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Overview
Comment: | First attempt at a sharding VFS to split large DBs. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | experimental |
Files: | files | file ages | folders |
SHA1: |
dd4dc8a4269e23ffe0e18438690da607 |
User & Date: | shaneh 2010-11-04 20:50:27.000 |
Context
2010-11-04
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21:03 | Fix the main.mk makefile to include test_multiplex.c for testfixture. (check-in: c27c51180e user: drh tags: experimental) | |
20:50 | First attempt at a sharding VFS to split large DBs. (check-in: dd4dc8a426 user: shaneh tags: experimental) | |
20:47 | Fix icon size so it's really 32x32. (check-in: 62c494f694 user: shaneh tags: experimental) | |
Changes
Changes to src/tclsqlite.c.
︙ | ︙ | |||
3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 | extern int SqlitetestOsinst_Init(Tcl_Interp*); extern int Sqlitetestbackup_Init(Tcl_Interp*); extern int Sqlitetestintarray_Init(Tcl_Interp*); extern int Sqlitetestvfs_Init(Tcl_Interp *); extern int SqlitetestStat_Init(Tcl_Interp*); extern int Sqlitetestrtree_Init(Tcl_Interp*); extern int Sqlitequota_Init(Tcl_Interp*); Sqliteconfig_Init(interp); Sqlitetest1_Init(interp); Sqlitetest2_Init(interp); Sqlitetest3_Init(interp); Sqlitetest4_Init(interp); Sqlitetest5_Init(interp); | > | 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 | extern int SqlitetestOsinst_Init(Tcl_Interp*); extern int Sqlitetestbackup_Init(Tcl_Interp*); extern int Sqlitetestintarray_Init(Tcl_Interp*); extern int Sqlitetestvfs_Init(Tcl_Interp *); extern int SqlitetestStat_Init(Tcl_Interp*); extern int Sqlitetestrtree_Init(Tcl_Interp*); extern int Sqlitequota_Init(Tcl_Interp*); extern int Sqlitemultiplex_Init(Tcl_Interp*); Sqliteconfig_Init(interp); Sqlitetest1_Init(interp); Sqlitetest2_Init(interp); Sqlitetest3_Init(interp); Sqlitetest4_Init(interp); Sqlitetest5_Init(interp); |
︙ | ︙ | |||
3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 | SqlitetestOsinst_Init(interp); Sqlitetestbackup_Init(interp); Sqlitetestintarray_Init(interp); Sqlitetestvfs_Init(interp); SqlitetestStat_Init(interp); Sqlitetestrtree_Init(interp); Sqlitequota_Init(interp); Tcl_CreateObjCommand(interp,"load_testfixture_extensions",init_all_cmd,0,0); #ifdef SQLITE_SSE Sqlitetestsse_Init(interp); #endif } | > | 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 | SqlitetestOsinst_Init(interp); Sqlitetestbackup_Init(interp); Sqlitetestintarray_Init(interp); Sqlitetestvfs_Init(interp); SqlitetestStat_Init(interp); Sqlitetestrtree_Init(interp); Sqlitequota_Init(interp); Sqlitemultiplex_Init(interp); Tcl_CreateObjCommand(interp,"load_testfixture_extensions",init_all_cmd,0,0); #ifdef SQLITE_SSE Sqlitetestsse_Init(interp); #endif } |
︙ | ︙ |
Added src/test_multiplex.c.
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In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** ** This file contains a VFS "shim" - a layer that sits in between the ** pager and the real VFS. ** ** This particular shim enforces a multiplex system on DB files. ** This shim shards/partitions a single DB file into smaller ** "chunks" such that the total DB file size may exceed the maximum ** file size of the underlying file system. ** */ #include "sqlite3.h" #include <string.h> #include <assert.h> #include "sqliteInt.h" /************************ Shim Definitions ******************************/ #define SQLITE_MULTIPLEX_CHUNK_SIZE 0x80000000 #define SQLITE_MULTIPLEX_MAX_CHUNKS 32 /************************ Object Definitions ******************************/ /* Forward declaration of all object types */ typedef struct multiplexGroup multiplexGroup; typedef struct multiplexConn multiplexConn; /* ** A "multiplex group" is a collection of files that collectively ** makeup a single SQLite DB file. This allows the size of the DB ** to exceed the limits imposed by the file system. ** ** There is an instance of the following object for each defined multiplex ** group. */ struct multiplexGroup { sqlite3_file *pReal[SQLITE_MULTIPLEX_MAX_CHUNKS]; /* Handles to each chunk */ char bOpen[SQLITE_MULTIPLEX_MAX_CHUNKS]; /* 0 if chunk not opened */ char *zName; /* Base filename of this group */ int nName; /* Length of base filename */ int flags; /* Flags used for original