[英]How to pass a function with arguments and stop_condition in jthread?
我正在尝试做这样的事情
#include <iostream>
#include <thread>
#include <chrono>
void doWork(char a, std::stop_token st = {}) {
while (!st.stop_requested()) {
std::cout << a << '\n';
}
}
int main() {
std::jthread t1{doWork, 'A'}, // error
t2{doWork, 'B'}; // error
std::this_thread::sleep_for(std::chrono::milliseconds(50));
}
但它不会在带有-std=c++2a
gcc 主干上编译:
/opt/compiler-explorer/gcc-trunk-20200219/include/c++/10.0.1/thread:537:20: error: static assertion failed: std::thread arguments must be invocable after conversion to rvalues
537 | static_assert(is_invocable_v<decay_t<_Callable>,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
538 | decay_t<_Args>...>,
| ~~~~~~~~~~~~~~~~~~
甚至有可能做这样的事情吗?
我认为这应该是可能的,因为我已经看到了一个与 lambda 类似的例子( 这里):
//...
std::jthread t([&ready, &readyMutex, &readyCV] (std::stop_token st) {
while (!stoken.stop_requested()) {
//...
}
});
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