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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _MEM_POOL_H_
#define _MEM_POOL_H_
#include <new>
#include <cstring> // for size_t
#include <vector>
static const size_t MAX_MEM_SIZE = 200;
/**
* Speeds-up for memory-allocation of often allocated/deallocated structs
* or classes, or other memory blocks of equal size.
* You may think of this as something like a very primitive garbage collector.
* Instead of actually freeing memory, it is kept allocated, and is just
* reassigned next time an alloc of the same size is performed.
* The maximum memory held by this class is approximately MAX_MEM_SIZE^2 bytes.
*/
class CMemPool
{
public:
CMemPool();
~CMemPool();
void* Alloc(size_t numBytes);
void Free(void* pnt, size_t numBytes);
private:
static bool UseExternalMemory(size_t numBytes) {
return (numBytes > MAX_MEM_SIZE) || (numBytes < 4);
}
void* nextFree[MAX_MEM_SIZE + 1];
int poolSize[MAX_MEM_SIZE + 1];
std::vector<void *> allocated;
};
extern CMemPool mempool;
#endif // _MEM_POOL_H_
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