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Diffstat (limited to 'src/charon/processing/job_queue.h')
-rw-r--r-- | src/charon/processing/job_queue.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/charon/processing/job_queue.h b/src/charon/processing/job_queue.h new file mode 100644 index 000000000..9b58588ae --- /dev/null +++ b/src/charon/processing/job_queue.h @@ -0,0 +1,100 @@ +/** + * @file job_queue.h + * + * @brief Interface of job_queue_t. + * + */ + +/* + * Copyright (C) 2005-2006 Martin Willi + * Copyright (C) 2005 Jan Hutter + * 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_ + +typedef struct job_queue_t job_queue_t; + +#include <library.h> +#include <processing/jobs/job.h> + +/** + * @brief The job queue stores jobs, which will be processed by the thread_pool_t. + * + * Jobs are added from various sources, from the threads and + * from the event_queue_t. + * Although the job-queue is based on a linked_list_t + * all access functions are thread-save implemented. + * + * @b Constructors: + * - job_queue_create() + * + * @ingroup processing + */ +struct job_queue_t { + + /** + * @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 + * @return next job + */ + job_t *(*get) (job_queue_t *job_queue); + + /** + * @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 job job to add to the queue (job is not copied) + */ + void (*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 + */ + void (*destroy) (job_queue_t *job_queue); +}; + +/** + * @brief Creates an empty job_queue. + * + * @return job_queue_t object + * + * @ingroup processing + */ +job_queue_t *job_queue_create(void); + +#endif /*JOB_QUEUE_H_*/ |