diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/journal.c | 2 | ||||
| -rw-r--r-- | src/memjournal.c | 362 | ||||
| -rw-r--r-- | src/os.c | 2 | ||||
| -rw-r--r-- | src/pager.c | 39 | ||||
| -rw-r--r-- | src/sqliteInt.h | 11 |
5 files changed, 284 insertions, 132 deletions
diff --git a/src/journal.c b/src/journal.c index a5cf8c8e2..da59db0e5 100644 --- a/src/journal.c +++ b/src/journal.c @@ -24,6 +24,7 @@ ** buffer, or ** 2) The sqlite3JournalCreate() function is called. */ +#if 0 #ifdef SQLITE_ENABLE_ATOMIC_WRITE #include "sqliteInt.h" @@ -254,3 +255,4 @@ int sqlite3JournalSize(sqlite3_vfs *pVfs){ return (pVfs->szOsFile+sizeof(JournalFile)); } #endif +#endif diff --git a/src/memjournal.c b/src/memjournal.c index 62594530e..9ecd2a9ba 100644 --- a/src/memjournal.c +++ b/src/memjournal.c @@ -21,25 +21,29 @@ typedef struct MemJournal MemJournal; typedef struct FilePoint FilePoint; typedef struct FileChunk FileChunk; -/* Space to hold the rollback journal is allocated in increments of -** this many bytes. -** -** The size chosen is a little less than a power of two. That way, -** the FileChunk object will have a size that almost exactly fills -** a power-of-two allocation. This minimizes wasted space in power-of-two -** memory allocators. -*/ -#define JOURNAL_CHUNKSIZE ((int)(1024-sizeof(FileChunk*))) - /* ** The rollback journal is composed of a linked list of these structures. +** +** The zChunk array is always at least 8 bytes in size - usually much more. +** Its actual size is stored in the MemJournal.nChunkSize variable. */ struct FileChunk { FileChunk *pNext; /* Next chunk in the journal */ - u8 zChunk[JOURNAL_CHUNKSIZE]; /* Content of this chunk */ + u8 zChunk[8]; /* Content of this chunk */ }; /* +** By default, allocate this many bytes of memory for each FileChunk object. +*/ +#define MEMJOURNAL_DFLT_FILECHUNKSIZE 1024 + +/* +** For chunk size nChunkSize, return the number of bytes that should +** be allocated for each FileChunk structure. +*/ +#define fileChunkSize(nChunkSize) (sizeof(FileChunk) + ((nChunkSize)-8)) + +/* ** An instance of this object serves as a cursor into the rollback journal. ** The cursor can be either for reading or writing. */ @@ -49,14 +53,23 @@ struct FilePoint { }; /* -** This subclass is a subclass of sqlite3_file. Each open memory-journal +** This structure is a subclass of sqlite3_file. Each open memory-journal ** is an instance of this class. */ struct MemJournal { - sqlite3_io_methods *pMethod; /* Parent class. MUST BE FIRST */ + const sqlite3_io_methods *pMethod; /* Parent class. MUST BE FIRST */ + int nChunkSize; /* In-memory chunk-size */ + + int nBuf; /* Bytes of data before flushing */ + int nSize; /* Bytes of data currently in memory */ FileChunk *pFirst; /* Head of in-memory chunk-list */ FilePoint endpoint; /* Pointer to the end of the file */ FilePoint readpoint; /* Pointer to the end of the last xRead() */ + + int flags; /* xOpen flags */ + sqlite3_vfs *pVfs; /* The "real" underlying VFS */ + const char *zJournal; /* Name of the journal file */ + sqlite3_file *pReal; /* The "real" underlying file descriptor */ }; /* @@ -70,42 +83,97 @@ static int memjrnlRead( sqlite_int64 iOfst /* Begin reading at this offset */ ){ MemJournal *p = (MemJournal *)pJfd; - u8 *zOut = zBuf; - int nRead = iAmt; - int iChunkOffset; - FileChunk *pChunk; - - /* SQLite never tries to read past the end of a rollback journal file */ - assert( iOfst+iAmt<=p->endpoint.iOffset ); - - if( p->readpoint.iOffset!