X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=sched.c;h=4ca040f44f337a126ab24b4ec36fb297fa273687;hb=bb899fb1a0c279a2890ff30d11bf7aec50fb92ed;hp=8deb7f383596162e97444c7766f6d15bc60eb92c;hpb=e854df2fe2cfb3ae90a439828fc13cc0fc470aa9;p=paraslash.git

diff --git a/sched.c b/sched.c
index 8deb7f38..4ca040f4 100644
--- a/sched.c
+++ b/sched.c
@@ -451,3 +451,45 @@ int sched_request_barrier_or_min_delay(struct timeval *barrier, struct sched *s)
 	sched_request_timeout(&diff, s);
 	return 1;
 }
+
+static void sched_fd_set(int fd, fd_set *fds, int *max_fileno)
+{
+	assert(fd >= 0 && fd < FD_SETSIZE);
+#if 0
+	{
+		int flags = fcntl(fd, F_GETFL);
+		if (!(flags & O_NONBLOCK)) {
+			PARA_EMERG_LOG("fd %d is a blocking file descriptor\n", fd);
+			exit(EXIT_FAILURE);
+		}
+	}
+#endif
+	FD_SET(fd, fds);
+	*max_fileno = PARA_MAX(*max_fileno, fd);
+}
+
+/**
+ * Instruct the scheduler to monitor an fd for readiness for reading.
+ *
+ * \param fd The file descriptor.
+ * \param s The scheduler.
+ *
+ * \sa \ref sched_monitor_writefd().
+ */
+void sched_monitor_readfd(int fd, struct sched *s)
+{
+	sched_fd_set(fd, &s->rfds, &s->max_fileno);
+}
+
+/**
+ * Instruct the scheduler to monitor an fd for readiness for writing.
+ *
+ * \param fd The file descriptor.
+ * \param s The scheduler.
+ *
+ * \sa \ref sched_monitor_readfd().
+ */
+void sched_monitor_writefd(int fd, struct sched *s)
+{
+	sched_fd_set(fd, &s->wfds, &s->max_fileno);
+}