opening */ multiplexGroup *pNext, *pPrev; /* Doubly linked list of all group objects */ }; /* ** An instance of the following object represents each open connection ** to a file that is multiplex'ed. This object is a ** subclass of sqlite3_file. The sqlite3_file object for the underlying ** VFS is appended to this structure. */ struct multiplexConn { sqlite3_file base; /* Base class - must be first */ multiplexGroup *pGroup; /* The underlying group of files */ }; /************************* Global Variables **********************************/ /* ** All global variables used by this file are containing within the following ** gMultiplex structure. */ static struct { /* The pOrigVfs is the real, original underlying VFS implementation. ** Most operations pass-through to the real VFS. This value is read-only ** during operation. It is only modified at start-time and thus does not ** require a mutex. */ sqlite3_vfs *pOrigVfs; /* The sThisVfs is the VFS structure used by this shim. It is initialized ** at start-time and thus does not require a mutex */ sqlite3_vfs sThisVfs; /* The sIoMethods defines the methods used by sqlite3_file objects ** associated with this shim. It is initialized at start-time and does ** not require a mutex. ** ** When the underlying VFS is called to open a file, it might return ** either a version 1 or a version 2 sqlite3_file object. This shim ** has to create a wrapper sqlite3_file of the same version. Hence ** there are two I/O method structures, one for version 1 and the other ** for version 2. */ sqlite3_io_methods sIoMethodsV1; sqlite3_io_methods sIoMethodsV2; /* True when this shim as been initialized. */ int isInitialized; /* For run-time access any of the other global data structures in this ** shim, the following mutex must be held. */ sqlite3_mutex *pMutex; /* List of multiplexGroup objects. */ multiplexGroup *pGroups; /* Chunk params */ int nChunkSize; int nMaxChunks; } gMultiplex; /************************* Utility Routines *********************************/ /* ** Acquire and release the mutex used to serialize access to the ** list of multiplexGroups. */ static void multiplexEnter(void){ sqlite3_mutex_enter(gMultiplex.pMutex); } static void multiplexLeave(void){ sqlite3_mutex_leave(gMultiplex.pMutex); } /* Translate an sqlite3_file* that is really a multiplexGroup* into ** the sqlite3_file* for the underlying original VFS. */ static sqlite3_file *multiplexSubOpen(multiplexConn *pConn, int iChunk, int *rc, int *pOutFlags){ multiplexGroup *pGroup = pConn->pGroup; sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */ if( iChunk<gMultiplex.nMaxChunks ){ sqlite3_file *pSubOpen = pGroup->pReal[iChunk]; /* Real file descriptor */ if( !pGroup->bOpen[iChunk] ){ pGroup->zName[pGroup->nName] = '\0'; if( iChunk ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", iChunk); *rc = pOrigVfs->xOpen(pOrigVfs, pGroup->zName, pSubOpen, pGroup->flags, pOutFlags); if( *rc==SQLITE_OK ){ pGroup->bOpen[iChunk] = -1; return pSubOpen; } return NULL; } *rc = SQLITE_OK; return pSubOpen; } *rc = SQLITE_ERROR; return NULL; } /************************* VFS Method Wrappers *****************************/ /* ** This is the xOpen method used for the "multiplex" VFS. ** ** Most of the work is done by the underlying original VFS. This method ** simply links the new file into the appropriate multiplex group if it is a ** file that needs to be tracked. */ static int multiplexOpen( sqlite3_vfs *pVfs, /* The multiplex VFS */ const char *zName, /* Name of file to be opened */ sqlite3_file *pConn, /* Fill in this file descriptor */ int flags, /* Flags to control the opening */ int *pOutFlags /* Flags showing results of opening */ ){ int rc; /* Result code */ multiplexConn *pMultiplexOpen; /* The new multiplex file descriptor */ multiplexGroup *pGroup; /* Corresponding multiplexGroup object */ sqlite3_file *pSubOpen; /* Real file descriptor */ sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */ int nName = sqlite3Strlen30(zName); int i; UNUSED_PARAMETER(pVfs); /* If the file is not a main database file or a WAL, then use the ** normal xOpen method. */ if( (flags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_WAL|SQLITE_OPEN_MAIN_JOURNAL))==0 ){ return pOrigVfs->xOpen(pOrigVfs, zName, pConn, flags, pOutFlags); } /* We