diff options
Diffstat (limited to 'ext/sqlite3/libsqlite/sqlite3.c')
| -rw-r--r-- | ext/sqlite3/libsqlite/sqlite3.c | 44 |
1 files changed, 32 insertions, 12 deletions
diff --git a/ext/sqlite3/libsqlite/sqlite3.c b/ext/sqlite3/libsqlite/sqlite3.c index 1f085b01cb..ccddfe69b2 100644 --- a/ext/sqlite3/libsqlite/sqlite3.c +++ b/ext/sqlite3/libsqlite/sqlite3.c @@ -1,6 +1,6 @@ /****************************************************************************** ** This file is an amalgamation of many separate C source files from SQLite -** version 3.14.0. By combining all the individual C code files into this +** version 3.14.1. By combining all the individual C code files into this ** single large file, the entire code can be compiled as a single translation ** unit. This allows many compilers to do optimizations that would not be ** possible if the files were compiled separately. Performance improvements @@ -380,9 +380,9 @@ extern "C" { ** [sqlite3_libversion_number()], [sqlite3_sourceid()], ** [sqlite_version()] and [sqlite_source_id()]. */ -#define SQLITE_VERSION "3.14.0" -#define SQLITE_VERSION_NUMBER 3014000 -#define SQLITE_SOURCE_ID "2016-08-08 13:40:27 d5e98057028abcf7217d0d2b2e29bbbcdf09d6de" +#define SQLITE_VERSION "3.14.1" +#define SQLITE_VERSION_NUMBER 3014001 +#define SQLITE_SOURCE_ID "2016-08-11 18:53:32 a12d8059770df4bca59e321c266410344242bf7b" /* ** CAPI3REF: Run-Time Library Version Numbers @@ -44998,12 +44998,30 @@ static void pcache1TruncateUnsafe( PCache1 *pCache, /* The cache to truncate */ unsigned int iLimit /* Drop pages with this pgno or larger */ ){ - TESTONLY( unsigned int nPage = 0; ) /* To assert pCache->nPage is correct */ - unsigned int h; + TESTONLY( int nPage = 0; ) /* To assert pCache->nPage is correct */ + unsigned int h, iStop; assert( sqlite3_mutex_held(pCache->pGroup->mutex) ); - for(h=0; h<pCache->nHash; h++){ - PgHdr1 **pp = &pCache->apHash[h]; + assert( pCache->iMaxKey >= iLimit ); + assert( pCache->nHash > 0 ); + if( pCache->iMaxKey - iLimit < pCache->nHash ){ + /* If we are just shaving the last few pages off the end of the + ** cache, then there is no point in scanning the entire hash table. + ** Only scan those hash slots that might contain pages that need to + ** be removed. */ + h = iLimit % pCache->nHash; + iStop = pCache->iMaxKey % pCache->nHash; + TESTONLY( nPage = -10; ) /* Disable the pCache->nPage validity check */ + }else{ + /* This is the general case where many pages are being removed. + ** It is necessary to scan the entire hash table */ + h = pCache->nHash/2; + iStop = h - 1; + } + for(;;){ + PgHdr1 **pp; PgHdr1 *pPage; + assert( h<pCache->nHash ); + pp = &pCache->apHash[h]; while( (pPage = *pp)!=0 ){ if( pPage->iKey>=iLimit ){ pCache->nPage--; @@ -45012,11 +45030,13 @@ static void pcache1TruncateUnsafe( pcache1FreePage(pPage); }else{ pp = &pPage->pNext; - TESTONLY( nPage++; ) + TESTONLY( if( nPage>=0 ) nPage++; ) } } + if( h==iStop ) break; + h = (h+1) % pCache->nHash; } - assert( pCache->nPage==nPage ); + assert( nPage<0 || pCache->nPage==(unsigned)nPage ); } /******************************************************************************/ @@ -45493,7 +45513,7 @@ static void pcache1Destroy(sqlite3_pcache *p){ PGroup *pGroup = pCache->pGroup; assert( pCache->bPurgeable || (pCache->nMax==0 && pCache->nMin==0) ); pcache1EnterMutex(pGroup); - pcache1TruncateUnsafe(pCache, 0); + if( pCache->nPage ) pcache1TruncateUnsafe(pCache, 0); assert( pGroup->nMaxPage >= pCache->nMax ); pGroup->nMaxPage -= pCache->nMax; assert( pGroup->nMinPage >= pCache->nMin ); @@ -194000,7 +194020,7 @@ static void fts5SourceIdFunc( ){ assert( nArg==0 ); UNUSED_PARAM2(nArg, apUnused); - sqlite3_result_text(pCtx, "fts5: 2016-08-08 13:40:27 d5e98057028abcf7217d0d2b2e29bbbcdf09d6de", -1, SQLITE_TRANSIENT); + sqlite3_result_text(pCtx, "fts5: 2016-08-11 18:53:32 a12d8059770df4bca59e321c266410344242bf7b", -1, SQLITE_TRANSIENT); } static int fts5Init(sqlite3 *db){ |