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/*
* kmod - interface to kernel module operations
*
* Copyright (C) 2011-2013 ProFUSION embedded systems
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <stddef.h>
#if defined(HAVE_STATIC_ASSERT)
#define assert_cc(expr) \
_Static_assert((expr), #expr)
#else
#define assert_cc(expr) \
do { (void) sizeof(char [1 - 2*!(expr)]); } while(0)
#endif
#define check_types_match(expr1, expr2) \
((typeof(expr1) *)0 != (typeof(expr2) *)0)
#define container_of(member_ptr, containing_type, member) \
((containing_type *) \
((char *)(member_ptr) - offsetof(containing_type, member)) \
- check_types_match(*(member_ptr), ((containing_type *)0)->member))
/* Two gcc extensions.
* &a[0] degrades to a pointer: a different type from an array */
#define _array_size_chk(arr) ({ \
assert_cc(!__builtin_types_compatible_p(typeof(arr), typeof(&(arr)[0]))); \
0; \
})
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + _array_size_chk(arr))
/* Temporaries for importing index handling */
#define NOFAIL(x) (x)
#define fatal(x...) do { } while (0)
/* Attributes */
#define _must_check_ __attribute__((warn_unused_result))
#define _printf_format_(a,b) __attribute__((format (printf, a, b)))
#define _unused_ __attribute__((unused))
#define _always_inline_ __inline__ __attribute__((always_inline))
#define _cleanup_(x) __attribute__((cleanup(x)))
/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
* compiler versions */
#ifndef noreturn
#if __STDC_VERSION__ >= 201112L
#define noreturn _Noreturn
#else
#define noreturn __attribute__((noreturn))
#endif
#endif
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