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A universal thread-safe memory pool

 6 years ago
source link: https://www.tuicool.com/articles/hit/63YRVnJ
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ump

A universal thread-safe memory pool. This simple memory pool can be used if following conditions are satisfied:

(1) The memory sizes are some fixed numbers. E.g, 32 , 64 , 128 , etc, not random;

(2) The allocating memory operation is not so cheap, e.g., CUDA.

Example:

#include <cstdlib>
#include <iostream>
#include "ump.h"

int main()
{
    UMP ump{malloc, free};
    auto p1 = ump.allocate_memory(100);
    std::cout << p1 << std::endl;
    auto p2 = ump.allocate_memory(100);
    std::cout << p2 << std::endl;
    ump.free_memory(p1);
    auto p3 = ump.allocate_memory(100);
    std::cout << p3 << std::endl;
    ump.free_memory(p2);
    ump.free_memory(p3);
    std::cout << ump.get_used_memory() << std::endl;

    return 0;
}

Build and run it:

$ c++ -g -O2 -Wall main.cpp
$ ./a.out
0x55db2b807160
0x55db2b807620
0x55db2b807160
200

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