1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2017 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 * $FreeBSD$ 30 */ 31 #ifndef _LINUXKPI_LINUX_SPINLOCK_H_ 32 #define _LINUXKPI_LINUX_SPINLOCK_H_ 33 34 #include "los_typedef.h" 35 #include "los_spinlock.h" 36 37 #ifdef __cplusplus 38 #if __cplusplus 39 extern "C" { 40 #endif /* __cplusplus */ 41 #endif /* __cplusplus */ 42 43 typedef struct Spinlock spinlock_t; 44 45 #define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_INITIALIZER(x) 46 47 #define SPIN_MACRO_START do { 48 #define SPIN_MACRO_END } while (0) 49 50 #define SPIN_EMPTY_STATEMENT SPIN_MACRO_START SPIN_MACRO_END 51 52 #define SPIN_UNUSED_PARAM(_type_, _name_) SPIN_MACRO_START \ 53 _type_ __tmp1 = (_name_); \ 54 _type_ __tmp2 = __tmp1; \ 55 __tmp1 = __tmp2; \ 56 SPIN_MACRO_END 57 58 #define spin_lock_bh(lock) \ 59 SPIN_MACRO_START; \ 60 SPIN_UNUSED_PARAM(spinlock_t *, lock); \ 61 SPIN_MACRO_END 62 63 #define spin_unlock_bh(lock) \ 64 SPIN_MACRO_START; \ 65 SPIN_UNUSED_PARAM(spinlock_t *, lock); \ 66 SPIN_MACRO_END 67 68 #ifdef LOSCFG_KERNEL_SMP 69 #define spin_lock_init(lock) do {LOS_SpinInit(lock);} while (0) 70 #define spin_lock(lock) do {LOS_SpinLock(lock);} while (0) 71 #define spin_unlock(lock) do {LOS_SpinUnlock(lock);} while (0) 72 73 #define spin_lock_irqsave(lock, flags) do {LOS_SpinLockSave(lock, (UINT32 *)&flags);} while (0) 74 #define spin_unlock_irqrestore(lock, flags) do {LOS_SpinUnlockRestore(lock, (UINT32)flags);} while (0) 75 #else 76 77 #define spin_lock_init(lock) \ 78 SPIN_MACRO_START; \ 79 SPIN_UNUSED_PARAM(spinlock_t *, lock); \ 80 SPIN_MACRO_END 81 82 #define spin_lock(lock) do {(void)(lock);LOS_TaskLock();} while (0) 83 #define spin_unlock(lock) do {(void)(lock);LOS_TaskUnlock();} while (0) 84 85 #define spin_lock_irqsave(lock, flags) do {flags = LOS_IntLock();spin_lock(lock);} while (0) 86 #define spin_unlock_irqrestore(lock, flags) do {spin_unlock(lock);LOS_IntRestore(flags);} while (0) 87 #endif 88 89 #ifdef __cplusplus 90 #if __cplusplus 91 } 92 #endif /* __cplusplus */ 93 #endif /* __cplusplus */ 94 95 #endif /* _LINUXKPI_LINUX_SPINLOCK_H_ */ 96