Description:
------------
[root@localhost examples]# /usr/local/php-zts/bin/php SQLWorker.php localhost root "" test "select now()"
PHP Warning:  mysql_connect(): No such file or directory in /root/pthreads/pthreads-2.0.10/examples/SQLWorker.php on line 42
Segmentation fault (core dumped)

But, SharingResources.php works well.

More:
[root@localhost examples]# /usr/local/php-zts/bin/php -v           
PHP 5.6.11 (cli) (built: Jul 15 2015 04:45:02) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies

phpinfo()
PHP Version => 5.6.11

System => Linux localhost.localdomain 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64
Build Date => Jul 15 2015 04:38:47
Configure Command =>  './configure'  '--prefix=/usr/local/php-zts' '--with-config-file-path=/usr/local/php-zts/etc' '--enable-fpm' '--with-fpm-user=apache' '--with-fpm-group=apa
che' '--enable-mbstring' '--enable-xml' '--with-mysql' '--with-mysqli' '--with-iconv-dir' '--enable-maintainer-zts' '--enable-zip' '--enable-pcntl' '--enable-sockets'
Server API => Command Line Interface
Virtual Directory Support => enabled


Test script:
---------------
<?php
class SQLQuery extends Stackable {
	
	public function __construct($sql) { 
		$this->sql = $sql; 
	}
	public function run() {
		/** included in 0.0.37 is access to the real worker object for stackables **/
		if ($this->worker->isReady()) {
			$result = mysql_query($this->sql, $this->worker->getConnection());  
			if ($result) {
				while(($row = mysql_fetch_assoc($result))){
					/** $this->rows[]=$row; segfaults */
					/** you could array_merge, but the fastest thing to do is what I'm doing here */
					/** even when the segfault is fixed this will still be the best thing to do as writing to the object scope will always cause locking */
					/** but the method scope isn't shared, just like the global scope **/
					$rows[]=$row;
				}
				mysql_free_result($result);
			} else printf("%s got no result\n", __CLASS__);
		} else printf("%s not ready\n", $this->worker->getConnection());
		$this->rows = $rows;
		$this->notify();
	}
	
	protected function getResults() { return $this->rows; }
}

class SQLWorker extends Worker {
	public $mysql;	
	
	public function __construct($host, $user, $pass, $db) {
		$this->host = $host;
		$this->user = $user;
		$this->pass = $pass;
		$this->db = $db;
		$this->ready = false;
		$this->name = null;
	}
	public function run() {
		$this->setName(sprintf("%s (%lu)", __CLASS__, $this->getThreadId()));
		if (($this->mysql = mysql_connect($this->host, $this->user, $this->pass))) {
			$this->ready = (boolean) mysql_select_db($this->db, $this->mysql);
		}
	}
	public function getConnection(){ return $this->mysql; }
	protected function isReady($flag = null) { 
		if (is_null($flag)) {
			return $this->ready;
		} else $this->ready = $flag;
	}
	public function setName($name) 	{ $this->name = $name;}
	public function getName() 		{ return $this->name; }
}

if (count($argv) == 6) {
	$sql = new SQLWorker($argv[1], $argv[2], $argv[3], $argv[4]);
	$sql->start();
	$query = new SQLQuery($argv[5]);
	$sql->stack($query);
	$query->wait();
	print_r($query->getResults());
} else printf("usage: {$argv[0]} hostname username password database query\n");
?>


Expected result:
----------------
1111

Actual result:
--------------
0000