status_t
LargeMemoryPhysicalPageMapper::GetSlot(bool canWait, PhysicalPageSlot*& slot)
{
MutexLocker locker(fLock);
PhysicalPageSlotPool* pool = fNonEmptyPools.Head();
if (pool == NULL) {
if (!canWait)
return B_WOULD_BLOCK;
// allocate new pool
locker.Unlock();
status_t error = fInitialPool->AllocatePool(pool);
if (error != B_OK)
return error;
locker.Lock();
fNonEmptyPools.Add(pool);
pool = fNonEmptyPools.Head();
}
slot = pool->GetSlot();
if (pool->IsEmpty()) {
fNonEmptyPools.Remove(pool);
fEmptyPools.Add(pool);
}
return B_OK;
}
void
LargeMemoryPhysicalPageMapper::PutSlot(PhysicalPageSlot* slot)
{
MutexLocker locker(fLock);
PhysicalPageSlotPool* pool = slot->pool;
if (pool->IsEmpty()) {
fEmptyPools.Remove(pool);
fNonEmptyPools.Add(pool);
}
pool->PutSlot(slot);
}