X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Fstatic%2Furcu-qsbr.h;h=f6e55807db267ba66227f1d7046511f56589aa76;hp=f3149569b2a2e2573df57936673d82eaadf0e1d7;hb=708d89f0b396d20522fe87cc80d91072bb9fcb02;hpb=dd61d0772f8dda35aadf9636ebabfaebf24add6a

diff --git a/urcu/static/urcu-qsbr.h b/urcu/static/urcu-qsbr.h
index f314956..f6e5580 100644
--- a/urcu/static/urcu-qsbr.h
+++ b/urcu/static/urcu-qsbr.h
@@ -62,6 +62,12 @@ extern "C" {
 #define rcu_assert(args...)
 #endif
 
+enum rcu_state {
+	RCU_READER_ACTIVE_CURRENT,
+	RCU_READER_ACTIVE_OLD,
+	RCU_READER_INACTIVE,
+};
+
 #ifdef DEBUG_YIELD
 #include <sched.h>
 #include <time.h>
@@ -149,12 +155,16 @@ static inline void wake_up_gp(void)
 	}
 }
 
-static inline int rcu_gp_ongoing(unsigned long *ctr)
+static inline enum rcu_state rcu_reader_state(unsigned long *ctr)
 {
 	unsigned long v;
 
 	v = CMM_LOAD_SHARED(*ctr);
-	return v && (v != rcu_gp_ctr);
+	if (!v)
+		return RCU_READER_INACTIVE;
+	if (v == rcu_gp_ctr)
+		return RCU_READER_ACTIVE_CURRENT;
+	return RCU_READER_ACTIVE_OLD;
 }
 
 /*