From: Casey Bodley <casey@linuxbox.com>
Date: Thu, 4 Sep 2014 15:10:46 +0000 (-0400)
Subject: atomic: add and sub return their result
X-Git-Tag: v0.93~265^2~26
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a39cbe2b6fdba2db0964c24bf315ee1020ffe6eb;p=ceph.git

atomic: add and sub return their result

Signed-off-by: Casey Bodley <casey@linuxbox.com>
Signed-off-by: Matt Benjamin <matt@cohortfs.com>
---

diff --git a/src/include/atomic.h b/src/include/atomic.h
index c1650bef51ae..960123e6e367 100644
--- a/src/include/atomic.h
+++ b/src/include/atomic.h
@@ -100,12 +100,12 @@ namespace ceph {
     AO_t dec() {
       return AO_fetch_and_sub1_write(&val) - 1;
     }
-    void add(AO_t add_me) {
-      AO_fetch_and_add(&val, add_me);
+    AO_t add(AO_t add_me) {
+      return AO_fetch_and_add(&val, add_me) + add_me;
     }
-    void sub(AO_t sub_me) {
+    AO_t sub(AO_t sub_me) {
       AO_t negsub = 0 - sub_me;
-      AO_fetch_and_add_write(&val, (AO_t)negsub);
+      return AO_fetch_and_add_write(&val, negsub) + negsub;
     }
     AO_t read() const {
       // cast away const on the pointer.  this is only needed to build