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

tglsfdc · tglsfdc · commit bb55e583f646 · 2005-10-07T20:11:03.000Z
Per request from Marc Munro.
diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c
@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * 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;
 
-	/* 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;
 }
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h
@@ -6,7 +6,7 @@
  * for developers.	If you edit any of these, be sure to do a *full*
  * 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
 
+/*
+ * 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
  * C-style backslash sequences in returned tuple data and convert

Original file line number	Diff line number	Diff line change
`@@ -15,7 +15,7 @@`
`15`	`15`	`* Portions Copyright (c) 1994, Regents of the University of California`
`16`	`16`	`*`
`17`	`17`	`* IDENTIFICATION`
`18`		`- * $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.30 2005/09/16 00:30:05 tgl Exp $`
	`18`	`+ * $PostgreSQL: pgsql/src/backend/storage/lmgr/lwlock.c,v 1.31 2005/10/07 20:11:03 tgl Exp $`
`19`	`19`	`*`
`20`	`20`	`*-------------------------------------------------------------------------`
`21`	`21`	`*/`
`@@ -140,7 +140,8 @@ NumLWLocks(void)`
`140`	`140`	`*/`
`141`	`141`	`numLocks += 2 * NUM_SLRU_BUFFERS;`
`142`	`142`
`143`		`- /* Perhaps create a few more for use by user-defined modules? */`
	`143`	`+ /* Leave a few extra for use by user-defined modules. */`
	`144`	`+ numLocks += NUM_USER_DEFINED_LWLOCKS;`
`144`	`145`
`145`	`146`	`return numLocks;`
`146`	`147`	`}`