/* SPDX-License-Identifier: BSD-3-Clause

*

* Copyright(c) 2019 Intel Corporation. All rights reserved.

*

* Author: Tomasz Lauda <tomasz.lauda@linux.intel.com>

* Janusz Jankowski <janusz.jankowski@linux.intel.com>

*/

#ifndef __SOF_COMMON_H__

#define __SOF_COMMON_H__

#include <sof/trace/preproc.h>

/* use same syntax as Linux for simplicity */

#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))

#define container_of(ptr, type, member) \

({const typeof(((type *)0)->member)*__memberptr = (ptr); \

(type *)((char *)__memberptr - offsetof(type, member)); })

/* Align the number to the nearest alignment value */

#define ALIGN_UP(size, alignment) \

(((size) % (alignment) == 0) ? (size) : \

((size) - ((size) % (alignment)) + (alignment)))

#define ALIGN_DOWN(size, alignment) \

((size) - ((size) % (alignment)))

#define ALIGN ALIGN_UP

#define __packed __attribute__((packed))

#define __aligned(x) __attribute__((__aligned__(x)))

/* count number of var args */

#define PP_NARG(...) (sizeof((unsigned int[]){0, ##__VA_ARGS__}) \

/ sizeof(unsigned int) - 1)

/* compile-time assertion */

#define STATIC_ASSERT(COND, MESSAGE) \

__attribute__((unused)) \

typedef char META_CONCAT(assertion_failed_, MESSAGE)[(COND) ? 1 : -1]

/* Allows checking preprocessor symbols in compile-time.

* Returns true for config with value 1, false for undefined or any other value.

*

* Expression like (CONFIG_MY ? a : b) rises compilation error when CONFIG_MY

* is undefined, (IS_ENABLED(CONFIG_MY) ? a : b) can be used instead of it.

*

* It is intended to be used with Kconfig's bool configs - it should rise

* error for other types, except positive integers, but it shouldn't be

* used with them.

*/

#define IS_ENABLED(config) IS_ENABLED_STEP_1(config)

#define IS_ENABLED_DUMMY_1 0,

#define IS_ENABLED_STEP_1(config) IS_ENABLED_STEP_2(IS_ENABLED_DUMMY_ ## config)

#define IS_ENABLED_STEP_2(values) IS_ENABLED_STEP_3(values 1, 0)

#define IS_ENABLED_STEP_3(ignore, value, ...) (!!(value))

#endif /* __SOF_COMMON_H__ */