X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-defer-impl.h;h=f1dca8ff85c2289d300cc92a77e9d623cbb39216;hp=a7d0b2f7c45aa0a1054d70aac989293b63c87466;hb=b0a841b4ff807dd29fe0cdbfe24900312f0e627b;hpb=4a6d73787de534cbd7d5fc7a6b60af64de66e7ea

diff --git a/urcu-defer-impl.h b/urcu-defer-impl.h
index a7d0b2f..f1dca8f 100644
--- a/urcu-defer-impl.h
+++ b/urcu-defer-impl.h
@@ -148,7 +148,7 @@ static void mutex_lock_defer(pthread_mutex_t *mutex)
 	while ((ret = pthread_mutex_trylock(mutex)) != 0) {
 		if (ret != EBUSY && ret != EINTR)
 			urcu_die(ret);
-		poll(NULL,0,10);
+		(void) poll(NULL,0,10);
 	}
 #endif /* #else #ifndef DISTRUST_SIGNALS_EXTREME */
 }
@@ -160,8 +160,9 @@ static void wake_up_defer(void)
 {
 	if (caa_unlikely(uatomic_read(&defer_thread_futex) == -1)) {
 		uatomic_set(&defer_thread_futex, 0);
-		futex_noasync(&defer_thread_futex, FUTEX_WAKE, 1,
-		      NULL, NULL, 0);
+		if (futex_noasync(&defer_thread_futex, FUTEX_WAKE, 1,
+				NULL, NULL, 0) < 0)
+			urcu_die(errno);
 	}
 }
 
@@ -198,9 +199,22 @@ static void wait_defer(void)
 		uatomic_set(&defer_thread_futex, 0);
 	} else {
 		cmm_smp_rmb();	/* Read queue before read futex */
-		if (uatomic_read(&defer_thread_futex) == -1)
-			futex_noasync(&defer_thread_futex, FUTEX_WAIT, -1,
-			      NULL, NULL, 0);
+		if (uatomic_read(&defer_thread_futex) != -1)
+			return;
+		while (futex_noasync(&defer_thread_futex, FUTEX_WAIT, -1,
+				NULL, NULL, 0)) {
+			switch (errno) {
+			case EWOULDBLOCK:
+				/* Value already changed. */
+				return;
+			case EINTR:
+				/* Retry if interrupted by signal. */
+				break;	/* Get out of switch. */
+			default:
+				/* Unexpected error. */
+				urcu_die(errno);
+			}
+		}
 	}
 }
 
@@ -300,7 +314,7 @@ end:
 /*
  * _defer_rcu - Queue a RCU callback.
  */
-void _defer_rcu(void (*fct)(void *p), void *p)
+static void _defer_rcu(void (*fct)(void *p), void *p)
 {
 	unsigned long head, tail;
 
@@ -363,7 +377,7 @@ void _defer_rcu(void (*fct)(void *p), void *p)
 	wake_up_defer();
 }
 
-void *thr_defer(void *args)
+static void *thr_defer(void *args)
 {
 	for (;;) {
 		/*
@@ -373,7 +387,7 @@ void *thr_defer(void *args)
 		 */
 		wait_defer();
 		/* Sleeping after wait_defer to let many callbacks enqueue */
-		poll(NULL,0,100);	/* wait for 100ms */
+		(void) poll(NULL,0,100);	/* wait for 100ms */
 		rcu_defer_barrier();
 	}