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Cause ShutdownPostgres to do a normal transaction abort during backend

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exit, instead of trying to take shortcuts.  Introduce some additional
shutdown callback routines to eliminate kluges like having ProcKill
be responsible for shutting down the buffer manager.  Ensure that the
order of operations during shutdown is predictable and what you would
expect given the module layering.
This commit is contained in:
Tom Lane
2005-08-08 03:12:16 +00:00
parent 89439b8c4f
commit 7117cd3a77
11 changed files with 119 additions and 100 deletions
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12
src/backend/storage/smgr/smgr.c
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.91 2005/06/20 18:37:01 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.92 2005/08/08 03:12:02 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -136,11 +136,12 @@ static void smgr_internal_unlink(RelFileNode rnode, int which,
/*
* smgrinit(), smgrshutdown() -- Initialize or shut down all storage
* smgrinit(), smgrshutdown() -- Initialize or shut down storage
* managers.
*
* Note: in the normal multiprocess scenario with a postmaster, these are
* called at postmaster start and stop, not per-backend.
* Note: smgrinit is called during backend startup (normal or standalone
* case), *not* during postmaster start. Therefore, any resources created
* here or destroyed in smgrshutdown are backend-local.
*/
void
smgrinit(void)
@@ -162,6 +163,9 @@ smgrinit(void)
on_proc_exit(smgrshutdown, 0);
}
/*
* on_proc_exit hook for smgr cleanup during backend shutdown
*/
static void
smgrshutdown(int code, Datum arg)
{