mirror of https://github.com/sqlite/sqlite
Combine the pcacheAddToDirtyList() and pcacheRemoveFromDirtyList() routines
into a single pcacheManageDirtyList() routine. The resulting binary code is slightly faster and a few bytes smaller. FossilOrigin-Name: 6bcf1af6a48dbda5ac6f6b3b02810bdfc4730000
This commit is contained in:
drh
parent
2f2b2b8580
commit
a8dcba9199
12
manifest
12
manifest
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@ -1,5 +1,5 @@
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C Performance\senhancement\sin\ssqlite3PutVarint().
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D 2014-08-22T18:48:25.634
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C Combine\sthe\spcacheAddToDirtyList()\sand\spcacheRemoveFromDirtyList()\sroutines\ninto\sa\ssingle\spcacheManageDirtyList()\sroutine.\s\sThe\sresulting\sbinary\scode\sis\nslightly\sfaster\sand\sa\sfew\sbytes\ssmaller.
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D 2014-08-22T20:35:29.948
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F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
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F Makefile.in 5eb79e334a5de69c87740edd56af6527dd219308
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F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
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@ -214,7 +214,7 @@ F src/os_win.h 09e751b20bbc107ffbd46e13555dc73576d88e21
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F src/pager.c f6bb1fa6cdf2062f2d8aec3e64db302bca519ab8
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F src/pager.h ffd5607f7b3e4590b415b007a4382f693334d428
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F src/parse.y 22d6a074e5f5a7258947a1dc55a9bf946b765dd0
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F src/pcache.c d8eafac28290d4bb80332005435db44991d07fc2
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F src/pcache.c da602c5447051705cab41604bf3276815eb569d0
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F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
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F src/pcache1.c 102e6f5a2fbc646154463eb856d1fd716867b64c
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F src/pragma.c d10ef67c4de79f78188b965b4b7988aff1d66f2e
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@ -1188,7 +1188,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
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F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
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F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
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F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
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P cf561d1f0bb60b3d638632d20bd686dda4fa4a04
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R 892fbe852e37f91de1b9f5afa35c0502
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P a929be551924144c9bc7aab608404d59e479abb5
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R 2ac5f67b7ba10391163889b9ff4c4145
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U drh
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Z c70614e9322ab39ef4e9fbe07eb13b05
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Z 6bffc4c72a94895b60e52defb6944efd
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@ -1 +1 @@
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a929be551924144c9bc7aab608404d59e479abb5
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6bcf1af6a48dbda5ac6f6b3b02810bdfc4730000
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150
src/pcache.c
150
src/pcache.c
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@ -62,71 +62,73 @@ static int pcacheCheckSynced(PCache *pCache){
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}
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#endif /* !NDEBUG && SQLITE_ENABLE_EXPENSIVE_ASSERT */
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/*
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** Remove page pPage from the list of dirty pages.
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*/
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static void pcacheRemoveFromDirtyList(PgHdr *pPage){
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PCache *p = pPage->pCache;
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assert( pPage->pDirtyNext || pPage==p->pDirtyTail );
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assert( pPage->pDirtyPrev || pPage==p->pDirty );
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/* Update the PCache1.pSynced variable if necessary. */
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if( p->pSynced==pPage ){
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PgHdr *pSynced = pPage->pDirtyPrev;
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while( pSynced && (pSynced->flags&PGHDR_NEED_SYNC) ){
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pSynced = pSynced->pDirtyPrev;
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}
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p->pSynced = pSynced;
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}
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if( pPage->pDirtyNext ){
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pPage->pDirtyNext->pDirtyPrev = pPage->pDirtyPrev;
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}else{
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assert( pPage==p->pDirtyTail );
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p->pDirtyTail = pPage->pDirtyPrev;
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}
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if( pPage->pDirtyPrev ){
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pPage->pDirtyPrev->pDirtyNext = pPage->pDirtyNext;
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}else{
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assert( pPage==p->pDirty );
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p->pDirty = pPage->pDirtyNext;
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if( p->pDirty==0 && p->bPurgeable ){
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assert( p->eCreate==1 );
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p->eCreate = 2;
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}
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}
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pPage->pDirtyNext = 0;
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pPage->pDirtyPrev = 0;
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expensive_assert( pcacheCheckSynced(p) );
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}
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/* Allowed values for second argument to pcacheManageDirtyList() */
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#define PCACHE_DIRTYLIST_REMOVE 1 /* Remove pPage from dirty list */
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#define PCACHE_DIRTYLIST_ADD 2 /* Add pPage to the dirty list */
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#define PCACHE_DIRTYLIST_FRONT 3 /* Move pPage to the front of the list */
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/*
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** Add page pPage to the head of the dirty list (PCache1.pDirty is set to
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** pPage).
