std::thread::hardware_concurrency

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< cpp‎ | thread‎ | thread
 
 
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static unsigned int hardware_concurrency() noexcept;
(C++11 起)

返回实现所支持的并发线程数。应该只把值当做提示。

目录

[编辑] 参数

(无)

[编辑] 返回值

支持的并发线程数。若值非良定义或不可计算,则返回 0

[编辑] 示例

#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.

[编辑] 参阅

避免假共享的最小偏移
促使真共享的最大偏移
(常量) [编辑]