=iOfst || iOfst==0 ){ - sqlite3_int64 iOff = 0; - for(pChunk=p->pFirst; - ALWAYS(pChunk) && (iOff+JOURNAL_CHUNKSIZE)<=iOfst; - pChunk=pChunk->pNext - ){ - iOff += JOURNAL_CHUNKSIZE; - } + if( p->pReal ){ + return sqlite3OsRead(p->pReal, zBuf, iAmt, iOfst); + }else if( (iAmt+iOfst)>p->endpoint.iOffset ){ + return SQLITE_IOERR_SHORT_READ; }else{ - pChunk = p->readpoint.pChunk; - } + u8 *zOut = zBuf; + int nRead = iAmt; + int iChunkOffset; + FileChunk *pChunk; + + if( p->readpoint.iOffset!=iOfst || iOfst==0 ){ + sqlite3_int64 iOff = 0; + for(pChunk=p->pFirst; + ALWAYS(pChunk) && (iOff+p->nChunkSize)<=iOfst; + pChunk=pChunk->pNext + ){ + iOff += p->nChunkSize; + } + }else{ + pChunk = p->readpoint.pChunk; + } - iChunkOffset = (int)(iOfst%JOURNAL_CHUNKSIZE); - do { - int iSpace = JOURNAL_CHUNKSIZE - iChunkOffset; - int nCopy = MIN(nRead, (JOURNAL_CHUNKSIZE - iChunkOffset)); - memcpy(zOut, &pChunk->zChunk[iChunkOffset], nCopy); - zOut += nCopy; - nRead -= iSpace; - iChunkOffset = 0; - } while( nRead>=0 && (pChunk=pChunk->pNext)!=0 && nRead>0 ); - p->readpoint.iOffset = iOfst+iAmt; - p->readpoint.pChunk = pChunk; + iChunkOffset = (int)(iOfst%p->nChunkSize); + do { + int iSpace = p->nChunkSize - iChunkOffset; + int nCopy = MIN(nRead, (p->nChunkSize - iChunkOffset)); + memcpy(zOut, &pChunk->zChunk[iChunkOffset], nCopy); + zOut += nCopy; + nRead -= iSpace; + iChunkOffset = 0; + } while( nRead>=0 && (pChunk=pChunk->pNext)!=0 && nRead>0 ); + p->readpoint.iOffset = iOfst+iAmt; + p->readpoint.pChunk = pChunk; + } return SQLITE_OK; } /* +** Free the list of FileChunk structures headed at MemJournal.pFirst. +*/ +static void memjrnlFreeChunks(MemJournal *p){ + FileChunk *pIter; + FileChunk *pNext; + for(pIter=p->pFirst; pIter; pIter=pNext){ + pNext = pIter->pNext; + sqlite3_free(pIter); + } + p->pFirst = 0; +} + +/* +** Flush the contents of memory to a real file on disk. +*/ +static int createFile(MemJournal *p){ + int rc = SQLITE_OK; + if( !p->pReal ){ + sqlite3_file *pReal = (sqlite3_file *)&p[1]; + rc = sqlite3OsOpen(p->pVfs, p->zJournal, pReal, p->flags, 0); + if( rc==SQLITE_OK ){ + int nChunk = p->nChunkSize; + i64 iOff = 0; + FileChunk *pIter; + p->pReal = pReal; + for(pIter=p->pFirst; pIter && rc==SQLITE_OK; pIter=pIter->pNext){ + int nWrite = nChunk; + if( pIter==p->endpoint.pChunk ){ + nWrite = p->endpoint.iOffset % p->nChunkSize; + if( nWrite==0 ) nWrite = p->nChunkSize; + } + rc = sqlite3OsWrite(pReal, pIter->zChunk, nWrite, iOff); + iOff += nWrite; + } + if( rc!=SQLITE_OK ){ + /* If an error occurred while writing to the file, close it before + ** returning. This way, SQLite uses the in-memory journal data to + ** roll back changes made to the internal page-cache before this + ** function was called. */ + sqlite3OsClose(pReal); + p->pReal = 0; + }else{ + /* No error has occurred. Free the in-memory buffers. */ + memjrnlFreeChunks(p); + } + } + } + return rc; +} + + +/* ** Write data to the file. */ static int memjrnlWrite( @@ -118,38 +186,61 @@ static int memjrnlWrite( int nWrite = iAmt; u8 *zWrite = (u8 *)zBuf; - /* An in-memory journal file should only ever be appended to. Random - ** access writes are not required by sqlite. - */ - assert( iOfst==p->endpoint.iOffset ); - UNUSED_PARAMETER(iOfst); - - while( nWrite>0 ){ - FileChunk *pChunk = p->endpoint.pChunk; - int iChunkOffset = (int)(p->endpoint.iOffset%JOURNAL_CHUNKSIZE); - int iSpace = MIN(nWrite, JOURNAL_CHUNKSIZE - iChunkOffset); - - if( iChunkOffset==0 ){ - /* New chunk is required to extend the file. */ - FileChunk *pNew = sqlite3_malloc(sizeof(FileChunk)); - if( !pNew ){ - return SQLITE_IOERR_NOMEM_BKPT; - } - pNew->pNext = 0; - if( pChunk ){ - assert( p->pFirst ); - pChunk->pNext = pNew; - }else{ - assert( !p->pFirst ); - p->pFirst = pNew; - } - p->endpoint.pChunk = pNew; + /* If the file has already been created on disk. */ + if( p->pReal ){ + return sqlite3OsWrite(p->pReal, zBuf, iAmt, iOfst); + } + + /* If the file should be created now. */ + else if( p->nBuf>0 && (iAmt+iOfst)>p->nBuf ){ + int rc = createFile(p); + if( rc==SQLITE_OK ){ + rc = memjrnlWrite(pJfd, zBuf, iAmt, iOfst); } + return rc; + } + + /* If the contents of this write should be stored in memory */ + else{ + /* An in-memory journal file should only ever be appended to. Random + ** access writes are not required. The only exception to this is when + ** the in-memory journal is being used by a connection using the + ** atomic-write optimization. In this case the first 28 bytes of the + ** journal file may be written as part of committing the transaction. */ + assert( iOfst==p->endpoint.iOffset || iOfst==0 ); + if( iOfst==0 && p->pFirst ){ + assert( p->nChunkSize>iAmt ); + memcpy(p->pFirst->zChunk, zBuf, iAmt); + }else{ + while( nWrite>0 ){ + FileChunk *pChunk = p->endpoint.pChunk; + int iChunkOffset = (int)(p->endpoint.iOffset%p->nChunkSize); + int iSpace = MIN(nWrite, p->nChunkSize - iChunkOffset); - memcpy(&p->endpoint.pChunk->zChunk[iChunkOffset], zWrite, iSpace); - zWrite += iSpace; - nWrite -= iSpace; - p->endpoint.iOffset += iSpace; + if( iChunkOffset==0 ){ + /* New chunk is required to extend the file. */ + FileChunk *pNew = sqlite3_malloc(fileChunkSize(p->nChunkSize)); + if( !pNew ){ + return SQLITE_IOERR_NOMEM_BKPT; + } + pNew->pNext = 0; + if( pChunk ){ + assert( p->pFirst ); + pChunk->pNext = pNew; + }else{ + assert( !p->pFirst ); + p->pFirst = pNew; + } + p->endpoint.pChunk = pNew; + } + + memcpy(&p->endpoint.pChunk->zChunk[iChunkOffset], zWrite, iSpace); + zWrite += iSpace; + nWrite -= iSpace; + p->endpoint.iOffset += iSpace; + } + p->nSize = iAmt + iOfst; + } } return SQLITE_OK; @@ -157,19 +248,23 @@ static int memjrnlWrite( /* ** Truncate the file. +** +** If the journal file is already on disk, truncate it there. Or, if it +** is still in main memory but is being truncated to zero bytes in size, +** ignore */ static int memjrnlTruncate(sqlite3_file *pJfd, sqlite_int64 size){ MemJournal *p = (MemJournal *)pJfd; - FileChunk *pChunk; - assert(size==0); - UNUSED_PARAMETER(size); - pChunk = p->pFirst; - while( pChunk ){ - FileChunk *pTmp = pChunk; - pChunk = pChunk->pNext; - sqlite3_free(pTmp); + if( p->pReal ){ + return sqlite3OsTruncate(p->pReal, size); + }else if( size==0 ){ + memjrnlFreeChunks(p); + p->nSize = 0; + p->endpoint.pChunk = 0; + p->endpoint.iOffset = 0; + p->readpoint.pChunk = 0; + p->readpoint.iOffset = 0; } - sqlite3MemJournalOpen(pJfd); return SQLITE_OK; } @@ -177,21 +272,23 @@ static int memjrnlTruncate(sqlite3_file *pJfd, sqlite_int64 size){ ** Close the file. */ static int memjrnlClose(sqlite3_file *pJfd){ - memjrnlTruncate(pJfd, 0); + MemJournal *p = (MemJournal *)pJfd; + memjrnlFreeChunks(p); + if( p->pReal ) sqlite3OsClose(p->pReal); return SQLITE_OK; } - /* ** Sync the file. ** -** Syncing an in-memory