135 lines
4.1 KiB
C
Executable File
135 lines
4.1 KiB
C
Executable File
/*
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* Copyright (c) 2013-2019, Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020, Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LOS_SEM_PRI_H
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#define _LOS_SEM_PRI_H
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#include "los_sem.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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enum LosSemMaxCount {
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OS_SEM_COUNTING_MAX_COUNT = 0xFFFF, /**< Max count of counting semaphores */
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OS_SEM_BINARY_MAX_COUNT = 1 /**< Max count of binary semaphores */
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};
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/**
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* @ingroup los_sem
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* Semaphore control structure.
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*/
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typedef struct {
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UINT16 semStat; /**< Semaphore state */
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UINT16 semCount; /**< Number of available semaphores */
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UINT16 maxSemCount; /**< Max number of available semaphores */
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UINT16 semID; /**< Semaphore control structure ID */
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LOS_DL_LIST semList; /**< Queue of tasks that are waiting on a semaphore */
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} LosSemCB;
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/**
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* @ingroup los_sem
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* The semaphore is not in use.
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*
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*/
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#define OS_SEM_UNUSED 0
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/**
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* @ingroup los_sem
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* The semaphore is used.
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*
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*/
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#define OS_SEM_USED 1
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/**
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* @ingroup los_sem
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* Obtain the head node in a semaphore doubly linked list.
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*
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*/
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#define GET_SEM_LIST(ptr) LOS_DL_LIST_ENTRY(ptr, LosSemCB, semList)
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extern LosSemCB *g_allSem;
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/**
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* @ingroup los_sem
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* Obtain a semaphore ID.
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*
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*/
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#define GET_SEM(semid) (((LosSemCB *)g_allSem) + (semid))
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/**
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* @ingroup los_sem
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* @brief Initialize the Semaphore doubly linked list.
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*
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* @par Description:
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* This API is used to initialize the Semaphore doubly linked list.
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* @attention
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* <ul>
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* <li>None.</li>
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* </ul>
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*
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* @param None.
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*
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* @retval UINT32 Initialization result.
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* @par Dependency:
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* <ul><li>los_sem_pri.h: the header file that contains the API declaration.</li></ul>
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* @see None.
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*/
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extern UINT32 OsSemInit(VOID);
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/**
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* @ingroup los_sem
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* @brief Create Semaphore.
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*
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* @par Description:
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* This API is used to create Semaphore.
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* @attention
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* <ul>
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* <li>None.</li>
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* </ul>
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*
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* @param count [IN]Type #UINT16 Semaphore count.
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* @param maxCount [IN]Type #UINT16 Max semaphore count.
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* @param semHandle [OUT]Type #UINT32 * Index of semaphore.
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*
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* @retval UINT32 Create result.
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* @par Dependency:
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* <ul><li>los_sem_pri.h: the header file that contains the API declaration.</li></ul>
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* @see None.
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*/
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UINT32 OsSemCreate(UINT16 count, UINT16 maxCount, UINT32 *semHandle);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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#endif /* _LOS_SEM_PRI_H */
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