los_rwsem.h

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/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2022-2022. All rights reserved.
 * Description: Read And Write Semaphore HeadFile
 * Author: Huawei LiteOS Team
 * Create: 2022-06-16
 * 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.
 * --------------------------------------------------------------------------- */
 
#ifndef _LOS_RWSEM_H
#define _LOS_RWSEM_H
 
#include "los_err.h"
 
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
 
#define LOS_ERRNO_RWSEM_INVALID      LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x00)
 
#define LOS_ERRNO_RWSEM_PTR_NULL     LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x01)
 
#define LOS_ERRNO_RWSEM_ALL_BUSY     LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x02)
 
#define LOS_ERRNO_RWSEM_PEND_INTERR  LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x03)
 
#define LOS_ERRNO_RWSEM_PEND_IN_LOCK LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x04)
 
#define LOS_ERRNO_RWSEM_TIMEOUT      LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x05)
 
#define LOS_ERRNO_RWSEM_PENDED       LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x06)
 
#define LOS_ERRNO_RWSEM_INVALID_STATUS      LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x07)
 
#define LOS_ERRNO_RWSEM_UNAVAILABLE  LOS_ERRNO_OS_ERROR(LOS_MOD_RWSEM, 0x08)
 
extern UINT32 LOS_RwsemCreate(UINT32 *semHandle);
 
extern UINT32 LOS_RwsemDelete(UINT32 semHandle);
 
extern UINT32 LOS_RwsemPendRead(UINT32 semHandle, UINT32 timeout);
 
extern UINT32 LOS_RwsemPostRead(UINT32 semHandle);
 
extern UINT32 LOS_RwsemPendWrite(UINT32 semHandle, UINT32 timeout);
 
extern UINT32 LOS_RwsemPostWrite(UINT32 semHandle);
 
extern UINT32 LOS_RwsemDowngradeWrite(UINT32 semHandle);
 
#ifdef __cplusplus
}
#endif /* __cplusplus */
 
#endif /* _LOS_RWSEM_H */