X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=urcu.c;h=c5abeafa06d3bd796a2148a1effdf90c2c959dd1;hb=143f99b421adc86061c6ce9e70dc932e12303658;hp=5cb470bcaea9e61b312a8e2d839c14ab88eacc80;hpb=66bc4dcd6d823e527395bac6755c17718c3f8e71;p=userspace-rcu.git

diff --git a/urcu.c b/urcu.c
index 5cb470b..c5abeaf 100644
--- a/urcu.c
+++ b/urcu.c
@@ -26,6 +26,7 @@
 #define _BSD_SOURCE
 #define _GNU_SOURCE
 #define _LGPL_SOURCE
+#define _DEFAULT_SOURCE
 #include <stdio.h>
 #include <pthread.h>
 #include <signal.h>
@@ -223,9 +224,22 @@ static void wait_gp(void)
 {
 	/* Read reader_gp before read futex */
 	smp_mb_master(RCU_MB_GROUP);
-	if (uatomic_read(&gp_futex) == -1)
-		futex_async(&gp_futex, FUTEX_WAIT, -1,
-		      NULL, NULL, 0);
+	if (uatomic_read(&gp_futex) != -1)
+		return;
+	while (futex_async(&gp_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);
+		}
+	}
 }
 
 /*