Implement generic task queue to handle handshakes and maintenance

1 files changed, 78 insertions, 0 deletions

diff --git a/src/task.c b/src/task.c
new file mode 100644
index 0000000..44a8ebf
--- /dev/null
+++ b/src/task.c
@@ -0,0 +1,78 @@
+/*
+  Copyright (c) 2012-2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/**
+   \file
+
+   Task queue
+*/
+
+#include "task.h"
+#include "peer.h"
+
+
+/** Performs periodic maintenance tasks */
+static inline void maintenance(void) {
+	fastd_socket_handle_binds();
+	fastd_peer_maintenance();
+
+	fastd_task_reschedule_relative(&ctx.next_maintenance, MAINTENANCE_INTERVAL);
+}
+
+static void handle_task(void) {
+	fastd_task_t *task = container_of(ctx.task_queue, fastd_task_t, entry);
+	fastd_pqueue_remove(ctx.task_queue);
+
+	switch (task->type) {
+	case TASK_TYPE_MAINTENANCE:
+		maintenance();
+		break;
+
+	case TASK_TYPE_HANDSHAKE:
+		fastd_peer_handle_handshake_task(task);
+		break;
+
+	default:
+		exit_bug("unknown task type");
+	}
+}
+
+void fastd_task_handle(void) {
+	while (ctx.task_queue && fastd_timed_out(ctx.task_queue->value))
+		handle_task();
+}
+
+void fastd_task_reschedule(fastd_task_t *task, fastd_timeout_t timeout) {
+	task->entry.value = timeout;
+	fastd_pqueue_insert(&ctx.task_queue, &task->entry);
+}
+
+bool fastd_task_timeout(fastd_timeout_t *timeout) {
+	if (!ctx.task_queue)
+		return false;
+
+	*timeout = ctx.task_queue->value;
+	return true;
+}