我正在学习Boost线程和Asio(异步输入/输出),并且我写了下面的示例将一些概念放在一起。提升线程和提升Asio
class Worker {
private:
boost::asio::io_service& m_ios;
boost::asio::deadline_timer m_timer;
unsigned m_cycles;
unsigned m_time2wait;
std::string m_threadName;
public:
Worker(boost::asio::io_service& ios,
unsigned cycles, unsigned time2wait, const std::string& name);
~Worker();
void start();
void run();
void stop();
};
Worker::Worker (boost::asio::io_service& ios,
unsigned cycles, unsigned time2wait, const std::string& name)
: m_ios(ios),
m_timer(ios, boost::posix_time::seconds (1)),
m_cycles(cycles),
m_time2wait(time2wait),
m_threadName(name)
{
logMsg(m_threadName, "is starting . . . ");
}
Worker::~Worker()
{
logMsg(m_threadName, "is ending . . . ");
}
void Worker::start()
{
logMsg (m_threadName, "start was called");
m_timer.expires_at (m_timer.expires_at() +
boost::posix_time::seconds (m_time2wait));
m_timer.async_wait (boost::bind (&Worker::run, this));
}
void Worker::stop()
{
}
void Worker::run()
{
if (m_cycles > 0)
{
logMsg (m_threadName, "run # ", m_cycles);
--m_cycles;
m_timer.expires_at (m_timer.expires_at() +
boost::posix_time::seconds(m_time2wait));
m_timer.async_wait(boost::bind(&Worker::run, this));
}
else {
logMsg (m_threadName, "end of cycling");
}
}
void run_threads (boost::asio::io_service& io_srv)
{
Worker worker_1(io_srv, 5, 2, "worker 1");
Worker worker_2(io_srv, 5, 4, "worker 2");
worker_1.start();
worker_2.start();
boost::shared_ptr <boost::thread> worker_Thread_One (
new boost::thread (boost::bind (&boost::asio::io_service::run, &io_srv)));
boost::shared_ptr <boost::thread> worker_Thread_Two (
new boost::thread(boost::bind(&boost::asio::io_service::run, &io_srv)));
worker_Thread_One->join();
worker_Thread_Two->join();
}
int main (int argc, char** argv)
{
boost::asio::io_service ios;
run_threads(ios);
return 0;
}
我试图让一些线程并行工作,每个线程通过一个特定的对象来完成它的工作。这个例子显然似乎工作,但我觉得我错了混合线程和Asio(坏设计)。是否有线程与Asio一起工作的正确方法(一个用于多线程的io_service)?
线程对象和“worker”对象如何“绑定”在一起?我认为他们不是我所愿。例如,如果我实例化两个对象和两个线程,我有预期的输出。如果我实例化了两个对象和一个线程,则程序的输出是相同的。
(该logMsg是一个简单的COUT包装用互斥同步的输出操作)。
当你问一个问题时,尽量保持信息。 – Ankit
代码看起来很理智。我可能会使用system_timer而不是deadline_timer。 deadline_timer会做一堆日历工作,而system_timer只是在“ticks”中工作 – RichardBruce