92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
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/* Copyright (c) 2009, 2010, 2011, 2012 ARM Ltd. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the company may not be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* Support files for GNU libc. Files in the C namespace go here.
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Files in the system namespace (ie those that start with an underscore)
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go in syscalls.c.
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Note: These functions are in a seperate file so that OS providers can
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overrride the system call stubs (defined in syscalls.c) without having
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to provide libc funcitons as well. */
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#include "svc.h"
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#include <errno.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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extern clock_t _clock (void);
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extern int _isatty (int);
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unsigned __attribute__((weak))
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alarm (unsigned seconds)
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{
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(void) seconds;
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return 0;
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}
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clock_t __attribute__((weak))
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clock (void)
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{
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return _clock ();
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}
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int __attribute__((weak))
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isatty (int fildes)
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{
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return _isatty (fildes);
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}
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int __attribute__((weak))
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pause (void)
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{
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errno = ENOSYS;
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return -1;
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}
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unsigned __attribute__((weak))
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sleep (unsigned seconds)
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{
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clock_t t0 = _clock ();
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clock_t dt = seconds * CLOCKS_PER_SEC;
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while (_clock () - t0 < dt)
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;
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return 0;
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}
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int __attribute__((weak))
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usleep (useconds_t useconds)
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{
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clock_t t0 = _clock ();
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clock_t dt = useconds / (1000000 / CLOCKS_PER_SEC);
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while (_clock () - t0 < dt)
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;
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return 0;
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}
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