184 lines
3.4 KiB
C
184 lines
3.4 KiB
C
/* $NetBSD: locks.c,v 1.2 2007/11/07 16:24:22 pooka Exp $ */
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/*
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* Copyright (c) 2007 Antti Kantee. All Rights Reserved.
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*
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* Development of this software was supported by the
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* Finnish Cultural Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/mutex.h>
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#include <sys/rwlock.h>
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#include "rump_private.h"
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#include "rumpuser.h"
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void
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mutex_init(kmutex_t *mtx, kmutex_type_t type, int ipl)
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{
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rumpuser_mutex_init(&mtx->kmtx_mtx);
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}
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void
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mutex_destroy(kmutex_t *mtx)
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{
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rumpuser_mutex_destroy(mtx->kmtx_mtx);
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}
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void
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mutex_enter(kmutex_t *mtx)
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{
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rumpuser_mutex_enter(mtx->kmtx_mtx);
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}
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int
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mutex_tryenter(kmutex_t *mtx)
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{
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int rv;
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rv = rumpuser_mutex_tryenter(mtx->kmtx_mtx);
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if (rv)
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return 0;
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else
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return 1;
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}
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void
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mutex_exit(kmutex_t *mtx)
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{
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rumpuser_mutex_exit(mtx->kmtx_mtx);
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}
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int
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mutex_owned(kmutex_t *mtx)
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{
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/* XXX */
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return 1;
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}
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/* reader/writer locks */
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void
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rw_init(krwlock_t *rw)
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{
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rumpuser_rw_init(&rw->krw_pthlock);
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}
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void
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rw_destroy(krwlock_t *rw)
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{
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rumpuser_rw_destroy(rw->krw_pthlock);
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}
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void
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rw_enter(krwlock_t *rw, const krw_t op)
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{
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rumpuser_rw_enter(rw->krw_pthlock, op == RW_WRITER);
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}
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int
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rw_tryenter(krwlock_t *rw, const krw_t op)
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{
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return rumpuser_rw_tryenter(rw->krw_pthlock, op == RW_WRITER);
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}
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void
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rw_exit(krwlock_t *rw)
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{
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rumpuser_rw_exit(rw->krw_pthlock);
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}
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/* always fails */
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int
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rw_tryupgrade(krwlock_t *rw)
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{
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return 0;
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}
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/* curriculum vitaes */
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/* forgive me for I have sinned */
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#define RUMPCV(a) ((struct rumpuser_cv *)(__UNCONST((a)->cv_wmesg)))
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void
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cv_init(kcondvar_t *cv, const char *msg)
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{
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rumpuser_cv_init((struct rumpuser_cv **)__UNCONST(&cv->cv_wmesg));
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}
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void
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cv_destroy(kcondvar_t *cv)
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{
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rumpuser_cv_destroy(RUMPCV(cv));
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}
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void
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cv_wait(kcondvar_t *cv, kmutex_t *mtx)
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{
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rumpuser_cv_wait(RUMPCV(cv), mtx->kmtx_mtx);
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}
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void
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cv_signal(kcondvar_t *cv)
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{
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rumpuser_cv_signal(RUMPCV(cv));
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}
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/* kernel biglock, only for vnode_if */
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void
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_kernel_lock(int nlocks, struct lwp *l)
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{
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KASSERT(nlocks == 1);
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mutex_enter(&rump_giantlock);
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}
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void
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_kernel_unlock(int nlocks, struct lwp *l, int *countp)
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{
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KASSERT(nlocks == 1);
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mutex_exit(&rump_giantlock);
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if (countp)
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*countp = 1;
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}
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