distributedhardware_distributed_input/common/utils/include/single_instance.h

/*
 * Copyright (c) 2021-2022 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 OHOS_DISTRIBUTED_HARDWARE_SINGLE_INSTANCE_H
#define OHOS_DISTRIBUTED_HARDWARE_SINGLE_INSTANCE_H

namespace OHOS {
namespace DistributedHardware {
#define REMOVE_NO_USE_CONSTRUCTOR(className)            \
private:                                                \
    className(const className&) = delete;               \
    className& operator= (const className&) = delete;   \
    className(className&&) = delete;                    \
    className& operator= (className&&) = delete;        \

#define DECLARE_SINGLE_INSTANCE_BASE(className)         \
public:                                                 \
    static className & GetInstance();                   \
private:                                                \
    className(const className&) = delete;               \
    className& operator= (const className&) = delete;   \
    className(className&&) = delete;                    \
    className& operator= (className&&) = delete;        \

#define DECLARE_SINGLE_INSTANCE(className)              \
    DECLARE_SINGLE_INSTANCE_BASE(className)             \
private:                                                \
    className() = default;                              \
    virtual ~className() = default;                     \

#define IMPLEMENT_SINGLE_INSTANCE(className)            \
className & className::GetInstance()                    \
{                                                       \
    static className instance;                          \
    return instance;                                    \
}
} // namespace DistributedHardware
} // namespace OHOS
#endif // OHOS_DISTRIBUTED_HARDWARE_SINGLE_INSTANCE_H