92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
|
|
Copyright (c) 2015, Synopsys, Inc. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1) Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
|
|
2) Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
3) Neither the name of the Synopsys, Inc., nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/* This file has been copied from libgloss/arm/libcfuncs.c.
|
|
|
|
Support files for GNU libc. Files in the C namespace go here.
|
|
Files in the system namespace (ie those that start with an underscore)
|
|
go in syscalls.c.
|
|
|
|
Note: These functions are in a seperate file so that OS providers can
|
|
overrride the system call stubs (defined in syscalls.c) without having
|
|
to provide libc functions as well. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
unsigned __attribute__((weak))
|
|
alarm (unsigned seconds)
|
|
{
|
|
(void)seconds;
|
|
return 0;
|
|
}
|
|
|
|
clock_t _clock (void);
|
|
clock_t __attribute__((weak))
|
|
clock (void)
|
|
{
|
|
return _clock ();
|
|
}
|
|
|
|
int _isatty (int fildes);
|
|
int __attribute__((weak))
|
|
isatty (int fildes)
|
|
{
|
|
return _isatty (fildes);
|
|
}
|
|
|
|
int __attribute__((weak))
|
|
pause (void)
|
|
{
|
|
errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
unsigned __attribute__((weak))
|
|
sleep (unsigned seconds)
|
|
{
|
|
clock_t t0 = _clock ();
|
|
clock_t dt = seconds * CLOCKS_PER_SEC;
|
|
|
|
while (_clock () - t0 < dt);
|
|
return 0;
|
|
}
|
|
|
|
int __attribute__((weak))
|
|
usleep (useconds_t useconds)
|
|
{
|
|
clock_t t0 = _clock ();
|
|
clock_t dt = useconds / (1000000/CLOCKS_PER_SEC);
|
|
|
|
while (_clock () - t0 < dt);
|
|
return 0;
|
|
}
|