc_SystemError, |
| 488 | "Accessing non-existent mmap segment"); |
| 489 | return -1; |
| 490 | } |
| 491 | *ptr = self->data; |
| 492 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static int |
| 496 | mmap_buffer_getsegcount(self, lenp) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 497 | mmap_object *self; |
| 498 | int *lenp; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 499 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 500 | CHECK_VALID(-1); |
| 501 | if (lenp) |
| 502 | *lenp = self->size; |
| 503 | return 1; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | static int |
| 507 | mmap_buffer_getcharbuffer(self, index, ptr) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 508 | mmap_object *self; |
| 509 | int index; |
| 510 | const void **ptr; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 511 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 512 | if ( index != 0 ) { |
| 513 | PyErr_SetString(PyExc_SystemError, |
| 514 | "accessing non-existent buffer segment"); |
| 515 | return -1; |
| 516 | } |
| 517 | *ptr = (const char *)self->data; |
| 518 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | static PyObject * |
| 522 | mmap_object_getattr(mmap_object * self, char * name) |
| 523 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 524 | return Py_FindMethod (mmap_object_methods, (PyObject *)self, name); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | static int |
| 528 | mmap_length(self) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 529 | mmap_object *self; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 530 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 531 | CHECK_VALID(-1); |
| 532 | return self->size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | static PyObject * |
| 536 | mmap_item(self, i) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 537 | mmap_object *self; |
| 538 | int i; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 539 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 540 | CHECK_VALID(NULL); |
| 541 | if (i < 0 || i >= self->size) { |
| 542 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 543 | return NULL; |
| 544 | } |
| 545 | return PyString_FromStringAndSize(self->data + i, 1); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | static PyObject * |
| 549 | mmap_slice(self, ilow, ihigh) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 550 | mmap_object *self; |
| 551 | int ilow, ihigh; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 552 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 553 | CHECK_VALID(NULL); |
| 554 | if (ilow < 0) |
| 555 | ilow = 0; |
| 556 | else if (ilow > self->size) |
| 557 | ilow = self->size; |
| 558 | if (ihigh < 0) |
| 559 | ihigh = 0; |
| 560 | if (ihigh < ilow) |
| 561 | ihigh = ilow; |
| 562 | else if (ihigh > self->size) |
| 563 | ihigh = self->size; |
| 564 | |
| 565 | return PyString_FromStringAndSize(self->data + ilow, ihigh-ilow); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | static PyObject * |
| 569 | mmap_concat(self, bb) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 570 | mmap_object *self; |
| 571 | PyObject *bb; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 572 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 573 | CHECK_VALID(NULL); |
| 574 | PyErr_SetString(PyExc_SystemError, |
| 575 | "mmaps don't support concatenation"); |
| 576 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | static PyObject * |
| 580 | mmap_repeat(self, n) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 581 | mmap_object *self; |
| 582 | int n; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 583 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 584 | CHECK_VALID(NULL); |
| 585 | PyErr_SetString(PyExc_SystemError, |
| 586 | "mmaps don't support repeat operation"); |
| 587 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 588 | } |
| 589 | |
| 590 | static int |
| 591 | mmap_ass_slice(self, ilow, ihigh, v) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 592 | mmap_object *self; |
