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Reorder startup ops so that if preallocation of semas fails,
postmaster will release whatever it did get before dying.
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e77b630cf0
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4c31393135
@ -7,7 +7,7 @@
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*
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*
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*
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*
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* IDENTIFICATION
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.19 1999/02/19 06:06:04 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipci.c,v 1.20 1999/02/19 07:10:47 tgl Exp $
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*
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*
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*-------------------------------------------------------------------------
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*-------------------------------------------------------------------------
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*/
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*/
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@ -101,7 +101,6 @@ CreateSharedMemoryAndSemaphores(IPCKey key, int maxBackends)
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* ----------------
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* ----------------
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*/
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*/
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InitProcGlobal(key, maxBackends);
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InitProcGlobal(key, maxBackends);
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on_shmem_exit(ProcFreeAllSemaphores, NULL);
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CreateSharedInvalidationState(key);
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CreateSharedInvalidationState(key);
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}
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}
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@ -7,7 +7,7 @@
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*
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*
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*
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*
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* IDENTIFICATION
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.49 1999/02/19 06:06:08 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.50 1999/02/19 07:10:48 tgl Exp $
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*
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*
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*-------------------------------------------------------------------------
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*-------------------------------------------------------------------------
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*/
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*/
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@ -46,7 +46,7 @@
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* This is so that we can support more backends. (system-wide semaphore
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* This is so that we can support more backends. (system-wide semaphore
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* sets run out pretty fast.) -ay 4/95
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* sets run out pretty fast.) -ay 4/95
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*
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*
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.49 1999/02/19 06:06:08 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.50 1999/02/19 07:10:48 tgl Exp $
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*/
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*/
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#include <sys/time.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <unistd.h>
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@ -79,6 +79,7 @@
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static void HandleDeadLock(int sig);
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static void HandleDeadLock(int sig);
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static PROC *ProcWakeup(PROC *proc, int errType);
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static PROC *ProcWakeup(PROC *proc, int errType);
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static void ProcFreeAllSemaphores(void);
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#define DeadlockCheckTimer pg_options[OPT_DEADLOCKTIMEOUT]
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#define DeadlockCheckTimer pg_options[OPT_DEADLOCKTIMEOUT]
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@ -135,6 +136,8 @@ InitProcGlobal(IPCKey key, int maxBackends)
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/* --------------------
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/* --------------------
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* We're the first - initialize.
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* We're the first - initialize.
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* XXX if found should ever be true, it is a sign of impending doom ...
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* ought to complain if so?
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* --------------------
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* --------------------
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*/
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*/
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if (!found)
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if (!found)
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@ -145,6 +148,12 @@ InitProcGlobal(IPCKey key, int maxBackends)
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ProcGlobal->currKey = IPCGetProcessSemaphoreInitKey(key);
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ProcGlobal->currKey = IPCGetProcessSemaphoreInitKey(key);
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for (i = 0; i < MAX_PROC_SEMS / PROC_NSEMS_PER_SET; i++)
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for (i = 0; i < MAX_PROC_SEMS / PROC_NSEMS_PER_SET; i++)
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ProcGlobal->freeSemMap[i] = 0;
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ProcGlobal->freeSemMap[i] = 0;
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/* Arrange to delete semas on exit --- set this up now so that
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* we will clean up if pre-allocation fails...
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*/
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on_shmem_exit(ProcFreeAllSemaphores, NULL);
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/* Pre-create the semaphores for the first maxBackends processes */
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/* Pre-create the semaphores for the first maxBackends processes */
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for (i = 0;
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for (i = 0;
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i < (maxBackends+PROC_NSEMS_PER_SET-1) / PROC_NSEMS_PER_SET;
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i < (maxBackends+PROC_NSEMS_PER_SET-1) / PROC_NSEMS_PER_SET;
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@ -924,7 +933,7 @@ ProcFreeSem(IpcSemaphoreKey semKey, int semNum)
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* destroying shared state for a failed set of backends.
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* destroying shared state for a failed set of backends.
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* Free up all the semaphores allocated to the lmgrs of the backends.
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* Free up all the semaphores allocated to the lmgrs of the backends.
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*/
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*/
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void
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static void
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ProcFreeAllSemaphores()
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ProcFreeAllSemaphores()
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{
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{
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int i;
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int i;
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@ -6,7 +6,7 @@
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* $Id: proc.h,v 1.19 1999/02/19 06:06:37 tgl Exp $
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* $Id: proc.h,v 1.20 1999/02/19 07:10:47 tgl Exp $
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*
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*
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*-------------------------------------------------------------------------
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*-------------------------------------------------------------------------
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*/
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*/
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@ -122,6 +122,5 @@ extern int ProcLockWakeup(PROC_QUEUE *queue, LOCKMETHOD lockmethod,
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LOCK *lock);
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LOCK *lock);
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extern void ProcAddLock(SHM_QUEUE *elem);
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extern void ProcAddLock(SHM_QUEUE *elem);
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extern void ProcReleaseSpins(PROC *proc);
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extern void ProcReleaseSpins(PROC *proc);
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extern void ProcFreeAllSemaphores(void);
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#endif /* PROC_H */
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#endif /* PROC_H */
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