C++ (Cpp) pg_queue_signal Examples

Example #1

File: signal.c Project: Epictetus/postgres

/* Signal dispatching thread */
static DWORD WINAPI
pg_signal_dispatch_thread(LPVOID param)
{
	HANDLE		pipe = (HANDLE) param;
	BYTE		sigNum;
	DWORD		bytes;

	if (!ReadFile(pipe, &sigNum, 1, &bytes, NULL))
	{
		/* Client died before sending */
		CloseHandle(pipe);
		return 0;
	}
	if (bytes != 1)
	{
		/* Received <bytes> bytes over signal pipe (should be 1) */
		CloseHandle(pipe);
		return 0;
	}
	WriteFile(pipe, &sigNum, 1, &bytes, NULL);	/* Don't care if it works or
												 * not.. */
	FlushFileBuffers(pipe);
	DisconnectNamedPipe(pipe);
	CloseHandle(pipe);

	pg_queue_signal(sigNum);
	return 0;
}

Example #2

File: signal.c Project: Epictetus/postgres

/* Console control handler will execute on a thread created
   by the OS at the time of invocation */
static BOOL WINAPI
pg_console_handler(DWORD dwCtrlType)
{
	if (dwCtrlType == CTRL_C_EVENT ||
		dwCtrlType == CTRL_BREAK_EVENT ||
		dwCtrlType == CTRL_CLOSE_EVENT ||
		dwCtrlType == CTRL_SHUTDOWN_EVENT)
	{
		pg_queue_signal(SIGINT);
		return TRUE;
	}
	return FALSE;
}

Example #3

File: timer.c Project: a1exsh/postgres

/* Timer management thread */
static DWORD WINAPI
pg_timer_thread(LPVOID param)
{
	DWORD		waittime;

	Assert(param == NULL);

	waittime = INFINITE;

	for (;;)
	{
		int			r;

		r = WaitForSingleObjectEx(timerCommArea.event, waittime, FALSE);
		if (r == WAIT_OBJECT_0)
		{
			/* Event signalled from main thread, change the timer */
			EnterCriticalSection(&timerCommArea.crit_sec);
			if (timerCommArea.value.it_value.tv_sec == 0 &&
				timerCommArea.value.it_value.tv_usec == 0)
				waittime = INFINITE;	/* Cancel the interrupt */
			else
			{
				/* WaitForSingleObjectEx() uses milliseconds, round up */
				waittime = (timerCommArea.value.it_value.tv_usec + 999) / 1000 +
					timerCommArea.value.it_value.tv_sec * 1000;
			}
			ResetEvent(timerCommArea.event);
			LeaveCriticalSection(&timerCommArea.crit_sec);
		}
		else if (r == WAIT_TIMEOUT)
		{
			/* Timeout expired, signal SIGALRM and turn it off */
			pg_queue_signal(SIGALRM);
			waittime = INFINITE;
		}
		else
		{
			/* Should never happen */
			Assert(false);
		}
	}

	return 0;
}