是否可以创建N个std :: thread对象,每个对象运行一个while循环,直到“任务”列表不为空?
可能看起来像这样:
Schedule sched( N );
schned.add( func1, param1, param2, param3 );
schned.add( func1, param1, param2, param3 );
schned.add( func2, param1 );
schned.add( func3, IntegerParam );
schned.add( func4, StringParam );
sched.start(); // start & join each thread wait until all threads finished
带有函数声明:
bool func1( int, int, int );
bool func2( int );
bool func3( int );
bool func4( std::string );
可变参数的说法有可能吗?
这应该是用非常简单std::bind
和std::function
,只要所有的函数具有相同的返回类型。
在您的Schedule
课程中,您可以只存储一个std::queue<std::function<bool()>>
。然后Schedule::add()
看起来像这样:
template<typename func>
Schedule::add(func f) {
// Appropriate synchronization goes here...
function_queue.push_front(f); // Will work as long as func can be converted to std::function<bool()>
}
然后,您可以添加任务,如下所示:
Shedule sched(N);
// This works with function pointers
sched.add(someFunctionThatTakesNoArgs);
// And function like objects such as those returned by std::bind
sched.add(std::bind(func1, param1, param2, param3));
sched.add(std::bind(func1, param1, param2, param3));
sched.add(std::bind(func2, param1));
// Even member functions
SomeClass foo;
sched.add(std::bind(SomeClass::func3, foo, IntegerParam));
sched.add(std::bind(SomeClass::func4, foo, StringParam));
sched.start();
然后让您的工作线程执行类似的操作:
Schedule::worker() {
// Synchronization left as an exercise for the reader...
while (more_work_to_do) {
std::function<bool()> f(function_queue.pop_back());
f();
}
}
本文收集自互联网,转载请注明来源。
如有侵权,请联系 [email protected] 删除。
我来说两句