1 /* ---------------------------------------------------------------------------- 2 * Copyright (c) Huawei Technologies Co., Ltd. 2022-2022. All rights reserved. 3 * Description: LiteOS compat headfile for nuttx semaphore 4 * Author: Huawei LiteOS Team 5 * Create: 2022-07-15 6 * Redistribution and use in source and binary forms, with or without modification, 7 * are permitted provided that the following conditions are met: 8 * 1. Redistributions of source code must retain the above copyright notice, this list of 9 * conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list 11 * of conditions and the following disclaimer in the documentation and/or other materials 12 * provided with the distribution. 13 * 3. Neither the name of the copyright holder nor the names of its contributors may be used 14 * to endorse or promote products derived from this software without specific prior written 15 * permission. 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 18 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * --------------------------------------------------------------------------- */ 28 29 #ifndef __INCLUDE_NUTTX_SEMAPHORE_H 30 #define __INCLUDE_NUTTX_SEMAPHORE_H 31 32 /**************************************************************************** 33 * Included Files 34 ****************************************************************************/ 35 36 /* Avoid including this header file. */ 37 #include <semaphore.h> 38 39 #undef EXTERN 40 #if defined(__cplusplus) 41 #define EXTERN extern "C" 42 extern "C" 43 { 44 #else 45 #define EXTERN extern 46 #endif 47 48 /**************************************************************************** 49 * Public Function Prototypes 50 ****************************************************************************/ 51 52 /* Compatible with the NuttX internal OS interface: 53 * It follows the NuttX internal error return policy: Zero (OK) is 54 * returned on success. A negated errno value is returned on failure. 55 */ 56 int nxsem_init(sem_t *sem, int pshared, unsigned int value); 57 int nxsem_post(sem_t *sem); 58 int nxsem_wait(sem_t *sem); 59 int nxsem_destroy(sem_t *sem); 60 61 #define nxsem_wait_uninterruptible nxsem_wait 62 63 /* LiteOS does not support static semaphore. 64 * Therefore, this parameter needs to be set to null. 65 */ 66 67 #define SEM_INITIALIZER(sem) {} 68 69 #undef EXTERN 70 #if defined(__cplusplus) 71 } 72 #endif 73 74 #endif /* __INCLUDE_NUTTX_SEMAPHORE_H */ 75