locks.c revision 1.2.2.3
1 1.2.2.2 bouyer /* $NetBSD: locks.c,v 1.2.2.3 2007/11/18 19:35:55 bouyer Exp $ */ 2 1.2.2.2 bouyer 3 1.2.2.2 bouyer /* 4 1.2.2.2 bouyer * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 1.2.2.2 bouyer * 6 1.2.2.2 bouyer * Development of this software was supported by the 7 1.2.2.2 bouyer * Finnish Cultural Foundation. 8 1.2.2.2 bouyer * 9 1.2.2.2 bouyer * Redistribution and use in source and binary forms, with or without 10 1.2.2.2 bouyer * modification, are permitted provided that the following conditions 11 1.2.2.2 bouyer * are met: 12 1.2.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 13 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer. 14 1.2.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 16 1.2.2.2 bouyer * documentation and/or other materials provided with the distribution. 17 1.2.2.2 bouyer * 18 1.2.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 1.2.2.2 bouyer * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 1.2.2.2 bouyer * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 1.2.2.2 bouyer * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 1.2.2.2 bouyer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.2.2.2 bouyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.2.2.2 bouyer * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.2.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 1.2.2.2 bouyer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 1.2.2.2 bouyer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 1.2.2.2 bouyer * SUCH DAMAGE. 29 1.2.2.2 bouyer */ 30 1.2.2.2 bouyer 31 1.2.2.2 bouyer #include <sys/param.h> 32 1.2.2.2 bouyer #include <sys/mutex.h> 33 1.2.2.2 bouyer #include <sys/rwlock.h> 34 1.2.2.2 bouyer 35 1.2.2.2 bouyer #include "rump_private.h" 36 1.2.2.2 bouyer 37 1.2.2.2 bouyer #include "rumpuser.h" 38 1.2.2.2 bouyer 39 1.2.2.2 bouyer void 40 1.2.2.2 bouyer mutex_init(kmutex_t *mtx, kmutex_type_t type, int ipl) 41 1.2.2.2 bouyer { 42 1.2.2.2 bouyer 43 1.2.2.2 bouyer rumpuser_mutex_init(&mtx->kmtx_mtx); 44 1.2.2.2 bouyer } 45 1.2.2.2 bouyer 46 1.2.2.2 bouyer void 47 1.2.2.2 bouyer mutex_destroy(kmutex_t *mtx) 48 1.2.2.2 bouyer { 49 1.2.2.2 bouyer 50 1.2.2.2 bouyer rumpuser_mutex_destroy(mtx->kmtx_mtx); 51 1.2.2.2 bouyer } 52 1.2.2.2 bouyer 53 1.2.2.2 bouyer void 54 1.2.2.2 bouyer mutex_enter(kmutex_t *mtx) 55 1.2.2.2 bouyer { 56 1.2.2.2 bouyer 57 1.2.2.2 bouyer rumpuser_mutex_enter(mtx->kmtx_mtx); 58 1.2.2.2 bouyer } 59 1.2.2.2 bouyer 60 1.2.2.2 bouyer int 61 1.2.2.2 bouyer mutex_tryenter(kmutex_t *mtx) 62 1.2.2.2 bouyer { 63 1.2.2.2 bouyer int rv; 64 1.2.2.2 bouyer 65 1.2.2.2 bouyer rv = rumpuser_mutex_tryenter(mtx->kmtx_mtx); 66 1.2.2.2 bouyer if (rv) 67 1.2.2.2 bouyer return 0; 68 1.2.2.2 bouyer else 69 1.2.2.2 bouyer return 1; 70 1.2.2.2 bouyer } 71 1.2.2.2 bouyer 72 1.2.2.2 bouyer void 73 1.2.2.2 bouyer mutex_exit(kmutex_t *mtx) 74 1.2.2.2 bouyer { 75 1.2.2.2 bouyer 76 1.2.2.2 bouyer rumpuser_mutex_exit(mtx->kmtx_mtx); 77 1.2.2.2 bouyer } 78 1.2.2.2 bouyer 79 1.2.2.2 bouyer int 80 1.2.2.2 bouyer mutex_owned(kmutex_t *mtx) 81 1.2.2.2 bouyer { 82 1.2.2.2 bouyer 83 1.2.2.2 bouyer /* XXX */ 84 1.2.2.2 bouyer return 1; 85 1.2.2.2 bouyer } 86 1.2.2.2 bouyer 87 1.2.2.2 bouyer /* reader/writer locks */ 88 1.2.2.2 bouyer 89 1.2.2.2 bouyer void 90 1.2.2.2 bouyer rw_init(krwlock_t *rw) 91 