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externals/JAXL/core/jaxl_loop.php
- This file was added.
<?php | |||||
/** | |||||
* Jaxl (Jabber XMPP Library) | |||||
* | |||||
* Copyright (c) 2009-2012, Abhinav Singh <me@abhinavsingh.com>. | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* | |||||
* * Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* | |||||
* * Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in | |||||
* the documentation and/or other materials provided with the | |||||
* distribution. | |||||
* | |||||
* * Neither the name of Abhinav Singh nor the names of his | |||||
* contributors may be used to endorse or promote products derived | |||||
* from this software without specific prior written permission. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
* POSSIBILITY OF SUCH DAMAGE. | |||||
* | |||||
*/ | |||||
require_once JAXL_CWD.'/core/jaxl_logger.php'; | |||||
require_once JAXL_CWD.'/core/jaxl_clock.php'; | |||||
/** | |||||
* | |||||
* Enter description here ... | |||||
* @author abhinavsingh | |||||
* | |||||
*/ | |||||
class JAXLLoop { | |||||
public static $clock = null; | |||||
private static $is_running = false; | |||||
private static $active_read_fds = 0; | |||||
private static $active_write_fds = 0; | |||||
private static $read_fds = array(); | |||||
private static $read_cbs = array(); | |||||
private static $write_fds = array(); | |||||
private static $write_cbs = array(); | |||||
public static $secs = 0; | |||||
public static $usecs = 30000; | |||||
private function __construct() {} | |||||
private function __clone() {} | |||||
public static function watch($fd, $opts) { | |||||
if(isset($opts['read'])) { | |||||
$fdid = (int) $fd; | |||||
self::$read_fds[$fdid] = $fd; | |||||
self::$read_cbs[$fdid] = $opts['read']; | |||||
++self::$active_read_fds; | |||||
} | |||||
if(isset($opts['write'])) { | |||||
$fdid = (int) $fd; | |||||
self::$write_fds[$fdid] = $fd; | |||||
self::$write_cbs[$fdid] = $opts['write']; | |||||
++self::$active_write_fds; | |||||
} | |||||
_debug("active read fds: ".self::$active_read_fds.", write fds: ".self::$active_write_fds); | |||||
} | |||||
public static function unwatch($fd, $opts) { | |||||
if(isset($opts['read'])) { | |||||
$fdid = (int) $fd; | |||||
if(isset(self::$read_fds[$fdid])) { | |||||
unset(self::$read_fds[$fdid]); | |||||
unset(self::$read_cbs[$fdid]); | |||||
--self::$active_read_fds; | |||||
} | |||||
} | |||||
if(isset($opts['write'])) { | |||||
$fdid = (int) $fd; | |||||
if(isset(self::$write_fds[$fdid])) { | |||||
unset(self::$write_fds[$fdid]); | |||||
unset(self::$write_cbs[$fdid]); | |||||
--self::$active_write_fds; | |||||
} | |||||
} | |||||
_debug("active read fds: ".self::$active_read_fds.", write fds: ".self::$active_write_fds); | |||||
} | |||||
public static function run() { | |||||
if(!self::$is_running) { | |||||
self::$is_running = true; | |||||
self::$clock = new JAXLClock(); | |||||
while((self::$active_read_fds + self::$active_write_fds) > 0) | |||||
self::select(); | |||||
_debug("no more active fd's to select"); | |||||
self::$is_running = false; | |||||
} | |||||
} | |||||
public static function select() { | |||||
$read = self::$read_fds; | |||||
$write = self::$write_fds; | |||||
$except = null; | |||||
$changed = @stream_select($read, $write, $except, self::$secs, self::$usecs); | |||||
if($changed === false) { | |||||
_error("error in the event loop, shutting down..."); | |||||
/*foreach(self::$read_fds as $fd) { | |||||
if(is_resource($fd)) | |||||
print_r(stream_get_meta_data($fd)); | |||||
}*/ | |||||
exit; | |||||
} | |||||
else if($changed > 0) { | |||||
// read callback | |||||
foreach($read as $r) { | |||||
$fdid = array_search($r, self::$read_fds); | |||||
if(isset(self::$read_fds[$fdid])) | |||||
call_user_func(self::$read_cbs[$fdid], self::$read_fds[$fdid]); | |||||
} | |||||
// write callback | |||||
foreach($write as $w) { | |||||
$fdid = array_search($w, self::$write_fds); | |||||
if(isset(self::$write_fds[$fdid])) | |||||
call_user_func(self::$write_cbs[$fdid], self::$write_fds[$fdid]); | |||||
} | |||||
self::$clock->tick(); | |||||
} | |||||
else if($changed === 0) { | |||||
//_debug("nothing changed while selecting for read"); | |||||
self::$clock->tick((self::$secs * pow(10,6)) + self::$usecs); | |||||
} | |||||
} | |||||
} | |||||
?> |