ObjectPool.h

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#ifndef  OBJECT_POOL_H
#define OBJECT_POOL_H
#ifdef __cplusplus
extern "C"{
#endif 
 
#include "IntTypes.h"
 
void* InitObjectPool(int objectSize, int poolInitialSize);
 
void* GetObjectPoolIndex(void* pObjectPool, int* pOutIndex);
 
void FreeObjectPoolIndex(void* pObjectPool, int indexToFree);
 
void* FreeObjectPool(void* pObjectPool);
 
struct ObjectPoolData
{
    i64 objectSize;
    i64 capacity;
    i64 freeObjectsArraySize;
    u64* freeObjectIndicessArray;
};
 
#define OBJECT_POOL(a) a*
#define NEW_OBJECT_POOL(a, size) ((a*)InitObjectPool(sizeof(a),size))
 
#define ObjectPoolCapacity(pObjectPool) ((((struct ObjectPoolData*)pObjectPool) - 1)->capacity)
 
#define OBJ_POOL_BOUNDS_CHECK(handle, rVal, pool)\
{\
    bool bBoundsValid = handle < ObjectPoolCapacity(pool) && handle >= 0;\
    if(!bBoundsValid){\
        printf("function '%s' invalid bounds handle %i", __FUNCTION__, handle);\
        return rVal;\
    }\
}
 
#define OBJ_POOL_BOUNDS_CHECK_NO_RETURN(handle, pool)\
{\
    bool bBoundsValid = handle < ObjectPoolCapacity(pool) && handle >= 0;\
    if(!bBoundsValid){\
        printf("function '%s' invalid bounds handle %i", __FUNCTION__, handle);\
        return;\
    }\
}
 
#define ObjectPoolFreeArraySize(pObjectPool) (((struct ObjectPoolData*)pObjectPool) - 1)->freeObjectsArraySize
 
#ifdef __cplusplus
}
#endif
#endif // ! OBJECT_POOL_H