vkernel - more crit section work to avoid pthread reentrancy.

[dragonfly.git] / sys / platform / vkernel / include / cothread.h

/*
 * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 *
 * 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. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``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 THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
 *
 * $DragonFly: src/sys/platform/vkernel/include/cothread.h,v 1.2 2008/03/27 04:28:07 dillon Exp $
 */

#ifndef _MACHINE_COTHREAD_H_
#define _MACHINE_COTHREAD_H_

#include <pthread.h>

struct cothread {
	pthread_t	pthr;
	pthread_t	pintr;
	void		*arg;
	void		(*thr_func)(struct cothread *);
	void		(*thr_intr)(struct cothread *);
	void		*intr_id;
	pthread_mutex_t	mutex;
	pthread_cond_t	cond;
};

typedef struct cothread *cothread_t;

cothread_t cothread_create(void (*thr_func)(cothread_t cotd),
			   void (*thr_intr)(cothread_t cotd),
			   void *arg, const  char *name);
void cothread_delete(cothread_t *cotdp);
void cothread_intr(cothread_t cotd);
void cothread_signal(cothread_t cotd);
void cothread_wait(cothread_t cotd);
void cothread_lock(cothread_t cotd, int is_cotd);
void cothread_unlock(cothread_t cotd, int is_cotd);

#endif