From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/zstd/contrib/pzstd/utils/ScopeGuard.h | 50 +++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 src/zstd/contrib/pzstd/utils/ScopeGuard.h

(limited to 'src/zstd/contrib/pzstd/utils/ScopeGuard.h')

diff --git a/src/zstd/contrib/pzstd/utils/ScopeGuard.h b/src/zstd/contrib/pzstd/utils/ScopeGuard.h
new file mode 100644
index 000000000..31768f43d
--- /dev/null
+++ b/src/zstd/contrib/pzstd/utils/ScopeGuard.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ */
+#pragma once
+
+#include <utility>
+
+namespace pzstd {
+
+/**
+ * Dismissable scope guard.
+ * `Function` must be callable and take no parameters.
+ * Unless `dissmiss()` is called, the callable is executed upon destruction of
+ * `ScopeGuard`.
+ *
+ * Example:
+ *
+ *   auto guard = makeScopeGuard([&] { cleanup(); });
+ */
+template <typename Function>
+class ScopeGuard {
+  Function function;
+  bool dismissed;
+
+ public:
+  explicit ScopeGuard(Function&& function)
+      : function(std::move(function)), dismissed(false) {}
+
+  void dismiss() {
+    dismissed = true;
+  }
+
+  ~ScopeGuard() noexcept {
+    if (!dismissed) {
+      function();
+    }
+  }
+};
+
+/// Creates a scope guard from `function`.
+template <typename Function>
+ScopeGuard<Function> makeScopeGuard(Function&& function) {
+  return ScopeGuard<Function>(std::forward<Function>(function));
+}
+}
-- 
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