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Continued rearrangement to permit pgstat + BootstrapMain processes to be

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fork/exec'd, in the same mode as the previous patch for backends.

Claudio Natoli
This commit is contained in:
Bruce Momjian
2003-12-25 03:52:51 +00:00
parent 3e32e9476f
commit aeddc2a60d
7 changed files with 345 additions and 159 deletions
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39
src/backend/storage/lmgr/proc.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.142 2003/12/21 00:33:33 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/lmgr/proc.c,v 1.143 2003/12/25 03:52:51 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -122,20 +122,31 @@ ProcGlobalSemas(int maxBackends)
void
InitProcGlobal(int maxBackends)
{
bool found = false;
bool foundProcGlobal, foundDummy;
/* Create or attach to the ProcGlobal shared structure */
ProcGlobal = (PROC_HDR *)
ShmemInitStruct("Proc Header", sizeof(PROC_HDR), &found);
ShmemInitStruct("Proc Header", sizeof(PROC_HDR), &foundProcGlobal);
/* --------------------
* We're the first - initialize.
* XXX if found should ever be true, it is a sign of impending doom ...
* ought to complain if so?
* --------------------
/*
* Create or attach to the PGPROC structures for dummy (checkpoint)
* processes, too. This does not get linked into the freeProcs
* list.
*/
if (!found)
DummyProc = (PGPROC *)
ShmemInitStruct("DummyProc",sizeof(PGPROC) * NUM_DUMMY_PROCS, &foundDummy);
if (foundProcGlobal || foundDummy)
{
/* both should be present or neither */
Assert(foundProcGlobal && foundDummy);
return;
}
else
{
/*
* We're the first - initialize.
*/
int i;
ProcGlobal->freeProcs = INVALID_OFFSET;
@@ -159,16 +170,6 @@ InitProcGlobal(int maxBackends)
ProcGlobal->freeProcs = MAKE_OFFSET(proc);
}
/*
* Pre-allocate a PGPROC structure for dummy (checkpoint)
* processes, too. This does not get linked into the freeProcs
* list.
*/
DummyProc = (PGPROC *) ShmemAlloc(sizeof(PGPROC) * NUM_DUMMY_PROCS);
if (!DummyProc)
ereport(FATAL,
(errcode(ERRCODE_OUT_OF_MEMORY),
errmsg("out of shared memory")));
MemSet(DummyProc, 0, sizeof(PGPROC) * NUM_DUMMY_PROCS);
for (i = 0; i < NUM_DUMMY_PROCS; i++)
{