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Allocate a few extra LWLocks for possible use by add-on modules.

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Per request from Marc Munro.
This commit is contained in:
Tom Lane
2005-10-07 20:11:03 +00:00
parent 426d0158ca
commit bb55e583f6
2 changed files with 9 additions and 3 deletions
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5
src/backend/storage/lmgr/lwlock.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.30 2005/09/16 00:30:05 tgl Exp $ * $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.31 2005/10/07 20:11:03 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -140,7 +140,8 @@ NumLWLocks(void)
*/ */
numLocks += 2 * NUM_SLRU_BUFFERS; numLocks += 2 * NUM_SLRU_BUFFERS;
/* Perhaps create a few more for use by user-defined modules? */ /* Leave a few extra for use by user-defined modules. */
numLocks += NUM_USER_DEFINED_LWLOCKS;
return numLocks; return numLocks;
} }

7
src/include/pg_config_manual.h
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@ -6,7 +6,7 @@
* for developers. If you edit any of these, be sure to do a *full* * for developers. If you edit any of these, be sure to do a *full*
* rebuild (and an initdb if noted). * rebuild (and an initdb if noted).
* *
* $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.17 2005/10/03 22:55:56 tgl Exp $ * $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.18 2005/10/07 20:11:03 tgl Exp $
*------------------------------------------------------------------------ *------------------------------------------------------------------------
*/ */
@ -74,6 +74,11 @@
*/ */
#define INDEX_MAX_KEYS 32 #define INDEX_MAX_KEYS 32
/*
* Number of spare LWLocks to allocate for user-defined add-on code.
*/
#define NUM_USER_DEFINED_LWLOCKS 4
/* /*
* Define this to make libpgtcl's "pg_result -assign" command process * Define this to make libpgtcl's "pg_result -assign" command process
* C-style backslash sequences in returned tuple data and convert * C-style backslash sequences in returned tuple data and convert