1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD: releng/12.2/sys/compat/linuxkpi/common/include/linux/semaphore.h 314040 2017-02-21 12:43:02Z hselasky $ 30 */ 31 #ifndef _LINUX_SEMAPHORE_H_ 32 #define _LINUX_SEMAPHORE_H_ 33 34 #include "los_sem_pri.h" 35 36 #ifdef __cplusplus 37 #if __cplusplus 38 extern "C" { 39 #endif /* __cplusplus */ 40 #endif /* __cplusplus */ 41 42 #define UNINIT_VALUE 0xFFFFFFFF 43 #define ERESTARTSYS 512 /* The return vlaue of down_interruptiable in Linux */ 44 45 struct semaphore { 46 LosSemCB *sem; 47 int count; 48 }; 49 50 typedef struct semaphore losMutexDef_t; 51 #define DECLARE_MUTEX(x) struct semaphore x = { (LosSemCB *)UNINIT_VALUE, 1 } 52 #define DECLARE_MUTEX_LOCKED(x) struct semaphore x = { (LosSemCB *)UNINIT_VALUE, 0 } 53 #define DEFINE_SEMAPHORE(x) DECLARE_MUTEX(x) 54 55 extern int _sema_lock(losMutexDef_t *sem); 56 extern int _sema_unlock(losMutexDef_t *sem); 57 extern int _sema_init(losMutexDef_t *sem, unsigned int value); 58 extern int _sema_destory(losMutexDef_t *sem); 59 extern int _sema_trylock(losMutexDef_t *sem); 60 61 #define init_MUTEX(sem) _sema_init((losMutexDef_t*)(sem), 1) 62 #define destory_MUTEX(sem) _sema_destory((losMutexDef_t*)(sem)) 63 #define init_MUTEX_LOCKED(sem) (VOID)_sema_init((losMutexDef_t*)(sem), 0); 64 #define down(sem) _sema_lock((losMutexDef_t*)(sem)) 65 #define down_interruptible(sem) _sema_lock((losMutexDef_t*)(sem)) 66 #define down_trylock(sem) _sema_trylock((losMutexDef_t*)(sem)) 67 #define up(sem) _sema_unlock((losMutexDef_t*)(sem)) 68 69 #define sema_init(sem, n) do { \ 70 if ((n) == 1) { \ 71 init_MUTEX(sem); \ 72 } else { \ 73 init_MUTEX_LOCKED(sem); \ 74 } \ 75 } while (0) 76 77 #define sema_destory(sem) do { \ 78 destory_MUTEX(sem); \ 79 } while (0) 80 81 #ifdef __cplusplus 82 #if __cplusplus 83 } 84 #endif /* __cplusplus */ 85 #endif /* __cplusplus */ 86 87 #endif /* _LINUX_SEMAPHORE_H_ */ 88