getc_unlocked, getchar_unlocked - get next character from
The getc_unlocked() and getchar_unlocked() functions are
their locked counterparts, getc(3) and getchar(3). However,
getc_unlocked() and getchar_unlocked() assume that the relevant stream
has either been previously locked with flockfile(3), or that
it will not
be accessed by any other thread.
The return values are as described for getc(3) and
getc_unlocked() and getchar_unlocked() conform to ISO/IEC
(``POSIX'') Std 1003.1 Second Edition 1996-07-12.
OpenBSD 3.6 March 20, 1999
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