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

diff --git a/libust/relay.c b/libust/relay.c
index 3259adee432da29fb1b063605b1d7bab01be3255..a31cdf7a1ca3ad4b6dc5ff69eeba7da8e2b88b4f 100644 (file)
--- 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;