src/share/vm/utilities/accessFlags.cpp

rev 6875 : 8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
Reviewed-by: mgerdin, coleenp, bdelsart

*** 60,69 ****
--- 60,84 ----
      new_flags = old_flags & ~bits;
      f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
    } while(f != old_flags);
  }
  
+ // Returns true iff this thread succeeded setting the bit.
+ bool AccessFlags::atomic_set_one_bit(jint bit) {
+   // Atomically update the flags with the bit given
+   jint old_flags, new_flags, f;
+   bool is_setting_bit = false;
+   do {
+     old_flags = _flags;
+     new_flags = old_flags | bit;
+     is_setting_bit = old_flags != new_flags;
+     f = Atomic::cmpxchg(new_flags, &_flags, old_flags);
+   } while(f != old_flags);
+ 
+   return is_setting_bit;
+ }
+ 
  #if !defined(PRODUCT) || INCLUDE_JVMTI
  
  void AccessFlags::print_on(outputStream* st) const {
    if (is_public      ()) st->print("public "      );
    if (is_private     ()) st->print("private "     );