Fix: handle sys_futex() FUTEX_WAIT interrupted by signal

[urcu.git] / urcu / uatomic / generic.h

diff --git a/urcu/uatomic/generic.h b/urcu/uatomic/generic.h
index 04f4afd715800dd02446183d183c4f896de142c1..37f59cc11429229ce0dc19aa17a746b03f458cb7 100644 (file)
--- a/urcu/uatomic/generic.h
+++ b/urcu/uatomic/generic.h
@@ -29,7 +29,7 @@ extern "C" {
 #endif
 
 #ifndef uatomic_set
-#define uatomic_set(addr, v)   CMM_STORE_SHARED(*(addr), (v))
+#define uatomic_set(addr, v)   ((void) CMM_STORE_SHARED(*(addr), (v)))
 #endif
 
 #ifndef uatomic_read
@@ -38,19 +38,21 @@ extern "C" {
 
 #if !defined __OPTIMIZE__  || defined UATOMIC_NO_LINK_ERROR
 static inline __attribute__((always_inline))
-void _uatomic_link_error()
+void _uatomic_link_error(void)
 {
 #ifdef ILLEGAL_INSTR
-       /* generate an illegal instruction. Cannot catch this with linker tricks
-        * when optimizations are disabled. */
+       /*
+        * generate an illegal instruction. Cannot catch this with
+        * linker tricks when optimizations are disabled.
+        */
        __asm__ __volatile__(ILLEGAL_INSTR);
 #else
-       __builtin_trap ();
+       __builtin_trap();
 #endif
 }
 
 #else /* #if !defined __OPTIMIZE__  || defined UATOMIC_NO_LINK_ERROR */
-extern void _uatomic_link_error ();
+extern void _uatomic_link_error(void);
 #endif /* #else #if !defined __OPTIMIZE__  || defined UATOMIC_NO_LINK_ERROR */
 
 /* cmpxchg */
@@ -122,6 +124,9 @@ void _uatomic_and(void *addr, unsigned long val,
        (_uatomic_and((addr),                   \
                caa_cast_long_keep_sign(v),     \
                sizeof(*(addr))))
+#define cmm_smp_mb__before_uatomic_and()       cmm_barrier()
+#define cmm_smp_mb__after_uatomic_and()                cmm_barrier()
+
 #endif
 
 /* uatomic_or */
@@ -159,8 +164,12 @@ void _uatomic_or(void *addr, unsigned long val,
        (_uatomic_or((addr),                    \
                caa_cast_long_keep_sign(v),     \
                sizeof(*(addr))))
+#define cmm_smp_mb__before_uatomic_or()                cmm_barrier()
+#define cmm_smp_mb__after_uatomic_or()         cmm_barrier()
+
 #endif
 
+
 /* uatomic_add_return */
 
 #ifndef uatomic_add_return
@@ -328,6 +337,9 @@ void _uatomic_and(void *addr, unsigned long val, int len)
        (_uatomic_and((addr),                   \
                caa_cast_long_keep_sign(v),     \
                sizeof(*(addr))))
+#define cmm_smp_mb__before_uatomic_and()       cmm_barrier()
+#define cmm_smp_mb__after_uatomic_and()                cmm_barrier()
+
 #endif /* #ifndef uatomic_and */
 
 #ifndef uatomic_or
@@ -399,6 +411,9 @@ void _uatomic_or(void *addr, unsigned long val, int len)
        (_uatomic_or((addr),                    \
                caa_cast_long_keep_sign(v),     \
                sizeof(*(addr))))
+#define cmm_smp_mb__before_uatomic_or()                cmm_barrier()
+#define cmm_smp_mb__after_uatomic_or()         cmm_barrier()
+
 #endif /* #ifndef uatomic_or */
 
 #ifndef uatomic_add_return
@@ -559,19 +574,27 @@ 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_uatomic_add()       cmm_barrier()
+#define cmm_smp_mb__after_uatomic_add()                cmm_barrier()
 #endif
 
 #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_uatomic_sub()       cmm_smp_mb__before_uatomic_add()
+#define cmm_smp_mb__after_uatomic_sub()                cmm_smp_mb__after_uatomic_add()
 
 #ifndef uatomic_inc
 #define uatomic_inc(addr)              uatomic_add((addr), 1)
+#define cmm_smp_mb__before_uatomic_inc()       cmm_smp_mb__before_uatomic_add()
+#define cmm_smp_mb__after_uatomic_inc()                cmm_smp_mb__after_uatomic_add()
 #endif
 
 #ifndef uatomic_dec
 #define uatomic_dec(addr)              uatomic_add((addr), -1)
+#define cmm_smp_mb__before_uatomic_dec()       cmm_smp_mb__before_uatomic_add()
+#define cmm_smp_mb__after_uatomic_dec()                cmm_smp_mb__after_uatomic_add()
 #endif
 
 #ifdef __cplusplus