diff options
Diffstat (limited to 'lib/libthr/thread/thr_umtx.c')
| -rw-r--r-- | lib/libthr/thread/thr_umtx.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_umtx.c b/lib/libthr/thread/thr_umtx.c new file mode 100644 index 0000000..0a5ee6a --- /dev/null +++ b/lib/libthr/thread/thr_umtx.c @@ -0,0 +1,149 @@ +/* + * Copyright (c) 2005 David Xu <davidxu@freebsd.org> + * 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 unmodified, 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + * + * $FreeBSD$ + * + */ + +#include "thr_private.h" +#include "thr_umtx.h" + +void +_thr_umutex_init(struct umutex *mtx) +{ + static struct umutex default_mtx = DEFAULT_UMUTEX; + + *mtx = default_mtx; +} + +int +__thr_umutex_lock(struct umutex *mtx) +{ + if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, 0) != -1) + return 0; + return (errno); +} + +int +__thr_umutex_timedlock(struct umutex *mtx, + const struct timespec *timeout) +{ + if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && + timeout->tv_nsec <= 0))) + return (ETIMEDOUT); + if (_umtx_op(mtx, UMTX_OP_MUTEX_LOCK, 0, 0, + __DECONST(void *, timeout)) != -1) + return (0); + return (errno); +} + +int +__thr_umutex_unlock(struct umutex *mtx) +{ + if (_umtx_op(mtx, UMTX_OP_MUTEX_UNLOCK, 0, 0, 0) != -1) + return (0); + return (errno); +} + +int +__thr_umutex_trylock(struct umutex *mtx) +{ + if (_umtx_op(mtx, UMTX_OP_MUTEX_TRYLOCK, 0, 0, 0) != -1) + return (0); + return (errno); +} + +int +__thr_umutex_set_ceiling(struct umutex *mtx, uint32_t ceiling, + uint32_t *oldceiling) +{ + if (_umtx_op(mtx, UMTX_OP_SET_CEILING, ceiling, oldceiling, 0) != -1) + return (0); + return (errno); +} + +int +_thr_umtx_wait(volatile umtx_t *mtx, long id, const struct timespec *timeout) +{ + if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && + timeout->tv_nsec <= 0))) + return (ETIMEDOUT); + if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAIT, id, 0, + __DECONST(void*, timeout)) != -1) + return (0); + return (errno); +} + +int +_thr_umtx_wake(volatile umtx_t *mtx, int nr_wakeup) +{ + if (_umtx_op(__DEVOLATILE(void *, mtx), UMTX_OP_WAKE, + nr_wakeup, 0, 0) != -1) + return (0); + return (errno); +} + +void +_thr_ucond_init(struct ucond *cv) +{ + bzero(cv, sizeof(struct ucond)); +} + +int +_thr_ucond_wait(struct ucond *cv, struct umutex *m, + const struct timespec *timeout, int check_unparking) +{ + if (timeout && (timeout->tv_sec < 0 || (timeout->tv_sec == 0 && + timeout->tv_nsec <= 0))) { + __thr_umutex_unlock(m); + return (ETIMEDOUT); + } + if (_umtx_op(cv, UMTX_OP_CV_WAIT, + check_unparking ? UMTX_CHECK_UNPARKING : 0, + m, __DECONST(void*, timeout)) != -1) { + return (0); + } + return (errno); +} + +int +_thr_ucond_signal(struct ucond *cv) +{ + if (!cv->c_has_waiters) + return (0); + if (_umtx_op(cv, UMTX_OP_CV_SIGNAL, 0, NULL, NULL) != -1) + return (0); + return (errno); +} + +int +_thr_ucond_broadcast(struct ucond *cv) +{ + if (!cv->c_has_waiters) + return (0); + if (_umtx_op(cv, UMTX_OP_CV_BROADCAST, 0, NULL, NULL) != -1) + return (0); + return (errno); +} |
