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authorMaxim Kuvyrkov <maxim@codesourcery.com>2012-08-13 19:31:00 -0700
committerMaxim Kuvyrkov <maxim@codesourcery.com>2012-08-13 19:31:00 -0700
commit51a9ba860ae3305d475f43f568e8fa51b8a53b6e (patch)
tree77e13975116d3ca0e7c98c2ec01a63a47988f221 /include
parentcc184e11fe3d3624c0ff622e018abc608346a342 (diff)
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Add explicit acquire/release semantics to atomic_exchange_and_add.
Diffstat (limited to 'include')
-rw-r--r--include/atomic.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/include/atomic.h b/include/atomic.h
index 3ccb46d9ed..bc20772f2b 100644
--- a/include/atomic.h
+++ b/include/atomic.h
@@ -198,8 +198,12 @@
/* Add VALUE to *MEM and return the old value of *MEM. */
-#ifndef atomic_exchange_and_add
-# define atomic_exchange_and_add(mem, value) \
+#ifndef atomic_exchange_and_add_acq
+# ifdef atomic_exchange_and_add
+# define atomic_exchange_and_add_acq(mem, value) \
+ atomic_exchange_and_add (mem, value)
+# else
+# define atomic_exchange_and_add_acq(mem, value) \
({ __typeof (*(mem)) __atg6_oldval; \
__typeof (mem) __atg6_memp = (mem); \
__typeof (*(mem)) __atg6_value = (value); \
@@ -213,8 +217,18 @@
__atg6_oldval), 0)); \
\
__atg6_oldval; })
+# endif
#endif
+#ifndef atomic_exchange_and_add_rel
+# define atomic_exchange_and_add_rel(mem, value) \
+ atomic_exchange_and_add_acq(mem, value)
+#endif
+
+#ifndef atomic_exchange_and_add
+# define atomic_exchange_and_add(mem, value) \
+ atomic_exchange_and_add_acq(mem, value)
+#endif
#ifndef catomic_exchange_and_add
# define catomic_exchange_and_add(mem, value) \