kernel_liteos_a/kernel/include/los_toolchain.h

/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 COPYRIGHT HOLDER 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.
 */

/**
 * @defgroup los_toolchain
 * @ingroup kernel
 */

#ifndef _LOS_TOOLCHAIN_H
#define _LOS_TOOLCHAIN_H

#if defined ( __ICCARM__ )
#include "iccarm_builtin.h"
#endif

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

#ifndef UNUSED
#define UNUSED(var)    \
        do {           \
            (void)var; \
        } while (0)
#endif

/* for ARM Compiler */
#if defined ( __CC_ARM )
#ifndef ASM
#define ASM                                         __asm
#endif

#ifndef INLINE
#define INLINE                                      __inline
#endif

#ifndef STATIC_INLINE
#define STATIC_INLINE                               static __inline
#endif

#ifndef USED
#define USED                                        __attribute__((used))
#endif

#ifndef WEAK
#define WEAK                                        __attribute__((weak))
#endif

#ifndef CLZ
#define CLZ(value)                                  (__clz(value))
#endif

#ifndef NORETURN
#define NORETURN                                    __declspec(noreturn)
#endif

#ifndef DEPRECATED
#define DEPRECATED                                  __attribute__((deprecated))
#endif

/* for IAR Compiler */
#elif defined ( __ICCARM__ )

#ifndef ASM
#define ASM                                         __asm
#endif

#ifndef INLINE
#define INLINE                                      inline
#endif

#ifndef STATIC_INLINE
#define STATIC_INLINE                               static inline
#endif

#ifndef USED
#define USED                                        __root
#endif

#ifndef WEAK
#define WEAK                                        __weak
#endif

#ifndef CLZ
#define CLZ(value)                                  (__iar_builtin_CLZ(value))
#endif

#ifndef CTZ
#define CTZ(value)                                  (__UNDEFINED(value))
#endif

#ifndef NORETURN
#define NORETURN                                    __attribute__ ((__noreturn__))
#endif

#ifndef DEPRECATED
#define DEPRECATED                                  __attribute__((deprecated))
#endif

/* for GNU Compiler */
#elif defined ( __GNUC__ )

#ifndef ASM
#define ASM                                         __asm
#endif

#ifndef INLINE
#define INLINE                                      __inline
#endif

#ifndef STATIC_INLINE
#define STATIC_INLINE                               static inline
#endif

#ifndef USED
#define USED                                        __attribute__((used))
#endif

#ifndef WEAK
#define WEAK                                        __attribute__((weak))
#endif

#ifndef CLZ
#define CLZ(value)                                  (__builtin_clz(value))
#endif

#ifndef CTZ
#define CTZ(value)                                  (__builtin_ctz(value))
#endif

#ifndef NORETURN
#define NORETURN                                    __attribute__ ((__noreturn__))
#endif

#ifndef DEPRECATED
#define DEPRECATED                                  __attribute__((deprecated))
#endif

#else
#error Unknown compiler.
#endif

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */

#endif /* _LOS_TOOLCHAIN_H */