Last change
on this file since 474 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
1.1 KB
|
Rev | Line | |
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[444] | 1 | /* Support files for GNU libc. Files in the C namespace go here. |
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| 2 | Files in the system namespace (ie those that start with an underscore) |
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| 3 | go in syscalls.c. |
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| 4 | |
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| 5 | Note: These functions are in a seperate file so that OS providers can |
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| 6 | overrride the system call stubs (defined in syscalls.c) without having |
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| 7 | to provide libc funcitons as well. */ |
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| 8 | |
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| 9 | #include "swi.h" |
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| 10 | #include <errno.h> |
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| 11 | #include <unistd.h> |
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| 12 | |
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| 13 | unsigned __attribute__((weak)) |
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| 14 | alarm (unsigned seconds) |
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| 15 | { |
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| 16 | (void)seconds; |
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| 17 | return 0; |
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| 18 | } |
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| 19 | |
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| 20 | clock_t _clock(void); |
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| 21 | clock_t __attribute__((weak)) |
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| 22 | clock(void) |
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| 23 | { |
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| 24 | return _clock(); |
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| 25 | } |
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| 26 | |
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| 27 | int _isatty(int fildes); |
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| 28 | int __attribute__((weak)) |
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| 29 | isatty(int fildes) |
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| 30 | { |
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| 31 | return _isatty(fildes); |
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| 32 | } |
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| 33 | |
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| 34 | int __attribute__((weak)) |
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| 35 | pause(void) |
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| 36 | { |
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| 37 | errno = ENOSYS; |
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| 38 | return -1; |
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| 39 | } |
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| 40 | |
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| 41 | #include <sys/types.h> |
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| 42 | #include <time.h> |
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| 43 | |
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| 44 | unsigned __attribute__((weak)) |
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| 45 | sleep(unsigned seconds) |
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| 46 | { |
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| 47 | clock_t t0 = _clock(); |
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| 48 | clock_t dt = seconds * CLOCKS_PER_SEC; |
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| 49 | |
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| 50 | while (_clock() - t0 < dt); |
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| 51 | return 0; |
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| 52 | } |
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| 53 | |
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| 54 | int __attribute__((weak)) |
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| 55 | usleep(useconds_t useconds) |
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| 56 | { |
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| 57 | clock_t t0 = _clock(); |
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| 58 | clock_t dt = useconds / (1000000/CLOCKS_PER_SEC); |
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| 59 | |
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| 60 | while (_clock() - t0 < dt); |
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| 61 | return 0; |
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| 62 | } |
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