1 files changed, 57 insertions, 0 deletions
diff --git a/vendor/open-telemetry/context/ContextStorage.php b/vendor/open-telemetry/context/ContextStorage.php
new file mode 100644
index 000000000..e82d3d161
--- /dev/null
+++ b/vendor/open-telemetry/context/ContextStorage.php
@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\Context;
+
+/**
+ * @internal
+ */
+final class ContextStorage implements ContextStorageInterface, ExecutionContextAwareInterface
+{
+    public ContextStorageHead $current;
+    private ContextStorageHead $main;
+    /** @var array<int|string, ContextStorageHead> */
+    private array $forks = [];
+
+    public function __construct()
+    {
+        $this->current = $this->main = new ContextStorageHead($this);
+    }
+
+    public function fork($id): void
+    {
+        $this->forks[$id] = clone $this->current;
+    }
+
+    public function switch($id): void
+    {
+        $this->current = $this->forks[$id] ?? $this->main;
+    }
+
+    public function destroy($id): void
+    {
+        unset($this->forks[$id]);
+    }
+
+    public function scope(): ?ContextStorageScopeInterface
+    {
+        return ($this->current->node->head ?? null) === $this->current
+            ? $this->current->node
+            : null;
+    }
+
+    public function current(): ContextInterface
+    {
+        return $this->current->node->context ?? Context::getRoot();
+    }
+
+    public function attach(ContextInterface $context): ContextStorageScopeInterface
+    {
+        return $this->current->node = new ContextStorageNode($context, $this->current, $this->current->node);
+    }
+
+    private function __clone()
+    {
+    }
+}