author | rubidium |
Sun, 25 May 2008 19:17:03 +0000 | |
changeset 9354 | 845e07db4549 |
parent 9111 | 48ce04029fe4 |
child 9661 | 7bfc9b673b17 |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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/** @file oldpool_func.h Functions related to the old pool. */ |
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#ifndef OLDPOOL_FUNC_H |
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#define OLDPOOL_FUNC_H |
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#include "oldpool.h" |
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/** |
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* Allocate a pool item; possibly allocate a new block in the pool. |
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* @param first the first pool item to start searching |
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* @pre first <= Tpool->GetSize() |
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* @return the allocated pool item (or NULL when the pool is full). |
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*/ |
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template<typename T, typename Tid, OldMemoryPool<T> *Tpool> T *PoolItem<T, Tid, Tpool>::AllocateSafeRaw(uint &first) |
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{ |
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uint last_minus_one = Tpool->GetSize() - 1; |
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for (T *t = Tpool->Get(first); t != NULL; t = (t->index < last_minus_one) ? Tpool->Get(t->index + 1U) : NULL) { |
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if (!t->IsValid()) { |
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first = t->index; |
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Tid index = t->index; |
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memset(t, 0, Tpool->item_size); |
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t->index = index; |
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return t; |
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} |
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} |
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/* Check if we can add a block to the pool */ |
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if (Tpool->AddBlockToPool()) return AllocateRaw(first); |
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return NULL; |
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} |
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/** |
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* Check whether we can allocate an item in this pool. This to prevent the |
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* need to actually construct the object and then destructing it again, |
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* which could be *very* costly. |
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* @return true if and only if at least ONE item can be allocated. |
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*/ |
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template<typename T, typename Tid, OldMemoryPool<T> *Tpool> bool PoolItem<T, Tid, Tpool>::CanAllocateItem() |
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{ |
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uint last_minus_one = Tpool->GetSize() - 1; |
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for (T *t = Tpool->Get(Tpool->first_free_index); t != NULL; t = (t->index < last_minus_one) ? Tpool->Get(t->index + 1U) : NULL) { |
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if (!t->IsValid()) return true; |
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Tpool->first_free_index = t->index; |
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} |
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/* Check if we can add a block to the pool */ |
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if (Tpool->AddBlockToPool()) return CanAllocateItem(); |
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return false; |
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} |
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#endif /* OLDPOOL_FUNC_H */ |