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Diffstat (limited to 'deps/v8/include/cppgc/prefinalizer.h')
-rw-r--r-- | deps/v8/include/cppgc/prefinalizer.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/deps/v8/include/cppgc/prefinalizer.h b/deps/v8/include/cppgc/prefinalizer.h new file mode 100644 index 00000000000..2f6d68a1dac --- /dev/null +++ b/deps/v8/include/cppgc/prefinalizer.h @@ -0,0 +1,54 @@ +// Copyright 2020 the V8 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 INCLUDE_CPPGC_PREFINALIZER_H_ +#define INCLUDE_CPPGC_PREFINALIZER_H_ + +#include "cppgc/internal/accessors.h" +#include "cppgc/internal/compiler-specific.h" +#include "cppgc/internal/prefinalizer-handler.h" +#include "cppgc/liveness-broker.h" +#include "cppgc/macros.h" + +namespace cppgc { + +namespace internal { + +template <typename T> +class PrefinalizerRegistration final { + public: + explicit PrefinalizerRegistration(T* self) { + static_assert(sizeof(&T::InvokePreFinalizer) > 0, + "USING_PRE_FINALIZER(T) must be defined."); + + cppgc::internal::PreFinalizerRegistrationDispatcher::RegisterPrefinalizer( + internal::GetHeapFromPayload(self), {self, T::InvokePreFinalizer}); + } + + void* operator new(size_t, void* location) = delete; + void* operator new(size_t) = delete; +}; + +} // namespace internal + +#define CPPGC_USING_PRE_FINALIZER(Class, PreFinalizer) \ + public: \ + static bool InvokePreFinalizer(const LivenessBroker& liveness_broker, \ + void* object) { \ + static_assert(internal::IsGarbageCollectedTypeV<Class>, \ + "Only garbage collected objects can have prefinalizers"); \ + Class* self = static_cast<Class*>(object); \ + if (liveness_broker.IsHeapObjectAlive(self)) return false; \ + self->Class::PreFinalizer(); \ + return true; \ + } \ + \ + private: \ + CPPGC_NO_UNIQUE_ADDRESS internal::PrefinalizerRegistration<Class> \ + prefinalizer_dummy_{this}; \ + friend class internal::__thisIsHereToForceASemicolonAfterThisMacro + +} // namespace cppgc + +#endif // INCLUDE_CPPGC_PREFINALIZER_H_ |