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/* ----------------------------------------------------------------------------
* Copyright (c) Huawei Technologies Co., Ltd. 2018-2019. All rights reserved.
* Description: Lock Dependency Check.
* Author: Huawei LiteOS Team
* Create: 2018-10-18
* 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_lockdep lockdep
* @ingroup kernel
*/
#ifndef _LOS_LOCKDEP_H
#define _LOS_LOCKDEP_H
#include "los_config.h"
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
typedef struct Spinlock SPIN_LOCK_S;
#ifdef LOSCFG_KERNEL_SMP_LOCKDEP
#define MAX_LOCK_DEPTH 16U
enum LockDepErrType {
LOCKDEP_SUCEESS = 0,
LOCKDEP_ERR_DOUBLE_LOCK,
LOCKDEP_ERR_DEAD_LOCK,
LOCKDEP_ERR_UNLOCK_WITHOUT_LOCK,
/* overflow, needs expand */
LOCKDEP_ERR_OVERFLOW,
};
typedef struct {
VOID *lockPtr;
VOID *lockAddr;
UINT64 waitTime;
UINT64 holdTime;
} HeldLocks;
typedef struct {
VOID *waitLock;
INT32 lockDepth;
HeldLocks heldLocks[MAX_LOCK_DEPTH];
} LockDep;
/**
* @ingroup los_lockdep
*
* @par Description:
* This API is used to check dead lock in spinlock.
* @attention
* <ul>
* <li>The parameter passed in should be ensured to be a legal pointer.</li>
* </ul>
*
* @param lock [IN] point to a SPIN_LOCK_S.
*
* @retval None.
* @par Dependency:
* <ul><li>los_lockdep.h: the header file that contains the API declaration.</li></ul>
* @see
* @since Huawei LiteOS V200R003C00
*/
extern VOID OsLockDepCheckIn(const SPIN_LOCK_S *lock);
/**
* @ingroup los_lockdep
*
* @par Description:
* This API is used to trace when a spinlock locked.
* @attention
* <ul>
* <li>The parameter passed in should be ensured to be a legal pointer.</li>
* </ul>
*
* @param lock [IN] point to a SPIN_LOCK_S.
*
* @retval None.
* @par Dependency:
* <ul><li>los_lockdep.h: the header file that contains the API declaration.</li></ul>
* @see
* @since Huawei LiteOS V200R003C00
*/
extern VOID OsLockDepRecord(SPIN_LOCK_S *lock);
/**
* @ingroup los_lockdep
*
* @par Description:
* This API is used to trace when a spinlock unlocked.
* @attention
* <ul>
* <li>The parameter passed in should be ensured to be a legal pointer.</li>
* </ul>
*
* @param lock [IN] point to a SPIN_LOCK_S.
*
* @retval None.
* @par Dependency:
* <ul><li>los_lockdep.h: the header file that contains the API declaration.</li></ul>
* @see
* @since Huawei LiteOS V200R003C00
*/
extern VOID OsLockDepCheckOut(SPIN_LOCK_S *lock);
/**
* @ingroup los_lockdep
*
* @par Description:
* This API is used to clear lockdep record of current task.
* @attention
* <ul>
* <li>None.</li>
* </ul>
*
* @param None
* @retval None.
* @par Dependency:
* <ul><li>los_lockdep.h: the header file that contains the API declaration.</li></ul>
* @see
* @since Huawei LiteOS V200R003C00
*/
extern VOID OsLockdepClearSpinlocks(VOID);
#endif /* LOSCFG_KERNEL_SMP_LOCKDEP */
#ifdef __cplusplus
#if __cplusplus
}
#endif
#endif /* __cplusplus */
#endif /* _LOS_LOCKDEP_H */
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