kolibrios/drivers/include/linux/bug.h

#ifndef _ASM_GENERIC_BUG_H
#define _ASM_GENERIC_BUG_H

#include <linux/compiler.h>

int printf(const char *fmt, ...);

#define __WARN()                printf("\nWARNING: at %s:%d\n", __FILE__, __LINE__)
//#define __WARN_printf(arg...)   printf("\nWARNING: at %s:%d\n", __FILE__, __LINE__)
#define __WARN_printf(arg...)   do { printf(arg); __WARN(); } while (0)

#define WARN(condition, format...) ({                                   \
        int __ret_warn_on = !!(condition);                              \
        if (unlikely(__ret_warn_on))                                    \
            __WARN_printf(format);                                      \
        unlikely(__ret_warn_on);                                        \
})


#define WARN_ON(condition) ({                                           \
        int __ret_warn_on = !!(condition);                              \
        if (unlikely(__ret_warn_on))                                    \
                __WARN();                                               \
        unlikely(__ret_warn_on);                                        \
})


#define WARN_ONCE(condition, format...) ({                      \
        static bool __warned;                                   \
        int __ret_warn_once = !!(condition);                    \
                                                                \
        if (unlikely(__ret_warn_once))                          \
                if (WARN(!__warned, format))                    \
                        __warned = true;                        \
        unlikely(__ret_warn_once);                              \
})


#define WARN_ON_ONCE(condition) ({                              \
        static bool __warned;                                   \
        int __ret_warn_once = !!(condition);                    \
                                                                \
        if (unlikely(__ret_warn_once))                          \
                if (WARN_ON(!__warned))                         \
                        __warned = true;                        \
        unlikely(__ret_warn_once);                              \
})

#define BUG() do { \
         printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
 } while (0)

#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)

/* Force a compilation error if a constant expression is not a power of 2 */
#define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\
	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))

/* Force a compilation error if condition is true, but also produce a
   result (of value 0 and type size_t), so the expression can be used
   e.g. in a structure initializer (or where-ever else comma expressions
   aren't permitted). */
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))

/*
 * BUILD_BUG_ON_INVALID() permits the compiler to check the validity of the
 * expression but avoids the generation of any code, even if that expression
 * has side-effects.
 */
#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))

/**
 * BUILD_BUG_ON_MSG - break compile if a condition is true & emit supplied
 *		      error message.
 * @condition: the condition which the compiler should know is false.
 *
 * See BUILD_BUG_ON for description.
 */
#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)

/**
 * BUILD_BUG_ON - break compile if a condition is true.
 * @condition: the condition which the compiler should know is false.
 *
 * If you have some code which relies on certain constants being equal, or
 * some other compile-time-evaluated condition, you should use BUILD_BUG_ON to
 * detect if someone changes it.
 *
 * The implementation uses gcc's reluctance to create a negative array, but gcc
 * (as of 4.4) only emits that error for obvious cases (e.g. not arguments to
 * inline functions).  Luckily, in 4.3 they added the "error" function
 * attribute just for this type of case.  Thus, we use a negative sized array
 * (should always create an error on gcc versions older than 4.4) and then call
 * an undefined function with the error attribute (should always create an
 * error on gcc 4.3 and later).  If for some reason, neither creates a
 * compile-time error, we'll still have a link-time error, which is harder to
 * track down.
 */
#ifndef __OPTIMIZE__
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#else
#define BUILD_BUG_ON(condition) \
	BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
#endif

/**
 * BUILD_BUG - break compile if used.
 *
 * If you have some code that you expect the compiler to eliminate at
 * build time, you should use BUILD_BUG to detect if it is
 * unexpectedly used.
 */
#define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")




#define pr_warn_once(fmt, ...)                                  \
        printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)

#endif