locks.c revision 1.2.4.3
1 1.2.4.3 yamt /* $NetBSD: locks.c,v 1.2.4.3 2007/12/07 17:34:47 yamt Exp $ */ 2 1.2.4.2 yamt 3 1.2.4.2 yamt /* 4 1.2.4.2 yamt * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 1.2.4.2 yamt * 6 1.2.4.2 yamt * Development of this software was supported by the 7 1.2.4.2 yamt * Finnish Cultural Foundation. 8 1.2.4.2 yamt * 9 1.2.4.2 yamt * Redistribution and use in source and binary forms, with or without 10 1.2.4.2 yamt * modification, are permitted provided that the following conditions 11 1.2.4.2 yamt * are met: 12 1.2.4.2 yamt * 1. Redistributions of source code must retain the above copyright 13 1.2.4.2 yamt * notice, this list of conditions and the following disclaimer. 14 1.2.4.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.4.2 yamt * notice, this list of conditions and the following disclaimer in the 16 1.2.4.2 yamt * documentation and/or other materials provided with the distribution. 17 1.2.4.2 yamt * 18 1.2.4.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 1.2.4.2 yamt * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 1.2.4.2 yamt * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 1.2.4.2 yamt * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 1.2.4.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.2.4.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.2.4.2 yamt * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.2.4.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 1.2.4.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 1.2.4.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 1.2.4.2 yamt * SUCH DAMAGE. 29 1.2.4.2 yamt */ 30 1.2.4.2 yamt 31 1.2.4.2 yamt #include <sys/param.h> 32 1.2.4.2 yamt #include <sys/mutex.h> 33 1.2.4.2 yamt #include <sys/rwlock.h> 34 1.2.4.2 yamt 35 1.2.4.2 yamt #include "rump_private.h" 36 1.2.4.2 yamt 37 1.2.4.2 yamt #include "rumpuser.h" 38 1.2.4.2 yamt 39 1.2.4.2 yamt void 40 1.2.4.2 yamt mutex_init(kmutex_t *mtx, kmutex_type_t type, int ipl) 41 1.2.4.2 yamt { 42 1.2.4.2 yamt 43 1.2.4.2 yamt rumpuser_mutex_init(&mtx->kmtx_mtx); 44 1.2.4.2 yamt } 45 1.2.4.2 yamt 46 1.2.4.2 yamt void 47 1.2.4.2 yamt mutex_destroy(kmutex_t *mtx) 48 1.2.4.2 yamt { 49 1.2.4.2 yamt 50 1.2.4.2 yamt rumpuser_mutex_destroy(mtx->kmtx_mtx); 51 1.2.4.2 yamt } 52 1.2.4.2 yamt 53 1.2.4.2 yamt void 54 1.2.4.2 yamt mutex_enter(kmutex_t *mtx) 55 1.2.4.2 yamt { 56 1.2.4.2 yamt 57 1.2.4.2 yamt rumpuser_mutex_enter(mtx->kmtx_mtx); 58 1.2.4.2 yamt } 59 1.2.4.2 yamt 60 1.2.4.2 yamt int 61 1.2.4.2 yamt mutex_tryenter(kmutex_t *mtx) 62 1.2.4.2 yamt { 63 1.2.4.2 yamt int rv; 64 1.2.4.2 yamt 65 1.2.4.2 yamt rv = rumpuser_mutex_tryenter(mtx->kmtx_mtx); 66 1.2.4.2 yamt if (rv) 67 1.2.4.2 yamt return 0; 68 1.2.4.2 yamt else 69 1.2.4.2 yamt return 1; 70 1.2.4.2 yamt } 71 1.2.4.2 yamt 72 1.2.4.2 yamt void 73 1.2.4.2 yamt mutex_exit(kmutex_t *mtx) 74 1.2.4.2 yamt { 75 1.2.4.2 yamt 76 1.2.4.2 yamt rumpuser_mutex_exit(mtx->kmtx_mtx); 77 1.2.4.2 yamt } 78 1.2.4.2 yamt 79 1.2.4.2 yamt int 80 1.2.4.2 yamt mutex_owned(kmutex_t *mtx) 81 1.2.4.2 yamt { 82 1.2.4.2 yamt 83 1.2.4.2 yamt /* XXX */ 84 1.2.4.2 yamt return 1; 85 1.2.4.2 yamt } 86 1.2.4.2 yamt 87 1.2.4.2 yamt /* reader/writer locks */ 88 1.2.4.2 yamt 89 1.2.4.2 yamt void 90 1.2.4.2 yamt rw_init(krwlock_t *rw) 91 1.2.4.2 yamt { 92 1.2.4.2 