need to create a group structure and manage ** access to this group of files. */ multiplexEnter(); pMultiplexOpen = (multiplexConn*)pConn; /* -0000\0 */ pGroup = sqlite3_malloc( sizeof(multiplexGroup) + (pOrigVfs->szOsFile*gMultiplex.nMaxChunks) + nName + 6 ); if( pGroup==0 ){ rc=SQLITE_NOMEM; }else{ pMultiplexOpen->pGroup = pGroup; memset(pGroup, 0, sizeof(multiplexGroup) + (pOrigVfs->szOsFile*gMultiplex.nMaxChunks) + nName + 6); for(i=0; i<gMultiplex.nMaxChunks; i++){ pGroup->pReal[i] = (sqlite3_file *)((char *)&pGroup[1] + (pOrigVfs->szOsFile*i)); } pGroup->zName = (char *)&pGroup[1] + (pOrigVfs->szOsFile*gMultiplex.nMaxChunks); memcpy(pGroup->zName, zName, nName+1); pGroup->nName = nName; pGroup->flags = flags; pSubOpen = multiplexSubOpen(pMultiplexOpen, 0, &rc, pOutFlags); if( pSubOpen ){ if( pSubOpen->pMethods->iVersion==1 ){ pMultiplexOpen->base.pMethods = &gMultiplex.sIoMethodsV1; }else{ pMultiplexOpen->base.pMethods = &gMultiplex.sIoMethodsV2; } /* place this group at the head of our list */ pGroup->pNext = gMultiplex.pGroups; if( gMultiplex.pGroups ) gMultiplex.pGroups->pPrev = pGroup; gMultiplex.pGroups = pGroup; }else{ sqlite3_free(pGroup); } } multiplexLeave(); return rc; } /************************ I/O Method Wrappers *******************************/ /* xClose requests get passed through to the original VFS. ** We loop over all open chunk handles and close them. ** The group structure for this file is unlinked from ** our list of groups and freed. */ static int multiplexClose(sqlite3_file *pConn){ multiplexConn *p = (multiplexConn*)pConn; multiplexGroup *pGroup = p->pGroup; int rc = SQLITE_OK; int i; multiplexEnter(); for(i=0; i<gMultiplex.nMaxChunks; i++){ if( pGroup->bOpen[i] ){ sqlite3_file *pSubOpen = pGroup->pReal[i]; int rc2 = pSubOpen->pMethods->xClose(pSubOpen); if( rc2!=SQLITE_OK ) rc = rc2; pGroup->bOpen[i] = 0; } } if( pGroup->pNext ) pGroup->pNext->pPrev = pGroup->pPrev; if( pGroup->pPrev ){ pGroup->pPrev->pNext = pGroup->pNext; }else{ gMultiplex.pGroups = pGroup->pNext; } sqlite3_free(pGroup); multiplexLeave(); return rc; } /* Pass xRead requests thru to the original VFS after ** determining the correct chunk to operate on. */ static int multiplexRead( sqlite3_file *pConn, void *pBuf, int iAmt, sqlite3_int64 iOfst ){ multiplexConn *p = (multiplexConn*)pConn; int rc = SQLITE_OK; multiplexEnter(); while( iAmt > 0 ){ int i = (int)(iOfst/gMultiplex.nChunkSize); sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL); if( pSubOpen ){ int extra = ((int)(iOfst % gMultiplex.nChunkSize) + iAmt) - gMultiplex.nChunkSize; if( extra<0 ) extra = 0; iAmt -= extra; rc = pSubOpen->pMethods->xRead(pSubOpen, pBuf, iAmt, iOfst%gMultiplex.nChunkSize); if( rc!=SQLITE_OK ) break; pBuf = (char *)pBuf + iAmt; iOfst += iAmt; iAmt = extra; }else{ rc = SQLITE_IOERR_READ; break; } } multiplexLeave(); return rc; } /* Pass xWrite requests thru to the original VFS after ** determining the correct chunk to operate on. */ static int multiplexWrite( sqlite3_file *pConn, const void *pBuf, int iAmt, sqlite3_int64 iOfst ){ multiplexConn *p = (multiplexConn*)pConn; int rc = SQLITE_OK; multiplexEnter(); while( iAmt > 0 ){ int i = (int)(iOfst/gMultiplex.nChunkSize); sqlite3_file *pSubOpen = multiplexSubOpen(p, i, &rc, NULL); if( pSubOpen ){ int extra = ((int)(iOfst % gMultiplex.nChunkSize) + iAmt) - gMultiplex.nChunkSize; if( extra<0 ) extra = 0; iAmt -= extra; rc = pSubOpen->pMethods->xWrite(pSubOpen, pBuf, iAmt, iOfst%gMultiplex.nChunkSize); if( rc!=SQLITE_OK ) break; pBuf = (char *)pBuf + iAmt; iOfst += iAmt; iAmt = extra; }else{ rc = SQLITE_IOERR_WRITE; break; } } multiplexLeave(); return rc; } /* Pass xTruncate requests thru to the original VFS after ** determining the correct chunk to operate on. Delete any ** chunks above the truncate mark. */ static int multiplexTruncate(sqlite3_file *pConn, sqlite3_int64 size){ multiplexConn *p = (multiplexConn*)pConn; multiplexGroup *pGroup = p->pGroup; int rc = SQLITE_OK; int rc2; int i; sqlite3_file *pSubOpen; sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */ multiplexEnter(); /* delete the chunks above the truncate limit */ for(i=(int)(size/gMultiplex.nChunkSize)+1; i<gMultiplex.nMaxChunks; i++){ if( pGroup->bOpen[i] ){ pSubOpen = pGroup->pReal[i]; rc2 = pSubOpen->pMethods->xClose(pSubOpen); if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE; } pGroup->zName[pGroup->nName] = '\0'; if( i ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", i); rc2 = pOrigVfs->xDelete(pOrigVfs, pGroup->zName, 0); if( rc2!