<?php

namespace Amp;

/**
 * A deferred cancellation provides a mechanism to cancel operations dynamically.
 *
 * Cancellation of operation works by creating a deferred cancellation and passing the corresponding cancellation when
 * starting the operation. To cancel the operation, invoke `DeferredCancellation::cancel()`.
 *
 * Any operation can decide what to do on a cancellation request, it has "don't care" semantics. An operation SHOULD be
 * aborted, but MAY continue. Example: A DNS client might continue to receive and cache the response, as the query has
 * been sent anyway. An HTTP client would usually close a connection, but might not do so in case a response is close to
 * be fully received to reuse the connection.
 *
 * **Example**
 *
 * ```php
 * $deferredCancellation = new DeferredCancellation;
 * $cancellation = $deferredCancellation->getCancellation();
 *
 * $response = $httpClient->request("https://example.com/pipeline", $cancellation);
 * $responseBody = $response->getBody();
 *
 * while (null !== $chunk = $response->read()) {
 *     // consume $chunk
 *
 *     if ($noLongerInterested) {
 *         $deferredCancellation->cancel();
 *         break;
 *     }
 * }
 * ```
 *
 * @see Cancellation
 * @see CancelledException
 */
final class DeferredCancellation
{
	use ForbidCloning;
	use ForbidSerialization;

	private readonly Internal\Cancellable $source;
	private readonly Cancellation $cancellation;


	public function __construct()
	{
		$this->source = new Internal\Cancellable;
		$this->cancellation = new Internal\WrappedCancellation($this->source);
	}


	public function __destruct()
	{
		$this->source->cancel();
	}


	public function getCancellation(): Cancellation
	{
		return $this->cancellation;
	}


	public function isCancelled(): bool
	{
		return $this->source->isRequested();
	}


	/**
	 * @param \Throwable|null $previous Exception to be used as the previous exception to CancelledException.
	 */
	public function cancel(?\Throwable $previous = null): void
	{
		$this->source->cancel($previous);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NDAwOTAzMTQ1MDc5OTg5OSA2NjA5NTQwNjEyMDYwMzU2IDkyNDUzNzE1MjA0MDIzODM=