diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/zstd/contrib/pzstd/utils/ScopeGuard.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/zstd/contrib/pzstd/utils/ScopeGuard.h | 50 |
1 files changed, 50 insertions, 0 deletions
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)); +} +} |