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diff src/share/vm/runtime/atomic.cpp @ 3767:2a241e764894

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6941923: RFE: Handling large log files produced by long running Java Applications Summary: supply optinal flags to realize gc log rotation Reviewed-by: ysr, jwilhelm
author minqi
date Fri, 10 Jun 2011 15:08:36 -0700
parents f95d63e2154a
children 7d9e451f5416
line wrap: on
line diff
--- a/src/share/vm/runtime/atomic.cpp	Wed Jun 08 21:48:38 2011 -0400
+++ b/src/share/vm/runtime/atomic.cpp	Fri Jun 10 15:08:36 2011 -0700
@@ -83,3 +83,13 @@
   return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest,
                                        (jint)compare_value);
 }
+
+jlong Atomic::add(jlong    add_value, volatile jlong*    dest) {
+  jlong old = load(dest);
+  jlong new_value = old + add_value;
+  while (old != cmpxchg(new_value, dest, old)) {
+    old = load(dest);
+    new_value = old + add_value;
+  }
+  return old;
+}