locks.c revision 1.2.4.5
1 1.2.4.5 yamt /* $NetBSD: locks.c,v 1.2.4.5 2008/02/04 09:24:51 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 1.2.4.4 yamt void 61 1.2.4.4 yamt mutex_spin_enter(kmutex_t *mtx) 62 1.2.4.4 yamt { 63 1.2.4.4 yamt 64 1.2.4.4 yamt mutex_enter(mtx); 65 1.2.4.4 yamt } 66 1.2.4.4 yamt 67 1.2.4.2 yamt int 68 1.2.4.2 yamt mutex_tryenter(kmutex_t *mtx) 69 1.2.4.2 yamt { 70 1.2.4.2 yamt int rv; 71 1.2.4.2 yamt 72 1.2.4.2 yamt rv = rumpuser_mutex_tryenter(mtx->kmtx_mtx); 73 1.2.4.2 yamt if (rv) 74 1.2.4.2 yamt return 0; 75 1.2.4.2 yamt else 76 1.2.4.2 yamt return 1; 77 1.2.4.2 yamt } 78 1.2.4.2 yamt 79 1.2.4.2 yamt void 80 1.2.4.2 yamt mutex_exit(kmutex_t *mtx) 81 1.2.4.2 yamt { 82 1.2.4.2 yamt 83 1.2.4.2 yamt rumpuser_mutex_exit(mtx->kmtx_mtx); 84 1.2.4.2 yamt } 85 1.2.4.2 yamt 86 1.2.4.4 yamt void 87 1.2.4.4 yamt mutex_spin_exit(kmutex_t *mtx) 88 1.2.4.4 yamt { 89 1.2.4.4 yamt 90 1.2.4.4 yamt mutex_exit(mtx); 91 1.2.4.4 yamt } 92 1.2.4.4 yamt 93 1.2.4.2 yamt int 94 1.2.4.2 yamt mutex_owned(kmutex_t *mtx) 95 1.2.4.2 yamt { 96 1.2.4.2 yamt 97 1.2.4.5 yamt return rumpuser_mutex_held(mtx->kmtx_mtx); 98 1.2.4.2 yamt } 99 1.2.4.2 yamt 100 1.2.4.2 yamt /* reader/writer locks */ 101 1.2.4.2 yamt 102 1.2.4.2 yamt void 103 1.2.4.2 yamt rw_init(krwlock_t *rw) 104 1.2.4.2 yamt { 105 1.2.4.2 yamt 106 1.2.4.2 yamt rumpuser_rw_init(&rw->krw_pthlock); 107 1.2.4.2 yamt } 108 1.2.4.2 yamt 109 1.2.4.2 yamt void 110 1.2.4.2 yamt rw_destroy(krwlock_t *rw) 111 1.2.4.2 yamt { 112 1.2.4.2 yamt 113 1.2.4.2 yamt rumpuser_rw_destroy(rw->krw_pthlock); 114 1.2.4.2 yamt } 115 1.2.4.2 yamt 116 1.2.4.2 yamt void 117 1.2.4.2 yamt rw_enter(krwlock_t *rw, const krw_t op) 118 1.2.4.2 yamt { 119 1.2.4.2 yamt 120 1.2.4.2 yamt rumpuser_rw_enter(rw->krw_pthlock, op == RW_WRITER); 121 1.2.4.2 yamt } 122 1.2.4.2 yamt 123 1.2.4.2 yamt int 124 1.2.4.2 yamt rw_tryenter(krwlock_t *rw, const krw_t op) 125 1.2.4.2 yamt { 126 1.2.4.2 yamt 127 1.2.4.2 yamt return rumpuser_rw_tryenter(rw->krw_pthlock, op == RW_WRITER); 128 1.2.4.2 yamt } 129 1.2.4.2 yamt 130 1.2.4.2 yamt void 131 1.2.4.2 yamt rw_exit(krwlock_t *rw) 132 1.2.4.2 yamt { 133 1.2.4.2 yamt 134 1.2.4.2 yamt rumpuser_rw_exit(rw->krw_pthlock); 135 1.2.4.2 yamt } 136 1.2.4.2 yamt 137 1.2.4.2 yamt /* always fails */ 138 1.2.4.2 yamt int 139 1.2.4.2 yamt rw_tryupgrade(krwlock_t *rw) 140 1.2.4.2 yamt { 141 1.2.4.2 yamt 142 1.2.4.2 yamt return 0; 143 1.2.4.2 yamt } 144 1.2.4.2 yamt 145 1.2.4.4 yamt int 146 1.2.4.4 yamt rw_write_held(krwlock_t *rw) 147 1.2.4.4 yamt { 148 1.2.4.4 yamt 149 1.2.4.5 yamt return rumpuser_rw_wrheld(rw->krw_pthlock); 150 1.2.4.5 yamt } 151 1.2.4.5 yamt 152 1.2.4.5 yamt int 153 1.2.4.5 yamt rw_read_held(krwlock_t *rw) 154 1.2.4.5 yamt { 155 1.2.4.5 yamt 156 1.2.4.5 yamt return rumpuser_rw_rdheld(rw->krw_pthlock); 157 1.2.4.5 yamt } 158 1.2.4.5 yamt 159 1.2.4.5 yamt int 160 1.2.4.5 yamt rw_lock_held(krwlock_t *rw) 161 