93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
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/*
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Copyright (c) 2015, Synopsys, Inc. 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 are met:
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1) Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2) Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3) Neither the name of the Synopsys, Inc., nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* This file has been copied from libgloss/arm/libcfuncs.c.
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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 functions as well. */
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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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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 _clock (void);
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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 _isatty (int fildes);
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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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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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return 0;
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}
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