1.2.2.2 bouyer { 92 1.2.2.2 bouyer 93 1.2.2.2 bouyer rumpuser_rw_init(&rw->krw_pthlock); 94 1.2.2.2 bouyer } 95 1.2.2.2 bouyer 96 1.2.2.2 bouyer void 97 1.2.2.2 bouyer rw_destroy(krwlock_t *rw) 98 1.2.2.2 bouyer { 99 1.2.2.2 bouyer 100 1.2.2.2 bouyer rumpuser_rw_destroy(rw->krw_pthlock); 101 1.2.2.2 bouyer } 102 1.2.2.2 bouyer 103 1.2.2.2 bouyer void 104 1.2.2.2 bouyer rw_enter(krwlock_t *rw, const krw_t op) 105 1.2.2.2 bouyer { 106 1.2.2.2 bouyer 107 1.2.2.2 bouyer rumpuser_rw_enter(rw->krw_pthlock, op == RW_WRITER); 108 1.2.2.2 bouyer } 109 1.2.2.2 bouyer 110 1.2.2.2 bouyer int 111 1.2.2.2 bouyer rw_tryenter(krwlock_t *rw, const krw_t op) 112 1.2.2.2 bouyer { 113 1.2.2.2 bouyer 114 1.2.2.2 bouyer return rumpuser_rw_tryenter(rw->krw_pthlock, op == RW_WRITER); 115 1.2.2.2 bouyer } 116 1.2.2.2 bouyer 117 1.2.2.2 bouyer void 118 1.2.2.2 bouyer rw_exit(krwlock_t *rw) 119 1.2.2.2 bouyer { 120 1.2.2.2 bouyer 121 1.2.2.2 bouyer rumpuser_rw_exit(rw->krw_pthlock); 122 1.2.2.2 bouyer } 123 1.2.2.2 bouyer 124 1.2.2.2 bouyer /* always fails */ 125 1.2.2.2 bouyer int 126 1.2.2.2 bouyer rw_tryupgrade(krwlock_t *rw) 127 1.2.2.2 bouyer { 128 1.2.2.2 bouyer 129 1.2.2.2 bouyer return 0; 130 1.2.2.2 bouyer } 131 1.2.2.2 bouyer 132 1.2.2.2 bouyer /* curriculum vitaes */ 133 1.2.2.2 bouyer 134 1.2.2.2 bouyer /* forgive me for I have sinned */ 135 1.2.2.2 bouyer #define RUMPCV(a) ((struct rumpuser_cv *)(__UNCONST((a)->cv_wmesg))) 136 1.2.2.2 bouyer 137 1.2.2.2 bouyer void 138 1.2.2.2 bouyer cv_init(kcondvar_t *cv, const char *msg) 139 1.2.2.2 bouyer { 140 1.2.2.2 bouyer 141 1.2.2.2 bouyer rumpuser_cv_init((struct rumpuser_cv **)__UNCONST(&cv->cv_wmesg)); 142 1.2.2.2 bouyer } 143 1.2.2.2 bouyer 144 1.2.2.2 bouyer void 145 1.2.2.2 bouyer cv_destroy(kcondvar_t *cv) 146 1.2.2.2 bouyer { 147 1.2.2.2 bouyer 148 1.2.2.2 bouyer rumpuser_cv_destroy(RUMPCV(cv)); 149 1.2.2.2 bouyer } 150 1.2.2.2 bouyer 151 1.2.2.2 bouyer void 152 1.2.2.2 bouyer cv_wait(kcondvar_t *cv, kmutex_t *mtx) 153 1.2.2.2 bouyer { 154 1.2.2.2 bouyer 155 1.2.2.2 bouyer rumpuser_cv_wait(RUMPCV(cv), mtx->kmtx_mtx); 156 1.2.2.2 bouyer } 157 1.2.2.2 bouyer 158 1.2.2.3 bouyer int 159 1.2.2.3 bouyer cv_timedwait(kcondvar_t *cv, kmutex_t *mtx, int ticks) 160 1.2.2.3 bouyer { 161 1.2.2.3 bouyer extern int hz; 162 1.2.2.3 bouyer 163 1.2.2.3 bouyer KASSERT(hz == 100); 164 1.2.2.3 bouyer return rumpuser_cv_timedwait(RUMPCV(cv), mtx->kmtx_mtx, ticks); 165 1.2.2.3 bouyer } 166 1.2.2.3 bouyer 167 1.2.2.2 bouyer void 168 1.2.2.2 bouyer cv_signal(kcondvar_t *cv) 169 1.2.2.2 bouyer { 170 1.2.2.2 bouyer 171 1.2.2.2 bouyer rumpuser_cv_signal(RUMPCV(cv)); 172 1.2.2.2 bouyer } 173 1.2.2.2 bouyer 174 1.2.2.2 bouyer /* kernel biglock, only for vnode_if */ 175 1.2.2.2 bouyer 176 1.2.2.2 bouyer void 177 1.2.2.2 bouyer _kernel_lock(int nlocks, struct lwp *l) 178 1.2.2.2 bouyer { 179 1.2.2.2 bouyer 180 1.2.2.2 bouyer KASSERT(nlocks == 1); 181 1.2.2.2 bouyer mutex_enter(&rump_giantlock); 182 1.2.2.2 bouyer } 183 1.2.2.2 bouyer 184 1.2.2.2 bouyer void 185 1.2.2.2 bouyer _kernel_unlock(int nlocks, struct lwp *l, int *countp) 186 1.2.2.2 bouyer { 187 1.2.2.2 bouyer 188 1.2.2.2 bouyer KASSERT(nlocks == 1); 189 1.2.2.2 bouyer mutex_exit(&rump_giantlock); 190 1.2.2.2 bouyer if (countp) 191 1.2.2.2 bouyer *countp = 1; 192 1.2.2.2 bouyer } 193
Indexes created Tue Sep 30 11:09:46 GMT 2025