1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "lint.h" 30 #include <time.h> 31 #include <sys/types.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <errno.h> 35 #include "sigev_thread.h" 36 37 /* 38 * System call wrappers found elsewhere in libc (common/sys/__clock_timer.s). 39 */ 40 extern int __clock_getres(clockid_t, timespec_t *); 41 extern int __clock_gettime(clockid_t, timespec_t *); 42 extern int __clock_settime(clockid_t, const timespec_t *); 43 extern int __timer_create(clockid_t, struct sigevent *, timer_t *); 44 extern int __timer_delete(timer_t); 45 extern int __timer_getoverrun(timer_t); 46 extern int __timer_gettime(timer_t, itimerspec_t *); 47 extern int __timer_settime(timer_t, int, const itimerspec_t *, itimerspec_t *); 48 49 /* 50 * Array of pointers to tcd's, indexed by timer id. 51 * No more than 'timer_max' timers can be created by any process. 52 */ 53 int timer_max = 0; 54 thread_communication_data_t **timer_tcd; 55 static pthread_once_t timer_once = PTHREAD_ONCE_INIT; 56 57 static void 58 timer_init(void) 59 { 60 timer_max = (int)_sysconf(_SC_TIMER_MAX); 61 timer_tcd = malloc(timer_max * sizeof (*timer_tcd)); 62 (void) memset(timer_tcd, 0, timer_max * sizeof (*timer_tcd)); 63 } 64 65 int 66 clock_getres(clockid_t clock_id, timespec_t *res) 67 { 68 return (__clock_getres(clock_id, res)); 69 } 70 71 int 72 clock_gettime(clockid_t clock_id, timespec_t *tp) 73 { 74 return (__clock_gettime(clock_id, tp)); 75 } 76 77 int 78 clock_settime(clockid_t clock_id, const timespec_t *tp) 79 { 80 return (__clock_settime(clock_id, tp)); 81 } 82 83 int 84 timer_create(clockid_t clock_id, struct sigevent *sigevp, timer_t *timerid) 85 { 86 struct sigevent sigevent; 87 port_notify_t port_notify; 88 thread_communication_data_t *tcdp; 89 int sigev_thread = 0; 90 int rc; 91 92 (void) pthread_once(&timer_once, timer_init); 93 94 if (sigevp != NULL && 95 sigevp->sigev_notify == SIGEV_THREAD && 96 sigevp->sigev_notify_function != NULL) { 97 sigev_thread = 1; 98 tcdp = setup_sigev_handler(sigevp, TIMER); 99 if (tcdp == NULL) 100 return (-1); 101 /* copy the sigevent structure so we can modify it */ 102 sigevent = *sigevp; 103 sigevp = &sigevent; 104 port_notify.portnfy_port = tcdp->tcd_port; 105 port_notify.portnfy_user = NULL; 106 sigevp->sigev_value.sival_ptr = &port_notify; 107 } 108 109 rc = __timer_create(clock_id, sigevp, timerid); 110 111 if (sigev_thread) { 112 if (rc == 0) { 113 if ((rc = launch_spawner(tcdp)) != 0) 114 __timer_delete(*timerid); 115 else 116 timer_tcd[*timerid] = tcdp; 117 } 118 if (rc != 0) 119 free_sigev_handler(tcdp); 120 } 121 122 return (rc); 123 } 124 125 int 126 timer_delete(timer_t timerid) 127 { 128 int rc; 129 130 if ((rc = del_sigev_timer(timerid)) == 0) 131 return (__timer_delete(timerid)); 132 else 133 return (rc); 134 } 135 136 int 137 timer_getoverrun(timer_t timerid) 138 { 139 return (__timer_getoverrun(timerid) + sigev_timer_getoverrun(timerid)); 140 } 141 142 int 143 timer_gettime(timer_t timerid, itimerspec_t *value) 144 { 145 return (__timer_gettime(timerid, value)); 146 } 147 148 int 149 timer_settime(timer_t timerid, int flags, const itimerspec_t *value, 150 itimerspec_t *ovalue) 151 { 152 return (__timer_settime(timerid, flags, value, ovalue)); 153 } 154 155 /* 156 * Cleanup after fork1() in the child process. 157 */ 158 void 159 postfork1_child_sigev_timer(void) 160 { 161 thread_communication_data_t *tcdp; 162 int timer; 163 164 for (timer = 0; timer < timer_max; timer++) { 165 if ((tcdp = timer_tcd[timer]) != NULL) { 166 timer_tcd[timer] = NULL; 167 tcd_teardown(tcdp); 168 } 169 } 170 } 171