=SQLITE_OK ) rc = SQLITE_IOERR_TRUNCATE; } pSubOpen = multiplexSubOpen(p, (int)(size/gMultiplex.nChunkSize), &rc2, NULL); if( pSubOpen ){ rc2 = pSubOpen->pMethods->xTruncate(pSubOpen, size%gMultiplex.nChunkSize); if( rc2!=SQLITE_OK ) rc = rc2; }else{ rc = SQLITE_IOERR_TRUNCATE; } multiplexLeave(); return rc; } /* Pass xSync requests through to the original VFS without change */ static int multiplexSync(sqlite3_file *pConn, int flags){ multiplexConn *p = (multiplexConn*)pConn; multiplexGroup *pGroup = p->pGroup; int rc = SQLITE_OK; int i; multiplexEnter(); for(i=0; i<gMultiplex.nMaxChunks; i++){ /* if we don't have it open, we don't need to sync it */ if( pGroup->bOpen[i] ){ sqlite3_file *pSubOpen = pGroup->pReal[i]; int rc2 = pSubOpen->pMethods->xSync(pSubOpen, flags); if( rc2!=SQLITE_OK ) rc = rc2; } } multiplexLeave(); return rc; } /* Pass xFileSize requests through to the original VFS. ** Aggregate the size of all the chunks before returning. */ static int multiplexFileSize(sqlite3_file *pConn, sqlite3_int64 *pSize){ multiplexConn *p = (multiplexConn*)pConn; multiplexGroup *pGroup = p->pGroup; int rc = SQLITE_OK; int rc2; int i; multiplexEnter(); *pSize = 0; for(i=0; i<gMultiplex.nMaxChunks; i++){ sqlite3_file *pSubOpen = NULL; sqlite3_int64 sz; /* if not opened already, check to see if the chunk exists */ if( pGroup->bOpen[i] ){ pSubOpen = pGroup->pReal[i]; }else{ sqlite3_vfs *pOrigVfs = gMultiplex.pOrigVfs; /* Real VFS */ int exists = 0; pGroup->zName[pGroup->nName] = '\0'; if( i ) sqlite3_snprintf(pGroup->nName+6, pGroup->zName+pGroup->nName, "-%04d", i); rc2 = pOrigVfs->xAccess(pOrigVfs, pGroup->zName, SQLITE_ACCESS_EXISTS, &exists); if( rc2==SQLITE_OK && exists){ /* if it exists, open it */ pSubOpen = multiplexSubOpen(p, i, &rc, NULL); }else{ /* stop at first "gap" */ break; } } if( pSubOpen ){ rc2 = pSubOpen->pMethods->xFileSize(pSubOpen, &sz); if( rc2!=SQLITE_OK ){ rc = rc2; }else{ *pSize += sz; } }else{ break; } } multiplexLeave(); return rc; } /* Pass xLock requests through to the original VFS unchanged. */ static int multiplexLock(sqlite3_file *pConn, int lock){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xLock(pSubOpen, lock); } return SQLITE_BUSY; } /* Pass xUnlock requests through to the original VFS unchanged. */ static int multiplexUnlock(sqlite3_file *pConn, int lock){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xUnlock(pSubOpen, lock); } return SQLITE_IOERR_UNLOCK; } /* Pass xCheckReservedLock requests through to the original VFS unchanged. */ static int multiplexCheckReservedLock(sqlite3_file *pConn, int *pResOut){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xCheckReservedLock(pSubOpen, pResOut); } return SQLITE_IOERR_CHECKRESERVEDLOCK; } /* Pass xFileControl requests through to the original VFS unchanged. */ static int multiplexFileControl(sqlite3_file *pConn, int op, void *pArg){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen; if ( op==SQLITE_FCNTL_SIZE_HINT || op==SQLITE_FCNTL_CHUNK_SIZE ) return SQLITE_OK; pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xFileControl(pSubOpen, op, pArg); } return SQLITE_ERROR; } /* Pass xSectorSize requests through to the original VFS unchanged. */ static int multiplexSectorSize(sqlite3_file *pConn){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xSectorSize(pSubOpen); } return SQLITE_DEFAULT_SECTOR_SIZE; } /* Pass xDeviceCharacteristics requests through to the original VFS unchanged. */ static int multiplexDeviceCharacteristics(sqlite3_file *pConn){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xDeviceCharacteristics(pSubOpen); } return 0; } /* Pass xShmMap requests through to the original VFS unchanged. */ static int multiplexShmMap( sqlite3_file *pConn, /* Handle open on database file */ int iRegion, /* Region to retrieve */ int szRegion, /* Size of regions */ int bExtend, /* True to extend file if necessary */ void volatile **pp /* OUT: Mapped memory */ ){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xShmMap(pSubOpen, iRegion, szRegion, bExtend, pp); } return