2015-08-19 22:56:00 +02:00
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<?php
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2015-08-29 08:40:10 +02:00
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namespace Icicle\Concurrent\Threading;
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2015-12-05 06:50:32 +01:00
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use Icicle\Concurrent\Sync\Parcel as SyncParcel;
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2015-08-19 22:56:00 +02:00
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/**
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* A thread-safe container that shares a value between multiple threads.
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*/
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2015-12-05 06:50:32 +01:00
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class Parcel implements SyncParcel
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2015-08-19 22:56:00 +02:00
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{
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2015-09-03 00:23:22 +02:00
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/**
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* @var \Icicle\Concurrent\Threading\Mutex
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*/
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2015-08-19 22:56:00 +02:00
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private $mutex;
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2015-09-03 00:23:22 +02:00
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/**
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* @var \Icicle\Concurrent\Threading\Internal\Storage
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*/
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2015-08-29 08:40:10 +02:00
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private $storage;
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2015-08-19 22:56:00 +02:00
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/**
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* Creates a new shared object container.
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*
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* @param mixed $value The value to store in the container.
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*/
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public function __construct($value)
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2015-09-04 01:11:58 +02:00
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{
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$this->init($value);
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}
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/**
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* @param mixed $value
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*/
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private function init($value)
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2015-08-19 22:56:00 +02:00
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{
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2015-08-29 08:40:10 +02:00
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$this->mutex = new Mutex();
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2015-09-04 01:11:58 +02:00
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$this->storage = new Internal\Storage($value);
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2015-08-19 22:56:00 +02:00
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}
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/**
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2015-08-20 21:13:01 +02:00
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* {@inheritdoc}
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2015-08-19 22:56:00 +02:00
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*/
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2015-08-20 21:13:01 +02:00
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public function unwrap()
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2015-08-19 22:56:00 +02:00
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{
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2015-08-29 08:40:10 +02:00
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return $this->storage->get();
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2015-08-19 22:56:00 +02:00
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}
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/**
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2015-08-20 21:13:01 +02:00
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* {@inheritdoc}
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2015-08-19 22:56:00 +02:00
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*/
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2015-10-18 09:12:46 +02:00
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protected function wrap($value)
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2015-08-19 22:56:00 +02:00
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{
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2015-08-29 08:40:10 +02:00
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$this->storage->set($value);
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2015-08-19 22:56:00 +02:00
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}
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/**
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2015-08-29 08:40:10 +02:00
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* @coroutine
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*
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2015-09-04 01:11:58 +02:00
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* Asynchronously invokes a callable while maintaining an exclusive lock on the container.
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2015-08-19 22:56:00 +02:00
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*
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2015-09-04 01:11:58 +02:00
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* @param callable<mixed> $callback The function to invoke. The value in the container will be passed as the first
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* argument.
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2015-08-19 22:56:00 +02:00
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*
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* @return \Generator
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*/
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2015-09-04 01:11:58 +02:00
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public function synchronized(callable $callback)
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2015-08-19 22:56:00 +02:00
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{
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2015-08-29 08:40:10 +02:00
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/** @var \Icicle\Concurrent\Sync\Lock $lock */
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2015-08-19 22:56:00 +02:00
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$lock = (yield $this->mutex->acquire());
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try {
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2015-10-18 09:12:46 +02:00
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$value = $this->unwrap();
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$result = (yield $callback($value));
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$this->wrap(null === $result ? $value : $result);
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2015-08-19 22:56:00 +02:00
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} finally {
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$lock->release();
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}
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}
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2015-08-20 21:13:01 +02:00
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/**
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* {@inheritdoc}
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*/
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public function __clone()
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{
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2015-09-04 01:11:58 +02:00
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$this->init($this->unwrap());
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2015-08-20 21:13:01 +02:00
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}
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2015-08-19 22:56:00 +02:00
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}
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