source: trunk/libs/newlib/src/libgloss/arc/libcfunc.c @ 536

Last change on this file since 536 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 2.7 KB
Line 
1/*
2   Copyright (c) 2015, Synopsys, Inc. All rights reserved.
3
4   Redistribution and use in source and binary forms, with or without
5   modification, are permitted provided that the following conditions are met:
6
7   1) Redistributions of source code must retain the above copyright notice,
8   this list of conditions and the following disclaimer.
9
10   2) Redistributions in binary form must reproduce the above copyright notice,
11   this list of conditions and the following disclaimer in the documentation
12   and/or other materials provided with the distribution.
13
14   3) Neither the name of the Synopsys, Inc., nor the names of its contributors
15   may be used to endorse or promote products derived from this software
16   without specific prior written permission.
17
18   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28   POSSIBILITY OF SUCH DAMAGE.
29*/
30
31/* This file has been copied from libgloss/arm/libcfuncs.c.
32
33   Support files for GNU libc.  Files in the C namespace go here.
34   Files in the system namespace (ie those that start with an underscore)
35   go in syscalls.c.
36
37   Note: These functions are in a seperate file so that OS providers can
38   overrride the system call stubs (defined in syscalls.c) without having
39   to provide libc functions as well.  */
40
41#include <errno.h>
42#include <sys/types.h>
43#include <time.h>
44#include <unistd.h>
45
46unsigned __attribute__((weak))
47alarm (unsigned seconds)
48{
49        (void)seconds;
50        return 0;
51}
52
53clock_t _clock (void);
54clock_t __attribute__((weak))
55clock (void)
56{
57      return _clock ();
58}
59
60int _isatty (int fildes);
61int __attribute__((weak))
62isatty (int fildes)
63{
64        return _isatty (fildes);
65}
66
67int __attribute__((weak))
68pause (void)
69{
70        errno = ENOSYS;
71        return -1;
72}
73
74unsigned __attribute__((weak))
75sleep (unsigned seconds)
76{
77        clock_t t0 = _clock ();
78        clock_t dt = seconds * CLOCKS_PER_SEC;
79
80        while (_clock () - t0  < dt);
81        return 0;
82}
83
84int __attribute__((weak))
85usleep (useconds_t useconds)
86{
87        clock_t t0 = _clock ();
88        clock_t dt = useconds / (1000000/CLOCKS_PER_SEC);
89
90        while (_clock () - t0  < dt);
91        return 0;
92}
Note: See TracBrowser for help on using the repository browser.