148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
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/*
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* Copyright (c) 2018 Chris Jones <jonesc@macports.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "time.h"
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#if __MP_LEGACY_SUPPORT_GETTIME__
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <sys/resource.h>
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#include <mach/mach_init.h>
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#include <mach/mach_port.h>
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#include <mach/mach_time.h>
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#include <mach/thread_act.h>
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#define BILLION 1000000000L
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#define MILLION 1000000L
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#define THOUSAND 1000L
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int clock_gettime( clockid_t clk_id, struct timespec *ts )
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{
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int ret = -1;
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if ( ts )
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{
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if ( CLOCK_REALTIME == clk_id )
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{
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struct timeval tv;
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ret = gettimeofday(&tv, NULL);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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}
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else if ( CLOCK_MONOTONIC == clk_id )
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{
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struct timeval boottime;
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size_t boottime_len = sizeof(boottime);
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ret = sysctlbyname("kern.boottime", &boottime, &boottime_len, NULL, 0);
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if (ret != KERN_SUCCESS) { return ret; }
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struct timeval tv;
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ret = gettimeofday(&tv, NULL);
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timersub(&tv, &boottime, &tv);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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ret = 0;
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}
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else if ( CLOCK_PROCESS_CPUTIME_ID == clk_id )
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{
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struct rusage ru;
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ret = getrusage(RUSAGE_SELF, &ru);
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timeradd(&ru.ru_utime, &ru.ru_stime, &ru.ru_utime);
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ts->tv_sec = ru.ru_utime.tv_sec;
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ts->tv_nsec = ru.ru_utime.tv_usec * 1000;
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}
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else if ( CLOCK_THREAD_CPUTIME_ID == clk_id )
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{
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mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
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thread_basic_info_data_t info;
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thread_port_t thread = mach_thread_self();
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ret = thread_info(thread, THREAD_BASIC_INFO, (thread_info_t) &info, &count);
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mach_port_deallocate(mach_task_self(), thread);
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time_value_add(&info.user_time, &info.system_time);
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ts->tv_sec = info.user_time.seconds;
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ts->tv_nsec = info.user_time.microseconds * 1000;
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}
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else if ( CLOCK_MONOTONIC_RAW == clk_id ||
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CLOCK_MONOTONIC_RAW_APPROX == clk_id ||
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CLOCK_UPTIME_RAW == clk_id ||
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CLOCK_UPTIME_RAW_APPROX == clk_id )
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{
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static mach_timebase_info_data_t timebase;
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if ( 0 == timebase.numer || 0 == timebase.denom ) {
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const kern_return_t kr = mach_timebase_info( &timebase );
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if ( kr != KERN_SUCCESS ) { return kr; }
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}
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uint64_t tdiff = mach_absolute_time() * ( timebase.numer / timebase.denom );
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ts->tv_sec = tdiff / BILLION;
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ts->tv_nsec = tdiff % BILLION;
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ret = 0;
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}
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}
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return ret;
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}
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int clock_getres( clockid_t clk_id, struct timespec *ts )
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{
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int ret = -1;
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if ( ts )
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{
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if ( CLOCK_REALTIME == clk_id ||
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CLOCK_MONOTONIC == clk_id ||
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CLOCK_PROCESS_CPUTIME_ID == clk_id ||
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CLOCK_THREAD_CPUTIME_ID == clk_id)
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{
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// return 1us precision
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ts->tv_sec = 0;
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ts->tv_nsec = THOUSAND;
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ret = 0;
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}
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else if ( CLOCK_MONOTONIC_RAW == clk_id ||
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CLOCK_MONOTONIC_RAW_APPROX == clk_id ||
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CLOCK_UPTIME_RAW == clk_id ||
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CLOCK_UPTIME_RAW_APPROX == clk_id )
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{
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// return 1ns precision
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ts->tv_sec = 0;
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ts->tv_nsec = 1;
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ret = 0;
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}
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}
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return ret;
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}
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#endif
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#if __MP_LEGACY_SUPPORT_TIMESPEC_GET__
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int timespec_get(struct timespec *ts, int base)
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{
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switch (base) {
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case TIME_UTC:
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if (clock_gettime(CLOCK_REALTIME, ts) == -1) {
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return 0;
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}
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return base;
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default:
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return 0;
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}
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}
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#endif
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