/*

 * 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_VM_THREAD_CONTROL_H

#define ECMASCRIPT_VM_THREAD_CONTROL_H



#include "ecmascript/js_thread.h"

#include "ecmascript/platform/mutex.h"

#include "libpandabase/utils/bit_field.h"



namespace panda::ecmascript {

class VmThreadControl {

public:

    static constexpr char VM_NEED_SUSPENSION = 1;



    VmThreadControl(JSThread *thread)

    {

        thread_ = thread;

    }



    void SetVMNeedSuspension(bool flag);



    void SetTerminationRequest(bool flag);



    bool VMNeedSuspension() const;



    void SuspendVM();



    void ResumeVM();



    bool NotifyVMThreadSuspension();



    void RequestTerminateExecution();



    void SetVMSuspended(bool flag);



    bool IsSuspended() const;



private:

    JSThread *thread_;

    Mutex vmThreadSuspensionMutex_;

    ConditionVariable vmThreadNeedSuspensionCV_;

    ConditionVariable vmThreadHasSuspendedCV_;

};

} // namespace panda::ecmascript

#endif  // ECMASCRIPT_VM_THREAD_CONTROL_H