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Clean up backend-exit-time cleanup behavior. Use on_shmem_exit callbacks

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to ensure that we have released buffer refcounts and so forth, rather than
putting ad-hoc operations before (some of the calls to) proc_exit.  Add
commentary to discourage future hackers from repeating that mistake.
This commit is contained in:
Tom Lane
2000-12-18 00:44:50 +00:00
parent 8c8ed4f456
commit a626b78c89
14 changed files with 255 additions and 139 deletions
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13
src/backend/storage/lmgr/proc.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.86 2000/12/11 16:35:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.87 2000/12/18 00:44:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -29,7 +29,8 @@
*
* Interface (b):
*
* ProcReleaseLocks -- frees the locks associated with this process,
* ProcReleaseLocks -- frees the locks associated with current transaction
*
* ProcKill -- destroys the shared memory state (and locks)
* associated with the process.
*
@ -47,7 +48,7 @@
* This is so that we can support more backends. (system-wide semaphore
* sets run out pretty fast.) -ay 4/95
*
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.86 2000/12/11 16:35:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.87 2000/12/18 00:44:47 tgl Exp $
*/
#include "postgres.h"
@ -332,7 +333,7 @@ GetOffWaitqueue(PROC *proc)
}
/*
* ProcReleaseLocks() -- release all locks associated with this process
* ProcReleaseLocks() -- release all locks associated with current transaction
*
*/
void
@ -340,7 +341,7 @@ ProcReleaseLocks()
{
if (!MyProc)
return;
LockReleaseAll(1, &MyProc->lockQueue);
LockReleaseAll(DEFAULT_LOCKMETHOD, &MyProc->lockQueue);
GetOffWaitqueue(MyProc);
}
@ -423,8 +424,6 @@ ProcKill(int exitStatus, Datum pid)
* ----------------
*/
GetOffWaitqueue(proc);
return;
}
/*