Acquires the vector's mutex lock

# pht\Vector::lock

(PECL pht >= 0.0.1)

pht\Vector::lock — Acquires the vector's mutex lock

### 説明

public pht\Vector::lock ( void ) : void

This method will acquire the mutex lock associated with the vector. The mutex lock should always be acquired when manipulating the vector if it is being used by multiple threads.

The mutex locks of the Inter-Thread Communication (ITC) data structures are not reentrant. Attempting to reacquire an already-acquired mutex lock by the same thread will therefore cause a deadlock.

### パラメータ

この関数にはパラメータはありません。

### 返り値

No return value.

### 例

例1 Locking a vector's mutex lock

`<?php
use pht\{Thread, Vector};
$thread = new Thread();
$vector = new Vector();
$thread->addFunctionTask(function ($vector) {
$vector->lock();
$vector[] = 1;
$vector->unlock();
}, $vector);
$thread->start();
// $vector is currently being used by multiple threads
$vector->lock();
$vector[] = 2;
$vector->unlock();
$thread->join();`