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thinkphp/library/think/process/pipes/Pipes.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2015 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: yunwuxin <448901948@qq.com>
+// +----------------------------------------------------------------------
+
+namespace think\process\pipes;
+
+abstract class Pipes
+{
+
+    /** @var array */
+    public $pipes = [];
+
+    /** @var string */
+    protected $inputBuffer = '';
+    /** @var resource|null */
+    protected $input;
+
+    /** @var bool */
+    private $blocked = true;
+
+    const CHUNK_SIZE = 16384;
+
+    /**
+     * 返回用于 proc_open 描述符的数组
+     * @return array
+     */
+    abstract public function getDescriptors();
+
+    /**
+     * 返回一个数组的索引由其相关的流，以防这些管道使用的临时文件的文件名。
+     * @return string[]
+     */
+    abstract public function getFiles();
+
+    /**
+     * 文件句柄和管道中读取数据。
+     * @param bool $blocking 是否使用阻塞调用
+     * @param bool $close    是否要关闭管道，如果他们已经到达 EOF。
+     * @return string[]
+     */
+    abstract public function readAndWrite($blocking, $close = false);
+
+    /**
+     * 返回当前状态如果有打开的文件句柄或管道。
+     * @return bool
+     */
+    abstract public function areOpen();
+
+    /**
+     * {@inheritdoc}
+     */
+    public function close()
+    {
+        foreach ($this->pipes as $pipe) {
+            fclose($pipe);
+        }
+        $this->pipes = [];
+    }
+
+    /**
+     * 检查系统调用已被中断
+     * @return bool
+     */
+    protected function hasSystemCallBeenInterrupted()
+    {
+        $lastError = error_get_last();
+
+        return isset($lastError['message']) && false !== stripos($lastError['message'], 'interrupted system call');
+    }
+
+    protected function unblock()
+    {
+        if (!$this->blocked) {
+            return;
+        }
+
+        foreach ($this->pipes as $pipe) {
+            stream_set_blocking($pipe, 0);
+        }
+        if (null !== $this->input) {
+            stream_set_blocking($this->input, 0);
+        }
+
+        $this->blocked = false;
+    }
+}