| 593 | int ilow, ihigh; |
| 594 | PyObject *v; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 595 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 596 | unsigned char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 597 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 598 | CHECK_VALID(-1); |
| 599 | if (ilow < 0) |
| 600 | ilow = 0; |
| 601 | else if (ilow > self->size) |
| 602 | ilow = self->size; |
| 603 | if (ihigh < 0) |
| 604 | ihigh = 0; |
| 605 | if (ihigh < ilow) |
| 606 | ihigh = ilow; |
| 607 | else if (ihigh > self->size) |
| 608 | ihigh = self->size; |
| 609 | |
| 610 | if (! (PyString_Check(v)) ) { |
| 611 | PyErr_SetString(PyExc_IndexError, |
| 612 | "mmap slice assignment must be a string"); |
| 613 | return -1; |
| 614 | } |
| 615 | if ( PyString_Size(v) != (ihigh - ilow) ) { |
| 616 | PyErr_SetString(PyExc_IndexError, |
| 617 | "mmap slice assignment is wrong size"); |
| 618 | return -1; |
| 619 | } |
| 620 | buf = PyString_AsString(v); |
| 621 | memcpy(self->data + ilow, buf, ihigh-ilow); |
| 622 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | static int |
| 626 | mmap_ass_item(self, i, v) |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 627 | mmap_object *self; |
| 628 | int i; |
| 629 | PyObject *v; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 630 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 631 | unsigned char *buf; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 632 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 633 | CHECK_VALID(-1); |
| 634 | if (i < 0 || i >= self->size) { |
| 635 | PyErr_SetString(PyExc_IndexError, "mmap index out of range"); |
| 636 | return -1; |
| 637 | } |
| 638 | if (! (PyString_Check(v) && PyString_Size(v)==1) ) { |
| 639 | PyErr_SetString(PyExc_IndexError, |
| 640 | "mmap assignment must be single-character string"); |
| 641 | return -1; |
| 642 | } |
| 643 | buf = PyString_AsString(v); |
| 644 | self->data[i] = buf[0]; |
| 645 | return 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | static PySequenceMethods mmap_as_sequence = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 649 | (inquiry)mmap_length, /*sq_length*/ |
| 650 | (binaryfunc)mmap_concat, /*sq_concat*/ |
| 651 | (intargfunc)mmap_repeat, /*sq_repeat*/ |
| 652 | (intargfunc)mmap_item, /*sq_item*/ |
| 653 | (intintargfunc)mmap_slice, /*sq_slice*/ |
| 654 | (intobjargproc)mmap_ass_item, /*sq_ass_item*/ |
| 655 | (intintobjargproc)mmap_ass_slice, /*sq_ass_slice*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 656 | }; |
| 657 | |
| 658 | static PyBufferProcs mmap_as_buffer = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 659 | (getreadbufferproc)mmap_buffer_getreadbuf, |
| 660 | (getwritebufferproc)mmap_buffer_getwritebuf, |
| 661 | (getsegcountproc)mmap_buffer_getsegcount, |
| 662 | (getcharbufferproc)mmap_buffer_getcharbuffer, |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 663 | }; |
| 664 | |
| 665 | static PyTypeObject mmap_object_type = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 666 | PyObject_HEAD_INIT(0) /* patched in module init */ |
| 667 | 0, /* ob_size */ |
| 668 | "mmap", /* tp_name */ |
| 669 | sizeof(mmap_object), /* tp_size */ |
| 670 | 0, /* tp_itemsize */ |
| 671 | /* methods */ |
| 672 | (destructor) mmap_object_dealloc, /* tp_dealloc */ |
| 673 | 0, /* tp_print */ |
| 674 | (getattrfunc) mmap_object_getattr, /* tp_getattr */ |
| 675 | 0, /* tp_setattr */ |
| 676 | 0, /* tp_compare */ |
| 677 | 0, /* tp_repr */ |
| 678 | 0, /* tp_as_number */ |
| 679 | &mmap_as_sequence, /*tp_as_sequence*/ |
| 680 | 0, /*tp_as_mapping*/ |
| 681 | 0, /*tp_hash*/ |
| 682 | 0, /*tp_call*/ |
| 683 | 0, /*tp_str*/ |
| 684 | 0, /*tp_getattro*/ |
| 685 | 0, /*tp_setattro*/ |
| 686 | &mmap_as_buffer, /*tp_as_buffer*/ |
| 687 | Py_TPFLAGS_HAVE_GETCHARBUFFER, /*tp_flags*/ |
| 688 | 0, /*tp_doc*/ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 689 | }; |
| 690 | |
| 691 | #ifdef UNIX |