SQLITE_IOERR; } /* Pass xShmLock requests through to the original VFS unchanged. */ static int multiplexShmLock( sqlite3_file *pConn, /* Database file holding the shared memory */ int ofst, /* First lock to acquire or release */ int n, /* Number of locks to acquire or release */ int flags /* What to do with the lock */ ){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xShmLock(pSubOpen, ofst, n, flags); } return SQLITE_BUSY; } /* Pass xShmBarrier requests through to the original VFS unchanged. */ static void multiplexShmBarrier(sqlite3_file *pConn){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ pSubOpen->pMethods->xShmBarrier(pSubOpen); } } /* Pass xShmUnmap requests through to the original VFS unchanged. */ static int multiplexShmUnmap(sqlite3_file *pConn, int deleteFlag){ multiplexConn *p = (multiplexConn*)pConn; int rc; sqlite3_file *pSubOpen = multiplexSubOpen(p, 0, &rc, NULL); if( pSubOpen ){ return pSubOpen->pMethods->xShmUnmap(pSubOpen, deleteFlag); } return SQLITE_OK; } /************************** Public Interfaces *****************************/ /* ** Initialize the multiplex VFS shim. Use the VFS named zOrigVfsName ** as the VFS that does the actual work. Use the default if ** zOrigVfsName==NULL. ** ** The multiplex VFS shim is named "multiplex". It will become the default ** VFS if makeDefault is non-zero. ** ** THIS ROUTINE IS NOT THREADSAFE. Call this routine exactly once ** during start-up. */ int sqlite3_multiplex_initialize(const char *zOrigVfsName, int makeDefault){ sqlite3_vfs *pOrigVfs; if( gMultiplex.isInitialized ) return SQLITE_MISUSE; pOrigVfs = sqlite3_vfs_find(zOrigVfsName); if( pOrigVfs==0 ) return SQLITE_ERROR; assert( pOrigVfs!=&gMultiplex.sThisVfs ); gMultiplex.pMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST); if( !gMultiplex.pMutex ){ return SQLITE_NOMEM; } gMultiplex.nChunkSize = SQLITE_MULTIPLEX_CHUNK_SIZE; gMultiplex.nMaxChunks = SQLITE_MULTIPLEX_MAX_CHUNKS; gMultiplex.pGroups = NULL; gMultiplex.isInitialized = 1; gMultiplex.pOrigVfs = pOrigVfs; gMultiplex.sThisVfs = *pOrigVfs; gMultiplex.sThisVfs.szOsFile += sizeof(multiplexConn); gMultiplex.sThisVfs.zName = "multiplex"; gMultiplex.sThisVfs.xOpen = multiplexOpen; gMultiplex.sIoMethodsV1.iVersion = 1; gMultiplex.sIoMethodsV1.xClose = multiplexClose; gMultiplex.sIoMethodsV1.xRead = multiplexRead; gMultiplex.sIoMethodsV1.xWrite = multiplexWrite; gMultiplex.sIoMethodsV1.xTruncate = multiplexTruncate; gMultiplex.sIoMethodsV1.xSync = multiplexSync; gMultiplex.sIoMethodsV1.xFileSize = multiplexFileSize; gMultiplex.sIoMethodsV1.xLock = multiplexLock; gMultiplex.sIoMethodsV1.xUnlock = multiplexUnlock; gMultiplex.sIoMethodsV1.xCheckReservedLock = multiplexCheckReservedLock; gMultiplex.sIoMethodsV1.xFileControl = multiplexFileControl; gMultiplex.sIoMethodsV1.xSectorSize = multiplexSectorSize; gMultiplex.sIoMethodsV1.xDeviceCharacteristics = multiplexDeviceCharacteristics; gMultiplex.sIoMethodsV2 = gMultiplex.sIoMethodsV1; gMultiplex.sIoMethodsV2.iVersion = 2; gMultiplex.sIoMethodsV2.xShmMap = multiplexShmMap; gMultiplex.sIoMethodsV2.xShmLock = multiplexShmLock; gMultiplex.sIoMethodsV2.xShmBarrier = multiplexShmBarrier; gMultiplex.sIoMethodsV2.xShmUnmap = multiplexShmUnmap; sqlite3_vfs_register(&gMultiplex.sThisVfs, makeDefault); return SQLITE_OK; } /* ** Shutdown the multiplex system. ** ** All SQLite database connections must be closed before calling this ** routine. ** ** THIS ROUTINE IS NOT THREADSAFE. Call this routine exactly once while ** shutting down in order to free all remaining multiplex groups. */ int sqlite3_multiplex_shutdown(void){ if( gMultiplex.isInitialized==0 ) return SQLITE_MISUSE; if( gMultiplex.pGroups ) return SQLITE_MISUSE; gMultiplex.isInitialized = 0; sqlite3_mutex_free(gMultiplex.pMutex); sqlite3_vfs_unregister(&gMultiplex.sThisVfs); memset(&gMultiplex, 0, sizeof(gMultiplex)); return SQLITE_OK; } /* ** Adjust chunking params. VFS should be initialized first. ** No files should be open. Re-intializing will reset these ** to the default. */ int sqlite3_multiplex_set( int nChunkSize, /* Max chunk size */ int nMaxChunks /* Max number of chunks */ ){ if( !gMultiplex.isInitialized ) return SQLITE_MISUSE; if( gMultiplex.pGroups ) return SQLITE_MISUSE; if( nMaxChunks>SQLITE_MULTIPLEX_MAX_CHUNKS ) return SQLITE_MISUSE; multiplexEnter(); gMultiplex.nChunkSize = nChunkSize; gMultiplex.nMaxChunks = nMaxChunks; multiplexLeave(); return SQLITE_OK; } /***************************** Test Code ***********************************/ #ifdef SQLITE_TEST #include <tcl.h> extern const char *sqlite3TestErrorName(int); /* ** tclcmd: sqlite3_multiplex_initialize NAME MAKEDEFAULT */ static int test_multiplex_initialize( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ const char *zName; /* Name of new multiplex VFS */ int makeDefault; /* True to make the new VFS the default */ int rc; /* Value returned by multiplex_initialize() */ UNUSED_PARAMETER(clientData); /* Process arguments */ if( objc!=3 ){ Tcl_WrongNumArgs(interp, 1, objv, "NAME MAKEDEFAULT"); return TCL_ERROR; } zName = Tcl_GetString(objv[1]); if( Tcl_GetBooleanFromObj(interp, objv[2], &makeDefault) ) return TCL_ERROR; if( zName[0]=='\0' ) zName = 0; /* Call sqlite3_multiplex_initialize() */ rc = sqlite3_multiplex_initialize(zName, makeDefault); Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC); return TCL_OK; } /* ** tclcmd: sqlite3_multiplex_shutdown */ static int test_multiplex_shutdown( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ int rc; /* Value returned by multiplex_shutdown() */ UNUSED_PARAMETER(clientData); if( objc!=1 ){ Tcl_WrongNumArgs(interp, 1, objv, ""); return TCL_ERROR; } /* Call sqlite3_multiplex_shutdown() */ rc = sqlite3_multiplex_shutdown(); Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC); return TCL_OK; } /* ** tclcmd: sqlite3_multiplex_set CHUNK_SIZE MAX_CHUNKS */ static int test_multiplex_set( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ int nChunkSize; /* Max chunk size */ int nMaxChunks; /* Max number of chunks */ int rc; /* Value returned by sqlite3_multiplex_set() */ UNUSED_PARAMETER(clientData); /* Process arguments */ if( objc!=3 ){ Tcl_WrongNumArgs(interp, 1, objv, "CHUNK_SIZE MAX_CHUNKS"); return TCL_ERROR; } if( Tcl_GetIntFromObj(interp, objv[1], &nChunkSize) ) return TCL_ERROR; if( Tcl_GetIntFromObj(interp, objv[2], &nMaxChunks) ) return TCL_ERROR; if( nMaxChunks>SQLITE_MULTIPLEX_MAX_CHUNKS ){ Tcl_WrongNumArgs(interp, 1, objv, "MAX_CHUNKS > SQLITE_MULTIPLEX_MAX_CHUNKS"); return TCL_ERROR; } /* Invoke sqlite3_multiplex_set() */ rc = sqlite3_multiplex_set(nChunkSize, nMaxChunks); Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC); return TCL_OK; } /* ** tclcmd: sqlite3_multiplex_dump */ static int test_multiplex_dump( void * clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ Tcl_Obj *pResult; Tcl_Obj *pGroupTerm; multiplexGroup *pGroup; int i; int nChunks = 0; UNUSED_PARAMETER(clientData); UNUSED_PARAMETER(objc); UNUSED_PARAMETER(objv); pResult = Tcl_NewObj(); multiplexEnter(); for(pGroup=gMultiplex.pGroups; pGroup; pGroup=pGroup->pNext){ pGroupTerm = Tcl_NewObj(); pGroup->zName[pGroup->nName] = '\0'; Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewStringObj(pGroup->zName, -1)); Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewIntObj(pGroup->nName)); Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewIntObj(pGroup->flags)); /* count number of chunks with open handles */ for(i=0; i<gMultiplex.nMaxChunks; i++){ if( pGroup->bOpen[i] ) nChunks++; } Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewIntObj(nChunks)); Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewIntObj(gMultiplex.nChunkSize)); Tcl_ListObjAppendElement(interp, pGroupTerm, Tcl_NewIntObj(gMultiplex.nMaxChunks)); Tcl_ListObjAppendElement(interp, pResult, pGroupTerm); } multiplexLeave(); Tcl_SetObjResult(interp, pResult); return TCL_OK; } /* ** This routine registers the custom TCL commands defined in this ** module. This should be the only procedure visible from outside ** of this module. */ int Sqlitemultiplex_Init(Tcl_Interp *interp){ static struct { char *zName; Tcl_ObjCmdProc *xProc; } aCmd[] = { { "sqlite3_multiplex_initialize", test_multiplex_initialize }, { "sqlite3_multiplex_shutdown", test_multiplex_shutdown }, { "sqlite3_multiplex_set", test_multiplex_set }, { "sqlite3_multiplex_dump", test_multiplex_dump }, }; int i; for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){ Tcl_CreateObjCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0); } return TCL_OK; } #endif |
Added test/multiplex.test.
