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-rw-r--r-- | io.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -8486,6 +8486,12 @@ rb_io_advise(int argc, VALUE *argv, VALUE io) * if optional <i>timeout</i> value is given and no <code>IO</code> object * is ready in <i>timeout</i> seconds. * + * <code>IO.select</code> peeks the buffer of <code>IO</code> objects for testing readability. + * If the <code>IO</code> buffer is not empty, + * <code>IO.select</code> immediately notify readability. + * This "peek" is only happen for <code>IO</code> objects. + * It is not happen for IO-like objects such as OpenSSL::SSL::SSLSocket. + * * The best way to use <code>IO.select</code> is invoking it * after nonblocking methods such as <code>read_nonblock</code>. * The methods raises an exception which is extended by |