40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2000, 2001 Internet Software Consortium.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
|
|
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
|
|
* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
|
|
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
|
|
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
|
|
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
|
|
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
/* $Id: mutex.h,v 1.3 2001/01/09 21:57:55 bwelling Exp $ */
|
|
|
|
#ifndef ISC_MUTEX_H
|
|
#define ISC_MUTEX_H 1
|
|
|
|
#include <isc/result.h> /* for ISC_R_ codes */
|
|
|
|
typedef int isc_mutex_t;
|
|
|
|
#define isc_mutex_init(mp) \
|
|
(*(mp) = 0, ISC_R_SUCCESS)
|
|
#define isc_mutex_lock(mp) \
|
|
((*(mp))++ == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
|
|
#define isc_mutex_unlock(mp) \
|
|
(--(*(mp)) == 0 ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
|
|
#define isc_mutex_trylock(mp) \
|
|
(*(mp) == 0 ? ((*(mp))++, ISC_R_SUCCESS) : ISC_R_LOCKBUSY)
|
|
#define isc_mutex_destroy(mp) \
|
|
(*(mp) == 0 ? (*(mp) = -1, ISC_R_SUCCESS) : ISC_R_UNEXPECTED)
|
|
#define isc_mutex_stats(fp)
|
|
|
|
#endif /* ISC_MUTEX_H */
|