From 9acb85597f1223ac26a5b19a9345849c43d0ff54 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Thu, 16 Feb 2017 12:45:53 -0500
Subject: [PATCH] Add new function dsa_allocate0.
This does the same thing as dsa_allocate, except that the memory
is guaranteed to be zero-filled on return.
Dilip Kumar, adjusted by me.
---
src/backend/utils/mmgr/dsa.c | 16 ++++++++++++++++
src/include/utils/dsa.h | 1 +
2 files changed, 17 insertions(+)
diff --git a/src/backend/utils/mmgr/dsa.c b/src/backend/utils/mmgr/dsa.c
index 7dc43f1ea79..3eb3d4d9a4e 100644
--- a/src/backend/utils/mmgr/dsa.c
+++ b/src/backend/utils/mmgr/dsa.c
@@ -755,6 +755,22 @@ dsa_allocate(dsa_area *area, Size size)
return alloc_object(area, size_class);
}
+/*
+ * As dsa_allocate, but zeroes the allocated memory.
+ */
+dsa_pointer
+dsa_allocate0(dsa_area *area, Size size)
+{
+ dsa_pointer dp;
+ char *object;
+
+ dp = dsa_allocate(area, size);
+ object = dsa_get_address(area, dp);
+ memset(object, 0, size);
+
+ return dp;
+}
+
/*
* Free memory obtained with dsa_allocate.
*/
diff --git a/src/include/utils/dsa.h b/src/include/utils/dsa.h
index bb634e77cda..3fd9bbd3a50 100644
--- a/src/include/utils/dsa.h
+++ b/src/include/utils/dsa.h
@@ -106,6 +106,7 @@ extern void dsa_set_size_limit(dsa_area *area, Size limit);
extern Size dsa_minimum_size(void);
extern dsa_handle dsa_get_handle(dsa_area *area);
extern dsa_pointer dsa_allocate(dsa_area *area, Size size);
+extern dsa_pointer dsa_allocate0(dsa_area *area, Size size);
extern void dsa_free(dsa_area *area, dsa_pointer dp);
extern void *dsa_get_address(dsa_area *area, dsa_pointer dp);
extern void dsa_trim(dsa_area *area);
--
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