yamt 93 1.2.4.2 yamt rumpuser_rw_init(&rw->krw_pthlock); 94 1.2.4.2 yamt } 95 1.2.4.2 yamt 96 1.2.4.2 yamt void 97 1.2.4.2 yamt rw_destroy(krwlock_t *rw) 98 1.2.4.2 yamt { 99 1.2.4.2 yamt 100 1.2.4.2 yamt rumpuser_rw_destroy(rw->krw_pthlock); 101 1.2.4.2 yamt } 102 1.2.4.2 yamt 103 1.2.4.2 yamt void 104 1.2.4.2 yamt rw_enter(krwlock_t *rw, const krw_t op) 105 1.2.4.2 yamt { 106 1.2.4.2 yamt 107 1.2.4.2 yamt rumpuser_rw_enter(rw->krw_pthlock, op == RW_WRITER); 108 1.2.4.2 yamt } 109 1.2.4.2 yamt 110 1.2.4.2 yamt int 111 1.2.4.2 yamt rw_tryenter(krwlock_t *rw, const krw_t op) 112 1.2.4.2 yamt { 113 1.2.4.2 yamt 114 1.2.4.2 yamt return rumpuser_rw_tryenter(rw->krw_pthlock, op == RW_WRITER); 115 1.2.4.2 yamt } 116 1.2.4.2 yamt 117 1.2.4.2 yamt void 118 1.2.4.2 yamt rw_exit(krwlock_t *rw) 119 1.2.4.2 yamt { 120 1.2.4.2 yamt 121 1.2.4.2 yamt rumpuser_rw_exit(rw->krw_pthlock); 122 1.2.4.2 yamt } 123 1.2.4.2 yamt 124 1.2.4.2 yamt /* always fails */ 125 1.2.4.2 yamt int 126 1.2.4.2 yamt rw_tryupgrade(krwlock_t *rw) 127 1.2.4.2 yamt { 128 1.2.4.2 yamt 129 1.2.4.2 yamt return 0; 130 1.2.4.2 yamt } 131 1.2.4.2 yamt 132 1.2.4.2 yamt /* curriculum vitaes */ 133 1.2.4.2 yamt 134 1.2.4.2 yamt /* forgive me for I have sinned */ 135 1.2.4.2 yamt #define RUMPCV(a) ((struct rumpuser_cv *)(__UNCONST((a)->cv_wmesg))) 136 1.2.4.2 yamt 137 1.2.4.2 yamt void 138 1.2.4.2 yamt cv_init(kcondvar_t *cv, const char *msg) 139 1.2.4.2 yamt { 140 1.2.4.2 yamt 141 1.2.4.2 yamt rumpuser_cv_init((struct rumpuser_cv **)__UNCONST(&cv->cv_wmesg)); 142 1.2.4.2 yamt } 143 1.2.4.2 yamt 144 1.2.4.2 yamt void 145 1.2.4.2 yamt cv_destroy(kcondvar_t *cv) 146 1.2.4.2 yamt { 147 1.2.4.2 yamt 148 1.2.4.2 yamt rumpuser_cv_destroy(RUMPCV(cv)); 149 1.2.4.2 yamt } 150 1.2.4.2 yamt 151 1.2.4.2 yamt void 152 1.2.4.2 yamt cv_wait(kcondvar_t *cv, kmutex_t *mtx) 153 1.2.4.2 yamt { 154 1.2.4.2 yamt 155 1.2.4.2 yamt rumpuser_cv_wait(RUMPCV(cv), mtx->kmtx_mtx); 156 1.2.4.2 yamt } 157 1.2.4.2 yamt 158 1.2.4.3 yamt int 159 1.2.4.3 yamt cv_timedwait(kcondvar_t *cv, kmutex_t *mtx, int ticks) 160 1.2.4.3 yamt { 161 1.2.4.3 yamt extern int hz; 162 1.2.4.3 yamt 163 1.2.4.3 yamt KASSERT(hz == 100); 164 1.2.4.3 yamt return rumpuser_cv_timedwait(RUMPCV(cv), mtx->kmtx_mtx, ticks); 165 1.2.4.3 yamt } 166 1.2.4.3 yamt 167 1.2.4.2 yamt void 168 1.2.4.2 yamt cv_signal(kcondvar_t *cv) 169 1.2.4.2 yamt { 170 1.2.4.2 yamt 171 1.2.4.2 yamt rumpuser_cv_signal(RUMPCV(cv)); 172 1.2.4.2 yamt } 173 1.2.4.2 yamt 174 1.2.4.3 yamt void 175 1.2.4.3 yamt cv_broadcast(kcondvar_t *cv) 176 1.2.4.3 yamt { 177 1.2.4.3 yamt 178 1.2.4.3 yamt rumpuser_cv_broadcast(RUMPCV(cv)); 179 1.2.4.3 yamt } 180 1.2.4.3 yamt 181 1.2.4.2 yamt /* kernel biglock, only for vnode_if */ 182 1.2.4.2 yamt 183 1.2.4.2 yamt void 184 1.2.4.2 yamt _kernel_lock(int nlocks, struct lwp *l) 185 1.2.4.2 yamt { 186 1.2.4.2 yamt 187 1.2.4.2 yamt KASSERT(nlocks == 1); 188 1.2.4.2 yamt mutex_enter(&rump_giantlock); 189 1.2.4.2 yamt } 190 1.2.4.2 yamt 191 1.2.4.2 yamt void 192 1.2.4.2 yamt _kernel_unlock(int nlocks, struct lwp *l, int *countp) 193 1.2.4.2 yamt { 194 1.2.4.2 yamt 195 1.2.4.2 yamt KASSERT(nlocks == 1); 196 1.2.4.2 yamt mutex_exit(&rump_giantlock); 197 1.2.4.2 yamt if (countp) 198 1.2.4.2 yamt *countp = 1; 199 1.2.4.2 yamt } 200
Indexes created Tue Sep 30 20:09:53 GMT 2025