php pthreads の使用方法: 1. 「pecl install pthreads」を通じて pthreads をインストールします; 2. 複数のスレッドを制御する必要があり、同時に 1 つのスレッドのみが動作できる場合は、mutex ロックを使用します。
この記事の動作環境：Windows7システム、php7.0.2バージョン、DELL G3コンピュータ
phpのインストールと使い方マルチスレッド pthreads
Pthreads をインストールするには、基本的に PHP を再コンパイルして --enable-maintainer-zts パラメータを追加する必要がありますが、これを使用するためのドキュメントはほとんどありません。運用環境です。笑えるだけなので、これを試してみてください。実際のマルチスレッドの場合は、やはり Python、C などを使用する必要があります。
次のコードのほとんどはインターネットから取得したものです
ここで使用するのは php-7.0.2
./configure \ --prefix=/usr/local/php7 \ --with-config-file-path=/etc \ --with-config-file-scan-dir=/etc/php.d \ --enable-debug \ --enable-maintainer-zts \ --enable-pcntl \ --enable-fpm \ --enable-opcache \ --enable-embed=shared \ --enable-json=shared \ --enable-phpdbg \ --with-curl=shared \ --with-mysql=/usr/local/mysql \ --with-mysqli=/usr/local/mysql/bin/mysql_config \ --with-pdo-mysql make && make install
pthreads
pecl install pthreads
4. ミューテックス ロック<?php #1 $thread = new class extends Thread { public function run() { echo "Hello World {$this->getThreadId()}\n"; } }; $thread->start() && $thread->join(); #2 class workerThread extends Thread { public function __construct($i){ $this->i=$i; } public function run(){ while(true){ echo $this->i."\n"; sleep(1); } } } for($i=0;$i<50;$i++){ $workers[$i]=new workerThread($i); $workers[$i]->start(); } ?>ログイン後にコピー
<?php
class SQLQuery extends Stackable {
public function __construct($sql) {
$this->sql = $sql;
}
public function run() {
$dbh = $this->worker->getConnection();
$row = $dbh->query($this->sql);
while($member = $row->fetch(PDO::FETCH_ASSOC)){
print_r($member);
}
}
}
class ExampleWorker extends Worker {
public static $dbh;
public function __construct($name) {
}
public function run(){
self::$dbh = new PDO('mysql:host=10.0.0.30;dbname=testdb','root','123456');
}
public function getConnection(){
return self::$dbh;
}
}
$worker = new ExampleWorker("My Worker Thread");
$sql1 = new SQLQuery('select * from test order by id desc limit 1,5');
$worker->stack($sql1);
$sql2 = new SQLQuery('select * from test order by id desc limit 5,5');
$worker->stack($sql2);
$worker->start();
$worker->shutdown();
?>複数のスレッドと共有メモリ
<?php
$counter = 0;
$handle=fopen("/tmp/counter.txt", "w");
fwrite($handle, $counter );
fclose($handle);
class CounterThread extends Thread {
public function __construct($mutex = null){
$this->mutex = $mutex;
$this->handle = fopen("/tmp/counter.txt", "w+");
}
public function __destruct(){
fclose($this->handle);
}
public function run() {
if($this->mutex)
$locked=Mutex::lock($this->mutex);
$counter = intval(fgets($this->handle));
$counter++;
rewind($this->handle);
fputs($this->handle, $counter );
printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
if($this->mutex)
Mutex::unlock($this->mutex);
}
}
//没有互斥锁
for ($i=0;$i<50;$i++){
$threads[$i] = new CounterThread();
$threads[$i]->start();
}
//加入互斥锁
$mutex = Mutex::create(true);
for ($i=0;$i<50;$i++){
$threads[$i] = new CounterThread($mutex);
$threads[$i]->start();
}
Mutex::unlock($mutex);
for ($i=0;$i<50;$i++){
$threads[$i]->join();
}
Mutex::destroy($mutex);
?>5. スレッドの同期
<?php
$tmp = tempnam(__FILE__, 'PHP');
$key = ftok($tmp, 'a');
$shmid = shm_attach($key);
$counter = 0;
shm_put_var( $shmid, 1, $counter );
class CounterThread extends Thread {
public function __construct($shmid){
$this->shmid = $shmid;
}
public function run() {
$counter = shm_get_var( $this->shmid, 1 );
$counter++;
shm_put_var( $this->shmid, 1, $counter );
printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
}
}
for ($i=0;$i<100;$i++){
$threads[] = new CounterThread($shmid);
}
for ($i=0;$i<100;$i++){
$threads[$i]->start();
}
for ($i=0;$i<100;$i++){
$threads[$i]->join();
}
shm_remove( $shmid );
shm_detach( $shmid );
?><?php
$tmp = tempnam(__FILE__, 'PHP');
$key = ftok($tmp, 'a');
$shmid = shm_attach($key);
$counter = 0;
shm_put_var( $shmid, 1, $counter );
class CounterThread extends Thread {
public function __construct($shmid){
$this->shmid = $shmid;
}
public function run() {
$this->synchronized(function($thread){
$thread->wait();
}, $this);
$counter = shm_get_var( $this->shmid, 1 );
$counter++;
shm_put_var( $this->shmid, 1, $counter );
printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
}
}
for ($i=0;$i<100;$i++){
