mirror of
https://gitee.com/openharmony/arkcompiler_ets_runtime
synced 2024-10-07 08:03:29 +00:00
5863b6c6da
issue:https://gitee.com/openharmony/arkui_ace_engine/pulls/2628 Signed-off-by: yingguofeng@huawei.com <yingguofeng@huawei.com> Change-Id: I28bcfa69f47d9b239d1cd37f8bbd34c82a0c8da9
78 lines
2.6 KiB
C++
78 lines
2.6 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 ECMASCRIPT_HANDLE_SCOPE_H
|
|
#define ECMASCRIPT_HANDLE_SCOPE_H
|
|
|
|
#include "ecmascript/js_tagged_value.h"
|
|
#include "ecmascript/js_thread.h"
|
|
namespace panda::ecmascript {
|
|
/*
|
|
* Handles are only valid within a HandleScope. When a handle is created for an object a cell is allocated in the
|
|
* current HandleScope.
|
|
*/
|
|
class EcmaHandleScope {
|
|
public:
|
|
inline explicit EcmaHandleScope(JSThread *thread) :
|
|
thread_(thread), prevNext_(thread->handleScopeStorageNext_), prevEnd_(thread->handleScopeStorageEnd_),
|
|
prevHandleStorageIndex_(thread->currentHandleStorageIndex_)
|
|
{
|
|
thread->HandleScopeCountAdd();
|
|
}
|
|
|
|
inline ~EcmaHandleScope()
|
|
{
|
|
thread_->HandleScopeCountDec();
|
|
thread_->handleScopeStorageNext_ = prevNext_;
|
|
if (thread_->handleScopeStorageEnd_ != prevEnd_) {
|
|
thread_->handleScopeStorageEnd_ = prevEnd_;
|
|
thread_->ShrinkHandleStorage(prevHandleStorageIndex_);
|
|
}
|
|
}
|
|
|
|
static inline uintptr_t PUBLIC_API NewHandle(JSThread *thread, JSTaggedType value)
|
|
{
|
|
// Each Handle must be managed by HandleScope, otherwise it may cause Handle leakage.
|
|
ASSERT(thread->handleScopeCount_ > 0);
|
|
#if ECMASCRIPT_ENABLE_NEW_HANDLE_CHECK
|
|
thread->CheckJSTaggedType(value);
|
|
#endif
|
|
auto result = thread->handleScopeStorageNext_;
|
|
if (result == thread->handleScopeStorageEnd_) {
|
|
result = reinterpret_cast<JSTaggedType *>(thread->ExpandHandleStorage());
|
|
}
|
|
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
|
|
thread->handleScopeStorageNext_ = result + 1;
|
|
*result = value;
|
|
return reinterpret_cast<uintptr_t>(result);
|
|
}
|
|
|
|
JSThread *GetThread() const
|
|
{
|
|
return thread_;
|
|
}
|
|
|
|
private:
|
|
JSThread *thread_;
|
|
JSTaggedType *prevNext_;
|
|
JSTaggedType *prevEnd_;
|
|
int prevHandleStorageIndex_{-1};
|
|
|
|
NO_COPY_SEMANTIC(EcmaHandleScope);
|
|
NO_MOVE_SEMANTIC(EcmaHandleScope);
|
|
};
|
|
} // namespace panda::ecmascript
|
|
#endif // ECMASCRIPT_HANDLE_SCOPE_H
|