os_kernel/kernel/debug.h

#ifndef __KERNEL_DEBUG_H
#define __KERNEL_DEBUG_H
void panic_spin(char *filename, int line, const char *func, const char *condition);

/**
 * @brief  panic 是一个宏，__VA_ARGS__ 表示可变参数，即 ...，用于传递参数
 * __VA_ARGS__ 是预处理器所支持的专用标识符。代表所有与省略号相对应的参数
 * “...” 表示定义的宏其参数可变
 */
#define PANIC(...) panic_spin(__FILE__, __LINE__, __func__, __VA_ARGS__)

#ifdef NDEBUG
#define ASSERT(CONDITION) ((void)0)
#else
#define ASSERT(CONDITION)  \
    if (CONDITION)         \
    {                      \
    }                      \
    else                   \
    {                      \
        PANIC(#CONDITION); \
    }
#endif // NDEBUG

#ifdef UNUSED
#elif defined(__GNUC__)
#define UNUSED(x) UNUSED_##x __attribute__((unused))
#elif defined(__clang__)
#define UNUSED(x) _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wunused-parameter\"") \
    x _Pragma("clang diagnostic pop")
#elif defined(__LCLINT__)
#define UNUSED(x) /*@unused@*/ x
#elif defined(_MSC_VER)
#define UNUSED(x) __pragma(warning(push)) __pragma(warning(disable : 4101)) x __pragma(warning(pop)) // warning C4101: unreferenced local variable
#elif defined(__ICC)
#define UNUSED(x) x __attribute__((unused))
#else
#warning "Platform doesn't support attribute 'unused'"
#define UNUSED(x) (void)x
#endif // UNUSED

#endif // __KERNEL_DEBUG_H