private static void pcache1EnforceMaxPage(PGroup pGroup)
{
Debug.Assert(MutexEx.Held(pGroup.mutex));
while (pGroup.nCurrentPage > pGroup.nMaxPage && pGroup.pLruTail != null)
{
PgHdr1 p = pGroup.pLruTail;
Debug.Assert(p.pCache.pGroup == pGroup);
pcache1PinPage(p);
pcache1RemoveFromHash(p);
pcache1FreePage(ref p);
}
}
private static void pcache1EnforceMaxPage(PGroup pGroup)
{
Debug.Assert(MutexEx.Held(pGroup.mutex));
while (pGroup.nCurrentPage > pGroup.nMaxPage && pGroup.pLruTail != null)
{
PgHdr1 p = pGroup.pLruTail;
Debug.Assert(p.pCache.pGroup == pGroup);
pcache1PinPage(p);
pcache1RemoveFromHash(p);
pcache1FreePage(ref p);
}
}
public static void xDestroy(ref IPCache pCache)
{
PGroup pGroup = pCache.pGroup;
Debug.Assert(pCache.bPurgeable || (pCache.nMax == 0 && pCache.nMin == 0));
pcache1EnterMutex(pGroup);
pCache.pcache1TruncateUnsafe(0);
pGroup.nMaxPage -= pCache.nMax;
pGroup.nMinPage -= pCache.nMin;
pGroup.mxPinned = pGroup.nMaxPage + 10 - pGroup.nMinPage;
pcache1EnforceMaxPage(pGroup);
pcache1LeaveMutex(pGroup);
pCache = null;
}
private static void pcache1LeaveMutex(PGroup X)
{
MutexEx.sqlite3_mutex_leave(X.mutex);
}
private static void pcache1EnterMutex(PGroup X)
{
MutexEx.sqlite3_mutex_enter(X.mutex);
}
private static void pcache1LeaveMutex(PGroup X)
{
MutexEx.Leave(X.mutex);
}
private static void pcache1EnterMutex(PGroup X)
{
MutexEx.Enter(X.mutex);
}
private static void pcache1LeaveMutex(PGroup X)
{
MutexEx.sqlite3_mutex_leave(X.mutex);
}
private static void pcache1EnterMutex(PGroup X)
{
MutexEx.sqlite3_mutex_enter(X.mutex);
}