include/workqueue.h

   1 /*
   2  * Copyright (C) 2017 Oracle.  All Rights Reserved.
   3  *
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it would be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write the Free Software Foundation,
  18  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * This code was adapted from repair/threads.h.
  21  */
  22 #ifndef _WORKQUEUE_H_
  23 #define _WORKQUEUE_H_
  24
  25 #include <pthread.h>
  26
  27 struct workqueue;
  28
  29 typedef void workqueue_func_t(struct workqueue *wq, uint32_t index, void *arg);
  30
  31 struct workqueue_item {
  32         struct workqueue        *queue;
  33         struct workqueue_item   *next;
  34         workqueue_func_t        *function;
  35         void                    *arg;
  36         uint32_t                index;
  37 };
  38
  39 struct workqueue {
  40         void                    *wq_ctx;
  41         pthread_t               *threads;
  42         struct workqueue_item   *next_item;
  43         struct workqueue_item   *last_item;
  44         pthread_mutex_t         lock;
  45         pthread_cond_t          wakeup;
  46         unsigned int            item_count;
  47         unsigned int            thread_count;
  48         bool                    terminate;
  49 };
  50
  51 int workqueue_create(struct workqueue *wq, void *wq_ctx,
  52                 unsigned int nr_workers);
  53 int workqueue_add(struct workqueue *wq, workqueue_func_t fn,
  54                 uint32_t index, void *arg);
  55 void workqueue_destroy(struct workqueue *wq);
  56
  57 #endif  /* _WORKQUEUE_H_ */