Changeset 33196 in vbox for trunk/include

Timestamp:

Oct 18, 2010 2:03:32 PM (14 years ago)

Author:

vboxsync

Message:

iprt/asm: make the behavior of ASMAtomicAddU64() match the description (return the old value, not the new value, only 32-bit code affected)

File:

• trunk/include/iprt/asm.h (modified) (1 diff)

trunk/include/iprt/asm.h

@@ -2496 +2496 @@
     return u64;
 # else
-    uint64_t u64New;
+    uint64_t u64Old;
     for (;;)
     {
-        uint64_t u64Old = ASMAtomicUoReadU64(pu64);
-        u64New = u64Old + u64;
+        u64Old = ASMAtomicUoReadU64(pu64);
+        uint64_t u64New = u64Old + u64;
         if (ASMAtomicCmpXchgU64(pu64, u64New, u64Old))
             break;
         ASMNopPause();
     }
-    return u64New;
+    return u64Old;
 # endif
 }