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 */ 29 30 #include <sys/types.h> 31 #include <sys/syscall.h> 32 33 #include "namespace.h" 34 #include <errno.h> 35 #include <stddef.h> 36 #include <signal.h> 37 #include <stdlib.h> 38 #include <time.h> 39 #include "sigev_thread.h" 40 #include "un-namespace.h" 41 42 extern int __sys_ktimer_create(clockid_t, struct sigevent *__restrict, 43 int *__restrict); 44 extern int __sys_ktimer_delete(int); 45 extern int __sys_ktimer_gettime(int, struct itimerspec *); 46 extern int __sys_ktimer_getoverrun(int); 47 extern int __sys_ktimer_settime(int, int, 48 const struct itimerspec *__restrict, struct itimerspec *__restrict); 49 50 struct __timer { 51 int oshandle; 52 struct sigev_node *node; 53 }; 54 55 __weak_reference(__timer_create, timer_create); 56 __weak_reference(__timer_create, _timer_create); 57 __weak_reference(__timer_delete, timer_delete); 58 __weak_reference(__timer_delete, _timer_delete); 59 __weak_reference(__timer_gettime, timer_gettime); 60 __weak_reference(__timer_gettime, _timer_gettime); 61 __weak_reference(__timer_settime, timer_settime); 62 __weak_reference(__timer_settime, _timer_settime); 63 __weak_reference(__timer_getoverrun, timer_getoverrun); 64 __weak_reference(__timer_getoverrun, _timer_getoverrun); 65 66 typedef void (*timer_func)(union sigval val, int overrun); 67 68 static void 69 timer_dispatch(struct sigev_node *sn) 70 { 71 timer_func f = sn->sn_func; 72 73 /* I want to avoid expired notification. */ 74 if (sn->sn_info.si_value.sival_int == sn->sn_gen) 75 f(sn->sn_value, sn->sn_info.si_overrun); 76 } 77 78 int 79 __timer_create(clockid_t clockid, struct sigevent *evp, timer_t *timerid) 80 { 81 struct __timer *timer; 82 struct sigevent ev; 83 struct sigev_node *sn; 84 int ret, err; 85 86 timer = malloc(sizeof(struct __timer)); 87 if (timer == NULL) 88 return (-1); 89 90 if (evp == NULL || evp->sigev_notify != SIGEV_THREAD) { 91 ret = __sys_ktimer_create(clockid, evp, &timer->oshandle); 92 if (ret == -1) { 93 err = errno; 94 free(timer); 95 errno = err; 96 return (ret); 97 } 98 timer->node = NULL; 99 *timerid = timer; 100 return (0); 101 } 102 103 if (__sigev_check_init()) { 104 free(timer); 105 errno = EINVAL; 106 return (-1); 107 } 108 109 sn = __sigev_alloc(SI_TIMER, evp, NULL, 0); 110 if (sn == NULL) { 111 free(timer); 112 errno = EAGAIN; 113 return (-1); 114 } 115 116 __sigev_get_sigevent(sn, &ev, sn->sn_gen); 117 ret = __sys_ktimer_create(clockid, &ev, &timer->oshandle); 118 if (ret != 0) { 119 err = errno; 120 __sigev_free(sn); 121 free(timer); 122 errno = err; 123 return (-1); 124 } 125 sn->sn_flags |= SNF_SYNC; 126 sn->sn_dispatch = timer_dispatch; 127 sn->sn_id = timer->oshandle; 128 timer->node = sn; 129 __sigev_list_lock(); 130 __sigev_register(sn); 131 __sigev_list_unlock(); 132 *timerid = timer; 133 return (0); 134 } 135 136 int 137 __timer_delete(timer_t timerid) 138 { 139 int ret, err; 140 141 if (timerid->node != NULL) { 142 __sigev_list_lock(); 143 __sigev_delete_node(timerid->node); 144 __sigev_list_unlock(); 145 } 146 ret = __sys_ktimer_delete(timerid->oshandle); 147 err = errno; 148 free(timerid); 149 errno = err; 150 return (ret); 151 } 152 153 int 154 __timer_gettime(timer_t timerid, struct itimerspec *value) 155 { 156 157 return __sys_ktimer_gettime(timerid->oshandle, value); 158 } 159 160 int 161 __timer_getoverrun(timer_t timerid) 162 { 163 164 return __sys_ktimer_getoverrun(timerid->oshandle); 165 } 166 167 int 168 __timer_settime(timer_t timerid, int flags, 169 const struct itimerspec *__restrict value, 170 struct itimerspec *__restrict ovalue) 171 { 172 173 return __sys_ktimer_settime(timerid->oshandle, 174 flags, value, ovalue); 175 } 176 177 #pragma weak timer_oshandle_np 178 int 179 timer_oshandle_np(timer_t timerid) 180 { 181 182 return (timerid->oshandle); 183 } 184