X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-defer-impl.h;h=f96553365ba4f51035f427798edd2ac4eb981f13;hp=2cff80792b0a4f6fecc7016e49667a809e36918b;hb=a59f39055b5ecb77b68cf78b9839aa9e8e4ec332;hpb=c060776f6fac830bb34e2b1db2f7676560ef2ea9

diff --git a/urcu-defer-impl.h b/urcu-defer-impl.h
index 2cff807..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.
@@ -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);
+			}
+		}
 	}
 }