1 files changed, 92 insertions, 0 deletions
diff --git a/vendor/open-telemetry/context/ContextStorageNode.php b/vendor/open-telemetry/context/ContextStorageNode.php
new file mode 100644
index 000000000..12d521660
--- /dev/null
+++ b/vendor/open-telemetry/context/ContextStorageNode.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\Context;
+
+use function assert;
+
+/**
+ * @internal
+ */
+final class ContextStorageNode implements ScopeInterface, ContextStorageScopeInterface
+{
+    public ContextInterface $context;
+    public ContextStorageHead $head;
+    private ?ContextStorageNode $previous;
+    private array $localStorage = [];
+
+    public function __construct(
+        ContextInterface $context,
+        ContextStorageHead $head,
+        ?ContextStorageNode $previous = null
+    ) {
+        $this->context = $context;
+        $this->head = $head;
+        $this->previous = $previous;
+    }
+
+    public function offsetExists($offset): bool
+    {
+        return isset($this->localStorage[$offset]);
+    }
+
+    /**
+     * @phan-suppress PhanUndeclaredClassAttribute
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->localStorage[$offset];
+    }
+
+    public function offsetSet($offset, $value): void
+    {
+        $this->localStorage[$offset] = $value;
+    }
+
+    public function offsetUnset($offset): void
+    {
+        unset($this->localStorage[$offset]);
+    }
+
+    public function context(): ContextInterface
+    {
+        return $this->context;
+    }
+
+    public function detach(): int
+    {
+        $flags = 0;
+        if ($this->head !== $this->head->storage->current) {
+            $flags |= ScopeInterface::INACTIVE;
+        }
+
+        if ($this === $this->head->node) {
+            assert($this->previous !== $this);
+            $this->head->node = $this->previous;
+            $this->previous = $this;
+
+            return $flags;
+        }
+
+        if ($this->previous === $this) {
+            return $flags | ScopeInterface::DETACHED;
+        }
+
+        assert($this->head->node !== null);
+        for ($n = $this->head->node, $depth = 1;
+             $n->previous !== $this;
+             $n = $n->previous, $depth++) {
+            assert($n->previous !== null);
+        }
+        $n->previous = $this->previous;
+        $this->previous = $this;
+
+        return $flags | ScopeInterface::MISMATCH | $depth;
+    }
+
+    private function __clone()
+    {
+    }
+}