mirror of
https://github.com/openharmony/ark_runtime_core.git
synced 2026-07-19 13:17:49 -04:00
wanyanglan
14c9021696
Signed-off-by: wanyanglan <wanyanglan1@huawei.com> Change-Id: I2564094cef9c6c41263e37faf9ffbbec14223dc7
93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2021 Huawei Device Co., Ltd.
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef PANDA_RUNTIME_HANDLE_SCOPE_H_
|
|
#define PANDA_RUNTIME_HANDLE_SCOPE_H_
|
|
|
|
#include "runtime/handle_base.h"
|
|
#include "runtime/include/coretypes/tagged_value.h"
|
|
|
|
namespace panda {
|
|
/*
|
|
* Handles are only valid within a HandleScope. When a handle is created for an object a cell is allocated in the
|
|
* current HandleScope.
|
|
*/
|
|
template <typename T>
|
|
class HandleScope {
|
|
public:
|
|
inline explicit HandleScope(ManagedThread *thread);
|
|
|
|
virtual inline ~HandleScope();
|
|
|
|
inline uint32_t GetBeginIndex() const
|
|
{
|
|
return beginIndex_;
|
|
}
|
|
|
|
inline uint32_t GetHandleCount() const
|
|
{
|
|
return handleCount_;
|
|
}
|
|
|
|
uintptr_t NewHandle(T value);
|
|
|
|
protected:
|
|
inline HandleScope(ManagedThread *thread, T value);
|
|
|
|
inline ManagedThread *GetThread() const;
|
|
|
|
uint32_t beginIndex_ {0}; // NOLINT(misc-non-private-member-variables-in-classes)
|
|
|
|
private:
|
|
uint32_t handleCount_ {0};
|
|
ManagedThread *thread_ {nullptr};
|
|
|
|
NO_COPY_SEMANTIC(HandleScope);
|
|
NO_MOVE_SEMANTIC(HandleScope);
|
|
};
|
|
|
|
/*
|
|
* EscapeHandleScope: Support the user to return a handle to prev handlescope.
|
|
*/
|
|
template <typename T>
|
|
class EscapeHandleScope final : public HandleScope<T> {
|
|
public:
|
|
inline explicit EscapeHandleScope(ManagedThread *thread);
|
|
|
|
inline ~EscapeHandleScope() override
|
|
{
|
|
ASSERT(alreadyEscape_);
|
|
}
|
|
|
|
NO_COPY_SEMANTIC(EscapeHandleScope);
|
|
NO_MOVE_SEMANTIC(EscapeHandleScope);
|
|
|
|
inline HandleBase Escape(HandleBase handle)
|
|
{
|
|
ASSERT(!alreadyEscape_);
|
|
alreadyEscape_ = true;
|
|
*(reinterpret_cast<T *>(escapeHandle_.GetAddress())) = *(reinterpret_cast<T *>(handle.GetAddress()));
|
|
return escapeHandle_;
|
|
}
|
|
|
|
private:
|
|
bool alreadyEscape_ = false;
|
|
HandleBase escapeHandle_;
|
|
};
|
|
|
|
} // namespace panda
|
|
|
|
#endif // PANDA_RUNTIME_HANDLE_SCOPE_H_
|