bool test = false; // 如果是std::atomic<bool> test = false 是否可以
int v;

线程1
while(true)
{
    if (!test)
    {
        v = GetV();
        test = true;
    }
}

线程2
while(true)
{
    if(test)
    {
         UseV(v);
         test = false;
     }
}
--
修改:grainbuds FROM 36.113.96.*
FROM 36.113.96.*