Merge remote-tracking branch 'qatar/master'

* qatar/master:
  configure: Check for CommandLineToArgvW
  vc1dec: Do not use random pred_flag if motion vector data is skipped
  vp8: Enclose pthread function calls in ifdefs
  snow: refactor code to work around a compiler bug in MSVC.
  vp8: Include the thread headers before using the pthread types
  configure: Check for getaddrinfo in ws2tcpip.h, too
  vp8: implement sliced threading
  vp8: move data from VP8Context->VP8Macroblock
  vp8: refactor decoding a single mb_row
  doc: update api changes with the right commit hashes
  mem: introduce av_malloc_array and av_mallocz_array

Conflicts:
	configure
	doc/APIchanges
	libavcodec/vp8.c
	libavutil/mem.h
	libavutil/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 35 insertions, 2 deletions

diff --git a/libavutil/mem.h b/libavutil/mem.h
index c6c907ea08..4f1e6a0cdf 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -64,9 +64,9 @@
 #endif
 
 #if AV_GCC_VERSION_AT_LEAST(4,3)
-    #define av_alloc_size(n) __attribute__((alloc_size(n)))
+    #define av_alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))
 #else
-    #define av_alloc_size(n)
+    #define av_alloc_size(...)
 #endif
 
 /**
@@ -80,6 +80,22 @@
 void *av_malloc(size_t size) av_malloc_attrib av_alloc_size(1);
 
 /**
+ * Helper function to allocate a block of size * nmemb bytes with
+ * using av_malloc()
+ * @param nmemb Number of elements
+ * @param size Size of the single element
+ * @return Pointer to the allocated block, NULL if the block cannot
+ * be allocated.
+ * @see av_malloc()
+ */
+av_alloc_size(1,2) static inline void *av_malloc_array(size_t nmemb, size_t size)
+{
+    if (size <= 0 || nmemb >= INT_MAX / size)
+        return NULL;
+    return av_malloc(nmemb * size);
+}
+
+/**
  * Allocate or reallocate a block of memory.
  * If ptr is NULL and size > 0, allocate a new block. If
  * size is zero, free the memory block pointed to by ptr.
@@ -136,6 +152,23 @@ void *av_mallocz(size_t size) av_malloc_attrib av_alloc_size(1);
 void *av_calloc(size_t nmemb, size_t size) av_malloc_attrib;
 
 /**
+ * Helper function to allocate a block of size * nmemb bytes with
+ * using av_mallocz()
+ * @param nmemb Number of elements
+ * @param size Size of the single element
+ * @return Pointer to the allocated block, NULL if the block cannot
+ * be allocated.
+ * @see av_mallocz()
+ * @see av_malloc_array()
+ */
+av_alloc_size(1,2) static inline void *av_mallocz_array(size_t nmemb, size_t size)
+{
+    if (size <= 0 || nmemb >= INT_MAX / size)
+        return NULL;
+    return av_mallocz(nmemb * size);
+}
+
+/**
  * Duplicate the string s.
  * @param s string to be duplicated
  * @return Pointer to a newly allocated string containing a