#include <signal.h>

Include dependency graph for interrupt.h:

This graph shows which files directly or indirectly include this file:

Functions
void	HandleMainLoopInterrupts (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

◆ HandleMainLoopInterrupts()

void HandleMainLoopInterrupts ( 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();
 }

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

Referenced by BackgroundWriterMain().

◆ SignalHandlerForConfigReload()

void SignalHandlerForConfigReload ( SIGNAL_ARGS )

Definition at line 61 of file interrupt.c.

 {
     int         save_errno = errno;
  
     ConfigReloadPending = true;
     SetLatch(MyLatch);
  
     errno = save_errno;
 }

References ConfigReloadPending, MyLatch, and SetLatch().

Referenced by ApplyLauncherMain(), ApplyWorkerMain(), autoprewarm_main(), AutoVacLauncherMain(), AutoVacWorkerMain(), BackgroundWriterMain(), CheckpointerMain(), ParallelApplyWorkerMain(), PgArchiverMain(), PostgresMain(), SysLoggerMain(), WalReceiverMain(), WalSndSignals(), 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.

 {
     int         save_errno = errno;
  
     ShutdownRequestPending = true;
     SetLatch(MyLatch);
  
     errno = save_errno;
 }

References MyLatch, SetLatch(), and ShutdownRequestPending.

Referenced by autoprewarm_main(), AutoVacLauncherMain(), BackgroundWriterMain(), CheckpointerMain(), ParallelApplyWorkerMain(), PgArchiverMain(), WalReceiverMain(), and WalWriterMain().

Variable Documentation

◆ ConfigReloadPending

PGDLLIMPORT volatile sig_atomic_t ConfigReloadPending

extern

◆ ShutdownRequestPending

PGDLLIMPORT volatile sig_atomic_t ShutdownRequestPending

extern

Definition at line 28 of file interrupt.c.

Referenced by apw_load_buffers(), autoprewarm_main(), AutoVacLauncherMain(), CheckpointWriteDelay(), HandleAutoVacLauncherInterrupts(), HandleCheckpointerInterrupts(), HandleMainLoopInterrupts(), HandleWalWriterInterrupts(), pgarch_ArchiverCopyLoop(), pgarch_MainLoop(), ProcessParallelApplyInterrupts(), ProcessWalRcvInterrupts(), and SignalHandlerForShutdownRequest().

Functions

Variables