#ifndef _DEMEMPOOL_HPP
#define _DEMEMPOOL_HPP
/*-------------------------------------------------------------------------
 * drawElements C++ Base Library
 * -----------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Memory pool (deMemPool wrapper).
 *//*--------------------------------------------------------------------*/

#include "deDefs.hpp"
#include "deMemPool.h"

#include <new>

namespace de
{

/*--------------------------------------------------------------------*//*!
 * \brief Memory pool
 *//*--------------------------------------------------------------------*/
class MemPool
{
public:
    MemPool(const deMemPoolUtil *util = DE_NULL, uint32_t flags = 0u);
    MemPool(MemPool *parent);
    ~MemPool(void);

    deMemPool *getRawPool(void)
    {
        return m_pool;
    }

    int getNumChildren(void) const
    {
        return deMemPool_getNumChildren(m_pool);
    }

    uintptr_t getNumAllocatedBytes(bool recurse) const
    {
        return deMemPool_getNumAllocatedBytes(m_pool, recurse ? true : false);
    }
    uintptr_t getCapacity(bool recurse) const
    {
        return deMemPool_getCapacity(m_pool, recurse ? true : false);
    }

    void *alloc(uintptr_t numBytes);
    void *alignedAlloc(uintptr_t numBytes, uint32_t alignBytes);

private:
    MemPool(const MemPool &other);            // Not allowed!
    MemPool &operator=(const MemPool &other); // Not allowed!

    deMemPool *m_pool;
};

// MemPool utils.

char *copyToPool(de::MemPool *pool, const char *string);

// MemPool inline implementations.

inline MemPool::MemPool(const deMemPoolUtil *util, uint32_t flags)
{
    m_pool = deMemPool_createRoot(util, flags);
    if (!m_pool)
        throw std::bad_alloc();
}

inline MemPool::MemPool(MemPool *parent)
{
    m_pool = deMemPool_create(parent->m_pool);
    if (!m_pool)
        throw std::bad_alloc();
}

inline MemPool::~MemPool(void)
{
    deMemPool_destroy(m_pool);
}

inline void *MemPool::alloc(uintptr_t numBytes)
{
    // \todo [2013-02-07 pyry] Use uintptr_t in deMemPool.
    DE_ASSERT((uintptr_t)(int)numBytes == numBytes);
    void *ptr = deMemPool_alloc(m_pool, (int)numBytes);
    if (!ptr)
        throw std::bad_alloc();
    return ptr;
}

inline void *MemPool::alignedAlloc(uintptr_t numBytes, uint32_t alignBytes)
{
    // \todo [2013-02-07 pyry] Use uintptr_t in deMemPool.
    DE_ASSERT((uintptr_t)(int)numBytes == numBytes);
    void *ptr = deMemPool_alignedAlloc(m_pool, (int)numBytes, alignBytes);
    if (!ptr)
        throw std::bad_alloc();
    return ptr;
}

} // namespace de

#endif // _DEMEMPOOL_HPP