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stdio_ext.3: ATTRIBUTES: Note functions that are not thread-safe
The functions __fbufsize(), __fpending(), __fpurge() and __fsetlocking() are not thread safe. Signed-off-by: Peng Haitao <penght@cn.fujitsu.com> Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -129,6 +129,25 @@ output to a terminal is forced out, say before reading keyboard input.)
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The
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.BR __fpurge ()
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function discards the contents of the stream's buffer.
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.SH ATTRIBUTES
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.SS Multithreading (see pthreads(7))
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The
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.BR __fbufsize (),
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.BR __fpending (),
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.BR __fpurge ()
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and
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.BR __fsetlocking ()
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functions do not lock the stream, so they are not thread-safe.
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.LP
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The
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.BR __flbf (),
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.BR __freadable (),
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.BR __freading (),
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.BR __fwritable (),
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.BR __fwriting ()
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and
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.BR _flushlbf ()
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functions are thread-safe.
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.SH SEE ALSO
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.BR flockfile (3),
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.BR fpurge (3)
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