1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 David Xu <davidxu@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 * 30 */ 31 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 #include <sys/syscall.h> 35 36 #include "namespace.h" 37 #include <errno.h> 38 #include <stddef.h> 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <time.h> 42 #include "sigev_thread.h" 43 #include "un-namespace.h" 44 45 extern int __sys_ktimer_create(clockid_t, struct sigevent *__restrict, 46 int *__restrict); 47 extern int __sys_ktimer_delete(int); 48 extern int __sys_ktimer_gettime(int, struct itimerspec *); 49 extern int __sys_ktimer_getoverrun(int); 50 extern int __sys_ktimer_settime(int, int, 51 const struct itimerspec *__restrict, struct itimerspec *__restrict); 52 53 struct __timer { 54 int oshandle; 55 struct sigev_node *node; 56 }; 57 58 __weak_reference(__timer_create, timer_create); 59 __weak_reference(__timer_create, _timer_create); 60 __weak_reference(__timer_delete, timer_delete); 61 __weak_reference(__timer_delete, _timer_delete); 62 __weak_reference(__timer_gettime, timer_gettime); 63 __weak_reference(__timer_gettime, _timer_gettime); 64 __weak_reference(__timer_settime, timer_settime); 65 __weak_reference(__timer_settime, _timer_settime); 66 __weak_reference(__timer_getoverrun, timer_getoverrun); 67 __weak_reference(__timer_getoverrun, _timer_getoverrun); 68 69 typedef void (*timer_func)(union sigval val, int overrun); 70 71 static void 72 timer_dispatch(struct sigev_node *sn) 73 { 74 timer_func f = sn->sn_func; 75 76 /* I want to avoid expired notification. */ 77 if (sn->sn_info.si_value.sival_int == sn->sn_gen) 78 f(sn->sn_value, sn->sn_info.si_overrun); 79 } 80 81 int 82 __timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 83 { 84 struct __timer *timer; 85 struct sigevent ev; 86 struct sigev_node *sn; 87 int ret, err; 88 89 timer = malloc(sizeof(struct __timer)); 90 if (timer == NULL) 91 return (-1); 92 93 if (evp == NULL || evp->sigev_notify != SIGEV_THREAD) { 94 ret = __sys_ktimer_create(clockid, evp, &timer->oshandle); 95 if (ret == -1) { 96 err = errno; 97 free(timer); 98 errno = err; 99 return (ret); 100 } 101 timer->node = NULL; 102 *timerid = timer; 103 return (0); 104 } 105 106 if (__sigev_check_init()) { 107 free(timer); 108 errno = EINVAL; 109 return (-1); 110 } 111 112 sn = __sigev_alloc(SI_TIMER, evp, NULL, 0); 113 if (sn == NULL) { 114 free(timer); 115 errno = EAGAIN; 116 return (-1); 117 } 118 119 __sigev_get_sigevent(sn, &ev, sn->sn_gen); 120 ret = __sys_ktimer_create(clockid, &ev, &timer->oshandle); 121 if (ret != 0) { 122 err = errno; 123 __sigev_free(sn); 124 free(timer); 125 errno = err; 126 return (-1); 127 } 128 sn->sn_flags |= SNF_SYNC; 129 sn->sn_dispatch = timer_dispatch; 130 sn->sn_id = timer->oshandle; 131 timer->node = sn; 132 __sigev_list_lock(); 133 __sigev_register(sn); 134 __sigev_list_unlock(); 135 *timerid = timer; 136 return (0); 137 } 138 139 int 140 __timer_delete(timer_t timerid) 141 { 142 int ret, err; 143 144 if (timerid->node != NULL) { 145 __sigev_list_lock(); 146 __sigev_delete_node(timerid->node); 147 __sigev_list_unlock(); 148 } 149 ret = __sys_ktimer_delete(timerid->oshandle); 150 err = errno; 151 free(timerid); 152 errno = err; 153 return (ret); 154 } 155 156 int 157 __timer_gettime(timer_t timerid, struct itimerspec *value) 158 { 159 160 return __sys_ktimer_gettime(timerid->oshandle, value); 161 } 162 163 int 164 __timer_getoverrun(timer_t timerid) 165 { 166 167 return __sys_ktimer_getoverrun(timerid->oshandle); 168 } 169 170 int 171 __timer_settime(timer_t timerid, int flags, 172 const struct itimerspec *__restrict value, 173 struct itimerspec *__restrict ovalue) 174 { 175 176 return __sys_ktimer_settime(timerid->oshandle, 177 flags, value, ovalue); 178 } 179 180 #pragma weak timer_oshandle_np 181 int 182 timer_oshandle_np(timer_t timerid) 183 { 184 185 return (timerid->oshandle); 186 } 187