diff options
Diffstat (limited to 'src/backend/storage/ipc/procsignal.c')
| -rw-r--r-- | src/backend/storage/ipc/procsignal.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/backend/storage/ipc/procsignal.c b/src/backend/storage/ipc/procsignal.c index a6f77c105c2..c4b5d0196b3 100644 --- a/src/backend/storage/ipc/procsignal.c +++ b/src/backend/storage/ipc/procsignal.c @@ -21,6 +21,7 @@ #include "miscadmin.h" #include "storage/latch.h" #include "storage/ipc.h" +#include "storage/proc.h" #include "storage/shmem.h" #include "storage/sinval.h" #include "tcop/tcopprot.h" @@ -57,6 +58,14 @@ typedef struct */ #define NumProcSignalSlots (MaxBackends + NUM_AUXPROCTYPES) +/* + * If this flag is set, the process latch will be set whenever SIGUSR1 + * is received. This is useful when waiting for a signal from the postmaster. + * Spurious wakeups must be expected. Make sure that the flag is cleared + * in the error path. + */ +bool set_latch_on_sigusr1; + static ProcSignalSlot *ProcSignalSlots = NULL; static volatile ProcSignalSlot *MyProcSignalSlot = NULL; @@ -276,6 +285,9 @@ procsignal_sigusr1_handler(SIGNAL_ARGS) if (CheckProcSignal(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN)) RecoveryConflictInterrupt(PROCSIG_RECOVERY_CONFLICT_BUFFERPIN); + if (set_latch_on_sigusr1) + SetLatch(&MyProc->procLatch); + latch_sigusr1_handler(); errno = save_errno; |