/* * Copyright (c) 2017, Stefan Lankes, RWTH Aachen University * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** * @author Stefan Lankes * @file arch/arm64/include/asm/atomic.h * @brief Functions for atomic operations * * This file prepare atomic operations on int32 & int64_t variables * which will be used in locking-mechanisms. */ #ifndef __ARCH_ATOMIC_H__ #define __ARCH_ATOMIC_H__ #include #ifdef __cplusplus extern "C" { #endif static inline void atomic_barrier(void) { asm volatile ("" : : : "memory"); } /** @brief Makro for initialization of atomic vars * * Whenever you use an atomic variable, init it with * this macro first.\n * Example: atomic_int32_t myAtomicVar = ATOMIC_INIT(123); * * @param i The number value you want to init it with. */ #define ATOMIC_INIT(i) { (i) } #include #include #ifdef __cplusplus } #endif #endif