patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / include / asm-sh / atomic.h

diff --git a/include/asm-sh/atomic.h b/include/asm-sh/atomic.h
index e95641a..3c4f805 100644 (file)
--- a/include/asm-sh/atomic.h
+++ b/include/asm-sh/atomic.h
@@ -53,6 +53,8 @@ static __inline__ int atomic_add_return(int i, atomic_t * v)
        return temp;
 }
 
+#define atomic_add_negative(a, v)      (atomic_add_return((a), (v)) < 0)
+
 static __inline__ int atomic_sub_return(int i, atomic_t * v)
 {
        unsigned long temp, flags;
@@ -69,6 +71,16 @@ static __inline__ int atomic_sub_return(int i, atomic_t * v)
 #define atomic_dec_return(v) atomic_sub_return(1,(v))
 #define atomic_inc_return(v) atomic_add_return(1,(v))
 
+/*
+ * atomic_inc_and_test - increment and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
+
 #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
 #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)