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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/jpeg-xl/lib/jxl/base/scope_guard.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/base/scope_guard.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/base/scope_guard.h b/third_party/jpeg-xl/lib/jxl/base/scope_guard.h new file mode 100644 index 0000000000..a18a44cb79 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/base/scope_guard.h @@ -0,0 +1,48 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#ifndef LIB_JXL_BASE_SCOPE_GUARD_H_ +#define LIB_JXL_BASE_SCOPE_GUARD_H_ + +#include <utility> + +namespace jxl { + +template <typename Callback> +class ScopeGuard { + public: + // Discourage unnecessary moves / copies. + ScopeGuard(const ScopeGuard &) = delete; + ScopeGuard &operator=(const ScopeGuard &) = delete; + ScopeGuard &operator=(ScopeGuard &&) = delete; + + // Pre-C++17 does not guarantee RVO -> require move constructor. + ScopeGuard(ScopeGuard &&other) : callback_(std::move(other.callback_)) { + other.armed_ = false; + } + + template <typename CallbackParam> + explicit ScopeGuard(CallbackParam &&callback) + : callback_(std::forward<CallbackParam>(callback)), armed_(true) {} + + ~ScopeGuard() { + if (armed_) callback_(); + } + + void Disarm() { armed_ = false; } + + private: + Callback callback_; + bool armed_; +}; + +template <typename Callback> +ScopeGuard<Callback> MakeScopeGuard(Callback &&callback) { + return ScopeGuard<Callback>{std::forward<Callback>(callback)}; +} + +} // namespace jxl + +#endif // LIB_JXL_BASE_SCOPE_GUARD_H_ |