journal is a no-op. And, in fact, this routine -** is never called in a working implementation. This implementation -** exists purely as a contingency, in case some malfunction in some other -** part of SQLite causes Sync to be called by mistake. +** If the real file has been created, call its xSync method. Otherwise, +** syncing an in-memory journal is a no-op. */ -static int memjrnlSync(sqlite3_file *NotUsed, int NotUsed2){ - UNUSED_PARAMETER2(NotUsed, NotUsed2); +static int memjrnlSync(sqlite3_file *pJfd, int flags){ + MemJournal *p = (MemJournal *)pJfd; + if( p->pReal ){ + return sqlite3OsSync(p->pReal, flags); + } return SQLITE_OK; } @@ -200,6 +297,9 @@ static int memjrnlSync(sqlite3_file *NotUsed, int NotUsed2){ */ static int memjrnlFileSize(sqlite3_file *pJfd, sqlite_int64 *pSize){ MemJournal *p = (MemJournal *)pJfd; + if( p->pReal ){ + return sqlite3OsFileSize(p->pReal, pSize); + } *pSize = (sqlite_int64) p->endpoint.iOffset; return SQLITE_OK; } @@ -230,26 +330,86 @@ static const struct sqlite3_io_methods MemJournalMethods = { }; /* -** Open a journal file. +** Open a journal file. +** +** The behaviour of the journal file depends on the value of parameter +** nBuf. If nBuf is 0, then the journal file is always create and +** accessed using the underlying VFS. If nBuf is less than zero, then +** all content is always stored in main-memory. Finally, if nBuf is a +** positive value, then the journal file is initially created in-memory +** but may be flushed to disk later on. In this case the journal file is +** flushed to disk either when it grows larger than nBuf bytes in size, +** or when sqlite3JournalCreate() is called. +*/ +int sqlite3JournalOpen( + sqlite3_vfs *pVfs, /* The VFS to use for actual file I/O */ + const char *zName, /* Name of the journal file */ + sqlite3_file *pJfd, /* Preallocated, blank file handle */ + int flags, /* Opening flags */ + int nBuf /* Bytes buffered before opening the file */ +){ + MemJournal *p = (MemJournal*)pJfd; + + /* Zero the file-handle object. If nBuf was passed zero, initialize + ** it using the sqlite3OsOpen() function of the underlying VFS. In this + ** case none of the code in this module is executed as a result of calls + ** made on the journal file-handle. */ + memset(p, 0, sizeof(MemJournal) + (pVfs ? pVfs->szOsFile : 0)); + if( nBuf==0 ){ + return sqlite3OsOpen(pVfs, zName, pJfd, flags, 0); + } + + if( nBuf>0 ){ + p->nChunkSize = nBuf; + }else{ + p->nChunkSize = 8 + MEMJOURNAL_DFLT_FILECHUNKSIZE - sizeof(FileChunk); + assert( MEMJOURNAL_DFLT_FILECHUNKSIZE==fileChunkSize(p->nChunkSize) ); + } + + p->pMethod = (const sqlite3_io_methods*)&MemJournalMethods; + p->nBuf = nBuf; + p->flags = flags; + p->zJournal = zName; + p->pVfs = pVfs; + return SQLITE_OK; +} + +/* +** Open an in-memory journal file. */ void sqlite3MemJournalOpen(sqlite3_file *pJfd){ - MemJournal *p = (MemJournal *)pJfd; - assert( EIGHT_BYTE_ALIGNMENT(p) ); - memset(p, 0, sqlite3MemJournalSize()); - p->pMethod = (sqlite3_io_methods*)&MemJournalMethods; + sqlite3JournalOpen(0, 0, pJfd, 0, -1); +} + +#ifdef SQLITE_ENABLE_ATOMIC_WRITE +/* +** If the argument p points to a MemJournal structure that is not an +** in-memory-only journal file (i.e. is one that was opened with a +ve +** nBuf parameter), and the underlying file has not yet been created, +** create it now. +*/ +int sqlite3JournalCreate(sqlite3_file *p){ + int rc = SQLITE_OK; + if( p->pMethods==&MemJournalMethods && ((MemJournal*)p)->nBuf>0 ){ + rc = createFile((MemJournal*)p); + } + return rc; } +#endif /* -** Return true if the file-handle passed as an argument is -** an in-memory journal +** The file-handle passed as the only argument is open on a journal file. +** Return true if this "journal file" is currently stored in heap memory, +** or false otherwise. */ -int sqlite3IsMemJournal(sqlite3_file *pJfd){ - return pJfd->pMethods==&MemJournalMethods; +int sqlite3JournalIsInMemory(sqlite3_file *p){ + return p->pMethods==&MemJournalMethods && ((MemJournal*)p)->pReal==0; } /* -** Return the number of bytes required to store a MemJournal file descriptor. +** Return the number of bytes required to store a JournalFile that uses vfs +** pVfs to create the underlying on-disk files. */ -int sqlite3MemJournalSize(void){ - return sizeof(MemJournal); +int sqlite3JournalSize(sqlite3_vfs *pVfs){ + return pVfs->szOsFile + sizeof(MemJournal); } @@ -66,7 +66,7 @@ int sqlite3_open_file_count = 0; #if defined(SQLITE_TEST) int sqlite3_memdebug_vfs_oom_test = 1; #define DO_OS_MALLOC_TEST(x) \ - if (sqlite3_memdebug_vfs_oom_test && (!x || !sqlite3IsMemJournal(x))) { \ + if (sqlite3_memdebug_vfs_oom_test && (!x || !sqlite3JournalIsInMemory(x))) { \ void *pTstAlloc = sqlite3Malloc(10); \ if (!pTstAlloc) return SQLITE_IOERR_NOMEM_BKPT; \ sqlite3_free(pTstAlloc); \ diff --git a/src/pager.c b/src/pager.c index 51bd45e48..c74748c8e 100644 --- a/src/pager.c +++ b/src/pager.c @@ -1343,6 +1343,7 @@ static i64 journalHdrOffset(Pager *pPager){ static int zeroJournalHdr(Pager *pPager, int doTruncate){ int rc = SQLITE_OK; /* Return code */ assert( isOpen(pPager->jfd) ); + assert( !sqlite3JournalIsInMemory(pPager->jfd) ); if( pPager->journalOff ){ const i64 iLimit = pPager->journalSizeLimit; /* Local cache of jsl */ @@ -1724,7 +1725,7 @@ static void releaseAllSavepoints(Pager *pPager){ for(ii=0; ii<pPager->nSavepoint; ii++){ sqlite3BitvecDestroy(pPager->aSavepoint[ii].pInSavepoint); } - if( !pPager->exclusiveMode || sqlite3IsMemJournal(pPager->sjfd) ){ + if( !pPager->exclusiveMode || sqlite3JournalIsInMemory(pPager->sjfd) ){ sqlite3OsClose(pPager->sjfd); } sqlite3_free(pPager->aSavepoint); @@ -1962,8 +1963,8 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){ assert( !pagerUseWal(pPager) ); /* Finalize the journal file. */ - if( sqlite3IsMemJournal(pPager->jfd) ){ - assert( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ); + if( sqlite3JournalIsInMemory(pPager->jfd) ){ + /* assert( pPager->journalMode==PAGER_JOURNALMODE_MEMORY ); */ sqlite3OsClose(pPager->jfd); }else if( pPager->journalMode==PAGER_JOURNALMODE_TRUNCATE ){ if( pPager->journalOff==0 ){ @@ -1989,9 +1990,10 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){ /* This branch may be executed with Pager.journalMode==MEMORY if ** a hot-journal was just rolled back. In this case the journal ** file should be closed and deleted. If this connection writes to - ** the database file, it will do so using an in-memory journal. + ** the database file, it will do so using an in-memory journal. */ - int bDelete = (!pPager->tempFile && sqlite3JournalExists(pPager->jfd)); + int bDelete = !pPager->tempFile; + assert( sqlite3JournalIsInMemory(pPager->jfd)==0 ); assert( pPager->journalMode==PAGER_JOURNALMODE_DELETE || pPager->journalMode==PAGER_JOURNALMODE_MEMORY || pPager->journalMode==PAGER_JOURNALMODE_WAL @@ -2729,7 +2731,7 @@ static int pager_playback(Pager *pPager, int isHot){ ** TODO: Technically the following is an error because it assumes that ** buffer Pager.pTmpSpace is (mxPathname+1) bytes or larger. i.e. that ** (pPager->pageSize >= pPager->pVfs->mxPathname+1). Using os_unix.c, - ** mxPathname is 512, which is the same as the minimum allowable value + ** mxPathname is 512, which is the same as the minimum allowable value ** for pageSize. */ zMaster = pPager->pTmpSpace; @@ -4353,11 +4355,14 @@ static int pager_write_pagelist(Pager *pPager, PgHdr *pList){ static int openSubJournal(Pager *pPager){ int rc = SQLITE_OK; if( !isOpen(pPager->sjfd) ){ + const int flags = SQLITE_OPEN_SUBJOURNAL | SQLITE_OPEN_READWRITE + | SQLITE_OPEN_CREATE | SQLITE_OPEN_EXCLUSIVE + | SQLITE_OPEN_DELETEONCLOSE; + int nBuf = 64*1024; if( pPager->journalMode==PAGER_JOURNALMODE_MEMORY || pPager->subjInMemory ){ - sqlite3MemJournalOpen(pPager->sjfd); - }else{ - rc = pagerOpentemp(pPager, pPager->sjfd, SQLITE_OPEN_SUBJOURNAL); + nBuf = -1; } + rc = sqlite3JournalOpen(pPager->pVfs, 0, pPager->sjfd, flags, nBuf); } return rc; } @@ -4578,18 +4583,8 @@ int sqlite3PagerOpen( int nUri = 0; /* Number of bytes of URI args at *zUri */ /* Figure out how much space is required for each journal file-handle - ** (there are two of them, the main journal and the sub-journal). This - ** is the maximum space required for an in-memory journal file handle - ** and a regular journal file-handle. Note that a "regular journal-handle" - ** may be a wrapper capable of caching the first portion of the journal - ** file in memory to implement the atomic-write optimization (see - ** source file journal.c). - */ - if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){ - journalFileSize = ROUND8(sqlite3JournalSize(pVfs)); - }else{ - journalFileSize = ROUND8(sqlite3MemJournalSize()); - } + ** (there are two of them, the main journal and the sub-journal). */ + journalFileSize = ROUND8(sqlite3JournalSize(pVfs)); /* Set the output variable to NULL in case an error occurs. */ *ppPager = 0; @@ -6667,7 +6662,7 @@ int sqlite3PagerSavepoint(Pager *pPager, int op, int iSavepoint){ if( op==SAVEPOINT_RELEASE ){ if( nNew==0 && isOpen(pPager->sjfd) ){ /* Only truncate if it is an in-memory sub-journal. */ - if( sqlite3IsMemJournal(pPager->sjfd) ){ + if( sqlite3JournalIsInMemory(pPager->sjfd) ){ rc = sqlite3OsTruncate(pPager->sjfd, 0); assert( rc==SQLITE_OK ); } diff --git a/src/sqliteInt.h b/src/sqliteInt.h index a37da33ed..387bb7436 100644 --- a/src/sqliteInt.h +++ b/src/sqliteInt.h @@ -3998,19 +3998,14 @@ const char *sqlite3JournalModename(int); #define IN_INDEX_LOOP 0x0004 /* IN operator used as a loop */ int sqlite3FindInIndex(Parse *, Expr *, u32, int*); +int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); +int sqlite3JournalSize(sqlite3_vfs *); #ifdef SQLITE_ENABLE_ATOMIC_WRITE - int sqlite3JournalOpen(sqlite3_vfs *, const char *, sqlite3_file *, int, int); - int sqlite3JournalSize(sqlite3_vfs *); int sqlite3JournalCreate(sqlite3_file *); - int sqlite3JournalExists(sqlite3_file *p); -#else - #define sqlite3JournalSize(pVfs) ((pVfs)->szOsFile) - #define sqlite3JournalExists(p) 1 #endif +int sqlite3JournalIsInMemory(sqlite3_file *p); void sqlite3MemJournalOpen(sqlite3_file *); -int sqlite3MemJournalSize(void); -int sqlite3IsMemJournal(sqlite3_file *); void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p); #if SQLITE_MAX_EXPR_DEPTH>0 |