contrib/sqlite3/sqlite3.c

50224 **  |  database page content   |  PgHdr1  |  MemPage  |  PgHdr  |
50228 ** flow harmlessly into the PgHdr1, MemPage, and PgHdr extensions).   MemPage
50232 ** of which pages are "dirty".  PgHdr1 is an extension added by this
50233 ** module (pcache1.c).  The PgHdr1 header is a subclass of sqlite3_pcache_page.
50234 ** PgHdr1 contains information needed to look up a page by its page number.
50238 ** The size of the extension (MemPage+PgHdr+PgHdr1) can be determined at
50251 ** This module tracks pointers to PgHdr1 objects.  Only pcache.c communicates
50252 ** with this module.  Information is passed back and forth as PgHdr1 pointers.
50288 typedef struct PgHdr1 PgHdr1;
50295 ** PgHdr1.pCache->szPage bytes is allocated directly before this structure
50308 struct PgHdr1 {
50313   PgHdr1 *pNext;                 /* Next in hash table chain */
50315   PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
50316   PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
50355   PgHdr1 lru;                    /* The beginning and end of the LRU list */
50391   PgHdr1 **apHash;                    /* Hash table for fast lookup by key */
50392   PgHdr1 *pFree;                      /* List of unused pcache-local pages */
50512       PgHdr1 *pX = (PgHdr1*)&zBulk[pCache->szPage];
50540     p = (PgHdr1 *)pcache1.pFree;
50623 static PgHdr1 *pcache1AllocPage(PCache1 *pCache, int benignMalloc){
50624   PgHdr1 *p = 0;
50645     p = sqlite3Malloc(sizeof(PgHdr1) + pCache->szExtra);
50660     p = (PgHdr1 *)&((u8 *)pPg)[pCache->szPage];
50675 static void pcache1FreePage(PgHdr1 *p){
50744   PgHdr1 **apNew;
50757   apNew = (PgHdr1 **)sqlite3MallocZero(sizeof(PgHdr1 *)*nNew);
50762       PgHdr1 *pPage;
50763       PgHdr1 *pNext = p->apHash[i];
50784 static PgHdr1 *pcache1PinPage(PgHdr1 *pPage){
50809 static void pcache1RemoveFromHash(PgHdr1 *pPage, int freeFlag){
50812   PgHdr1 **pp;
50829   PgHdr1 *p;
50876     PgHdr1 **pp;
50877     PgHdr1 *pPage;
50995     pCache->szAlloc = szPage + szExtra + ROUND8(sizeof(PgHdr1));
51074 static SQLITE_NOINLINE PgHdr1 *pcache1FetchStage2(
51081   PgHdr1 *pPage = 0;
51202 static PgHdr1 *pcache1FetchNoMutex(
51208   PgHdr1 *pPage = 0;
51232 static PgHdr1 *pcache1FetchWithMutex(
51238   PgHdr1 *pPage;
51256   assert( offsetof(PgHdr1,page)==0 );
51284   PgHdr1 *pPage = (PgHdr1 *)pPg;
51300     PgHdr1 **ppFirst = &pGroup->lru.pLruNext;
51320   PgHdr1 *pPage = (PgHdr1 *)pPg;
51321   PgHdr1 **pp;
51413 SQLITE_PRIVATE int sqlite3HeaderSizePcache1(void){ return ROUND8(sizeof(PgHdr1)); }
51438     PgHdr1 *p;
51469   PgHdr1 *p;