X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=sched.h;h=234a8458d5870a1f14c66c81c140b61c0c20bf01;hp=49c1c085d9e09c4d847ce3002ab641c7a265689a;hb=38657223b245405602bc50906a9687ce98f53857;hpb=9de1287d67c9562e9140c6dc7deb0c01c4e10cc0

diff --git a/sched.h b/sched.h
index 49c1c085..234a8458 100644
--- a/sched.h
+++ b/sched.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006-2012 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -41,10 +41,7 @@ struct sched {
  * Before registering a task to the scheduler, the task structure must be
  * filled in properly by the caller.
  *
- * If one of these functions sets \a t->error to a negative value, the
- * task gets unregistered automatically.
- *
- * \sa struct sched.
+ * \sa \ref sched.
  */
 struct task {
 	/**
@@ -55,11 +52,13 @@ struct task {
 	 */
 	void (*pre_select)(struct sched *s, struct task *t);
 	/**
-	 * The postselect hook of \a t.
+	 * The post select hook of \a t.
 	 *
-	 * Evaluate and act upon the results of the previous select call.
+	 * Its purpose is to evaluate and act upon the results of the previous
+	 * select call. If this function returns a negative value, the
+	 * scheduler unregisters the task.
 	 */
-	void (*post_select)(struct sched *s, struct task *t);
+	int (*post_select)(struct sched *s, struct task *t);
 	/** Whether this task is in error state. */
 	int error;
 	/** Position of the task in the pre_select list of the scheduler. */
@@ -68,20 +67,24 @@ struct task {
 	struct list_head post_select_node;
 	/** Descriptive text and current status of the task. */
 	char status[255];
+	/** If less than zero, the task was notified by another task. */
+	int notification;
 };
 
 /**
  * This is set by the scheduler at the beginning of its main loop.  It may be
  * used (read-only) from everywhere. As none of the functions called by the
  * scheduler are allowed to block, this value should be accurate enough so that
- * there is no need to call gettimeofday() directly.
+ * there is no need to call clock_gettime() directly.
  */
 extern struct timeval *now;
 
 void register_task(struct sched *s, struct task *t);
 int schedule(struct sched *s);
 char *get_task_list(struct sched *s);
-void sched_shutdown(struct sched *s);
+void task_notify(struct task *t, int err);
+void task_notify_all(struct sched *s, int err);
+int task_get_notification(struct task *t);
 void sched_min_delay(struct sched *s);
 void sched_request_timeout(struct timeval *to, struct sched *s);
 void sched_request_timeout_ms(long unsigned ms, struct sched *s);