#ifndef HEADER_BASE_BLOCKMMEMORYPOOL
#define HEADER_BASE_BLOCKMMEMORYPOOL

#include <mutex>
#include <vector>

namespace base {

    // all memory must return memory pool before destory.
    class CBlockMemoryPool {
    public:
        // bulk memory size. everytime add nodes num
        CBlockMemoryPool(const int large_sz, const int add_num);
        ~CBlockMemoryPool();
        
        // for bulk memory. 
        // return one bulk memory node
        void* PoolLargeMalloc();
        void PoolLargeFree(void* &m);

        // return bulk memory list size
        int GetSize();
        // return length of bulk memory
        int GetBlockLength();

        // release half memory
        void ReleaseHalf();
        void Expansion(int num = 0);

    private:
        std::mutex                _large_mutex;
        int                       _number_large_add_nodes; //every time add nodes num
        int                       _large_size;             //bulk memory size
        std::vector<void*>        _free_mem_vec;           //free bulk memory list
    };
}

#endif