1.2.4.5 yamt { 162 1.2.4.5 yamt 163 1.2.4.5 yamt return rumpuser_rw_held(rw->krw_pthlock); 164 1.2.4.4 yamt } 165 1.2.4.4 yamt 166 1.2.4.2 yamt /* curriculum vitaes */ 167 1.2.4.2 yamt 168 1.2.4.2 yamt /* forgive me for I have sinned */ 169 1.2.4.2 yamt #define RUMPCV(a) ((struct rumpuser_cv *)(__UNCONST((a)->cv_wmesg))) 170 1.2.4.2 yamt 171 1.2.4.2 yamt void 172 1.2.4.2 yamt cv_init(kcondvar_t *cv, const char *msg) 173 1.2.4.2 yamt { 174 1.2.4.2 yamt 175 1.2.4.2 yamt rumpuser_cv_init((struct rumpuser_cv **)__UNCONST(&cv->cv_wmesg)); 176 1.2.4.2 yamt } 177 1.2.4.2 yamt 178 1.2.4.2 yamt void 179 1.2.4.2 yamt cv_destroy(kcondvar_t *cv) 180 1.2.4.2 yamt { 181 1.2.4.2 yamt 182 1.2.4.2 yamt rumpuser_cv_destroy(RUMPCV(cv)); 183 1.2.4.2 yamt } 184 1.2.4.2 yamt 185 1.2.4.2 yamt void 186 1.2.4.2 yamt cv_wait(kcondvar_t *cv, kmutex_t *mtx) 187 1.2.4.2 yamt { 188 1.2.4.2 yamt 189 1.2.4.2 yamt rumpuser_cv_wait(RUMPCV(cv), mtx->kmtx_mtx); 190 1.2.4.2 yamt } 191 1.2.4.2 yamt 192 1.2.4.3 yamt int 193 1.2.4.4 yamt cv_wait_sig(kcondvar_t *cv, kmutex_t *mtx) 194 1.2.4.4 yamt { 195 1.2.4.4 yamt 196 1.2.4.4 yamt rumpuser_cv_wait(RUMPCV(cv), mtx->kmtx_mtx); 197 1.2.4.4 yamt return 0; 198 1.2.4.4 yamt } 199 1.2.4.4 yamt 200 1.2.4.4 yamt int 201 1.2.4.3 yamt cv_timedwait(kcondvar_t *cv, kmutex_t *mtx, int ticks) 202 1.2.4.3 yamt { 203 1.2.4.3 yamt extern int hz; 204 1.2.4.3 yamt 205 1.2.4.5 yamt if (ticks == 0) { 206 1.2.4.5 yamt cv_wait(cv, mtx); 207 1.2.4.5 yamt return 0; 208 1.2.4.5 yamt } else { 209 1.2.4.5 yamt KASSERT(hz == 100); 210 1.2.4.5 yamt return rumpuser_cv_timedwait(RUMPCV(cv), mtx->kmtx_mtx, ticks); 211 1.2.4.5 yamt } 212 1.2.4.3 yamt } 213 1.2.4.3 yamt 214 1.2.4.4 yamt int 215 1.2.4.4 yamt cv_timedwait_sig(kcondvar_t *cv, kmutex_t *mtx, int ticks) 216 1.2.4.4 yamt { 217 1.2.4.4 yamt 218 1.2.4.5 yamt return cv_timedwait(cv, mtx, ticks); 219 1.2.4.4 yamt } 220 1.2.4.4 yamt 221 1.2.4.2 yamt void 222 1.2.4.2 yamt cv_signal(kcondvar_t *cv) 223 1.2.4.2 yamt { 224 1.2.4.2 yamt 225 1.2.4.2 yamt rumpuser_cv_signal(RUMPCV(cv)); 226 1.2.4.2 yamt } 227 1.2.4.2 yamt 228 1.2.4.3 yamt void 229 1.2.4.3 yamt cv_broadcast(kcondvar_t *cv) 230 1.2.4.3 yamt { 231 1.2.4.3 yamt 232 1.2.4.3 yamt rumpuser_cv_broadcast(RUMPCV(cv)); 233 1.2.4.3 yamt } 234 1.2.4.3 yamt 235 1.2.4.2 yamt /* kernel biglock, only for vnode_if */ 236 1.2.4.2 yamt 237 1.2.4.2 yamt void 238 1.2.4.2 yamt _kernel_lock(int nlocks, struct lwp *l) 239 1.2.4.2 yamt { 240 1.2.4.2 yamt 241 1.2.4.2 yamt KASSERT(nlocks == 1); 242 1.2.4.2 yamt mutex_enter(&rump_giantlock); 243 1.2.4.2 yamt } 244 1.2.4.2 yamt 245 1.2.4.2 yamt void 246 1.2.4.2 yamt _kernel_unlock(int nlocks, struct lwp *l, int *countp) 247 1.2.4.2 yamt { 248 1.2.4.2 yamt 249 1.2.4.2 yamt KASSERT(nlocks == 1); 250 1.2.4.2 yamt mutex_exit(&rump_giantlock); 251 1.2.4.2 yamt if (countp) 252 1.2.4.2 yamt *countp = 1; 253 1.2.4.2 yamt } 254
Indexes created Tue Sep 30 17:09:57 GMT 2025