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** Manage pPage's participation on the dirty list. Bits of the addRemove
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** argument determines what operation to do. The 0x01 bit means first
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** remove pPage from the dirty list. The 0x02 means add pPage back to
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** the dirty list. Doing both moves pPage to the front of the dirty list.
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*/
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static void pcacheAddToDirtyList(PgHdr *pPage){
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static void pcacheManageDirtyList(PgHdr *pPage, u8 addRemove){
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PCache *p = pPage->pCache;
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assert( pPage->pDirtyNext==0 && pPage->pDirtyPrev==0 && p->pDirty!=pPage );
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pPage->pDirtyNext = p->pDirty;
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if( pPage->pDirtyNext ){
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assert( pPage->pDirtyNext->pDirtyPrev==0 );
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pPage->pDirtyNext->pDirtyPrev = pPage;
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}else if( p->bPurgeable ){
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assert( p->eCreate==2 );
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p->eCreate = 1;
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if( addRemove & PCACHE_DIRTYLIST_REMOVE ){
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assert( pPage->pDirtyNext || pPage==p->pDirtyTail );
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assert( pPage->pDirtyPrev || pPage==p->pDirty );
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/* Update the PCache1.pSynced variable if necessary. */
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if( p->pSynced==pPage ){
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PgHdr *pSynced = pPage->pDirtyPrev;
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while( pSynced && (pSynced->flags&PGHDR_NEED_SYNC) ){
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pSynced = pSynced->pDirtyPrev;
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}
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p->pSynced = pSynced;
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}
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if( pPage->pDirtyNext ){
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pPage->pDirtyNext->pDirtyPrev = pPage->pDirtyPrev;
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}else{
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assert( pPage==p->pDirtyTail );
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p->pDirtyTail = pPage->pDirtyPrev;
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}
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if( pPage->pDirtyPrev ){
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pPage->pDirtyPrev->pDirtyNext = pPage->pDirtyNext;
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}else{
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assert( pPage==p->pDirty );
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p->pDirty = pPage->pDirtyNext;
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if( p->pDirty==0 && p->bPurgeable ){
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assert( p->eCreate==1 );
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p->eCreate = 2;
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}
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}
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pPage->pDirtyNext = 0;
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pPage->pDirtyPrev = 0;
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expensive_assert( pcacheCheckSynced(p) );
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}
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p->pDirty = pPage;
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if( !p->pDirtyTail ){
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p->pDirtyTail = pPage;
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if( addRemove & PCACHE_DIRTYLIST_ADD ){
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assert( pPage->pDirtyNext==0 && pPage->pDirtyPrev==0 && p->pDirty!=pPage );
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pPage->pDirtyNext = p->pDirty;
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if( pPage->pDirtyNext ){
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assert( pPage->pDirtyNext->pDirtyPrev==0 );
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pPage->pDirtyNext->pDirtyPrev = pPage;
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}else if( p->bPurgeable ){
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assert( p->eCreate==2 );
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p->eCreate = 1;
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}
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p->pDirty = pPage;
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if( !p->pDirtyTail ){
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p->pDirtyTail = pPage;
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}
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if( !p->pSynced && 0==(pPage->flags&PGHDR_NEED_SYNC) ){
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p->pSynced = pPage;
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}
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expensive_assert( pcacheCheckSynced(p) );
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}
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if( !p->pSynced && 0==(pPage->flags&PGHDR_NEED_SYNC) ){
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p->pSynced = pPage;
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}
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expensive_assert( pcacheCheckSynced(p) );
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}
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/*
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@ -134,12 +136,11 @@ static void pcacheAddToDirtyList(PgHdr *pPage){
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** being used for an in-memory database, this function is a no-op.
