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86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
#ifndef MXMEMORYPOOL_H
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#define MXMEMORYPOOL_H
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#include "decomp.h"
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#include "mxbitset.h"
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#include "mxtypes.h"
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#include <assert.h>
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template <size_t BS, size_t NB>
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class MxMemoryPool {
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public:
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MxMemoryPool() : m_pool(NULL), m_blockSize(BS) {}
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~MxMemoryPool() { delete[] m_pool; }
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MxResult Allocate();
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MxU8* Get();
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void Release(MxU8*);
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MxU32 GetPoolSize() const { return m_blockRef.Size(); }
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private:
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MxU8* m_pool; // 0x00
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MxU32 m_blockSize; // 0x04
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MxBitset<NB> m_blockRef; // 0x08
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};
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template <size_t BS, size_t NB>
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MxResult MxMemoryPool<BS, NB>::Allocate()
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{
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assert(m_pool == NULL);
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assert(m_blockSize);
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assert(m_blockRef.Size());
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m_pool = new MxU8[GetPoolSize() * m_blockSize * 1024];
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assert(m_pool);
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return m_pool ? SUCCESS : FAILURE;
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}
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template <size_t BS, size_t NB>
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MxU8* MxMemoryPool<BS, NB>::Get()
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{
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assert(m_pool != NULL);
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assert(m_blockSize);
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assert(m_blockRef.Size());
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for (MxU32 i = 0; i < GetPoolSize(); i++) {
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if (!m_blockRef[i]) {
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m_blockRef[i].Flip();
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#ifdef _DEBUG
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// TODO: This is actually some debug print function, but
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// we just need any func with variatic args to eliminate diff noise.
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printf("Get> %d pool: busy %d blocks\n", m_blockSize, m_blockRef.Count());
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#endif
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return &m_pool[i * m_blockSize * 1024];
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}
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}
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return NULL;
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}
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template <size_t BS, size_t NB>
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void MxMemoryPool<BS, NB>::Release(MxU8* p_buf)
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{
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assert(m_pool != NULL);
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assert(m_blockSize);
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assert(m_blockRef.Size());
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MxU32 i = (MxU32) (p_buf - m_pool) / (m_blockSize * 1024);
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assert(i >= 0 && i < GetPoolSize());
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assert(m_blockRef[i]);
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if (m_blockRef[i]) {
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m_blockRef[i].Flip();
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}
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#ifdef _DEBUG
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printf("Release> %d pool: busy %d blocks\n", m_blockSize, m_blockRef.Count());
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#endif
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}
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#endif // MXMEMORYPOOL_H
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