我试过在这个简单的测试应用程序中使用boost deadline_timer,但遇到了一些麻烦。目标是定时器使用deadline_timer
的expires_at()
成员函数每45毫秒触发一次。 (我需要一个绝对的时间,所以我不考虑expires_from_now()
。我现在也不关心漂移)。当我运行该程序时,wait()
不会等待45毫秒!然而,没有错误报道。我以某种方式错误地使用图书馆?boost deadline_timer不等待
样例程序:
#include <boost/asio.hpp>
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <iostream>
using namespace std;
int main()
{
boost::asio::io_service Service;
boost::shared_ptr<boost::thread> Thread;
boost::asio::io_service::work RunForever(Service);
Thread = boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(&boost::asio::io_service::run, &Service)));
boost::shared_ptr<boost::asio::deadline_timer> Timer(new boost::asio::deadline_timer(Service));
while(1)
{
boost::posix_time::time_duration Duration;
Duration = boost::posix_time::microseconds(45000);
boost::posix_time::ptime Start = boost::posix_time::microsec_clock::local_time();
boost::posix_time::ptime Deadline = Start + Duration;
boost::system::error_code Error;
size_t Result = Timer->expires_at(Deadline, Error);
cout << Result << ' ' << Error << ' ';
Timer->wait(Error);
cout << Error << ' ';
boost::posix_time::ptime End = boost::posix_time::microsec_clock::local_time();
(cout << "Duration = " << (End - Start).total_milliseconds() << " milliseconds" << endl).flush();
}
return 0;
}