127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
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/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <time.h>
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#include <mach.h>
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#include <assert.h>
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#include <shlib-compat.h>
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/* Get the current time of day, putting it into *TS.
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Returns 0 on success, -1 on errors. */
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int
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__clock_gettime (clockid_t clock_id, struct timespec *ts)
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{
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mach_msg_type_number_t count;
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error_t err;
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switch (clock_id) {
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case CLOCK_REALTIME:
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{
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/* __host_get_time can only fail if passed an invalid host_t.
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__mach_host_self could theoretically fail (producing an
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invalid host_t) due to resource exhaustion, but we assume
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this will never happen. */
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time_value_t tv;
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__host_get_time (__mach_host_self (), &tv);
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TIME_VALUE_TO_TIMESPEC (&tv, ts);
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return 0;
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}
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case CLOCK_PROCESS_CPUTIME_ID:
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{
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struct time_value t = { .seconds = 0, .microseconds = 0 };
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struct task_basic_info bi;
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struct task_thread_times_info tti;
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/* Dead threads CPU time. */
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count = TASK_BASIC_INFO_COUNT;
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err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
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(task_info_t) &bi, &count);
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if (err)
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{
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__set_errno(err);
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return -1;
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}
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time_value_add (&t, &bi.user_time);
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time_value_add (&t, &bi.system_time);
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/* Live threads CPU time. */
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count = TASK_EVENTS_INFO_COUNT;
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err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
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(task_info_t) &tti, &count);
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if (err)
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{
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__set_errno(err);
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return -1;
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}
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time_value_add (&t, &tti.user_time);
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time_value_add (&t, &tti.system_time);
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TIME_VALUE_TO_TIMESPEC(&t, ts);
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return 0;
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}
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case CLOCK_THREAD_CPUTIME_ID:
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{
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struct thread_basic_info bi;
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mach_port_t self = __mach_thread_self ();
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count = THREAD_BASIC_INFO_COUNT;
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err = __thread_info (self, THREAD_BASIC_INFO,
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(thread_info_t) &bi, &count);
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__mach_port_deallocate (__mach_task_self (), self);
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if (err)
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{
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__set_errno(err);
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return -1;
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}
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time_value_add (&bi.user_time, &bi.system_time);
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TIME_VALUE_TO_TIMESPEC(&bi.user_time, ts);
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return 0;
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}
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}
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errno = EINVAL;
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return -1;
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}
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libc_hidden_def (__clock_gettime)
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versioned_symbol (libc, __clock_gettime, clock_gettime, GLIBC_2_17);
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/* clock_gettime moved to libc in version 2.17;
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old binaries may expect the symbol version it had in librt. */
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#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
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strong_alias (__clock_gettime, __clock_gettime_2);
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compat_symbol (libc, __clock_gettime_2, clock_gettime, GLIBC_2_2);
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#endif
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int
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__clock_gettime64 (clockid_t clock_id, struct __timespec64 *ts64)
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{
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struct timespec ts;
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int ret;
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ret = __clock_gettime (clock_id, &ts);
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if (ret == 0)
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*ts64 = valid_timespec_to_timespec64 (ts);
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return ret;
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}
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libc_hidden_def (__clock_gettime64)
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