48 lines
883 B
C
48 lines
883 B
C
#include "stdio_impl.h"
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/* stdout.c will override this if linked */
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static FILE *volatile dummy = 0;
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weak_alias(dummy, __stdout_used);
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weak_alias(dummy, __stderr_used);
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int fflush(FILE *f)
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{
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if (!f) {
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int r = 0;
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if (__stdout_used) r |= fflush(__stdout_used);
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if (__stderr_used) r |= fflush(__stderr_used);
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for (f=*__ofl_lock(); f; f=f->next) {
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FLOCK(f);
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if (f->wpos != f->wbase) r |= fflush(f);
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FUNLOCK(f);
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}
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__ofl_unlock();
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return r;
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}
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FLOCK(f);
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/* If writing, flush output */
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if (f->wpos != f->wbase) {
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f->write(f, 0, 0);
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if (!f->wpos) {
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FUNLOCK(f);
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return EOF;
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}
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}
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/* If reading, sync position, per POSIX */
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if (f->rpos != f->rend) f->seek(f, f->rpos-f->rend, SEEK_CUR);
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/* Clear read and write modes */
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f->wpos = f->wbase = f->wend = 0;
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f->rpos = f->rend = 0;
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FUNLOCK(f);
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return 0;
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}
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weak_alias(fflush, fflush_unlocked);
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