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qsbr: save two full smp_mb() when the writer is also a reader.
[urcu.git]
/
urcu.c
diff --git
a/urcu.c
b/urcu.c
index 8fae8faea8f4bd7b260cdcf6df69777a753a9b58..39f5619773ba383b402fb1c536672af990129ed3 100644
(file)
--- a/
urcu.c
+++ b/
urcu.c
@@
-36,11
+36,11
@@
/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
#include "urcu.h"
/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
#include "urcu.h"
-#ifndef
CONFIG_URCU_AVOID_SIGNALS
+#ifndef
URCU_MB
void __attribute__((constructor)) urcu_init(void);
void __attribute__((destructor)) urcu_exit(void);
#else
void __attribute__((constructor)) urcu_init(void);
void __attribute__((destructor)) urcu_exit(void);
#else
-
static inline
void urcu_init(void)
+void urcu_init(void)
{
}
#endif
{
}
#endif
@@
-127,7
+127,7
@@
static void switch_next_urcu_qparity(void)
STORE_SHARED(urcu_gp_ctr, urcu_gp_ctr ^ RCU_GP_CTR_BIT);
}
STORE_SHARED(urcu_gp_ctr, urcu_gp_ctr ^ RCU_GP_CTR_BIT);
}
-#ifdef
CONFIG_URCU_AVOID_SIGNALS
+#ifdef
URCU_MB
#ifdef HAS_INCOHERENT_CACHES
static void force_mb_single_thread(struct reader_registry *index)
{
#ifdef HAS_INCOHERENT_CACHES
static void force_mb_single_thread(struct reader_registry *index)
{
@@
-139,7
+139,7
@@
static void force_mb_all_threads(void)
{
smp_mb();
}
{
smp_mb();
}
-#else /* #ifdef
CONFIG_URCU_AVOID_SIGNALS
*/
+#else /* #ifdef
URCU_MB
*/
#ifdef HAS_INCOHERENT_CACHES
static void force_mb_single_thread(struct reader_registry *index)
{
#ifdef HAS_INCOHERENT_CACHES
static void force_mb_single_thread(struct reader_registry *index)
{
@@
-206,7
+206,7
@@
static void force_mb_all_threads(void)
}
smp_mb(); /* read ->need_mb before ending the barrier */
}
}
smp_mb(); /* read ->need_mb before ending the barrier */
}
-#endif /* #else #ifdef
CONFIG_URCU_AVOID_SIGNALS
*/
+#endif /* #else #ifdef
URCU_MB
*/
void wait_for_quiescent_state(void)
{
void wait_for_quiescent_state(void)
{
@@
-420,7
+420,7
@@
void rcu_unregister_thread(void)
internal_urcu_unlock();
}
internal_urcu_unlock();
}
-#ifndef
CONFIG_URCU_AVOID_SIGNALS
+#ifndef
URCU_MB
static void sigurcu_handler(int signo, siginfo_t *siginfo, void *context)
{
/*
static void sigurcu_handler(int signo, siginfo_t *siginfo, void *context)
{
/*
@@
-473,4
+473,4
@@
void urcu_exit(void)
assert(act.sa_sigaction == sigurcu_handler);
free(registry);
}
assert(act.sa_sigaction == sigurcu_handler);
free(registry);
}
-#endif /* #ifndef
CONFIG_URCU_AVOID_SIGNALS
*/
+#endif /* #ifndef
URCU_MB
*/
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