boost::asio的timer.cancel()结束不了计时器

2013-11-13 02:36:01 1.6k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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Boost 计时器定时器速记计时器 boost.Timer接口 elapsed() 报告当前跑了多久了。结果包括： struct cpu_times { nanosecond_type wall; nanosecond_type user; nanosecond_type system; void clear() { wall = user = system = 0LL; } } 阅读详情

今天写程序时，把两个boost::asio的timer包在一个类中，第一个timer每1秒做一件事，第二个timer在一定时间后结束第一个timer，结果发现结束不了。请问怎么回事。
试例代码如下：

#include <boost/asio.hpp>

#include <boost/shared_ptr.hpp>

#include <boost/bind.hpp>



struct STest

{

	STest(boost::asio::io_service& io_server):

	m_timer1(io_server),

	m_timer2(io_server)

	{}



	boost::asio::deadline_timer m_timer1;

	boost::asio::deadline_timer m_timer2;

};



void TimerHandler1(boost::shared_ptr<STest> pTest, const boost::system::error_code& error)

{

	if(!error)

	{

		pTest->m_timer1.expires_from_now(boost::posix_time::seconds(1));

		pTest->m_timer1.async_wait(boost::bind(&TimerHandler1, pTest, boost::asio::placeholders::error));

	}

}



void TimerHandler2(boost::shared_ptr<STest> pTest, const boost::system::error_code& error)

{

	if(!error)

		pTest->m_timer1.cancel();

}



int main()

{

	boost::asio::io_service io_Server;

	boost::shared_ptr<STest> pTest(new STest(io_Server));

	pTest->m_timer1.expires_from_now(boost::posix_time::seconds(1));

	pTest->m_timer1.async_wait(boost::bind(&TimerHandler1, pTest, boost::asio::placeholders::error));

	pTest->m_timer2.expires_from_now(boost::posix_time::seconds(2));

	pTest->m_timer2.async_wait(boost::bind(&TimerHandler2, pTest, boost::asio::placeholders::error));

	io_Server.run();



	std::cout << "end" << std::endl;

	return 0;

}