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Annotation of embedaddon/sudo/compat/clock_gettime.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 2014 Todd C. Miller <Todd.Miller@courtesan.com>
                      3:  *
                      4:  * Permission to use, copy, modify, and distribute this software for any
                      5:  * purpose with or without fee is hereby granted, provided that the above
                      6:  * copyright notice and this permission notice appear in all copies.
                      7:  *
                      8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                      9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     15:  */
                     16: 
                     17: #include <config.h>
                     18: 
                     19: #if !defined(HAVE_CLOCK_GETTIME)
                     20: 
                     21: #include <sys/types.h>
                     22: #include <sys/time.h>
                     23: 
                     24: #include <errno.h>
                     25: #include <stdio.h>
                     26: #ifdef TIME_WITH_SYS_TIME
                     27: # include <time.h>
                     28: #endif
                     29: #ifndef HAVE_STRUCT_TIMESPEC
                     30: # include "compat/timespec.h"
                     31: #endif
                     32: 
                     33: #include "missing.h"
                     34: 
                     35: #ifdef __MACH__
                     36: # include <mach/mach.h>
                     37: # include <mach/mach_time.h>
                     38: # include <mach/clock.h>
                     39: #endif
                     40: 
                     41: /*
                     42:  * Trivial clock_gettime() that supports CLOCK_REALTIME
                     43:  * (and CLOCK_MONOTONIC on Mach).
                     44:  */
                     45: int
                     46: clock_gettime(clockid_t clock_id, struct timespec *ts)
                     47: {
                     48: 
                     49:     switch (clock_id) {
                     50: #ifdef __MACH__
                     51:     case CLOCK_MONOTONIC:
                     52:        {
                     53:            uint64_t abstime, nsec;
                     54:            static mach_timebase_info_data_t timebase_info;
                     55: 
                     56:            if (timebase_info.denom == 0)
                     57:                (void) mach_timebase_info(&timebase_info);
                     58:            abstime = mach_absolute_time();
                     59:            nsec = abstime * timebase_info.numer / timebase_info.denom;
                     60:            ts->tv_sec = nsec / 1000000000;
                     61:            ts->tv_nsec = nsec % 1000000000;
                     62:            return 0;
                     63:        }
                     64: #endif
                     65:     case CLOCK_REALTIME:
                     66:        {
                     67:            struct timeval tv;
                     68: 
                     69:            gettimeofday(&tv, NULL);
                     70:            ts->tv_sec = tv.tv_sec;
                     71:            ts->tv_nsec = tv.tv_usec * 1000;
                     72:            return 0;
                     73:        }
                     74:     default:
                     75:        errno = EINVAL;
                     76:        return -1;
                     77:     }
                     78: }
                     79: 
                     80: #endif /* !HAVE_CLOCK_GETTIME */