1 /** @file 2 System-specific declarations and macros related to time. 3 4 Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials are licensed and made available under 6 the terms and conditions of the BSD License that accompanies this distribution. 7 The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 Copyright (c) 1982, 1986, 1993 14 The Regents of the University of California. All rights reserved. 15 16 Redistribution and use in source and binary forms, with or without 17 modification, are permitted provided that the following conditions 18 are met: 19 1. Redistributions of source code must retain the above copyright 20 notice, this list of conditions and the following disclaimer. 21 2. Redistributions in binary form must reproduce the above copyright 22 notice, this list of conditions and the following disclaimer in the 23 documentation and/or other materials provided with the distribution. 24 3. Neither the name of the University nor the names of its contributors 25 may be used to endorse or promote products derived from this software 26 without specific prior written permission. 27 28 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 SUCH DAMAGE. 39 40 time.h 8.5 (Berkeley) 5/4/95 41 NetBSD: time.h,v 1.56 2006/06/18 21:09:24 uwe Exp 42 */ 43 #ifndef _SYS_TIME_H_ 44 #define _SYS_TIME_H_ 45 46 #include <Uefi.h> 47 #include <sys/featuretest.h> 48 #include <sys/types.h> 49 50 /* 51 * Traditional *nix structure returned by gettimeofday(2) system call, 52 * and used in other calls. 53 */ 54 struct timeval { 55 LONG32 tv_sec; /* seconds */ 56 LONG32 tv_usec; /* and microseconds */ 57 }; 58 59 /* 60 * Structure defined by POSIX.1b to be like a timeval. 61 * This works within EFI since the times really are time_t. 62 */ 63 struct timespec { 64 time_t tv_sec; /* seconds */ 65 LONG32 tv_nsec; /* and nanoseconds */ 66 }; 67 68 #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \ 69 (ts)->tv_sec = (tv)->tv_sec; \ 70 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 71 } while (/*CONSTCOND*/0) 72 73 #define TIMESPEC_TO_TIMEVAL(tv, ts) do { \ 74 (tv)->tv_sec = (ts)->tv_sec; \ 75 (tv)->tv_usec = (ts)->tv_nsec / 1000; \ 76 } while (/*CONSTCOND*/0) 77 78 /* Operations on timevals. */ 79 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 80 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 81 82 #define timercmp(tvp, uvp, cmp) \ 83 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 84 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 85 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 86 87 #define timeradd(tvp, uvp, vvp) \ 88 do { \ 89 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 90 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 91 if ((vvp)->tv_usec >= 1000000) { \ 92 (vvp)->tv_sec++; \ 93 (vvp)->tv_usec -= 1000000; \ 94 } \ 95 } while (/* CONSTCOND */ 0) 96 97 #define timersub(tvp, uvp, vvp) \ 98 do { \ 99 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 100 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 101 if ((vvp)->tv_usec < 0) { \ 102 (vvp)->tv_sec--; \ 103 (vvp)->tv_usec += 1000000; \ 104 } \ 105 } while (/* CONSTCOND */ 0) 106 107 /* Operations on timespecs. */ 108 #define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0 109 #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec) 110 111 #define timespeccmp(tsp, usp, cmp) \ 112 (((tsp)->tv_sec == (usp)->tv_sec) ? \ 113 ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \ 114 ((tsp)->tv_sec cmp (usp)->tv_sec)) 115 116 #define timespecadd(tsp, usp, vsp) \ 117 do { \ 118 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ 119 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ 120 if ((vsp)->tv_nsec >= 1000000000L) { \ 121 (vsp)->tv_sec++; \ 122 (vsp)->tv_nsec -= 1000000000L; \ 123 } \ 124 } while (/* CONSTCOND */ 0) 125 126 #define timespecsub(tsp, usp, vsp) \ 127 do { \ 128 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ 129 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ 130 if ((vsp)->tv_nsec < 0) { \ 131 (vsp)->tv_sec--; \ 132 (vsp)->tv_nsec += 1000000000L; \ 133 } \ 134 } while (/* CONSTCOND */ 0) 135 136 /* 137 * Names of the interval timers, and structure 138 * defining a timer setting. 139 */ 140 #define ITIMER_REAL 0 141 #define ITIMER_VIRTUAL 1 142 #define ITIMER_PROF 2 143 144 struct itimerval { 145 struct timeval it_interval; /* timer interval */ 146 struct timeval it_value; /* current value */ 147 }; 148 149 /* 150 * Structure defined by POSIX.1b to be like a itimerval, but with 151 * timespecs. Used in the timer_*() system calls. 152 */ 153 struct itimerspec { 154 struct timespec it_interval; 155 struct timespec it_value; 156 }; 157 158 #define CLOCK_REALTIME 0 159 #define CLOCK_VIRTUAL 1 160 #define CLOCK_PROF 2 161 #define CLOCK_MONOTONIC 3 162 163 #define TIMER_RELTIME 0x0 /* relative timer */ 164 #define TIMER_ABSTIME 0x1 /* absolute timer */ 165 166 #if 0 167 #if (_POSIX_C_SOURCE - 0) >= 200112L || \ 168 (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 169 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 170 #include <sys/select.h> 171 #endif 172 #endif /* if 0 */ 173 174 #include <sys/EfiCdefs.h> 175 #include <time.h> 176 177 /* Functions useful for dealing with EFI */ 178 __BEGIN_DECLS 179 180 /* Convert an EFI_TIME structure into a time_t value. */ 181 time_t Efi2Time( EFI_TIME *EfiBDtime); 182 183 /* Convert a time_t value into an EFI_TIME structure. 184 It is the caller's responsibility to free the returned structure. 185 */ 186 EFI_TIME * Time2Efi(time_t OTime); 187 188 /* Convert an EFI_TIME structure into a C Standard tm structure. */ 189 void Efi2Tm( EFI_TIME *EfiBDtime, struct tm *NewTime); 190 void Tm2Efi( struct tm *BdTime, EFI_TIME *ETime); 191 192 /* BSD compatibility functions */ 193 int gettimeofday (struct timeval *tp, void *ignore); 194 /* POSIX compatibility functions */ 195 int getitimer (int which, struct itimerval *value); 196 int setitimer (int which, const struct itimerval *value, struct itimerval *ovalue); 197 198 __END_DECLS 199 200 #endif /* !_SYS_TIME_H_ */ 201
