extern "C" {
#endif
-/* Default is RCU_MEMBARRIER on linux */
+/* Default is RCU_MEMBARRIER */
#if !defined(RCU_MEMBARRIER) && !defined(RCU_MB) && !defined(RCU_SIGNAL)
-# ifdef __linux__
-# define RCU_MEMBARRIER
-# else
-# define RCU_MB
-# endif
+#define RCU_MEMBARRIER
+#endif
+
+/*
+ * RCU_MEMBARRIER is only possibly available on Linux. Fallback to RCU_MB
+ * otherwise.
+ */
+#if !defined(__linux__) && defined(RCU_MEMBARRIER)
+#undef RCU_MEMBARRIER
+#define RCU_MB
#endif
#ifdef RCU_MEMBARRIER
#define SIGRCU SIGUSR1
#endif
-/*
- * If a reader is really non-cooperative and refuses to commit its
- * rcu_active_readers count to memory (there is no barrier in the reader
- * per-se), kick it after a few loops waiting for it.
- */
-#define KICK_READER_LOOPS 10000
-
-/*
- * Active attempts to check for reader Q.S. before calling futex().
- */
-#define RCU_QS_ACTIVE_ATTEMPTS 100
-
#ifdef DEBUG_RCU
#define rcu_assert(args...) assert(args)
#else
static inline void debug_yield_init(void)
{
- rand_yield = time(NULL) ^ pthread_self();
+ rand_yield = time(NULL) ^ (unsigned long) pthread_self();
}
#else
static inline void debug_yield_read(void)
static inline void smp_mb_slave(int group)
{
- if (likely(has_sys_membarrier))
+ if (caa_likely(has_sys_membarrier))
cmm_barrier();
else
cmm_smp_mb();
*/
static inline void wake_up_gp(void)
{
- if (unlikely(uatomic_read(&gp_futex) == -1)) {
+ if (caa_unlikely(uatomic_read(&gp_futex) == -1)) {
uatomic_set(&gp_futex, 0);
futex_async(&gp_futex, FUTEX_WAKE, 1,
NULL, NULL, 0);
* rcu_gp_ctr is
* RCU_GP_COUNT | (~RCU_GP_CTR_PHASE or RCU_GP_CTR_PHASE)
*/
- if (likely(!(tmp & RCU_GP_CTR_NEST_MASK))) {
+ if (caa_likely(!(tmp & RCU_GP_CTR_NEST_MASK))) {
_CMM_STORE_SHARED(rcu_reader.ctr, _CMM_LOAD_SHARED(rcu_gp_ctr));
/*
* Set active readers count for outermost nesting level before
* Finish using rcu before decrementing the pointer.
* See smp_mb_master().
*/
- if (likely((tmp & RCU_GP_CTR_NEST_MASK) == RCU_GP_COUNT)) {
+ if (caa_likely((tmp & RCU_GP_CTR_NEST_MASK) == RCU_GP_COUNT)) {
smp_mb_slave(RCU_MB_GROUP);
_CMM_STORE_SHARED(rcu_reader.ctr, rcu_reader.ctr - RCU_GP_COUNT);
/* write rcu_reader.ctr before read futex */