mirror of
https://github.com/openharmony/ark_runtime_core.git
synced 2026-07-18 18:24:30 -04:00
Ilya Trubachev
93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021-2022 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 PANDA_RUNTIME_HANDLE_SCOPE_H_
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#define PANDA_RUNTIME_HANDLE_SCOPE_H_
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#include "runtime/handle_base.h"
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#include "runtime/include/coretypes/tagged_value.h"
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namespace panda {
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/*
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* Handles are only valid within a HandleScope. When a handle is created for an object a cell is allocated in the
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* current HandleScope.
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*/
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template <typename T>
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class HandleScope {
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public:
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inline explicit HandleScope(ManagedThread *thread);
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virtual inline ~HandleScope();
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inline uint32_t GetBeginIndex() const
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{
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return beginIndex_;
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}
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inline uint32_t GetHandleCount() const
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{
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return handleCount_;
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}
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uintptr_t NewHandle(T value);
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protected:
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inline HandleScope(ManagedThread *thread, T value);
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inline ManagedThread *GetThread() const;
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uint32_t beginIndex_ {0}; // NOLINT(misc-non-private-member-variables-in-classes)
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private:
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uint32_t handleCount_ {0};
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ManagedThread *thread_ {nullptr};
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NO_COPY_SEMANTIC(HandleScope);
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NO_MOVE_SEMANTIC(HandleScope);
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};
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/*
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* EscapeHandleScope: Support the user to return a handle to prev handlescope.
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*/
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template <typename T>
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class EscapeHandleScope final : public HandleScope<T> {
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public:
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inline explicit EscapeHandleScope(ManagedThread *thread);
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inline ~EscapeHandleScope() override
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{
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ASSERT(alreadyEscape_);
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}
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NO_COPY_SEMANTIC(EscapeHandleScope);
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NO_MOVE_SEMANTIC(EscapeHandleScope);
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inline HandleBase Escape(HandleBase handle)
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{
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ASSERT(!alreadyEscape_);
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alreadyEscape_ = true;
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*(reinterpret_cast<T *>(escapeHandle_.GetAddress())) = *(reinterpret_cast<T *>(handle.GetAddress()));
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return escapeHandle_;
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}
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private:
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bool alreadyEscape_ = false;
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HandleBase escapeHandle_;
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};
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} // namespace panda
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#endif // PANDA_RUNTIME_HANDLE_SCOPE_H_
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