diff options
Diffstat (limited to 'src/os_win.c')
| -rw-r--r-- | src/os_win.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/os_win.c b/src/os_win.c index aeb08814b..07b74cbe2 100644 --- a/src/os_win.c +++ b/src/os_win.c @@ -2816,6 +2816,9 @@ static void winModeBit(winFile *pFile, unsigned char mask, int *pArg){ /* Forward declaration */ static int getTempname(int nBuf, char *zBuf); +#if SQLITE_MAX_MMAP_SIZE>0 +static int winMapfile(winFile*, sqlite3_int64); +#endif /* ** Control and query of the open file handle. @@ -2899,13 +2902,20 @@ static int winFileControl(sqlite3_file *id, int op, void *pArg){ #if SQLITE_MAX_MMAP_SIZE>0 case SQLITE_FCNTL_MMAP_SIZE: { i64 newLimit = *(i64*)pArg; + int rc = SQLITE_OK; if( newLimit>sqlite3GlobalConfig.mxMmap ){ newLimit = sqlite3GlobalConfig.mxMmap; } *(i64*)pArg = pFile->mmapSizeMax; - if( newLimit>=0 ) pFile->mmapSizeMax = newLimit; - OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h)); - return SQLITE_OK; + if( newLimit>=0 && newLimit!=pFile->mmapSizeMax && pFile->nFetchOut==0 ){ + pFile->mmapSizeMax = newLimit; + if( pFile->mmapSize>0 ){ + (void)winUnmapfile(pFile); + rc = winMapfile(pFile, -1); + } + } + OSTRACE(("FCNTL file=%p, rc=%d\n", pFile->h, rc)); + return rc; } #endif } |