private static void pcache1Free(ref PgHdr p)
{
if (p == null)
return;
if (p.CacheAllocated)
{
var pSlot = new PgFreeslot();
MutexEx.sqlite3_mutex_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.sqlite3_mutex_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.sqlite3_mutex_enter(pcache1.mutex);
StatusEx.sqlite3StatusAdd(StatusEx.STATUS.PAGECACHE_OVERFLOW, -iSize);
MutexEx.sqlite3_mutex_leave(pcache1.mutex);
MallocEx.sqlite3_free(ref p.Data);
}
}
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);
}
}
private static void sqlite3PCacheBufferSetup(object pBuf, int sz, int n)
{
if (pcache1 != null)
{
sz = SysEx.ROUNDDOWN8(sz);
pcache1.szSlot = sz;
pcache1.nSlot = pcache1.nFreeSlot = n;
pcache1.nReserve = n > 90 ? 10 : (n / 10 + 1);
pcache1.pStart = null;
pcache1.pEnd = null;
pcache1.pFree = null;
pcache1.bUnderPressure = false;
PgFreeslot p;
while (n-- > 0)
{
p = new PgFreeslot();
p._PgHdr = new PgHdr();
p.pNext = pcache1.pFree;
pcache1.pFree = p;
}
pcache1.pEnd = pBuf;
}
}
private static void sqlite3PCacheBufferSetup(object pBuf, int sz, int n)
{
if (pcache1 != null)
{
sz = SysEx.ROUNDDOWN8(sz);
pcache1.szSlot = sz;
pcache1.nSlot = pcache1.nFreeSlot = n;
pcache1.nReserve = n > 90 ? 10 : (n / 10 + 1);
pcache1.pStart = null;
pcache1.pEnd = null;
pcache1.pFree = null;
pcache1.bUnderPressure = false;
PgFreeslot p;
while (n-- > 0)
{
p = new PgFreeslot();
p._PgHdr = new PgHdr();
p.pNext = pcache1.pFree;
pcache1.pFree = p;
}
pcache1.pEnd = pBuf;
}
}
