/* 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);
/* Signal the startup process that new WAL has arrived */
WakeupRecovery();
/* 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);
}
}
}
/* SIGHUP: set flag to re-read config file at next convenient time */
static void
StartupProcSigHupHandler(SIGNAL_ARGS)
{
int save_errno = errno;
got_SIGHUP = true;
WakeupRecovery();
errno = save_errno;
}
/* SIGUSR2: set flag to finish recovery */
static void
StartupProcTriggerHandler(SIGNAL_ARGS)
{
int save_errno = errno;
promote_triggered = true;
WakeupRecovery();
errno = save_errno;
}
/* SIGTERM: set flag to abort redo and exit */
static void
StartupProcShutdownHandler(SIGNAL_ARGS)
{
int save_errno = errno;
if (in_restore_command)
proc_exit(1);
else
shutdown_requested = true;
WakeupRecovery();
errno = save_errno;
}
/*
* 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();
}
}
}
