boost: atomic

_gongluck

发布于 2019-05-25 19:53:57

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发布于 2019-05-25 19:53:57

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Code

#include <iostream>
#include <boost/atomic.hpp>

using namespace std;
using namespace boost;

int main()
{
    atomic<int> a(10);
    assert(a == 10);

    atomic<long> l;
    cout << l << endl;

    atomic<bool> b(false);
    assert(!b.load());
    b.store(true);
    assert(b);//ÒþÊ½load

    atomic<int> n(100);
    assert(n.exchange(200) == 100);
    assert(n == 200);

    atomic<long> ll(100);
    long v = 100;
    bool bres = false;

    bres = ll.compare_exchange_weak(v, 313);//cmpare and swap,返回true,ll==313,v不变
    cout << "bres = " << bres << endl;
    cout << "ll = " << ll.load() << endl;
    cout << "v = " << v << endl;

    v = 200;
    bres = ll.compare_exchange_strong(v, 99);//ll!=v,返回false，v==ll.
    cout << "bres = " << bres << endl;
    cout << "ll = " << ll.load() << endl;
    cout << "v = " << v << endl;

    system("pause");
}