exec/wthread.h

   1 /*
   2  * Copyright (c) 2005 MontaVista Software, Inc.
   3  *
   4  * All rights reserved.
   5  *
   6  * Author: Steven Dake (sdake@mvista.com)
   7  *
   8  * This software licensed under BSD license, the text of which follows:
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions are met:
  12  *
  13  * - Redistributions of source code must retain the above copyright notice,
  14  *   this list of conditions and the following disclaimer.
  15  * - Redistributions in binary form must reproduce the above copyright notice,
  16  *   this list of conditions and the following disclaimer in the documentation
  17  *   and/or other materials provided with the distribution.
  18  * - Neither the name of the MontaVista Software, Inc. nor the names of its
  19  *   contributors may be used to endorse or promote products derived from this
  20  *   software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  32  * THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #ifndef CONFIG_WTHREAD_H_DEFINED
  36 #define CONFIG_WTHREAD_H_DEFINED
  37
  38 struct worker_thread_group {
  39         int threadcount;
  40         int last_scheduled;
  41         struct worker_thread *threads;
  42         void (*worker_fn) (void *thread_state, void *work_item);
  43 };
  44
  45 extern int worker_thread_group_init (
  46         struct worker_thread_group *worker_thread_group,
  47         int threads,
  48         int items_max,
  49         int item_size,
  50         int thread_state_size,
  51         void (*thread_state_constructor)(void *),
  52         void (*worker_fn)(void *thread_state, void *work_item));
  53
  54 extern int worker_thread_group_work_add (
  55         struct worker_thread_group *worker_thread_group,
  56         void *item);
  57
  58 extern void worker_thread_group_wait (
  59         struct worker_thread_group *worker_thread_group);
  60
  61 extern void worker_thread_group_exit (
  62         struct worker_thread_group *worker_thread_group);
  63
  64 extern void worker_thread_group_atsegv (
  65         struct worker_thread_group *worker_thread_group);
  66
  67 #endif /* WTHREAD_H_DEFINED */