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/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <time.h>
#include <mach.h>
#include <assert.h>
#include <shlib-compat.h>
#include <mach/mig_errors.h>
/* Get the current time of day, putting it into *TS.
Returns 0 on success, -1 on errors. */
int
__clock_gettime (clockid_t clock_id, struct timespec *ts)
{
mach_msg_type_number_t count;
error_t err;
switch (clock_id) {
case CLOCK_MONOTONIC:
/* If HAVE_HOST_GET_UPTIME64 is not defined or not available,
CLOCK_MONOTONIC will be equivalent to CLOCK_REALTIME. */
#ifdef HAVE_HOST_GET_UPTIME64
{
time_value64_t tv;
err = __host_get_uptime64 (__mach_host_self (), &tv);
if (err != MIG_BAD_ID)
{
if (err)
{
__set_errno (err);
return -1;
}
TIME_VALUE64_TO_TIMESPEC (&tv, ts);
return 0;
}
}
#endif
/* FALLTHROUGH */
case CLOCK_REALTIME:
{
/* __host_get_time can only fail if passed an invalid host_t.
__mach_host_self could theoretically fail (producing an
invalid host_t) due to resource exhaustion, but we assume
this will never happen. */
time_value_t tv;
__host_get_time (__mach_host_self (), &tv);
TIME_VALUE_TO_TIMESPEC (&tv, ts);
return 0;
}
case CLOCK_PROCESS_CPUTIME_ID:
{
struct time_value t = { .seconds = 0, .microseconds = 0 };
struct task_basic_info bi;
struct task_thread_times_info tti;
/* Dead threads CPU time. */
count = TASK_BASIC_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
(task_info_t) &bi, &count);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&t, &bi.user_time);
time_value_add (&t, &bi.system_time);
/* Live threads CPU time. */
count = TASK_THREAD_TIMES_INFO_COUNT;
err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
(task_info_t) &tti, &count);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&t, &tti.user_time);
time_value_add (&t, &tti.system_time);
TIME_VALUE_TO_TIMESPEC(&t, ts);
return 0;
}
case CLOCK_THREAD_CPUTIME_ID:
{
struct thread_basic_info bi;
mach_port_t self = __mach_thread_self ();
count = THREAD_BASIC_INFO_COUNT;
err = __thread_info (self, THREAD_BASIC_INFO,
(thread_info_t) &bi, &count);
__mach_port_deallocate (__mach_task_self (), self);
if (err)
{
__set_errno(err);
return -1;
}
time_value_add (&bi.user_time, &bi.system_time);
TIME_VALUE_TO_TIMESPEC(&bi.user_time, ts);
return 0;
}
}
errno = EINVAL;
return -1;
}
libc_hidden_def (__clock_gettime)
versioned_symbol (libc, __clock_gettime, clock_gettime, GLIBC_2_17);
/* clock_gettime moved to libc in version 2.17;
old binaries may expect the symbol version it had in librt. */
#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
strong_alias (__clock_gettime, __clock_gettime_2);
compat_symbol (libc, __clock_gettime_2, clock_gettime, GLIBC_2_2);
#endif
#if __TIMESIZE != 64
int
__clock_gettime64 (clockid_t clock_id, struct __timespec64 *ts64)
{
struct timespec ts;
int ret;
ret = __clock_gettime (clock_id, &ts);
if (ret == 0)
*ts64 = valid_timespec_to_timespec64 (ts);
return ret;
}
libc_hidden_def (__clock_gettime64)
#endif
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