std::thread::hardware_concurrency
来自cppreference.com
static unsigned int hardware_concurrency() noexcept; |
(C++11 起) | |
返回实现支持的并发线程数。应该只把该值当做提示。
参数
(无)
返回值
支持的并发线程数。若该值非良定义或不可计算,则返回 0 。
示例
运行此代码
#include <iostream> #include <thread> int main() { unsigned int n = std::thread::hardware_concurrency(); std::cout << n << " concurrent threads are supported.\n"; }
可能的输出:
4 concurrent threads are supported.
参阅
避免假共享的最小偏移 促使真共享的最大偏移 (常量) |