From 0c6fc51909e53bb89558858438a0267fcc44fea1 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Thu, 13 Mar 2008 18:11:33 +0000
Subject:  r18793@catbus:  nickm | 2008-03-13 14:09:19 -0400  Add a
 malloc_good_size() implementation to OpenBSD_malloc_Linux.c.  Also, make
 configure.in not use support functions for the platform malloc when we are
 not using the platform mallocs.

svn:r14010
---
 src/common/OpenBSD_malloc_Linux.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src')

diff --git a/src/common/OpenBSD_malloc_Linux.c b/src/common/OpenBSD_malloc_Linux.c
index 59c2c7def..da240c8e7 100644
--- a/src/common/OpenBSD_malloc_Linux.c
+++ b/src/common/OpenBSD_malloc_Linux.c
@@ -1998,3 +1998,21 @@ void *valloc(size_t size)
 	posix_memalign(&r, malloc_pagesize, size);
 	return r;
 }
+
+size_t malloc_good_size(size_t size)
+{
+	if (size == 0) {
+		return 1;
+	} else if (size <= malloc_maxsize) {
+		int i, j;
+		/* round up to the nearest power of 2, with same approach
+		 * as malloc_bytes() uses. */
+		j = 1;
+		i = size - 1;
+		while (i >>= 1)
+			j++;
+		return ((size_t)1) << j;
+	} else {
+		return pageround(size);
+	}
+}
-- 
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