C++ Timer::Cancel方法代码示例

void
CCOspApplication::OnBackground(void)
{
    Timer* timer = CCEGLView::sharedOpenGLView()->getTimer();

    if (timer != null)
    {
        timer->Cancel();
    }
}

void MicrosecondTimer::Calibrate()
{
    iCount = 0;

    Expired();
    
    iExpired = false;
    
    while(!iExpired) {
    }
    
    iExpired = false;

    while(!iExpired) {
        iCount++;
    }

    iTimer.Cancel();
}

 /**
  * Destructor.  Discards any pending events.
  */
 ~RateLimiter() {
   Cancel();
 }

int sys_ppoll(struct pollfd* user_fds, size_t nfds,
              const struct timespec* user_timeout_ts,
              const sigset_t* user_sigmask)
{
	ioctx_t ctx; SetupKernelIOCtx(&ctx);

	struct timespec timeout_ts;
	if ( !FetchTimespec(&timeout_ts, user_timeout_ts) )
		return -1;

	if ( user_sigmask )
		return errno = ENOSYS, -1;

	struct pollfd* fds = CopyFdsFromUser(user_fds, nfds);
	if ( !fds ) { return -1; }

	PollNode* nodes = new PollNode[nfds];
	if ( !nodes ) { delete[] fds; return -1; }

	Process* process = CurrentProcess();

	kthread_mutex_t wakeup_mutex = KTHREAD_MUTEX_INITIALIZER;
	kthread_cond_t wakeup_cond = KTHREAD_COND_INITIALIZER;

	kthread_mutex_lock(&wakeup_mutex);

	int ret = -1;
	bool self_woken = false;
	bool remote_woken = false;
	bool unexpected_error = false;

	Timer timer;
	struct poll_timeout pts;
	if ( timespec_le(timespec_make(0, 1), timeout_ts) )
	{
		timer.Attach(Time::GetClock(CLOCK_MONOTONIC));
		struct itimerspec its;
		its.it_interval = timespec_nul();
		its.it_value = timeout_ts;
		pts.wake_mutex = &wakeup_mutex;
		pts.wake_cond = &wakeup_cond;
		pts.woken = &remote_woken;
		timer.Set(&its, NULL, 0, poll_timeout_callback, &pts);
	}

	size_t reqs;
	for ( reqs = 0; !unexpected_error && reqs < nfds; )
	{
		PollNode* node = nodes + reqs;
		if ( fds[reqs].fd < 0 )
		{
			fds[reqs].revents = POLLNVAL;
			// TODO: Should we set POLLNVAL in node->revents too? Should this
			// system call ignore this error and keep polling, or return to
			// user-space immediately? What if conditions are already true on
			// some of the file descriptors (those we have processed so far?)?
			node->revents = 0;
			reqs++;
			continue;
		}
		Ref<Descriptor> desc = process->GetDescriptor(fds[reqs].fd);
		if ( !desc ) { self_woken = unexpected_error = true; break; }
		node->events = fds[reqs].events | POLL__ONLY_REVENTS;
		node->revents = 0;
		node->wake_mutex = &wakeup_mutex;
		node->wake_cond = &wakeup_cond;
		node->woken = &remote_woken;
		reqs++;
		// TODO: How should errors be handled?
		if ( desc->poll(&ctx, node) == 0 )
			self_woken = true;
		else if ( errno == EAGAIN )
			errno = 0;
		else
			unexpected_error = self_woken = true;
	}

	if ( timeout_ts.tv_sec == 0 && timeout_ts.tv_nsec == 0 )
		self_woken = true;

	while ( !(self_woken || remote_woken) )
	{
		if ( !kthread_cond_wait_signal(&wakeup_cond, &wakeup_mutex) )
			errno = -EINTR,
			self_woken = true;
	}

	kthread_mutex_unlock(&wakeup_mutex);

	for ( size_t i = 0; i < reqs; i++ )
		if ( 0 <= fds[i].fd )
			nodes[i].Cancel();

	if ( timespec_le(timespec_make(0, 1), timeout_ts) )
	{
		timer.Cancel();
		timer.Detach();
	}

	if ( !unexpected_error )
//.........这里部分代码省略.........