C++ (Cpp) issue_xlog_fsync Examples

Example #1

File: walreceiver.c Project: HeyMendy/9315ass2

/* Flush the log to disk */
static void
XLogWalRcvFlush(void)
{
	if (XLByteLT(LogstreamResult.Flush, LogstreamResult.Write))
	{
		/* use volatile pointer to prevent code rearrangement */
		volatile WalRcvData *walrcv = WalRcv;

		issue_xlog_fsync(recvFile, recvId, recvSeg);

		LogstreamResult.Flush = LogstreamResult.Write;

		/* Update shared-memory status */
		SpinLockAcquire(&walrcv->mutex);
		walrcv->latestChunkStart = walrcv->receivedUpto;
		walrcv->receivedUpto = LogstreamResult.Flush;
		SpinLockRelease(&walrcv->mutex);

		/* Report XLOG streaming progress in PS display */
		if (update_process_title)
		{
			char		activitymsg[50];

			snprintf(activitymsg, sizeof(activitymsg), "streaming %X/%X",
					 LogstreamResult.Write.xlogid,
					 LogstreamResult.Write.xrecoff);
			set_ps_display(activitymsg, false);
		}
	}
}

Example #2

File: walreceiver.c Project: pguyot/postgres

/*
 * Flush the log to disk.
 *
 * If we're in the midst of dying, it's unwise to do anything that might throw
 * an error, so we skip sending a reply in that case.
 */
static void
XLogWalRcvFlush(bool dying)
{
	if (XLByteLT(LogstreamResult.Flush, LogstreamResult.Write))
	{
		/* use volatile pointer to prevent code rearrangement */
		volatile WalRcvData *walrcv = WalRcv;

		issue_xlog_fsync(recvFile, recvId, recvSeg);

		LogstreamResult.Flush = LogstreamResult.Write;

		/* Update shared-memory status */
		SpinLockAcquire(&walrcv->mutex);
		if (XLByteLT(walrcv->receivedUpto, LogstreamResult.Flush))
		{
			walrcv->latestChunkStart = walrcv->receivedUpto;
			walrcv->receivedUpto = LogstreamResult.Flush;
		}
		SpinLockRelease(&walrcv->mutex);

		/* Signal the startup process and walsender that new WAL has arrived */
		WakeupRecovery();
		if (AllowCascadeReplication())
			WalSndWakeup();

		/* Report XLOG streaming progress in PS display */
		if (update_process_title)
		{
			char		activitymsg[50];

			snprintf(activitymsg, sizeof(activitymsg), "streaming %X/%X",
					 LogstreamResult.Write.xlogid,
					 LogstreamResult.Write.xrecoff);
			set_ps_display(activitymsg, false);
		}

		/* Also let the master know that we made some progress */
		if (!dying)
		{
			XLogWalRcvSendReply();
			XLogWalRcvSendHSFeedback();
		}
	}
}