| 692 | static PyObject * |
| 693 | new_mmap_object (PyObject * self, PyObject * args, PyObject *kwdict) |
| 694 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 695 | mmap_object * m_obj; |
| 696 | unsigned long map_size; |
| 697 | int fd, flags = MAP_SHARED, prot = PROT_WRITE | PROT_READ; |
| 698 | char * filename; |
| 699 | int namelen; |
| 700 | char *keywords[] = {"file", "size", "flags", "prot", NULL}; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 701 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 702 | if (!PyArg_ParseTupleAndKeywords(args, kwdict, |
| 703 | "il|ii", keywords, |
| 704 | &fd, &map_size, &flags, &prot) |
| 705 | ) |
| 706 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 707 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 708 | m_obj = PyObject_NEW (mmap_object, &mmap_object_type); |
| 709 | if (m_obj == NULL) {return NULL;} |
| 710 | m_obj->size = (size_t) map_size; |
| 711 | m_obj->pos = (size_t) 0; |
| 712 | m_obj->data = mmap(NULL, map_size, |
| 713 | prot, flags, |
| 714 | fd, 0); |
| 715 | if (m_obj->data == (void *)-1) |
| 716 | { |
| 717 | Py_DECREF(m_obj); |
| 718 | PyErr_SetFromErrno(mmap_module_error); |
| 719 | return NULL; |
| 720 | } |
| 721 | return (PyObject *)m_obj; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 722 | } |
| 723 | #endif /* UNIX */ |
| 724 | |
| 725 | #ifdef MS_WIN32 |
| 726 | static PyObject * |
| 727 | new_mmap_object (PyObject * self, PyObject * args) |
| 728 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 729 | mmap_object * m_obj; |
| 730 | unsigned long map_size; |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 731 | char * tagname = ""; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 732 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 733 | DWORD dwErr = 0; |
| 734 | int fileno; |
| 735 | HFILE fh = 0; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 736 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 737 | /* Patch the object type */ |
| 738 | mmap_object_type.ob_type = &PyType_Type; |
| 739 | |
| 740 | if (!PyArg_ParseTuple(args, |
| 741 | "il|z", |
| 742 | &fileno, |
| 743 | &map_size, |
| 744 | &tagname) |
| 745 | ) |
| 746 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 747 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 748 | /* if an actual filename has been specified */ |
| 749 | if (fileno != 0) { |
| 750 | fh = _get_osfhandle(fileno); |
| 751 | if (fh==-1) { |
| 752 | PyErr_SetFromErrno(mmap_module_error); |
| 753 | return NULL; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 754 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 755 | // |
| 756 | // fh = OpenFile (filename, &file_info, OF_READWRITE); |
| 757 | // if (fh == HFILE_ERROR) { |
| 758 | // PyErr_SetFromWindowsErr(GetLastError()); |
| 759 | // return NULL; |
| 760 | // } |
| 761 | } |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 762 | |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 763 | m_obj = PyObject_NEW (mmap_object, &mmap_object_type); |
| 764 | |
| 765 | if (fh) { |
| 766 | m_obj->file_handle = fh; |
| 767 | if (!map_size) { |
| 768 | m_obj->size = GetFileSize ((HANDLE)fh, NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 769 | } else { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 770 | m_obj->size = map_size; |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 771 | } |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 772 | } |
| 773 | else { |
| 774 | m_obj->file_handle = (HFILE) 0xFFFFFFFF; |
| 775 | m_obj->size = map_size; |
| 776 | } |
| 777 | |
| 778 | /* set the initial position */ |
| 779 | m_obj->pos = (size_t) 0; |
| 780 | |
| 781 | m_obj->map_handle = CreateFileMapping ((HANDLE) m_obj->file_handle, |
| 782 | NULL, |
| 783 | PAGE_READWRITE, |
| 784 | 0, |
| 785 | m_obj->size, |
| 786 | tagname); |
| 787 | if (m_obj->map_handle != NULL) { |
| 788 | m_obj->data = (char *) MapViewOfFile (m_obj->map_handle, |
| 789 | FILE_MAP_WRITE, |
| 790 | 0, |
| 791 | 0, |
| 792 | 0); |
