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authorEric Wong <normalperson@yhbt.net>2006-09-07 19:26:51 +0000
committerEric Wong <normalperson@yhbt.net>2006-09-07 19:26:51 +0000
commitf5c7f3da31c948d70da63f593162f78db79e4833 (patch)
treee698168c690a01dffa7bc9ae8389b2eca447c77c /src/utils.c
parent12d253118db6c83483ab477c5923663f18d80d35 (diff)
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utils.c: fix xrealloc
(based on suggested patch by Jan-Benedict Glaw): > While hacking mpd, I noticed that an assert()ion in xrealloc is wrong. > A null size is perfectly legal, so we shouldn't assert on that. Since some C libraries return NULL when size == 0, we'll make sure we get a free()-able pointer since some of those C libraries also barf on free(NULL). git-svn-id: https://svn.musicpd.org/mpd/trunk@4740 09075e82-0dd4-0310-85a5-a0d7c8717e4f
Diffstat (limited to 'src/utils.c')
-rw-r--r--src/utils.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/src/utils.c b/src/utils.c
index 60fa3f135..919553d3e 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -133,13 +133,14 @@ mpd_malloc void *xmalloc(size_t size)
mpd_malloc void *xrealloc(void *ptr, size_t size)
{
- void *ret;
+ void *ret = realloc(ptr, size);
- /* hmm... realloc to 0 isn't uncommon..., is it? this check
- * may be too extreme... (eric) */
- assert((mpd_likely(size)));
+ /* some C libraries return NULL when size == 0,
+ * make sure we get a free()-able pointer (free(NULL)
+ * doesn't work with all C libraries, either) */
+ if (mpd_unlikely(!ret && !size))
+ ret = realloc(ptr, 1);
- ret = realloc(ptr, size);
if (mpd_unlikely(!ret))
FATAL("OOM: realloc\n");
return ret;