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 | # 2010 October 29 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # set testdir [file dirname $argv0] source $testdir/tester.tcl source $testdir/malloc_common.tcl proc multiplex_delete {name} { file delete -force $name file delete -force $name-journal file delete -force $name-wal for {set i 1} {$i<=15} {incr i} { file delete -force $name-000$i file delete -force $name-00$i } } db close do_test multiplex-1.1 { sqlite3_multiplex_initialize nosuchvfs 1 } {SQLITE_ERROR} do_test multiplex-1.2 { sqlite3_multiplex_initialize "" 1 } {SQLITE_OK} do_test multiplex-1.3 { sqlite3_multiplex_initialize "" 1 } {SQLITE_MISUSE} do_test multiplex-1.4 { sqlite3_multiplex_shutdown } {SQLITE_OK} do_test multiplex-1.5 { sqlite3_multiplex_initialize "" 0 } {SQLITE_OK} do_test multiplex-1.6 { sqlite3_multiplex_shutdown } {SQLITE_OK} do_test multiplex-1.7 { sqlite3_multiplex_initialize "" 1 } {SQLITE_OK} do_test multiplex-1.8 { sqlite3_multiplex_shutdown } {SQLITE_OK} #------------------------------------------------------------------------- # Some simple warm-body tests with a single database file in rollback # mode: # # multiplex-2.1.*: Test simple writing to a multiplex file. # # multiplex-2.2.*: More writing. # # multiplex-2.3.*: Open and close a second db. # # multiplex-2.4.*: Try to shutdown the multiplex system before closing the db # file. Check that this fails and the multiplex system still works # afterwards. Then close the database and successfully shut # down the multiplex system. # sqlite3_multiplex_initialize "" 1 sqlite3_multiplex_set 0x8000 16 do_test multiplex-2.1.2 { sqlite3 db test.db execsql { PRAGMA page_size=1024; PRAGMA auto_vacuum=OFF; PRAGMA journal_mode=DELETE; } execsql { CREATE TABLE t1(a, b); INSERT INTO t1 VALUES(1, randomblob(1100)); INSERT INTO t1 VALUES(2, randomblob(1100)); } } {} do_test multiplex-2.1.3 { file size test.db } {4096} do_test multiplex-2.1.4 { execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) } } {} do_test multiplex-2.2.1 { execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) } } {} do_test multiplex-2.2.3 { file size test.db } {6144} do_test multiplex-2.3.1 { sqlite3 db2 bak.db db2 close } {} do_test multiplex-2.4.1 { sqlite3_multiplex_shutdown } {SQLITE_MISUSE} do_test multiplex-2.4.2 { execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) } } {} do_test multiplex-2.4.4 { file size test.db } {7168} do_test multiplex-2.4.99 { db close sqlite3_multiplex_shutdown } {SQLITE_OK} #------------------------------------------------------------------------- # Try some tests with more than one connection to a database file. Still # in rollback mode. # # multiplex-3.1.*: Two connections to a single database file. # # multiplex-3.2.*: Two connections to each of several database files (that # are in the same multiplex group). # do_test multiplex-3.1.1 { multiplex_delete test.db sqlite3_multiplex_initialize "" 1 sqlite3_multiplex_set 0x8000 16 } {SQLITE_OK} do_test multiplex-3.1.2 { sqlite3 db test.db execsql { PRAGMA page_size = 1024; PRAGMA journal_mode = delete; PRAGMA auto_vacuum = off; CREATE TABLE t1(a PRIMARY KEY, b); INSERT INTO t1 VALUES(1, 'one'); } file size test.db } {3072} do_test multiplex-3.1.3 { sqlite3 db2 test.db execsql { CREATE TABLE t2(a, b) } db2 } {} do_test multiplex-3.1.4 { execsql { CREATE TABLE t3(a, b) } } {} do_test multiplex-3.1.5 { catchsql { CREATE TABLE t3(a, b) } } {1 {table t3 already exists}} do_test multiplex-3.1.6 { db close db2 close } {} do_test multiplex-3.2.1a { multiplex_delete test.db multiplex_delete test2.db sqlite3 db1a test.db sqlite3 db2a test2.db foreach db {db1a db2a} { execsql { PRAGMA