| 793 | if (m_obj->data != NULL) { |
| 794 | return ((PyObject *) m_obj); |
| 795 | } else { |
| 796 | dwErr = GetLastError(); |
| 797 | } |
| 798 | } else { |
| 799 | dwErr = GetLastError(); |
| 800 | } |
| 801 | PyErr_SetFromWindowsErr(dwErr); |
| 802 | return (NULL); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 803 | } |
| 804 | #endif /* MS_WIN32 */ |
| 805 | |
| 806 | /* List of functions exported by this module */ |
| 807 | static struct PyMethodDef mmap_functions[] = { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 808 | {"mmap", (PyCFunction) new_mmap_object, |
| 809 | METH_VARARGS|METH_KEYWORDS}, |
| 810 | {NULL, NULL} /* Sentinel */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 811 | }; |
| 812 | |
| 813 | #ifdef MS_WIN32 |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 814 | __declspec(dllexport) void |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 815 | #endif /* MS_WIN32 */ |
| 816 | #ifdef UNIX |
| 817 | extern void |
| 818 | #endif |
| 819 | |
| 820 | initmmap(void) |
| 821 | { |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 822 | PyObject *dict, *module; |
| 823 | module = Py_InitModule ("mmap", mmap_functions); |
| 824 | dict = PyModule_GetDict (module); |
| 825 | mmap_module_error = PyExc_EnvironmentError; |
| 826 | Py_INCREF(mmap_module_error); |
| 827 | PyDict_SetItemString (dict, "error", mmap_module_error); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 828 | #ifdef PROT_EXEC |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 829 | PyDict_SetItemString (dict, "PROT_EXEC", PyInt_FromLong(PROT_EXEC) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 830 | #endif |
| 831 | #ifdef PROT_READ |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 832 | PyDict_SetItemString (dict, "PROT_READ", PyInt_FromLong(PROT_READ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 833 | #endif |
| 834 | #ifdef PROT_WRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 835 | PyDict_SetItemString (dict, "PROT_WRITE", PyInt_FromLong(PROT_WRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 836 | #endif |
| 837 | |
| 838 | #ifdef MAP_SHARED |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 839 | PyDict_SetItemString (dict, "MAP_SHARED", PyInt_FromLong(MAP_SHARED) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 840 | #endif |
| 841 | #ifdef MAP_PRIVATE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 842 | PyDict_SetItemString (dict, "MAP_PRIVATE", |
| 843 | PyInt_FromLong(MAP_PRIVATE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 844 | #endif |
| 845 | #ifdef MAP_DENYWRITE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 846 | PyDict_SetItemString (dict, "MAP_DENYWRITE", |
| 847 | PyInt_FromLong(MAP_DENYWRITE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 848 | #endif |
| 849 | #ifdef MAP_EXECUTABLE |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 850 | PyDict_SetItemString (dict, "MAP_EXECUTABLE", |
| 851 | PyInt_FromLong(MAP_EXECUTABLE) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 852 | #endif |
| 853 | #ifdef MAP_ANON |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 854 | PyDict_SetItemString (dict, "MAP_ANON", PyInt_FromLong(MAP_ANON) ); |
| 855 | PyDict_SetItemString (dict, "MAP_ANONYMOUS", |
| 856 | PyInt_FromLong(MAP_ANON) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 857 | #endif |
| 858 | |
| 859 | #ifdef UNIX |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 860 | PyDict_SetItemString (dict, "PAGESIZE", |
| 861 | PyInt_FromLong( (long)getpagesize() ) ); |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 862 | #endif |
Guido van Rossum | 09fdf07 | 2000-03-31 01:17:07 +0000 | [diff] [blame] | 863 | #ifdef MS_WIN32 |
| 864 | { |
| 865 | SYSTEM_INFO si; |
| 866 | GetSystemInfo(&si); |
| 867 | PyDict_SetItemString (dict, "PAGESIZE", |
| 868 | PyInt_FromLong( si.dwPageSize ) ); |
| 869 | } |
| 870 | #endif /* MS_WIN32 */ |
Andrew M. Kuchling | 1ed7d2d | 2000-03-30 21:14:30 +0000 | [diff] [blame] | 871 | |
| 872 | } |