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 2007 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 <errno.h> 30 #include <string.h> 31 #include <time.h> 32 #include <sys/lx_misc.h> 33 34 /* 35 * Linux uses different values for it clock identifiers, so we have to do basic 36 * translations between the two. Thankfully, both Linux and Solaris implement 37 * the same POSIX SUSv3 clock types, so the semantics should be identical. 38 */ 39 40 static int ltos_clock[] = { 41 CLOCK_REALTIME, 42 CLOCK_MONOTONIC, 43 CLOCK_PROCESS_CPUTIME_ID, 44 CLOCK_THREAD_CPUTIME_ID 45 }; 46 47 #define LX_CLOCK_MAX (sizeof (ltos_clock) / sizeof (ltos_clock[0])) 48 49 int 50 lx_clock_gettime(int clock, struct timespec *tp) 51 { 52 struct timespec ts; 53 54 if (clock < 0 || clock > LX_CLOCK_MAX) 55 return (-EINVAL); 56 57 if (clock_gettime(ltos_clock[clock], &ts) < 0) 58 return (-errno); 59 60 return ((uucopy(&ts, tp, sizeof (struct timespec)) < 0) ? -EFAULT : 0); 61 } 62 63 int 64 lx_clock_settime(int clock, struct timespec *tp) 65 { 66 struct timespec ts; 67 68 if (clock < 0 || clock > LX_CLOCK_MAX) 69 return (-EINVAL); 70 71 if (uucopy(tp, &ts, sizeof (struct timespec)) < 0) 72 return (-EFAULT); 73 74 return ((clock_settime(ltos_clock[clock], &ts) < 0) ? -errno : 0); 75 } 76 77 int 78 lx_clock_getres(int clock, struct timespec *tp) 79 { 80 struct timespec ts; 81 82 if (clock < 0 || clock > LX_CLOCK_MAX) 83 return (-EINVAL); 84 85 if (clock_getres(ltos_clock[clock], &ts) < 0) 86 return (-errno); 87 88 return ((uucopy(&ts, tp, sizeof (struct timespec)) < 0) ? -EFAULT : 0); 89 } 90 91 int 92 lx_clock_nanosleep(int clock, int flags, struct timespec *rqtp, 93 struct timespec *rmtp) 94 { 95 struct timespec rqt, rmt; 96 97 if (clock < 0 || clock > LX_CLOCK_MAX) 98 return (-EINVAL); 99 100 if (uucopy(rqtp, &rqt, sizeof (struct timespec)) < 0) 101 return (-EFAULT); 102 103 /* the TIMER_RELTIME and TIMER_ABSTIME flags are the same on Linux */ 104 if (clock_nanosleep(ltos_clock[clock], flags, &rqt, &rmt) < 0) 105 return (-errno); 106 107 /* 108 * Only copy values to rmtp if the timer is TIMER_RELTIME and rmtp is 109 * non-NULL. 110 */ 111 if (((flags & TIMER_RELTIME) == TIMER_RELTIME) && (rmtp != NULL) && 112 (uucopy(&rmt, rmtp, sizeof (struct timespec)) < 0)) 113 return (-EFAULT); 114 115 return (0); 116 }