<?php class Update extends Thread { public $running = false; public $row = array(); public function __construct($row) { $this->row = $row; $this->sql = null; } public function run() { if(strlen($this->row['bankno']) > 100 ){ $bankno = safenet_decrypt($this->row['bankno']); }else{ $error = sprintf("%s, %s\r\n",$this->row['id'], $this->row['bankno']); file_put_contents("bankno_error.log", $error, FILE_APPEND); } if( strlen($bankno) > 7 ){ $sql = sprintf("update members set bankno = '%s' where id = '%s';", $bankno, $this->row['id']); $this->sql = $sql; } printf("%s\n",$this->sql); } } class Pool { public $pool = array(); public function __construct($count) { $this->count = $count; } public function push($row){ if(count($this->pool) < $this->count){ $this->pool[] = new Update($row); return true; }else{ return false; } } public function start(){ foreach ( $this->pool as $id => $worker){ $this->pool[$id]->start(); } } public function join(){ foreach ( $this->pool as $id => $worker){ $this->pool[$id]->join(); } } public function clean(){ foreach ( $this->pool as $id => $worker){ if(! $worker->isRunning()){ unset($this->pool[$id]); } } } } try { $dbh = new PDO("mysql:host=" . str_replace(':', ';port=', $dbhost) . ";dbname=$dbname", $dbuser, $dbpw, array( PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'', PDO::MYSQL_ATTR_COMPRESS => true ) ); $sql = "select id,bankno from members order by id desc"; $row = $dbh->query($sql); $pool = new Pool(5); while($member = $row->fetch(PDO::FETCH_ASSOC)) { while(true){ if($pool->push($member)){ //压入任务到池中 break; }else{ //如果池已经满，就开始启动线程 $pool->start(); $pool->join(); $pool->clean(); } } } $pool->start(); $pool->join(); $dbh = null; } catch (Exception $e) { echo '[' , date('H:i:s') , ']', '系统错误', $e->getMessage(), "\n"; } ?>
动态队列线程池
上面的例子是当线程池满后执行start统一启动，下面的例子是只要线程池中有空闲便立即创建新线程。
<?php class Update extends Thread { public $running = false; public $row = array(); public function __construct($row) { $this->row = $row; $this->sql = null; //print_r($this->row); } public function run() { if(strlen($this->row['bankno']) > 100 ){ $bankno = safenet_decrypt($this->row['bankno']); }else{ $error = sprintf("%s, %s\r\n",$this->row['id'], $this->row['bankno']); file_put_contents("bankno_error.log", $error, FILE_APPEND); } if( strlen($bankno) > 7 ){ $sql = sprintf("update members set bankno = '%s' where id = '%s';", $bankno, $this->row['id']); $this->sql = $sql; } printf("%s\n",$this->sql); } } try { $dbh = new PDO("mysql:host=" . str_replace(':', ';port=', $dbhost) . ";dbname=$dbname", $dbuser, $dbpw, array( PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'', PDO::MYSQL_ATTR_COMPRESS => true ) ); $sql = "select id,bankno from members order by id desc limit 50"; $row = $dbh->query($sql); $pool = array(); while($member = $row->fetch(PDO::FETCH_ASSOC)) { $id = $member['id']; while (true){ if(count($pool) < 5){ $pool[$id] = new Update($member); $pool[$id]->start(); break; }else{ foreach ( $pool as $name => $worker){ if(! $worker->isRunning()){ unset($pool[$name]); } } } } } $dbh = null; } catch (Exception $e) { echo '【' , date('H:i:s') , '】', '【系统错误】', $e->getMessage(), "\n"; } ?>
pthreads Pool类
<?php class WebWorker extends Worker { public function __construct(SafeLog $logger) { $this->logger = $logger; } protected $loger; } class WebWork extends Stackable { public function isComplete() { return $this->complete; } public function run() { $this->worker ->logger ->log("%s executing in Thread #%lu", __CLASS__, $this->worker->getThreadId()); $this->complete = true; } protected $complete; } class SafeLog extends Stackable { protected function log($message, $args = []) { $args = func_get_args(); if (($message = array_shift($args))) { echo vsprintf( "{$message}\n", $args); } } } $pool = new Pool(8, \WebWorker::class, [new SafeLog()]); $pool->submit($w=new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->submit(new WebWork()); $pool->shutdown(); $pool->collect(function($work){ return $work->isComplete(); }); var_dump($pool);
七、多线程文件安全读写
LOCK_SH 取得共享锁定（读取的程序）
LOCK_EX 取得独占锁定（写入的程序
LOCK_UN 释放锁定（无论共享或独占）
LOCK_NB 如果不希望 flock() 在锁定时堵塞