93 lines
2.1 KiB
PHP
93 lines
2.1 KiB
PHP
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<?php
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declare(strict_types=1);
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namespace OpenTelemetry\Context;
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use function assert;
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/**
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* @internal
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*/
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final class ContextStorageNode implements ScopeInterface, ContextStorageScopeInterface
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{
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public ContextInterface $context;
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public ContextStorageHead $head;
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private ?ContextStorageNode $previous;
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private array $localStorage = [];
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public function __construct(
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ContextInterface $context,
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ContextStorageHead $head,
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?ContextStorageNode $previous = null
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) {
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$this->context = $context;
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$this->head = $head;
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$this->previous = $previous;
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}
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public function offsetExists($offset): bool
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{
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return isset($this->localStorage[$offset]);
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}
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/**
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* @phan-suppress PhanUndeclaredClassAttribute
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*/
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#[\ReturnTypeWillChange]
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public function offsetGet($offset)
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{
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return $this->localStorage[$offset];
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}
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public function offsetSet($offset, $value): void
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{
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$this->localStorage[$offset] = $value;
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}
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public function offsetUnset($offset): void
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{
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unset($this->localStorage[$offset]);
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}
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public function context(): ContextInterface
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{
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return $this->context;
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}
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public function detach(): int
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{
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$flags = 0;
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if ($this->head !== $this->head->storage->current) {
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$flags |= ScopeInterface::INACTIVE;
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}
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if ($this === $this->head->node) {
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assert($this->previous !== $this);
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$this->head->node = $this->previous;
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$this->previous = $this;
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return $flags;
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}
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if ($this->previous === $this) {
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return $flags | ScopeInterface::DETACHED;
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}
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assert($this->head->node !== null);
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for ($n = $this->head->node, $depth = 1;
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$n->previous !== $this;
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$n = $n->previous, $depth++) {
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assert($n->previous !== null);
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}
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$n->previous = $this->previous;
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$this->previous = $this;
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return $flags | ScopeInterface::MISMATCH | $depth;
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}
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private function __clone()
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{
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}
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}
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