标准宏定义

编译器指令相关宏定义

#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
#define __CLANG_ARM
#endif

/* Compiler related definitions */
#if defined(__CC_ARM) || defined(__CLANG_ARM)   /* For ARM compiler */
    #define OS_SECTION(x)               __attribute__((section(x)))
    #define OS_ALIGN(n)                 __attribute__((aligned(n)))
    #define OS_UNUSED                   __attribute__((unused))
    #define OS_USED                     __attribute__((used))
    #define OS_WEAK                     __attribute__((weak))
    #define OS_INLINE                   static __inline
#elif defined (__IAR_SYSTEMS_ICC__)             /* For IAR compiler */
    #define OS_SECTION(x)               @ x
    #define OS_PRAGMA(x)                _Pragma(#x)
    #define OS_ALIGN(n)                 OS_PRAGMA(data_alignment=n)
    #define OS_UNUSED
    #define OS_USED                     __root
    #define OS_WEAK                     __weak
    #define OS_INLINE                   static inline
#elif defined (__GNUC__)                        /* For GNU GCC compiler */
    #define OS_SECTION(x)               __attribute__((section(x)))
    #define OS_ALIGN(n)                 __attribute__((aligned(n)))
    #define OS_UNUSED                   __attribute__((unused))
    #define OS_USED                     __attribute__((used))
    #define OS_WEAK                     __attribute__((weak))
    #define OS_INLINE                   static __inline
#elif defined (__ADSPBLACKFIN__)                /* For VisualDSP++ compiler */
    #define OS_SECTION(x)               __attribute__((section(x)))
    #define OS_ALIGN(n)                 __attribute__((aligned(n)))
    #define OS_UNUSED                   __attribute__((unused))
    #define OS_USED                     __attribute__((used))
    #define OS_WEAK                     __attribute__((weak))
    #define OS_INLINE                   static inline
#else
    #error Not supported tool chain
#endif

自动初始化相关宏定义

该功能用于在系统初始化过程中，自动执行被OS_INIT_EXPORT修饰的函数，其中的数字越小，优先级越高，越先被执行。定义如下：

/* Auto initialization function type */
typedef os_err_t (*os_init_fn_t)(void);

#define OS_INIT_EXPORT(fn, level)                                                           \
    OS_USED const os_init_fn_t __os_call_##fn OS_SECTION(".init_call."level) = fn

#define OS_BOARD_INIT(fn)       OS_INIT_EXPORT(fn, "1")     /* board init */
#define OS_PREV_INIT(fn)        OS_INIT_EXPORT(fn, "2")     /* pre-initialization except board(pure software initilization) */
#define OS_DEVICE_INIT(fn)      OS_INIT_EXPORT(fn, "3")     /* device initialization */
#define OS_CMPOENT_INIT(fn)     OS_INIT_EXPORT(fn, "4")     /* components initialization (dfs, lwip, ...) */
#define OS_ENV_INIT(fn)         OS_INIT_EXPORT(fn, "5")     /* environment initialization (mount disk, ...) */
#define OS_APP_INIT(fn)         OS_INIT_EXPORT(fn, "6")     /* appliation initialization */

其它宏定义

#ifdef __cplusplus
#define OS_NULL                         0
#else
#define OS_NULL                         ((void *)0)
#endif
#define OS_FALSE                        0
#define OS_TRUE                         1

#define OS_ALIGN_UP(size, align)        (((size) + (align) - 1) & ~((align) - 1))
#define OS_ALIGN_DOWN(size, align)      ((size) & ~((align) - 1))

#define OS_ARRAY_SIZE(x)                (sizeof(x) / sizeof(x[0]))
#define os_container_of(ptr, type, member)      \
    ((type *)((char *)(ptr) - (unsigned long)(&((type *)0)->member)))
#define os_offsetof(type, member)       ((os_size_t) &((type *)0)->member)