kernel_liteos_a1/kernel/include/los_tickless.h

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2020-09-08 10:21:39 +08:00
/*
* Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
* Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @defgroup los_tickless Tickless
* @ingroup kernel
*/
#ifndef _LOS_TICKLESS_H
#define _LOS_TICKLESS_H
#include "los_typedef.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
/**
* @ingroup los_tickless
* @brief enable the tickless mode.
*
* @par Description:
* This API is used to enable the tickless mode. System can change from periodic clock mode to dynamic clock mode.
*
* @attention
* <ul>
* </ul>
*
* @param None.
*
* @retval None.
* @par Dependency:
* <ul><li>los_tickless.h: the header file that contains the API declaration.</li></ul>
* @see LOS_TicklessDisable
*/
extern VOID LOS_TicklessEnable(VOID);
/**
* @ingroup los_tickless
* @brief disable the tickless mode.
*
* @par Description:
* This API is used to diable the tickless mode. System will not change from periodic clock mode to dynamic clock mode.
*
* @attention
* <ul>
* </ul>
*
* @param None.
*
* @retval None.
* @par Dependency:
* <ul><li>los_tickless.h: the header file that contains the API declaration.</li></ul>
* @see LOS_TicklessEnable
*/
extern VOID LOS_TicklessDisable(VOID);
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
#endif