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