From 16e2b0213b54991d9f493d4c0ee7efca18436427 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 18 Nov 2015 01:23:21 +0100
Subject: Clean up peer task handling

---
 src/peer.c | 18 +++++++++++++-----
 src/poll.c |  4 ++--
 src/task.c |  9 ++++-----
 src/task.h | 12 +++++++++---
 4 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/src/peer.c b/src/peer.c
index 9f26803..22339b4 100644
--- a/src/peer.c
+++ b/src/peer.c
@@ -364,13 +364,21 @@ void fastd_peer_handle_resolve(fastd_peer_t *peer, fastd_remote_t *remote, size_
 		init_handshake(peer);
 }
 
-/** Schedules the peer maintenance task (or removes the schduled task if there's nothing to do) */
-void schedule_peer_task(fastd_peer_t *peer) {
-	fastd_task_unschedule(&peer->task);
-
+/** Schedules the peer maintenance task (or removes the scheduled task if there's nothing to do) */
+static void schedule_peer_task(fastd_peer_t *peer) {
 	fastd_timeout_t timeout = fastd_timeout_min(peer->reset_timeout, peer->keepalive_timeout);
-	if (timeout != fastd_timeout_inv)
+	if (timeout == fastd_timeout_inv) {
+		pr_debug2("Removing scheduled task for %P", peer);
+		fastd_task_unschedule(&peer->task);
+	}
+	else if (fastd_task_timeout(&peer->task) > timeout) {
+		pr_debug2("Replacing scheduled task for %P", peer);
+		fastd_task_unschedule(&peer->task);
 		fastd_task_schedule(&peer->task, TASK_TYPE_PEER, timeout);
+	}
+	else {
+		pr_debug2("Keeping scheduled task for %P", peer);
+	}
 }
 
 /** Initializes a peer */
diff --git a/src/poll.c b/src/poll.c
index fed7001..02ee00b 100644
--- a/src/poll.c
+++ b/src/poll.c
@@ -53,8 +53,8 @@
 
 /** Returns the time to the next task or -1 */
 static inline int task_timeout(void) {
-	fastd_timeout_t timeout;
-	if (!fastd_task_timeout(&timeout))
+	fastd_timeout_t timeout = fastd_task_queue_timeout();
+	if (timeout == fastd_timeout_inv)
 		return -1;
 
 	int diff_msec = timeout - ctx.now;
diff --git a/src/task.c b/src/task.c
index e1dc77d..079fc4a 100644
--- a/src/task.c
+++ b/src/task.c
@@ -76,11 +76,10 @@ void fastd_task_reschedule(fastd_task_t *task, fastd_timeout_t timeout) {
 	fastd_pqueue_insert(&ctx.task_queue, &task->entry);
 }
 
-/** Gets the timeout of the next task (if any) */
-bool fastd_task_timeout(fastd_timeout_t *timeout) {
+/** Gets the timeout of the next task in the task queue */
+fastd_timeout_t fastd_task_queue_timeout(void) {
 	if (!ctx.task_queue)
-		return false;
+		return fastd_timeout_inv;
 
-	*timeout = ctx.task_queue->value;
-	return true;
+	return ctx.task_queue->value;
 }
diff --git a/src/task.h b/src/task.h
index 91bacc0..667386a 100644
--- a/src/task.h
+++ b/src/task.h
@@ -44,6 +44,7 @@ struct fastd_task {
 void fastd_task_handle(void);
 
 void fastd_task_reschedule(fastd_task_t *task, fastd_timeout_t timeout);
+fastd_timeout_t fastd_task_queue_timeout(void);
 
 
 /** Checks if the given task is currently scheduled */
@@ -51,6 +52,14 @@ static inline bool fastd_task_scheduled(fastd_task_t *task) {
 	return fastd_pqueue_linked(&task->entry);
 }
 
+/** Gets the timeout of a task */
+static inline fastd_timeout_t fastd_task_timeout(fastd_task_t *task) {
+	if (!fastd_task_scheduled(task))
+		return fastd_timeout_inv;
+
+	return task->entry.value;
+}
+
 /** Removes a task from the queue */
 static inline void fastd_task_unschedule(fastd_task_t *task) {
 	fastd_pqueue_remove(&task->entry);
@@ -66,6 +75,3 @@ static inline void fastd_task_schedule(fastd_task_t *task, fastd_task_type_t typ
 	task->type = type;
 	fastd_task_reschedule(task, timeout);
 }
-
-
-bool fastd_task_timeout(fastd_timeout_t *timeout);
-- 
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