From 6a7bb0afbcab1ac3f1e9bbcb536bc7865f4503e6 Mon Sep 17 00:00:00 2001
From: Bruce Momjian
Date: Fri, 11 Oct 2002 04:12:14 +0000
Subject: Prevent tv_sec from becoming negative in connection timeout code.

---
 src/include/nodes/nodes.h  | 25 +++++++++++++++++++------
 src/include/utils/palloc.h |  5 ++++-
 2 files changed, 23 insertions(+), 7 deletions(-)

(limited to 'src/include')

diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h
index ee472203e68..4b6a3c04eb5 100644
--- a/src/include/nodes/nodes.h
+++ b/src/include/nodes/nodes.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: nodes.h,v 1.118 2002/08/31 22:10:47 tgl Exp $
+ * $Id: nodes.h,v 1.119 2002/10/11 04:12:14 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -261,6 +261,24 @@ typedef struct Node
 
 #define nodeTag(nodeptr)		(((Node*)(nodeptr))->type)
 
+/*
+ *	There is no way to dereference the palloc'ed pointer to assign the
+ *	tag, and return the pointer itself, so we need a holder variable.
+ *	Fortunately, this function isn't recursive so we just define
+ *	a global variable for this purpose.
+ */
+extern Node *newNodeMacroHolder;
+
+#define newNode(size, tag) \
+( \
+	AssertMacro((size) >= sizeof(Node)),		/* need the tag, at least */ \
+\
+	newNodeMacroHolder = (Node *) palloc0(size), \
+	newNodeMacroHolder->type = (tag), \
+	newNodeMacroHolder \
+)
+
+
 #define makeNode(_type_)		((_type_ *) newNode(sizeof(_type_),T_##_type_))
 #define NodeSetTag(nodeptr,t)	(((Node*)(nodeptr))->type = (t))
 
@@ -282,11 +300,6 @@ typedef struct Node
  * ----------------------------------------------------------------
  */
 
-/*
- * nodes/nodes.c
- */
-extern Node *newNode(Size size, NodeTag tag);
-
 /*
  * nodes/{outfuncs.c,print.c}
  */
diff --git a/src/include/utils/palloc.h b/src/include/utils/palloc.h
index 168ed301977..c1cb6f69c42 100644
--- a/src/include/utils/palloc.h
+++ b/src/include/utils/palloc.h
@@ -21,7 +21,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: palloc.h,v 1.19 2002/06/20 20:29:53 momjian Exp $
+ * $Id: palloc.h,v 1.20 2002/10/11 04:12:14 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -46,9 +46,12 @@ extern DLLIMPORT MemoryContext CurrentMemoryContext;
  * Fundamental memory-allocation operations (more are in utils/memutils.h)
  */
 extern void *MemoryContextAlloc(MemoryContext context, Size size);
+extern void *MemoryContextAllocZero(MemoryContext context, Size size);
 
 #define palloc(sz)	MemoryContextAlloc(CurrentMemoryContext, (sz))
 
+#define palloc0(sz)	MemoryContextAllocZero(CurrentMemoryContext, (sz))
+
 extern void pfree(void *pointer);
 
 extern void *repalloc(void *pointer, Size size);
-- 
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