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<?php
/** @noinspection PhpElementIsNotAvailableInCurrentPhpVersionInspection */
declare(strict_types=1);
namespace OpenTelemetry\Context;
use function assert;
use function class_exists;
use const E_USER_WARNING;
use Fiber;
use function trigger_error;
/**
* @internal
*
* @phan-file-suppress PhanUndeclaredClassReference
* @phan-file-suppress PhanUndeclaredClassMethod
*/
final class FiberBoundContextStorage implements ContextStorageInterface, ExecutionContextAwareInterface
{
/** @var ContextStorageInterface&ExecutionContextAwareInterface */
private ContextStorageInterface $storage;
/**
* @param ContextStorageInterface&ExecutionContextAwareInterface $storage
*/
public function __construct(ContextStorageInterface $storage)
{
$this->storage = $storage;
}
public function fork($id): void
{
$this->storage->fork($id);
}
public function switch($id): void
{
$this->storage->switch($id);
}
public function destroy($id): void
{
$this->storage->destroy($id);
}
public function scope(): ?ContextStorageScopeInterface
{
$this->checkFiberMismatch();
if (($scope = $this->storage->scope()) === null) {
return null;
}
return new FiberBoundContextStorageScope($scope);
}
public function current(): ContextInterface
{
$this->checkFiberMismatch();
return $this->storage->current();
}
public function attach(ContextInterface $context): ContextStorageScopeInterface
{
$scope = $this->storage->attach($context);
assert(class_exists(Fiber::class, false));
$scope[Fiber::class] = Fiber::getCurrent();
return new FiberBoundContextStorageScope($scope);
}
private function checkFiberMismatch(): void
{
$scope = $this->storage->scope();
assert(class_exists(Fiber::class, false));
if ($scope && $scope[Fiber::class] !== Fiber::getCurrent()) {
trigger_error('Fiber context switching not supported', E_USER_WARNING);
}
}
}
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