55 lines
2.3 KiB
C
55 lines
2.3 KiB
C
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef INCLUDE_CPPGC_PREFINALIZER_H_
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#define INCLUDE_CPPGC_PREFINALIZER_H_
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#include "include/cppgc/internal/accessors.h"
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#include "include/cppgc/internal/compiler-specific.h"
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#include "include/cppgc/internal/prefinalizer-handler.h"
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#include "include/cppgc/liveness-broker.h"
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#include "include/cppgc/macros.h"
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namespace cppgc {
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namespace internal {
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template <typename T>
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class PrefinalizerRegistration final {
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public:
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explicit PrefinalizerRegistration(T* self) {
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static_assert(sizeof(&T::InvokePreFinalizer) > 0,
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"USING_PRE_FINALIZER(T) must be defined.");
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cppgc::internal::PreFinalizerRegistrationDispatcher::RegisterPrefinalizer(
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internal::GetHeapFromPayload(self), {self, T::InvokePreFinalizer});
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}
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void* operator new(size_t, void* location) = delete;
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void* operator new(size_t) = delete;
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};
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} // namespace internal
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#define CPPGC_USING_PRE_FINALIZER(Class, PreFinalizer) \
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public: \
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static bool InvokePreFinalizer(const LivenessBroker& liveness_broker, \
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void* object) { \
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static_assert(internal::IsGarbageCollectedTypeV<Class>, \
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"Only garbage collected objects can have prefinalizers"); \
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Class* self = static_cast<Class*>(object); \
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if (liveness_broker.IsHeapObjectAlive(self)) return false; \
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self->Class::PreFinalizer(); \
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return true; \
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} \
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\
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private: \
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CPPGC_NO_UNIQUE_ADDRESS internal::PrefinalizerRegistration<Class> \
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prefinalizer_dummy_{this}; \
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friend class internal::__thisIsHereToForceASemicolonAfterThisMacro
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} // namespace cppgc
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#endif // INCLUDE_CPPGC_PREFINALIZER_H_
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