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+/**
+ * @file job_queue.h
+ *
+ * @brief Job-Queue based on linked_list_t
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef JOB_QUEUE_H_
+#define JOB_QUEUE_H_
+
+#include "../types.h"
+#include "../job.h"
+
+/**
+ * @brief Job-Queue
+ *
+ * Although the job-queue is based on a linked_list_t
+ * all access functions are thread-save implemented
+ */
+typedef struct job_queue_s job_queue_t;
+
+struct job_queue_s {
+
+ /**
+ * @brief returns number of jobs in queue
+ *
+ * @param job_queue_t calling object
+ * @returns number of items in queue
+ */
+ int (*get_count) (job_queue_t *job_queue);
+
+ /**
+ * @brief get the next job from the queue
+ *
+ * If the queue is empty, this function blocks until a job can be returned.
+ *
+ * After using, the returned job has to get destroyed by the caller.
+ *
+ * @param job_queue_t calling object
+ * @param[out] job pointer to a job pointer where to job is returned to
+ * @returns SUCCESS if succeeded, FAILED otherwise
+ */
+ status_t (*get) (job_queue_t *job_queue, job_t **job);
+
+ /**
+ * @brief adds a job to the queue
+ *
+ * This function is non blocking and adds a job_t to the list.
+ * The specific job object has to get destroyed by the thread which
+ * removes the job.
+ *
+ * @param job_queue_t calling object
+ * @param[in] job job to add to the queue (job is not copied)
+ * @returns SUCCESS if succeeded, FAILED otherwise
+ */
+ status_t (*add) (job_queue_t *job_queue, job_t *job);
+
+ /**
+ * @brief destroys a job_queue object
+ *
+ * @warning The caller of this function has to make sure
+ * that no thread is going to add or get a job from the job_queue
+ * after calling this function.
+ *
+ * @param job_queue_t calling object
+ * @returns SUCCESS if succeeded, FAILED otherwise
+ */
+ status_t (*destroy) (job_queue_t *job_queue);
+};
+
+/**
+ * @brief Creates an empty job_queue
+ *
+ * @return job_queue_t empty job_queue
+ */
+job_queue_t *job_queue_create();
+#endif /*JOB_QUEUE_H_*/