uatomic: add memory barrier API for and/or/add/sub/inc/sub

[userspace-rcu.git] / urcu / uatomic / generic.h

diff --git a/urcu/uatomic/generic.h b/urcu/uatomic/generic.h
index bf7cc6aa05172b5072368ae381d60fc1aa31a6d3..4ef71c77604eb4b96ba7913b4268aef6a3618250 100644 (file)
--- a/urcu/uatomic/generic.h
+++ b/urcu/uatomic/generic.h
@@ -81,9 +81,10 @@ unsigned long _uatomic_cmpxchg(void *addr, unsigned long old,
 }
 
 
-#define uatomic_cmpxchg(addr, old, _new)                                   \
-       ((__typeof__(*(addr))) _uatomic_cmpxchg((addr), (unsigned long)(old),\
-                                               (unsigned long)(_new),      \
+#define uatomic_cmpxchg(addr, old, _new)                                     \
+       ((__typeof__(*(addr))) _uatomic_cmpxchg((addr),                       \
+                                               caa_cast_long_keep_sign(old), \
+                                               caa_cast_long_keep_sign(_new),\
                                                sizeof(*(addr))))
 
 
@@ -119,8 +120,11 @@ void _uatomic_and(void *addr, unsigned long val,
 
 #define uatomic_and(addr, v)                   \
        (_uatomic_and((addr),                   \
-                     (unsigned long)(v),       \
-                     sizeof(*(addr))))
+               caa_cast_long_keep_sign(v),     \
+               sizeof(*(addr))))
+#define cmm_smp_mb__before_and()       cmm_barrier()
+#define cmm_smp_mb__after_and()                cmm_barrier()
+
 #endif
 
 /* uatomic_or */
@@ -156,10 +160,14 @@ void _uatomic_or(void *addr, unsigned long val,
 
 #define uatomic_or(addr, v)                    \
        (_uatomic_or((addr),                    \
-                    (unsigned long)(v),        \
-                    sizeof(*(addr))))
+               caa_cast_long_keep_sign(v),     \
+               sizeof(*(addr))))
+#define cmm_smp_mb__before_or()                cmm_barrier()
+#define cmm_smp_mb__after_or()         cmm_barrier()
+
 #endif
 
+
 /* uatomic_add_return */
 
 #ifndef uatomic_add_return
@@ -188,10 +196,10 @@ unsigned long _uatomic_add_return(void *addr, unsigned long val,
 }
 
 
-#define uatomic_add_return(addr, v)                                    \
-       ((__typeof__(*(addr))) _uatomic_add_return((addr),              \
-                                                 (unsigned long)(v),   \
-                                                 sizeof(*(addr))))
+#define uatomic_add_return(addr, v)                                        \
+       ((__typeof__(*(addr))) _uatomic_add_return((addr),                  \
+                                               caa_cast_long_keep_sign(v), \
+                                               sizeof(*(addr))))
 #endif /* #ifndef uatomic_add_return */
 
 #ifndef uatomic_xchg
@@ -253,7 +261,8 @@ unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
 }
 
 #define uatomic_xchg(addr, v)                                              \
-       ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
+       ((__typeof__(*(addr))) _uatomic_exchange((addr),                    \
+                                               caa_cast_long_keep_sign(v), \
                                                sizeof(*(addr))))
 #endif /* #ifndef uatomic_xchg */
 
@@ -322,10 +331,13 @@ void _uatomic_and(void *addr, unsigned long val, int len)
        _uatomic_link_error();
 }
 
-#define uatomic_and(addr, v)           \
-       (_uatomic_and((addr),           \
-                   (unsigned long)(v), \
-                   sizeof(*(addr))))
+#define uatomic_and(addr, v)                   \
+       (_uatomic_and((addr),                   \
+               caa_cast_long_keep_sign(v),     \
+               sizeof(*(addr))))
+#define cmm_smp_mb__before_and()       cmm_barrier()
+#define cmm_smp_mb__after_and()                cmm_barrier()
+
 #endif /* #ifndef uatomic_and */
 
 #ifndef uatomic_or
@@ -393,10 +405,13 @@ void _uatomic_or(void *addr, unsigned long val, int len)
        _uatomic_link_error();
 }
 
-#define uatomic_or(addr, v)            \
-       (_uatomic_or((addr),            \
-                    (unsigned long)(v),\
-                    sizeof(*(addr))))
+#define uatomic_or(addr, v)                    \
+       (_uatomic_or((addr),                    \
+               caa_cast_long_keep_sign(v),     \
+               sizeof(*(addr))))
+#define cmm_smp_mb__before_or()                cmm_barrier()
+#define cmm_smp_mb__after_or()         cmm_barrier()
+
 #endif /* #ifndef uatomic_or */
 
 #ifndef uatomic_add_return
@@ -469,10 +484,10 @@ unsigned long _uatomic_add_return(void *addr, unsigned long val, int len)
        return 0;
 }
 
-#define uatomic_add_return(addr, v)                                    \
-       ((__typeof__(*(addr))) _uatomic_add_return((addr),              \
-                                                 (unsigned long)(v),   \
-                                                 sizeof(*(addr))))
+#define uatomic_add_return(addr, v)                                        \
+       ((__typeof__(*(addr))) _uatomic_add_return((addr),                  \
+                                               caa_cast_long_keep_sign(v), \
+                                               sizeof(*(addr))))
 #endif /* #ifndef uatomic_add_return */
 
 #ifndef uatomic_xchg
@@ -546,7 +561,8 @@ unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
 }
 
 #define uatomic_xchg(addr, v)                                              \
-       ((__typeof__(*(addr))) _uatomic_exchange((addr), (unsigned long)(v), \
+       ((__typeof__(*(addr))) _uatomic_exchange((addr),                    \
+                                               caa_cast_long_keep_sign(v), \
                                                sizeof(*(addr))))
 #endif /* #ifndef uatomic_xchg */
 
@@ -556,17 +572,27 @@ unsigned long _uatomic_exchange(void *addr, unsigned long val, int len)
 
 #ifndef uatomic_add
 #define uatomic_add(addr, v)           (void)uatomic_add_return((addr), (v))
+#define cmm_smp_mb__before_add()       cmm_barrier()
+#define cmm_smp_mb__after_add()                cmm_barrier()
 #endif
 
-#define uatomic_sub_return(addr, v)    uatomic_add_return((addr), -(v))
-#define uatomic_sub(addr, v)           uatomic_add((addr), -(v))
+#define uatomic_sub_return(addr, v)    \
+       uatomic_add_return((addr), -(caa_cast_long_keep_sign(v)))
+#define uatomic_sub(addr, v)           \
+       uatomic_add((addr), -(caa_cast_long_keep_sign(v)))
+#define cmm_smp_mb__before_sub()       cmm_smp_mb__before_add()
+#define cmm_smp_mb__after_sub()                cmm_smp_mb__after_add()
 
 #ifndef uatomic_inc
 #define uatomic_inc(addr)              uatomic_add((addr), 1)
+#define cmm_smp_mb__before_inc()       cmm_smp_mb__before_add()
+#define cmm_smp_mb__after_inc()                cmm_smp_mb__after_add()
 #endif
 
 #ifndef uatomic_dec
 #define uatomic_dec(addr)              uatomic_add((addr), -1)
+#define cmm_smp_mb__before_dec()       cmm_smp_mb__before_add()
+#define cmm_smp_mb__after_dec()                cmm_smp_mb__after_add()
 #endif
 
 #ifdef __cplusplus