private static void pcache1Free(ref PgHdr p)
{
if (p == null)
{
return;
}
if (p.CacheAllocated)
{
var pSlot = new PgFreeslot();
MutexEx.Enter(pcache1.mutex);
StatusEx.sqlite3StatusAdd(StatusEx.STATUS.PAGECACHE_USED, -1);
pSlot._PgHdr = p;
pSlot.pNext = pcache1.pFree;
pcache1.pFree = pSlot;
pcache1.nFreeSlot++;
pcache1.bUnderPressure = pcache1.nFreeSlot < pcache1.nReserve;
Debug.Assert(pcache1.nFreeSlot <= pcache1.nSlot);
MutexEx.Leave(pcache1.mutex);
}
else
{
Debug.Assert(SysEx.sqlite3MemdebugHasType(p, SysEx.MEMTYPE.PCACHE));
SysEx.sqlite3MemdebugSetType(p, SysEx.MEMTYPE.HEAP);
var iSize = MallocEx.sqlite3MallocSize(p.Data);
MutexEx.Enter(pcache1.mutex);
StatusEx.sqlite3StatusAdd(StatusEx.STATUS.PAGECACHE_OVERFLOW, -iSize);
MutexEx.Leave(pcache1.mutex);
MallocEx.sqlite3_free(ref p.Data);
}
}