mirror of
https://github.com/openharmony/window_window_manager.git
synced 2026-08-24 15:55:05 -04:00
whqwe
129 lines
4.2 KiB
C++
129 lines
4.2 KiB
C++
/*
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* Copyright (c) 2024 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef THREAD_SAFETY_ANNOTATIONS_H
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#define THREAD_SAFETY_ANNOTATIONS_H
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// https://clang.llvm.org/docs/ThreadSafetyAnalysis.html
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// Enable thread safety attributes only with clang.
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// The attributes can be safely erased when compiling with other compilers.
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#if defined(__clang__) && (!defined(SWIG))
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#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
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#else
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#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
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#endif
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#define CAPABILITY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
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#define SCOPED_CAPABILITY \
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THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
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#define GUARDED_BY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
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#define PT_GUARDED_BY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
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#define ACQUIRED_BEFORE(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
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#define ACQUIRED_AFTER(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
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#define REQUIRES(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
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#define REQUIRES_SHARED(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
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#define ACQUIRE(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
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#define ACQUIRE_SHARED(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
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#define RELEASE(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
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#define RELEASE_SHARED(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
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#define RELEASE_GENERIC(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(release_generic_capability(__VA_ARGS__))
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#define TRY_ACQUIRE(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
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#define TRY_ACQUIRE_SHARED(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
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#define EXCLUDES(...) \
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THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
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#define ASSERT_CAPABILITY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
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#define ASSERT_SHARED_CAPABILITY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
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#define RETURN_CAPABILITY(x) \
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THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
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#define NO_THREAD_SAFETY_ANALYSIS \
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THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
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namespace OHOS::Rosen {
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class CAPABILITY("mutex") SingleThreadGuard {};
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// ONLY used for those accessed ONLY on scene session manager thread.
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// If other looper threads(NOT ffrt or ipc), define a new one.
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constexpr SingleThreadGuard SCENE_GUARD;
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template <typename Guard>
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struct SCOPED_CAPABILITY ScopedGuard final {
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explicit ScopedGuard(const Guard& guard) ACQUIRE(guard) {}
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~ScopedGuard() RELEASE() {}
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ScopedGuard(const ScopedGuard&) = delete;
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ScopedGuard& operator=(const ScopedGuard&) = delete;
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};
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} // namespace OHOS::Rosen
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// Use this for lambdas. THREAD_SAFETY_GUARD is preferred.
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#define LOCK_GUARD(guard) \
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ACQUIRE(guard) RELEASE(guard)
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// Use this for expressions. THREAD_SAFETY_GUARD is preferred.
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#define LOCK_GUARD_TWO(guard, expr) \
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(OHOS::Rosen::ScopedGuard(guard), expr)
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// Use this when LOCK_GUARD_TWO/THREAD_SAFETY_GUARD works failed.
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#define LOCK_GUARD_EXPR(guard, expr) \
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[&] { \
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OHOS::Rosen::ScopedGuard lock(guard); \
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return (expr); \
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}()
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// Do not use this.
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#define CREATE_THREAD_SAFETY_GUARD(opt1, opt2, guard, ...) guard
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// Use THREAD_SAFETY_GUARD for common cases, including LOCK_GUARD and LOCK_GUARD_TWO.
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#define THREAD_SAFETY_GUARD(...) \
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CREATE_THREAD_SAFETY_GUARD(__VA_ARGS__, LOCK_GUARD_TWO, LOCK_GUARD,)(__VA_ARGS__)
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#endif // THREAD_SAFETY_ANNOTATIONS_H
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