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Overview
Comment: | Implement xRemap for lsm1 on Win32. Also, zero file handle when closing it. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | lsm-vtab |
Files: | files | file ages | folders |
SHA3-256: |
93c9aa7d9aea46b331c53ff579ef704e |
User & Date: | mistachkin 2017-06-29 00:20:42.289 |
Context
2017-06-29
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12:54 | Implement xUnlink, xShmMap, and xShmUnmap for lsm1 on Win32. (Closed-Leaf check-in: 680cc064c9 user: mistachkin tags: lsm-vtab) | |
00:20 | Implement xRemap for lsm1 on Win32. Also, zero file handle when closing it. (check-in: 93c9aa7d9a user: mistachkin tags: lsm-vtab) | |
2017-06-28
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21:36 | Implement xLock and xTestLock for lsm1 on Win32. (check-in: 9112117dad user: mistachkin tags: lsm-vtab) | |
Changes
Changes to ext/lsm1/lsm_win32.c.
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35 36 37 38 39 40 41 | lsm_env *pEnv; /* The run-time environment */ const char *zName; /* Full path to file */ HANDLE hFile; /* Open file handle */ HANDLE hShmFile; /* File handle for *-shm file */ HANDLE hMap; /* File handle for mapping */ | | | 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | lsm_env *pEnv; /* The run-time environment */ const char *zName; /* Full path to file */ HANDLE hFile; /* Open file handle */ HANDLE hShmFile; /* File handle for *-shm file */ HANDLE hMap; /* File handle for mapping */ LPVOID pMap; /* Pointer to mapping of file fd */ size_t nMap; /* Size of mapping at pMap in bytes */ int nShm; /* Number of entries in array apShm[] */ void **apShm; /* Array of 32K shared memory segments */ }; static char *win32ShmFile(Win32File *p){ char *zShm; |
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287 288 289 290 291 292 293 | } static int lsmWin32OsTruncate( lsm_file *pFile, /* File to write to */ lsm_i64 nSize /* Size to truncate file to */ ){ Win32File *pWin32File = (Win32File *)pFile; | | | | | 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 | } static int lsmWin32OsTruncate( lsm_file *pFile, /* File to write to */ lsm_i64 nSize /* Size to truncate file to */ ){ Win32File *pWin32File = (Win32File *)pFile; LARGE_INTEGER offset; offset.QuadPart = nSize; if( !SetFilePointerEx(pWin32File->hFile, offset, 0, FILE_BEGIN) ){ return LSM_IOERR_BKPT; } if (!SetEndOfFile(pWin32File->hFile) ){ return LSM_IOERR_BKPT; } return LSM_OK; } |
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331 332 333 334 335 336 337 | static int lsmWin32OsSync(lsm_file *pFile){ int rc = LSM_OK; #ifndef LSM_NO_SYNC Win32File *pWin32File = (Win32File *)pFile; | | | 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 | static int lsmWin32OsSync(lsm_file *pFile){ int rc = LSM_OK; #ifndef LSM_NO_SYNC Win32File *pWin32File = (Win32File *)pFile; if( pWin32File->pMap!=NULL ){ if( !FlushViewOfFile(pWin32File->pMap, 0) ){ rc = LSM_IOERR_BKPT; } } if( rc==LSM_OK && !FlushFileBuffers(pWin32File->hFile) ){ rc = LSM_IOERR_BKPT; } |
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355 356 357 358 359 360 361 | static int lsmWin32OsRemap( lsm_file *pFile, lsm_i64 iMin, void **ppOut, lsm_i64 *pnOut ){ | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | | 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 | static int lsmWin32OsRemap( lsm_file *pFile, lsm_i64 iMin, void **ppOut, lsm_i64 *pnOut ){ Win32File *pWin32File = (Win32File *)pFile; /* If the file is between 0 and 2MB in size, extend it in chunks of 256K. ** Thereafter, in chunks of 1MB at a time. */ const int aIncrSz[] = {256*1024, 1024*1024}; int nIncrSz = aIncrSz[iMin>(2*1024*1024)]; if( pWin32File->pMap!=NULL ){ UnmapViewOfFile(pWin32File->pMap); *ppOut = pWin32File->pMap = NULL; *pnOut = pWin32File->nMap = 0; } if( pWin32File->hMap!=NULL ){ CloseHandle(pWin32File->hMap); pWin32File->hMap = NULL; } if( iMin>=0 ){ LARGE_INTEGER fileSize; DWORD dwSizeHigh; DWORD dwSizeLow; HANDLE hMap; LPVOID pMap; memset(&fileSize, 0, sizeof(LARGE_INTEGER)); if( !GetFileSizeEx(pWin32File->hFile, &fileSize) ){ return LSM_IOERR_BKPT; } assert( fileSize.QuadPart>=0 ); if( fileSize.QuadPart<iMin ){ int rc; fileSize.QuadPart = ((iMin + nIncrSz-1) / nIncrSz) * nIncrSz; rc = lsmWin32OsTruncate(pFile, fileSize.QuadPart); if( rc!=LSM_OK ){ return rc; } } dwSizeLow = (DWORD)(fileSize.QuadPart & 0xFFFFFFFF); dwSizeHigh = (DWORD)((fileSize.QuadPart & 0x7FFFFFFFFFFFFFFF) >> 32); hMap = CreateFileMappingW(pWin32File->hFile, NULL, PAGE_READWRITE, dwSizeHigh, dwSizeLow, NULL); if( hMap==NULL ){ return LSM_IOERR_BKPT; } pWin32File->hMap = hMap; assert( fileSize.QuadPart<=0xFFFFFFFF ); pMap = MapViewOfFile(hMap, FILE_MAP_WRITE | FILE_MAP_READ, 0, 0, (SIZE_T)fileSize.QuadPart); if( pMap==NULL ){ return LSM_IOERR_BKPT; } pWin32File->pMap = pMap; pWin32File->nMap = (SIZE_T)fileSize.QuadPart; } *ppOut = pWin32File->pMap; *pnOut = pWin32File->nMap; return LSM_OK; } static BOOL win32IsDriveLetterAndColon( const char *zPathname ){ return ( isalpha(zPathname[0]) && zPathname[1]==':' ); } |
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528 529 530 531 532 533 534 | #define MX_CLOSE_ATTEMPT 3 static int lsmWin32OsClose(lsm_file *pFile){ int rc; int nRetry = 0; Win32File *pWin32File = (Win32File *)pFile; lsmWin32OsShmUnmap(pFile, 0); | | | > > > > > > | 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 | #define MX_CLOSE_ATTEMPT 3 static int lsmWin32OsClose(lsm_file *pFile){ int rc; int nRetry = 0; Win32File *pWin32File = (Win32File *)pFile; lsmWin32OsShmUnmap(pFile, 0); if( pWin32File->pMap!=NULL ){ UnmapViewOfFile(pWin32File->pMap); pWin32File->pMap = NULL; pWin32File->nMap = 0; } if( pWin32File->hMap!=NULL ){ CloseHandle(pWin32File->hMap); pWin32File->hMap = NULL; } do{ if( pWin32File->hFile==NULL ){ rc = LSM_IOERR_BKPT; break; } rc = CloseHandle(pWin32File->hFile); if( rc ){ pWin32File->hFile = NULL; rc = LSM_OK; break; } if( ++nRetry>=MX_CLOSE_ATTEMPT ){ rc = LSM_IOERR_BKPT; break; } |
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