$threads[] = new CounterThread($shmid);
}
for ($i=0;$i<100;$i++){
$threads[$i]->start();
}
for ($i=0;$i<100;$i++){
$threads[$i]->synchronized(function($thread){
$thread->notify();
}, $threads[$i]);
}
for ($i=0;$i<100;$i++){
$threads[$i]->join();
}
shm_remove( $shmid );
shm_detach( $shmid );
?> <?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";
}
?><?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";
}
?> #LOCK_EX 排他ロックの取得 (プログラムの書き込み)
#LOCK_UN ロックの解放 (共有か排他かを問わず)
LOCK_NB ロック中に flock() をブロックしたくない場合
<?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); 8. マルチスレッドとデータ接続
<?php
$fp = fopen("/tmp/lock.txt", "r+");
if (flock($fp, LOCK_EX)) { // 进行排它型锁定
ftruncate($fp, 0); // truncate file
fwrite($fp, "Write something here\n");
fflush($fp); // flush output before releasing the lock
flock($fp, LOCK_UN); // 释放锁定
} else {
echo "Couldn't get the lock!";
}
fclose($fp);
$fp = fopen('/tmp/lock.txt', 'r+');
if(!flock($fp, LOCK_EX | LOCK_NB)) {
echo 'Unable to obtain lock';
exit(-1);
}
fclose($fp);
?><?php
class Work extends Stackable {
public function __construct() {
}
public function run() {
$dbh = $this->worker->getConnection();
$sql = "select id,name from members order by id desc limit 50";
$row = $dbh->query($sql);
while($member = $row->fetch(PDO::FETCH_ASSOC)){
print_r($member);
}
}
}
class ExampleWorker extends Worker {
public static $dbh;
public function __construct($name) {
}
/*
* The run method should just prepare the environment for the work that is coming ...
*/
public function run(){
self::$dbh = new PDO('mysql:host=192.168.2.1;dbname=example','www','123456');
}
public function getConnection(){
return self::$dbh;
}
}
$worker = new ExampleWorker("My Worker Thread");
$work=new Work();
$worker->stack($work);
$worker->start();
$worker->shutdown();
?>マルチスレッドで動作するデータベースの概要
# cat pool.php
<?php
class ExampleWorker extends Worker {
public function __construct(Logging $logger) {
$this->logger = $logger;
}
protected $logger;
}
/* the collectable class implements machinery for Pool::collect */
class Work extends Stackable {
public function __construct($number) {
$this->number = $number;
}
public function run() {
$dbhost = 'db.example.com'; // 数据库服务器
$dbuser = 'example.com'; // 数据库用户名
$dbpw = 'password'; // 数据库密码
$dbname = 'example_real';
$dbh = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'',
PDO::MYSQL_ATTR_COMPRESS => true,
PDO::ATTR_PERSISTENT => true
)
);
$sql = "select OPEN_TIME, `COMMENT` from MT4_TRADES where LOGIN='".$this->number['name']."' and CMD='6' and `COMMENT` = '".$this->number['order'].":DEPOSIT'";
#echo $sql;
$row = $dbh->query($sql);
$mt4_trades = $row->fetch(PDO::FETCH_ASSOC);
if($mt4_trades){
$row = null;
$sql = "UPDATE db_example.accounts SET paystatus='成功', deposit_time='".$mt4_trades['OPEN_TIME']."' where `order` = '".$this->number['order']."';";
$dbh->query($sql);
#printf("%s\n",$sql);
}
$dbh = null;
printf("runtime: %s, %s, %s\n", date('Y-m-d H:i:s'), $this->worker->getThreadId() ,$this->number['order']);
}
}
class Logging extends Stackable {
protected static $dbh;
public function __construct() {
$dbhost = 'db.example.com'; // 数据库服务器
$dbuser = 'example.com'; // 数据库用户名
$dbpw = 'password'; // 数据库密码
$dbname = 'example_real'; // 数据库名
self::$dbh = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'',
PDO::MYSQL_ATTR_COMPRESS => true
)
);
}
protected function log($message, $args = []) {
$args = func_get_args();
if (($message = array_shift($args))) {
echo vsprintf("{$message}\n", $args);
}
}
protected function getConnection(){
return self::$dbh;
}
}
$pool = new Pool(200, \ExampleWorker::class, [new Logging()]);
$dbhost = 'db.example.com'; // 数据库服务器
$dbuser = 'example.com'; // 数据库用户名
$dbpw = 'password'; // 数据库密码
$dbname = 'db_example';
$dbh = new PDO("mysql:host=$dbhost;port=3306;dbname=$dbname", $dbuser, $dbpw, array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\'',
PDO::MYSQL_ATTR_COMPRESS => true
)
);
$sql = "select `order`,name from accounts where deposit_time is null order by id desc";
$row = $dbh->query($sql);
while($account = $row->fetch(PDO::FETCH_ASSOC))
{
$pool->submit(new Work($account));
}
$pool->shutdown();
?> 推奨される学習: "
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