qsbr: micro optimization of the gp use.

[urcu.git] / urcu-qsbr.c

diff --git a/urcu-qsbr.c b/urcu-qsbr.c
index 3f21be3160731979b6f39455b1202ccf00849237..1955277ac65d309e8b187f82b2eec242a7d211f2 100644 (file)
--- a/urcu-qsbr.c
+++ b/urcu-qsbr.c
@@ -42,7 +42,7 @@ pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
 /*
  * Global grace period counter.
  */
-long urcu_gp_ctr = 0;
+long urcu_gp_ctr = 1;
 
 /*
  * Written to only by each individual reader. Read by both the reader and the
@@ -139,9 +139,9 @@ static void wait_for_quiescent_state(void)
 
 void synchronize_rcu(void)
 {
-       int was_online;
+       long was_online;
 
-       was_online = rcu_reader_qs_gp & 1;
+       was_online = rcu_reader_qs_gp;
 
        /*
         * Mark the writer thread offline to make sure we don't wait for
@@ -158,7 +158,7 @@ void synchronize_rcu(void)
        internal_urcu_unlock();
 
        if (was_online)
-               _STORE_SHARED(rcu_reader_qs_gp, LOAD_SHARED(urcu_gp_ctr) + 1);
+               _STORE_SHARED(rcu_reader_qs_gp, LOAD_SHARED(urcu_gp_ctr));
        smp_mb();
 }