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*/
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static void pcacheUnpin(PgHdr *p){
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PCache *pCache = p->pCache;
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if( pCache->bPurgeable ){
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if( p->pCache->bPurgeable ){
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if( p->pgno==1 ){
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pCache->pPage1 = 0;
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p->pCache->pPage1 = 0;
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}
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sqlite3GlobalConfig.pcache2.xUnpin(pCache->pCache, p->pPage, 0);
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sqlite3GlobalConfig.pcache2.xUnpin(p->pCache->pCache, p->pPage, 0);
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}
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}
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@ -332,18 +333,16 @@ int sqlite3PcacheFetch(
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** Decrement the reference count on a page. If the page is clean and the
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** reference count drops to 0, then it is made elible for recycling.
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*/
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void sqlite3PcacheRelease(PgHdr *p){
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void SQLITE_NOINLINE sqlite3PcacheRelease(PgHdr *p){
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assert( p->nRef>0 );
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p->nRef--;
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if( p->nRef==0 ){
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PCache *pCache = p->pCache;
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pCache->nRef--;
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p->pCache->nRef--;
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if( (p->flags&PGHDR_DIRTY)==0 ){
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pcacheUnpin(p);
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}else{
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/* Move the page to the head of the dirty list. */
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pcacheRemoveFromDirtyList(p);
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pcacheAddToDirtyList(p);
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pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT);
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}
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}
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}
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@ -362,17 +361,15 @@ void sqlite3PcacheRef(PgHdr *p){
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** page pointed to by p is invalid.
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*/
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void sqlite3PcacheDrop(PgHdr *p){
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PCache *pCache;
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assert( p->nRef==1 );
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if( p->flags&PGHDR_DIRTY ){
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pcacheRemoveFromDirtyList(p);
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pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE);
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}
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pCache = p->pCache;
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pCache->nRef--;
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p->pCache->nRef--;
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if( p->pgno==1 ){
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pCache->pPage1 = 0;
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p->pCache->pPage1 = 0;
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}
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sqlite3GlobalConfig.pcache2.xUnpin(pCache->pCache, p->pPage, 1);
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sqlite3GlobalConfig.pcache2.xUnpin(p->pCache->pCache, p->pPage, 1);
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}
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/*
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@ -384,7 +381,7 @@ void sqlite3PcacheMakeDirty(PgHdr *p){
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assert( p->nRef>0 );
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if( 0==(p->flags & PGHDR_DIRTY) ){
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p->flags |= PGHDR_DIRTY;
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pcacheAddToDirtyList( p);
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pcacheManageDirtyList(p, PCACHE_DIRTYLIST_ADD);
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}
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}
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@ -394,7 +391,7 @@ void sqlite3PcacheMakeDirty(PgHdr *p){
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*/
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void sqlite3PcacheMakeClean(PgHdr *p){
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if( (p->flags & PGHDR_DIRTY) ){
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pcacheRemoveFromDirtyList(p);
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pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE);
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p->flags &= ~(PGHDR_DIRTY|PGHDR_NEED_SYNC);
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if( p->nRef==0 ){
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pcacheUnpin(p);
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@ -433,8 +430,7 @@ void sqlite3PcacheMove(PgHdr *p, Pgno newPgno){
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sqlite3GlobalConfig.pcache2.xRekey(pCache->pCache, p->pPage, p->pgno,newPgno);
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p->pgno = newPgno;
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if( (p->flags&PGHDR_DIRTY) && (p->flags&PGHDR_NEED_SYNC) ){
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pcacheRemoveFromDirtyList(p);
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pcacheAddToDirtyList(p);
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pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT);
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}
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}
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