Convert the arithmetic for shared memory size calculation from 'int'

to 'Size' (that is, size_t), and install overflow detection checks in it.
This allows us to remove the former arbitrary restrictions on NBuffers
etc.  It won't make any difference in a 32-bit machine, but in a 64-bit
machine you could theoretically have terabytes of shared buffers.
(How efficiently we could manage 'em remains to be seen.)  Similarly,
num_temp_buffers, work_mem, and maintenance_work_mem can be set above
2Gb on a 64-bit machine.  Original patch from Koichi Suzuki, additional
work by moi.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h
index 63090de1cfd..b9c9c5d5be6 100644
--- a/src/include/storage/proc.h
+++ b/src/include/storage/proc.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.80 2005/07/31 17:19:22 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/storage/proc.h,v 1.81 2005/08/20 23:26:34 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -122,7 +122,7 @@ extern int	StatementTimeout;
  * Function Prototypes
  */
 extern int	ProcGlobalSemas(void);
-extern int	ProcGlobalShmemSize(void);
+extern Size ProcGlobalShmemSize(void);
 extern void InitProcGlobal(void);
 extern void InitProcess(void);
 extern void InitDummyProcess(int proctype);