63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
/* 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 "swi.h"
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#include <errno.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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#include <sys/types.h>
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#include <time.h>
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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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