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29 lines
822 B
Plaintext
29 lines
822 B
Plaintext
@node usleep
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@section @code{usleep}
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@findex usleep
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POSIX specification: @url{http://www.opengroup.org/susv3xsh/usleep.html}
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Gnulib module: usleep
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Portability problems fixed by Gnulib:
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@itemize
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@item
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On some systems, @code{usleep} rejects attempts to sleep longer than 1
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second, as allowed by POSIX:
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mingw.
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@item
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This function is missing on some platforms. However, the replacement
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is designed to be lightweight, and may round to the nearest second;
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use @code{select} or @code{nanosleep} if better resolution is needed:
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IRIX 5.3, Solaris 2.4, older mingw, MSVC 9, BeOS.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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According to POSIX, the @code{usleep} function may interfere with the program's
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use of the @code{SIGALRM} signal. On Linux, it doesn't; on other platforms,
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it may.
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@end itemize
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