page_size = 1024; PRAGMA journal_mode = delete; PRAGMA auto_vacuum = off; CREATE TABLE t1(a, b); } $db } list [file size test.db] [file size test2.db] } {2048 2048} do_test multiplex-3.2.1b { sqlite3 db1b test.db sqlite3 db2b test2.db } {} do_test multiplex-3.2.2 { execsql { INSERT INTO t1 VALUES('x', 'y') } db1a } {} do_test multiplex-3.2.3 { execsql { INSERT INTO t1 VALUES('v', 'w') } db1b } {} do_test multiplex-3.2.4 { execsql { INSERT INTO t1 VALUES('t', 'u') } db2a } {} do_test multiplex-3.2.5 { execsql { INSERT INTO t1 VALUES('r', 's') } db2b } {} do_test multiplex-3.2.6 { execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db1a } {} do_test multiplex-3.2.7 { execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db1b } {} do_test multiplex-3.2.8 { execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db2a } {} do_test multiplex-3.2.9 { execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db2b } {} do_test multiplex-3.3.1 { execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db1a execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db1b execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db2a execsql { INSERT INTO t1 VALUES(randomblob(500), randomblob(500)) } db2b } {} do_test multiplex-3.2.X { foreach db {db1a db2a db2b db1b} { catch { $db close } } } {} #------------------------------------------------------------------------- # sqlite3_multiplex_initialize "" 1 sqlite3_multiplex_set 0x8000 16 # Return a list of all currently defined multiplexs. proc multiplex_list {} { set allq {} foreach q [sqlite3_multiplex_dump] { lappend allq [lindex $q 0] } return [lsort $allq] } do_test multiplex-4.1.6 { multiplex_delete test2.db sqlite3 db test2.db db eval {CREATE TABLE t2(x); INSERT INTO t2 VALUES('tab-t2');} set res [multiplex_list] list [regexp {test2.db} $res] } {1} do_test multiplex-4.1.6a { sqlite3 db2 test2.db db2 eval {SELECT * FROM t2} } {tab-t2} do_test multiplex-4.1.7 { execsql {INSERT INTO t2 VALUES(zeroblob(200000))} } {} do_test multiplex-4.1.8 { sqlite3 db2 test2.db db2 eval {SELECT count(*) FROM t2} } {2} do_test multiplex-4.1.8a { db2 eval { DELETE FROM t2 WHERE x = 'tab-t2' } } {} do_test multiplex-4.1.8b { sqlite3 db2 test2.db db2 eval {SELECT count(*) FROM t2} } {1} do_test multiplex-4.1.9 { execsql {INSERT INTO t2 VALUES(zeroblob(200000))} } {} do_test multiplex-4.1.10 { set res [multiplex_list] list [regexp {test2.db} $res] } {1} do_test multiplex-4.1.11 { db2 close set res [multiplex_list] list [regexp {test2.db} $res] } {1} do_test multiplex-4.1.12 { db close multiplex_list } {} #------------------------------------------------------------------------- # The following tests test that the multiplex VFS handles malloc and IO # errors. # sqlite3_multiplex_initialize "" 1 sqlite3_multiplex_set 0x8000 16 do_faultsim_test multiplex-5.1 -prep { catch {db close} } -body { sqlite3 db test2.db } do_faultsim_test multiplex-5.2 -prep { catch {db close} } -body { sqlite3 db test.db } catch { db close } multiplex_delete test.db do_test multiplex-5.3.prep { sqlite3 db test.db execsql { PRAGMA auto_vacuum = 1; PRAGMA page_size = 1024; CREATE TABLE t1(a, b); INSERT INTO t1 VALUES(10, zeroblob(1200)); } faultsim_save_and_close } {} do_faultsim_test multiplex-5.3 -prep { faultsim_restore_and_reopen } -body { execsql { DELETE FROM t1 } } do_test multiplex-5.4.1 { catch { db close } multiplex_delete test.db file mkdir test.db list [catch { sqlite3 db test.db } msg] $msg } {1 {unable to open database file}} do_faultsim_test multiplex-5.5 -prep { catch { sqlite3_multiplex_shutdown } } -body { sqlite3_multiplex_initialize "" 1 sqlite3_multiplex_set 0x8000 16 } catch { sqlite3_multiplex_shutdown } finish_test |