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bk@work.mysql.com
2000-07-31 21:29:14 +02:00
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mit-pthreads/include/pthread/prio_queue.h Executable file
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/* ==== priority.h ==========================================================
* Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano.
* 4. The name of Chris Provenzano may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
*
* $Id$
*
* Description : Priority functions.
*
* 1.00 94/09/19 proven
* -Started coding this file.
*/
#ifndef _PTHREAD_PRIO_QUEUE_H_
#define _PTHREAD_PRIO_QUEUE_H_
/*
* Static queue initialization values.
*/
#define PTHREAD_DEFAULT_PRIORITY 64
#define PTHREAD_MAX_PRIORITY 126
#define PTHREAD_MIN_PRIORITY 0
/*
* New prio_queue structures
*/
struct pthread_prio_level {
struct pthread * first;
struct pthread * last;
};
struct pthread_prio_queue {
void * data;
struct pthread * next;
struct pthread_prio_level level[PTHREAD_MAX_PRIORITY + 1];
};
/*
* New functions
*/
__BEGIN_DECLS
void pthread_prio_queue_init __P_((struct pthread_prio_queue *));
void pthread_prio_queue_enq __P_((struct pthread_prio_queue *,
struct pthread *));
struct pthread *pthread_prio_queue_deq
__P_((struct pthread_prio_queue *));
__END_DECLS
#endif