/* ** Make sure the page is marked as dirty. If it isn't dirty already, ** make it so. */ void sqlite3PcacheMakeDirty(PgHdr *p){ p->flags &= ~PGHDR_DONT_WRITE; assert( p->nRef>0 ); if( 0==(p->flags & PGHDR_DIRTY) ){ p->flags |= PGHDR_DIRTY; pcacheManageDirtyList(p, PCACHE_DIRTYLIST_ADD); } }
/* ** Drop a page from the cache. There must be exactly one reference to the ** page. This function deletes that reference, so after it returns the ** page pointed to by p is invalid. */ void sqlite3PcacheDrop(PgHdr *p){ assert( p->nRef==1 ); assert( sqlite3PcachePageSanity(p) ); if( p->flags&PGHDR_DIRTY ){ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE); } p->pCache->nRefSum--; sqlite3GlobalConfig.pcache2.xUnpin(p->pCache->pCache, p->pPage, 1); }
/* ** Make sure the page is marked as clean. If it isn't clean already, ** make it so. */ void sqlite3PcacheMakeClean(PgHdr *p){ if( (p->flags & PGHDR_DIRTY) ){ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE); p->flags &= ~(PGHDR_DIRTY|PGHDR_NEED_SYNC); if( p->nRef==0 ){ pcacheUnpin(p); } } }
/* ** Change the page number of page p to newPgno. */ void sqlite3PcacheMove(PgHdr *p, Pgno newPgno){ PCache *pCache = p->pCache; assert( p->nRef>0 ); assert( newPgno>0 ); sqlite3GlobalConfig.pcache2.xRekey(pCache->pCache, p->pPage, p->pgno,newPgno); p->pgno = newPgno; if( (p->flags&PGHDR_DIRTY) && (p->flags&PGHDR_NEED_SYNC) ){ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT); } }
/* ** Decrement the reference count on a page. If the page is clean and the ** reference count drops to 0, then it is made eligible for recycling. */ void SQLITE_NOINLINE sqlite3PcacheRelease(PgHdr *p){ assert( p->nRef>0 ); p->pCache->nRefSum--; if( (--p->nRef)==0 ){ if( p->flags&PGHDR_CLEAN ){ pcacheUnpin(p); }else{ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT); } } }
/* ** Drop a page from the cache. There must be exactly one reference to the ** page. This function deletes that reference, so after it returns the ** page pointed to by p is invalid. */ void sqlite3PcacheDrop(PgHdr *p){ assert( p->nRef==1 ); if( p->flags&PGHDR_DIRTY ){ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE); } p->pCache->nRef--; if( p->pgno==1 ){ p->pCache->pPage1 = 0; } sqlite3GlobalConfig.pcache2.xUnpin(p->pCache->pCache, p->pPage, 1); }
/* ** Decrement the reference count on a page. If the page is clean and the ** reference count drops to 0, then it is made eligible for recycling. */ void SQLITE_NOINLINE sqlite3PcacheRelease(PgHdr *p){ assert( p->nRef>0 ); p->nRef--; if( p->nRef==0 ){ p->pCache->nRef--; if( (p->flags&PGHDR_DIRTY)==0 ){ pcacheUnpin(p); }else if( p->pDirtyPrev!=0 ){ /* Move the page to the head of the dirty list. */ pcacheManageDirtyList(p, PCACHE_DIRTYLIST_FRONT); } } }
/* ** Make sure the page is marked as clean. If it isn't clean already, ** make it so. */ void sqlite3PcacheMakeClean(PgHdr *p){ assert( sqlite3PcachePageSanity(p) ); if( ALWAYS((p->flags & PGHDR_DIRTY)!=0) ){ assert( (p->flags & PGHDR_CLEAN)==0 ); pcacheManageDirtyList(p, PCACHE_DIRTYLIST_REMOVE); p->flags &= ~(PGHDR_DIRTY|PGHDR_NEED_SYNC|PGHDR_WRITEABLE); p->flags |= PGHDR_CLEAN; pcacheTrace(("%p.CLEAN %d\n",p->pCache,p->pgno)); assert( sqlite3PcachePageSanity(p) ); if( p->nRef==0 ){ pcacheUnpin(p); } } }
/* ** Make sure the page is marked as dirty. If it isn't dirty already, ** make it so. */ void sqlite3PcacheMakeDirty(PgHdr *p){ assert( p->nRef>0 ); assert( sqlite3PcachePageSanity(p) ); if( p->flags & (PGHDR_CLEAN|PGHDR_DONT_WRITE) ){ /*OPTIMIZATION-IF-FALSE*/ p->flags &= ~PGHDR_DONT_WRITE; if( p->flags & PGHDR_CLEAN ){ p->flags ^= (PGHDR_DIRTY|PGHDR_CLEAN); pcacheTrace(("%p.DIRTY %d\n",p->pCache,p->pgno)); assert( (p->flags & (PGHDR_DIRTY|PGHDR_CLEAN))==PGHDR_DIRTY ); pcacheManageDirtyList(p, PCACHE_DIRTYLIST_ADD); } assert( sqlite3PcachePageSanity(p) ); } }