Symaptic: os/ossrv/genericopenlibs/openenvcore/libc/include/spinlock.h@260cb5ec6c19

     1 /*

     2  * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.

     3  * All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  * 1. Redistributions of source code must retain the above copyright

     9  *    notice, this list of conditions and the following disclaimer.

    10  * 2. Redistributions in binary form must reproduce the above copyright

    11  *    notice, this list of conditions and the following disclaimer in the

    12  *    documentation and/or other materials provided with the distribution.

    13  * 4. Neither the name of the author nor the names of any co-contributors

    14  *    may be used to endorse or promote products derived from this software

    15  *    without specific prior written permission.

    16  *

    17  * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND

    18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

    21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

    22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

    23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

    25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

    26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

    27  * SUCH DAMAGE.

    28  *

    29  * $FreeBSD: src/lib/libc/include/spinlock.h,v 1.7 2003/11/05 18:17:30 deischen Exp $

    30  *

    31  * Lock definitions used in both libc and libpthread.

    32  *

    33  */

    35 #ifndef _SPINLOCK_H_

    36 #define _SPINLOCK_H_

    37 #include <sys/cdefs.h>

    38 #include <sys/types.h>

    40 /*

    41  * Lock structure with room for debugging information.

    42  */

    43 struct _spinlock {

    44 	volatile long	access_lock;

    45 	volatile long	lock_owner;

    46 	volatile char	*fname;

    47 	volatile int	lineno;

    48 };

    49 typedef struct _spinlock spinlock_t;

    51 #define	_SPINLOCK_INITIALIZER	{ 0, 0, 0, 0 }

    53 #define _SPINUNLOCK(_lck)	_spinunlock(_lck);

    54 #ifdef	_LOCK_DEBUG

    55 #define	_SPINLOCK(_lck)		_spinlock_debug(_lck, __FILE__, __LINE__)

    56 #else

    57 #define	_SPINLOCK(_lck)		_spinlock(_lck)

    58 #endif

    60 /*

    61  * Thread function prototype definitions:

    62  */

    63 __BEGIN_DECLS

    64 long	_atomic_lock(volatile long *);

    65 void	_spinlock(spinlock_t *);

    66 void	_spinunlock(spinlock_t *);

    67 void	_spinlock_debug(spinlock_t *, char *, int);

    68 __END_DECLS

    70 #endif /* _SPINLOCK_H_ */

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--