From cca6d953c243dbb05d7cc7a4d26d90c99173bf2c Mon Sep 17 00:00:00 2001
From: Zuxy Meng <zuxy.meng@gmail.com>
Date: Wed, 19 Mar 2008 07:30:34 +0000
Subject: [PATCH] Apply "alloc_size" attribute to av_alloc, av_realloc and
av_mallocz
Originally committed as revision 12499 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavutil/mem.h | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/libavutil/mem.h b/libavutil/mem.h
index c68117d43d7..d73e225b25c 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -48,6 +48,12 @@
#define av_malloc_attrib
#endif
+#if defined (__GNUC__) && (__GNU__ > 4 || __GNU__ == 4 && __GNU_MINOR__ > 1)
+ #define av_alloc_size(n) __attribute__((alloc_size(n)))
+#else
+ #define av_alloc_size(n)
+#endif
+
/**
* Allocate a block of \p size bytes with alignment suitable for all
* memory accesses (including vectors if available on the CPU).
@@ -56,7 +62,7 @@
* it.
* @see av_mallocz()
*/
-void *av_malloc(unsigned int size) av_malloc_attrib;
+void *av_malloc(unsigned int size) av_malloc_attrib av_alloc_size(1);
/**
* Allocate or reallocate a block of memory.
@@ -70,7 +76,7 @@ void *av_malloc(unsigned int size) av_malloc_attrib;
* reallocate or the function is used to free the memory block.
* @see av_fast_realloc()
*/
-void *av_realloc(void *ptr, unsigned int size);
+void *av_realloc(void *ptr, unsigned int size) av_alloc_size(2);
/**
* Free a memory block which has been allocated with av_malloc(z)() or
@@ -91,7 +97,7 @@ void av_free(void *ptr);
* it.
* @see av_malloc()
*/
-void *av_mallocz(unsigned int size) av_malloc_attrib;
+void *av_mallocz(unsigned int size) av_malloc_attrib av_alloc_size(1);
/**
* Duplicate the string \p s.
--
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