/contrib/bind9/lib/isc/nothreads/include/isc/mutex.h
https://bitbucket.org/freebsd/freebsd-head/ · C++ Header · 39 lines · 16 code · 6 blank · 17 comment · 4 complexity · a01cfaa50ad2a04fd1bec8787ce07bf4 MD5 · raw file
- /*
- * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 2000, 2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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 1.6 2007/06/19 23:47:18 tbox 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 */