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/*
* Copyright © 2017-2022 The Crust Firmware Authors.
* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
*/
#ifndef LIB_COMPILER_H
#define LIB_COMPILER_H
/* Attributes */
#define ATTRIBUTE(...) __attribute__((__VA_ARGS__))
#define UNUSED __attribute__((unused))
#define WEAK __attribute__((weak))
/* Barriers */
#define barrier() asm volatile ("" : : : "memory")
/* Builtins */
#define likely(e) __builtin_expect(!!(e), 1)
#define unlikely(e) __builtin_expect(e, 0)
#define unreachable() __builtin_unreachable()
/* Keywords */
#define alignas _Alignas
#define alignof _Alignof
#define asm __asm__
#define fallthrough __attribute__((__fallthrough__))
#define noreturn _Noreturn
#define static_assert _Static_assert
/**
* Calculate the size of a struct containing a flexible array member.
*
* @param type The name of the structure type.
* @param member The name of the flexible array member.
* @param elements The number of elements in the flexible array member.
* @return The total size of the type.
*/
#define sizeof_struct(type, member, elements) \
(sizeof(type) + sizeof(*((type *)0)->member) * elements)
#endif /* LIB_COMPILER_H */
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