Changeset 27711 in webkit for trunk/JavaScriptCore/wtf/FastMalloc.cpp

Timestamp:

Nov 12, 2007, 12:00:29 AM (18 years ago)

Author:

oliver

Message:

Add special fastZeroedMalloc function to replace a
number of fastCalloc calls where one argument was 1.

Reviewed by Darin.

This results in a 0.4% progression in SunSpider, more
than making up for the earlier regression caused by
additional overflow checks.

File:

• trunk/JavaScriptCore/wtf/FastMalloc.cpp (modified) (2 diffs)

trunk/JavaScriptCore/wtf/FastMalloc.cpp

@@ -128 +128 @@
 #endif // NDEBUG
 
+#include <string.h>
+
+namespace WTF {
+void *fastZeroedMalloc(size_t n) 
+{
+    void *result = fastMalloc(n);
+    if (!result)
+        return 0;
+    memset(result, 0, n);
+#ifndef WTF_CHANGES
+    MallocHook::InvokeNewHook(result, n);
+#endif
+    return result;
+}
+    
+}
+
 #if FORCE_SYSTEM_MALLOC
 
@@ -190 +207 @@
 #include <stddef.h>
 #include <stdio.h>
-#include <string.h>
 #if COMPILER(MSVC)
 #define WIN32_LEAN_AND_MEAN