X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-defer-impl.h;h=f96553365ba4f51035f427798edd2ac4eb981f13;hp=c762400574cdea19947f0fd265d8c2a4fbb81f6e;hb=7dea28e7c3827cfcfaea71caa81648ea8a19cfe5;hpb=f50c11aab867de9a5b7acc9a826fb9417874bc66

diff --git a/urcu-defer-impl.h b/urcu-defer-impl.h
index c762400..f965533 100644
--- a/urcu-defer-impl.h
+++ b/urcu-defer-impl.h
@@ -84,12 +84,6 @@
  * This is required to permit relinking with newer versions of the library.
  */
 
-#ifdef DEBUG_RCU
-#define rcu_assert(args...)	assert(args)
-#else
-#define rcu_assert(args...)
-#endif
-
 /*
  * defer queue.
  * Contains pointers. Encoded to save space when same callback is often used.
@@ -148,7 +142,7 @@ 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 +154,9 @@ 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 +193,22 @@ 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);
+			}
+		}
 	}
 }
 
@@ -373,7 +381,7 @@ static 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();
 	}