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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.

35{

36 if (ProcSignalBarrierPending)

37 ProcessProcSignalBarrier();

38

39 if (ConfigReloadPending)

40 {

41 ConfigReloadPending = false;

42 ProcessConfigFile(PGC_SIGHUP);

43 }

44

45 if (ShutdownRequestPending)

46 proc_exit(0);

47

48 /* Perform logging of memory contexts of this process */

49 if (LogMemoryContextPending)

50 ProcessLogMemoryContextInterrupt();

51}

LogMemoryContextPending

volatile sig_atomic_t LogMemoryContextPending

Definition: globals.c:41

ProcSignalBarrierPending

volatile sig_atomic_t ProcSignalBarrierPending

Definition: globals.c:40

ProcessConfigFile

void ProcessConfigFile(GucContext context)

Definition: guc-file.l:120

PGC_SIGHUP

@ PGC_SIGHUP

Definition: guc.h:75

ShutdownRequestPending

volatile sig_atomic_t ShutdownRequestPending

Definition: interrupt.c:28

ConfigReloadPending

volatile sig_atomic_t ConfigReloadPending

Definition: interrupt.c:27

proc_exit

void proc_exit(int code)

Definition: ipc.c:104

ProcessLogMemoryContextInterrupt

void ProcessLogMemoryContextInterrupt(void)

Definition: mcxt.c:1337

ProcessProcSignalBarrier

void ProcessProcSignalBarrier(void)

Definition: procsignal.c:499

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

Referenced by BackgroundWriterMain(), and WalWriterMain().

◆ SignalHandlerForConfigReload()

void SignalHandlerForConfigReload ( SIGNAL_ARGS )

Definition at line 61 of file interrupt.c.

62{

63 ConfigReloadPending = true;

64 SetLatch(MyLatch);

65}

MyLatch

struct Latch * MyLatch

Definition: globals.c:63

SetLatch

void SetLatch(Latch *latch)

Definition: latch.c:290

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 73 of file interrupt.c.

74{

75 /*

76 * We DO NOT want to run proc_exit() or atexit() callbacks -- we're here

77 * because shared memory may be corrupted, so we don't want to try to

78 * clean up our transaction. Just nail the windows shut and get out of

79 * town. The callbacks wouldn't be safe to run from a signal handler,

80 * anyway.

81 *

82 * Note we do _exit(2) not _exit(0). This is to force the postmaster into

83 * a system reset cycle if someone sends a manual SIGQUIT to a random

84 * backend. This is necessary precisely because we don't clean up our

85 * shared memory state. (The "dead man switch" mechanism in pmsignal.c

86 * should ensure the postmaster sees this as a crash, too, but no harm in

87 * being doubly sure.)

88 */

89 _exit(2);

90}

Referenced by InitPostmasterChild().

◆ SignalHandlerForShutdownRequest()

void SignalHandlerForShutdownRequest ( SIGNAL_ARGS )

Definition at line 104 of file interrupt.c.

105{

106 ShutdownRequestPending = true;

107 SetLatch(MyLatch);

108}

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(), IoWorkerMain(), 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().