51 lines
910 B
C
51 lines
910 B
C
#include "stdio_impl.h"
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static int __fflush_unlocked(FILE *f)
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{
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/* If writing, flush output. */
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if (f->wpos > f->buf && __oflow(f)) return -1;
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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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f->rpos = f->rend;
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/* Hook for special behavior on flush */
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if (f->flush) f->flush(f);
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return (f->flags & F_ERR) ? EOF : 0;
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}
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/* stdout.c will override this if linked */
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static FILE *const __dummy = 0;
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weak_alias(__dummy, __stdout_to_flush);
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int fflush(FILE *f)
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{
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int r;
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FILE *next;
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if (f) {
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FLOCK(f);
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r = __fflush_unlocked(f);
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FUNLOCK(f);
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return r;
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}
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r = __stdout_to_flush ? fflush(__stdout_to_flush) : 0;
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OFLLOCK();
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for (f=ofl_head; f; f=next) {
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FLOCK(f);
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OFLUNLOCK();
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r |= __fflush_unlocked(f);
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OFLLOCK();
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next = f->next;
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FUNLOCK(f);
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}
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OFLUNLOCK();
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return r;
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}
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weak_alias(__fflush_unlocked, fflush_unlocked);
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