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62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/* clock_gettime -- Get current time from a POSIX clockid_t. Linux version.
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Copyright (C) 2003-2014 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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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <errno.h>
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#include <time.h>
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#include "kernel-posix-cpu-timers.h"
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#include <kernel-features.h>
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#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
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# undef INTERNAL_VSYSCALL
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# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
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# undef INLINE_VSYSCALL
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# define INLINE_VSYSCALL INLINE_SYSCALL
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#else
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# include <bits/libc-vdso.h>
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#endif
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#ifndef SYSCALL_GETTIME
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# define SYSCALL_GETTIME(id, tp) \
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INLINE_VSYSCALL (clock_gettime, 2, id, tp)
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#endif
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#ifndef INTERNAL_GETTIME
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# define INTERNAL_GETTIME(id, tp) \
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INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
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#endif
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/* The REALTIME and MONOTONIC clock are definitely supported in the
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kernel. */
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#define SYSDEP_GETTIME \
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SYSDEP_GETTIME_CPUTIME; \
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case CLOCK_REALTIME: \
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case CLOCK_MONOTONIC: \
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retval = SYSCALL_GETTIME (clock_id, tp); \
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break
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/* We handled the REALTIME clock here. */
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#define HANDLED_REALTIME 1
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#define HANDLED_CPUTIME 1
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#define SYSDEP_GETTIME_CPU(clock_id, tp) \
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retval = SYSCALL_GETTIME (clock_id, tp); \
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break
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#define SYSDEP_GETTIME_CPUTIME /* Default catches them too. */
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#include <sysdeps/unix/clock_gettime.c>
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