[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / man / man3 / IO::Poll.3

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.\" ========================================================================
.\"
.IX Title "IO::Poll 3"
.TH IO::Poll 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
.SH "NAME"
IO::Poll \- Object interface to system poll call
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);
.Ve
.PP
.Vb 1
\&    $poll = new IO::Poll;
.Ve
.PP
.Vb 2
\&    $poll->mask($input_handle => POLLIN);
\&    $poll->mask($output_handle => POLLOUT);
.Ve
.PP
.Vb 1
\&    $poll->poll($timeout);
.Ve
.PP
.Vb 1
\&    $ev = $poll->events($input);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`IO::Poll\*(C'\fR is a simple interface to the system level poll routine.
.SH "METHODS"
.IX Header "METHODS"
.IP "mask ( \s-1IO\s0 [, \s-1EVENT_MASK\s0 ] )" 4
.IX Item "mask ( IO [, EVENT_MASK ] )"
If \s-1EVENT_MASK\s0 is given, then, if \s-1EVENT_MASK\s0 is non\-zero, \s-1IO\s0 is added to the
list of file descriptors and the next call to poll will check for
any event specified in \s-1EVENT_MASK\s0. If \s-1EVENT_MASK\s0 is zero then \s-1IO\s0 will be
removed from the list of file descriptors.
.Sp
If \s-1EVENT_MASK\s0 is not given then the return value will be the current
event mask value for \s-1IO\s0.
.IP "poll ( [ \s-1TIMEOUT\s0 ] )" 4
.IX Item "poll ( [ TIMEOUT ] )"
Call the system level poll routine. If \s-1TIMEOUT\s0 is not specified then the
call will block. Returns the number of handles which had events
happen, or \-1 on error.
.IP "events ( \s-1IO\s0 )" 4
.IX Item "events ( IO )"
Returns the event mask which represents the events that happened on \s-1IO\s0
during the last call to \f(CW\*(C`poll\*(C'\fR.
.IP "remove ( \s-1IO\s0 )" 4
.IX Item "remove ( IO )"
Remove \s-1IO\s0 from the list of file descriptors for the next poll.
.IP "handles( [ \s-1EVENT_MASK\s0 ] )" 4
.IX Item "handles( [ EVENT_MASK ] )"
Returns a list of handles. If \s-1EVENT_MASK\s0 is not given then a list of all
handles known will be returned. If \s-1EVENT_MASK\s0 is given then a list
of handles will be returned which had one of the events specified by
\&\s-1EVENT_MASK\s0 happen during the last call ti \f(CW\*(C`poll\*(C'\fR
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIpoll\fR\|(2), IO::Handle, IO::Select
.SH "AUTHOR"
.IX Header "AUTHOR"
Graham Barr. Currently maintained by the Perl Porters.  Please report all
bugs to <perl5\-porters@perl.org>.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 1997\-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
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	4	.\" ========================================================================
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	28	.\" double quote, and \*(R" will give a right double quote. \| will give a
	29	.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used to
	30	.\" do unbreakable dashes and therefore won't be available. \(C` and \(C'
	31	.\" expand to `' in nroff, nothing in troff, for use with C<>.
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	54	.\" output yourself in some meaningful fashion.
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129	.\" ========================================================================
130	.\"
131	.IX Title "IO::Poll 3"
132	.TH IO::Poll 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
133	.SH "NAME"
134	IO::Poll \- Object interface to system poll call
135	.SH "SYNOPSIS"
136	.IX Header "SYNOPSIS"
137	.Vb 1
138	\& use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP);
139	.Ve
140	.PP
141	.Vb 1
142	\& $poll = new IO::Poll;
143	.Ve
144	.PP
145	.Vb 2
146	\& $poll->mask($input_handle => POLLIN);
147	\& $poll->mask($output_handle => POLLOUT);
148	.Ve
149	.PP
150	.Vb 1
151	\& $poll->poll($timeout);
152	.Ve
153	.PP
154	.Vb 1
155	\& $ev = $poll->events($input);
156	.Ve
157	.SH "DESCRIPTION"
158	.IX Header "DESCRIPTION"
159	\&\f(CW\(C`IO::Poll\(C'\fR is a simple interface to the system level poll routine.
160	.SH "METHODS"
161	.IX Header "METHODS"
162	.IP "mask ( \s-1IO\s0 [, \s-1EVENT_MASK\s0 ] )" 4
163	.IX Item "mask ( IO [, EVENT_MASK ] )"
164	If \s-1EVENT_MASK\s0 is given, then, if \s-1EVENT_MASK\s0 is non\-zero, \s-1IO\s0 is added to the
165	list of file descriptors and the next call to poll will check for
166	any event specified in \s-1EVENT_MASK\s0. If \s-1EVENT_MASK\s0 is zero then \s-1IO\s0 will be
167	removed from the list of file descriptors.
168	.Sp
169	If \s-1EVENT_MASK\s0 is not given then the return value will be the current
170	event mask value for \s-1IO\s0.
171	.IP "poll ( [ \s-1TIMEOUT\s0 ] )" 4
172	.IX Item "poll ( [ TIMEOUT ] )"
173	Call the system level poll routine. If \s-1TIMEOUT\s0 is not specified then the
174	call will block. Returns the number of handles which had events
175	happen, or \-1 on error.
176	.IP "events ( \s-1IO\s0 )" 4
177	.IX Item "events ( IO )"
178	Returns the event mask which represents the events that happened on \s-1IO\s0
179	during the last call to \f(CW\(C`poll\(C'\fR.
180	.IP "remove ( \s-1IO\s0 )" 4
181	.IX Item "remove ( IO )"
182	Remove \s-1IO\s0 from the list of file descriptors for the next poll.
183	.IP "handles( [ \s-1EVENT_MASK\s0 ] )" 4
184	.IX Item "handles( [ EVENT_MASK ] )"
185	Returns a list of handles. If \s-1EVENT_MASK\s0 is not given then a list of all
186	handles known will be returned. If \s-1EVENT_MASK\s0 is given then a list
187	of handles will be returned which had one of the events specified by
188	\&\s-1EVENT_MASK\s0 happen during the last call ti \f(CW\(C`poll\(C'\fR
189	.SH "SEE ALSO"
190	.IX Header "SEE ALSO"
191	\&\fIpoll\fR\\|(2), IO::Handle, IO::Select
192	.SH "AUTHOR"
193	.IX Header "AUTHOR"
194	Graham Barr. Currently maintained by the Perl Porters. Please report all
195	bugs to <perl5\-porters@perl.org>.
196	.SH "COPYRIGHT"
197	.IX Header "COPYRIGHT"
198	Copyright (c) 1997\-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
199	This program is free software; you can redistribute it and/or
200	modify it under the same terms as Perl itself.