lib/sqlite/sqlite3.c

15977   Mem3Block *pBlock;
15979   pBlock = (Mem3Block*)p;
15980   assert( (pBlock[-1].u.hdr.size4x&1)!=0 );
15981   return (pBlock[-1].u.hdr.size4x&~3)*2 - 4;
35997 #define PAGE_SET_BLOCKPTR(pCache, pPg, pBlock) \
35998   ( *(PGroupBlock **)&(((u8*)pPg)[sizeof(PgHdr1) + pCache->szPage]) = pBlock )
36131 ** The block pBlock belongs to list pList but is not currently linked in.
36134 static void addBlockToList(PGroupBlockList *pList, PGroupBlock *pBlock){
36135   pBlock->pPrev = 0;
36136   pBlock->pNext = pList->pFirst;
36137   pList->pFirst = pBlock;
36138   if( pBlock->pNext ){
36139     pBlock->pNext->pPrev = pBlock;
36142     pList->pLast = pBlock;
36172   PGroupBlock *pBlock;
36203   pBlock = pList->pFirst;
36204   if( pBlock==0 || pBlock->mUsed==(((Bitmask)1<<pBlock->nEntry)-1) ){
36214     pBlock = (PGroupBlock *)sqlite3Malloc(sz);
36217     if( !pBlock ){
36221     pBlock->nEntry = (sqlite3MallocSize(pBlock) - sizeof(PGroupBlock)) / nByte;
36222     if( pBlock->nEntry>=BMS ){
36223       pBlock->nEntry = BMS-1;
36225     pBlock->pList = pList;
36226     pBlock->mUsed = 0;
36227     pBlock->aData = (u8 *)&pBlock[1];
36228     addBlockToList(pList, pBlock);
36230     sz = sqlite3MallocSize(pBlock);
36236   for(i=0; pPg==0 && ALWAYS(i<pBlock->nEntry); i++){
36237     if( 0==(pBlock->mUsed & ((Bitmask)1<<i)) ){
36238       pBlock->mUsed |= ((Bitmask)1<<i);
36239       pPg = (void *)&pBlock->aData[pList->nByte * i];
36243   PAGE_SET_BLOCKPTR(pCache, pPg, pBlock);
36246   if( pBlock->mUsed==(((Bitmask)1<<pBlock->nEntry)-1) && pList->pLast!=pBlock ){
36247     assert( pList->pFirst==pBlock );
36248     assert( pBlock->pPrev==0 );
36250     pList->pFirst = pBlock->pNext;
36252     pBlock->pPrev = pList->pLast;
36253     pBlock->pNext = 0;
36254     pList->pLast->pNext = pBlock;
36255     pList->pLast = pBlock;
36294     PGroupBlock *pBlock = PAGE_GET_BLOCKPTR(pCache, pPg);
36295     PGroupBlockList *pList = pBlock->pList;
36296     int i = ((u8 *)pPg - pBlock->aData) / pList->nByte;
36298     assert( pPg==(void *)&pBlock->aData[i*pList->nByte] );
36299     assert( pBlock->mUsed & ((Bitmask)1<<i) );
36300     pBlock->mUsed &= ~((Bitmask)1<<i);
36305     if( pList->pFirst==pBlock ){
36306       pList->pFirst = pBlock->pNext;
36309       pBlock->pPrev->pNext = pBlock->pNext;
36311     if( pList->pLast==pBlock ){
36312       pList->pLast = pBlock->pPrev;
36315       pBlock->pNext->pPrev = pBlock->pPrev;
36318     if( pBlock->mUsed==0 ){
36321       int sz = sqlite3MallocSize(pBlock);
36326       sqlite3_free(pBlock);
36328       addBlockToList(pList, pBlock);
50797   sqlite3 *pBlock = 0;
50824     pBlock = pBt->pWriter->db;
50829         pBlock = pIter->pBtree->db;
50834   if( pBlock ){
50835     sqlite3ConnectionBlocked(p->db, pBlock);