72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef UTILS_POOL_H
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#define UTILS_POOL_H
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#include <utils/TypeHelpers.h>
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namespace android {
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class PoolImpl {
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public:
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PoolImpl(size_t objSize);
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~PoolImpl();
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void* allocImpl();
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void freeImpl(void* obj);
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private:
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size_t mObjSize;
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};
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/*
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* A homogeneous typed memory pool for fixed size objects.
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* Not intended to be thread-safe.
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*/
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template<typename T>
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class Pool : private PoolImpl {
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public:
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/* Creates an initially empty pool. */
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Pool() : PoolImpl(sizeof(T)) { }
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/* Destroys the pool.
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* Assumes that the pool is empty. */
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~Pool() { }
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/* Allocates an object from the pool, growing the pool if needed. */
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inline T* alloc() {
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void* mem = allocImpl();
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if (! traits<T>::has_trivial_ctor) {
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return new (mem) T();
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} else {
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return static_cast<T*>(mem);
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}
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}
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/* Frees an object from the pool. */
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inline void free(T* obj) {
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if (! traits<T>::has_trivial_dtor) {
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obj->~T();
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}
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freeImpl(obj);
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}
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};
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} // namespace android
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#endif // UTILS_POOL_H
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