Changeset 93450 in webkit

Timestamp:

Aug 19, 2011, 4:22:16 PM (14 years ago)

Author:

dbates@webkit.org

Message:

Implement WTF::atomic{Increment, Decrement}() for QNX
​https://bugs.webkit.org/show_bug.cgi?id=66605

Reviewed by Darin Adler.

• wtf/Atomics.h:

(WTF::atomicIncrement):
(WTF::atomicDecrement):

Location:

trunk/Source/JavaScriptCore

Files:

• ChangeLog (modified) (1 diff)
• wtf/Atomics.h (modified) (2 diffs)

trunk/Source/JavaScriptCore/ChangeLog

@@ +1 @@
+2011-08-19  Daniel Bates  <dbates@webkit.org>
+
+        Implement WTF::atomic{Increment, Decrement}() for QNX
+        https://bugs.webkit.org/show_bug.cgi?id=66605
+
+        Reviewed by Darin Adler.
+
+        * wtf/Atomics.h:
+        (WTF::atomicIncrement):
+        (WTF::atomicDecrement):
+
 2011-08-19  Beth Dakin  <bdakin@apple.com>
 

trunk/Source/JavaScriptCore/wtf/Atomics.h

@@ -68 +68 @@
 #elif OS(ANDROID)
 #include <cutils/atomic.h>
+#elif OS(QNX)
+#include <atomic.h>
 #elif COMPILER(GCC) && !OS(SYMBIAN)
 #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 2))
@@ -95 +97 @@
 inline int atomicDecrement(int volatile* addend) { return OSAtomicDecrement32Barrier(const_cast<int*>(addend)); }
 
+#elif OS(QNX)
+#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1
+
+// Note, atomic_{add, sub}_value() return the previous value of addend's content.
+inline int atomicIncrement(int volatile* addend) { return static_cast<int>(atomic_add_value(reinterpret_cast<unsigned volatile*>(addend), 1)) + 1; }
+inline int atomicDecrement(int volatile* addend) { return static_cast<int>(atomic_sub_value(reinterpret_cast<unsigned volatile*>(addend), 1)) - 1; }
+
 #elif OS(ANDROID)