From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Tue, 13 Oct 2009 21:13:49 +0000 (-0400)
Subject: set the reader side of the buffer-ready pipe non-blocking (experimental)
X-Git-Tag: v1.9.1~870
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=c378e5b330530ab716a1743a66d6ec9f4a2464f9;p=lttng-ust.git

set the reader side of the buffer-ready pipe non-blocking (experimental)
---

diff --git a/libust/relay.c b/libust/relay.c
index 3259adee..a31cdf7a 100644
--- a/libust/relay.c
+++ b/libust/relay.c
@@ -26,6 +26,7 @@
 #include <sys/mman.h>
 #include <sys/ipc.h>
 #include <sys/shm.h>
+#include <fcntl.h>
 //#include "list.h"
 #include "relay.h"
 #include "channels.h"
@@ -1503,6 +1504,12 @@ static int ltt_relay_create_buffer(struct ltt_trace_struct *trace,
 	ltt_buf->data_ready_fd_read = fds[0];
 	ltt_buf->data_ready_fd_write = fds[1];
 
+	/* FIXME: do we actually need this? */
+	result = fcntl(fds[0], F_SETFL, O_NONBLOCK);
+	if(result == -1) {
+		PERROR("fcntl");
+	}
+
 //ust//	ltt_buf->commit_seq = malloc(sizeof(ltt_buf->commit_seq) * n_subbufs);
 //ust//	if(!ltt_buf->commit_seq) {
 //ust//		return -1;