interrupt.h File Reference

#include <signal.h>

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Functions
void	ProcessMainLoopInterrupts (void)
void	SignalHandlerForConfigReload (SIGNAL_ARGS)
void	SignalHandlerForCrashExit (SIGNAL_ARGS)
void	SignalHandlerForShutdownRequest (SIGNAL_ARGS)

Variables
PGDLLIMPORT volatile sig_atomic_t	ConfigReloadPending
PGDLLIMPORT volatile sig_atomic_t	ShutdownRequestPending

Function Documentation

ProcessMainLoopInterrupts()

void ProcessMainLoopInterrupts

(

void

)

Definition at line 34 of file interrupt.c.

{
    if (ProcSignalBarrierPending)
        ProcessProcSignalBarrier();
 
    if (ConfigReloadPending)
    {
        ConfigReloadPending = false;
        ProcessConfigFile(PGC_SIGHUP);
    }
 
    if (ShutdownRequestPending)
        proc_exit(0);
 
    /* Perform logging of memory contexts of this process */
    if (LogMemoryContextPending)
        ProcessLogMemoryContextInterrupt();
 
    /* Publish memory contexts of this process */
    if (PublishMemoryContextPending)
        ProcessGetMemoryContextInterrupt();
}

References ConfigReloadPending, LogMemoryContextPending, PGC_SIGHUP, proc_exit(), ProcessConfigFile(), ProcessGetMemoryContextInterrupt(), ProcessLogMemoryContextInterrupt(), ProcessProcSignalBarrier(), ProcSignalBarrierPending, PublishMemoryContextPending, and ShutdownRequestPending.

Referenced by BackgroundWriterMain(), and WalWriterMain().

SignalHandlerForConfigReload()

void SignalHandlerForConfigReload

(

SIGNAL_ARGS

)

Definition at line 65 of file interrupt.c.

{
    ConfigReloadPending = true;
    SetLatch(MyLatch);
}

References ConfigReloadPending, MyLatch, and SetLatch().

Referenced by ApplyLauncherMain(), autoprewarm_main(), AutoVacLauncherMain(), AutoVacWorkerMain(), BackgroundWriterMain(), CheckpointerMain(), IoWorkerMain(), ParallelApplyWorkerMain(), PgArchiverMain(), PostgresMain(), ReplSlotSyncWorkerMain(), SetupApplyOrSyncWorker(), SysLoggerMain(), WalReceiverMain(), WalSndSignals(), WalSummarizerMain(), WalWriterMain(), and worker_spi_main().

SignalHandlerForCrashExit()

void SignalHandlerForCrashExit

(

SIGNAL_ARGS

)

Definition at line 77 of file interrupt.c.

{
    /*
     * We DO NOT want to run proc_exit() or atexit() callbacks -- we're here
     * because shared memory may be corrupted, so we don't want to try to
     * clean up our transaction.  Just nail the windows shut and get out of
     * town.  The callbacks wouldn't be safe to run from a signal handler,
     * anyway.
     *
     * Note we do _exit(2) not _exit(0).  This is to force the postmaster into
     * a system reset cycle if someone sends a manual SIGQUIT to a random
     * backend.  This is necessary precisely because we don't clean up our
     * shared memory state.  (The "dead man switch" mechanism in pmsignal.c
     * should ensure the postmaster sees this as a crash, too, but no harm in
     * being doubly sure.)
     */
    _exit(2);
}

Referenced by InitPostmasterChild().

SignalHandlerForShutdownRequest()

void SignalHandlerForShutdownRequest

(

SIGNAL_ARGS

)

Definition at line 109 of file interrupt.c.

{
    ShutdownRequestPending = true;
    SetLatch(MyLatch);
}

References MyLatch, SetLatch(), and ShutdownRequestPending.

Referenced by autoprewarm_main(), AutoVacLauncherMain(), BackgroundWriterMain(), CheckpointerMain(), IoWorkerMain(), ParallelApplyWorkerMain(), PgArchiverMain(), ReplSlotSyncWorkerMain(), WalSummarizerMain(), and WalWriterMain().

Variable Documentation

ConfigReloadPending

PGDLLIMPORT volatile sig_atomic_t ConfigReloadPending

extern

Definition at line 27 of file interrupt.c.

Referenced by ApplyLauncherMain(), autoprewarm_main(), CheckpointWriteDelay(), do_autovacuum(), LogicalRepApplyLoop(), PostgresMain(), ProcessAutoVacLauncherInterrupts(), ProcessCheckpointerInterrupts(), ProcessMainLoopInterrupts(), ProcessParallelApplyInterrupts(), ProcessPendingWrites(), ProcessPgArchInterrupts(), ProcessSlotSyncInterrupts(), ProcessWalSummarizerInterrupts(), SignalHandlerForConfigReload(), slotsync_reread_config(), SysLoggerMain(), vacuum_delay_point(), WaitForStandbyConfirmation(), WalReceiverMain(), WalSndLoop(), WalSndWaitForWal(), and worker_spi_main().

ShutdownRequestPending

PGDLLIMPORT volatile sig_atomic_t ShutdownRequestPending

extern

Definition at line 28 of file interrupt.c.

Referenced by apw_load_buffers(), autoprewarm_main(), AutoVacLauncherMain(), CheckpointerMain(), CheckpointWriteDelay(), IoWorkerMain(), pgarch_ArchiverCopyLoop(), pgarch_MainLoop(), ProcessAutoVacLauncherInterrupts(), ProcessMainLoopInterrupts(), ProcessParallelApplyInterrupts(), ProcessSlotSyncInterrupts(), ProcessWalSummarizerInterrupts(), and SignalHandlerForShutdownRequest().