rt-thread/include/rtdef.h

/*
 * Copyright (c) 2006-2024, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2007-01-10     Bernard      the first version
 * 2008-07-12     Bernard      remove all rt_int8, rt_uint32_t etc typedef
 * 2010-10-26     yi.qiu       add module support
 * 2010-11-10     Bernard      add cleanup callback function in thread exit.
 * 2011-05-09     Bernard      use builtin va_arg in GCC 4.x
 * 2012-11-16     Bernard      change RT_NULL from ((void*)0) to 0.
 * 2012-12-29     Bernard      change the RT_USING_MEMPOOL location and add
 *                             RT_USING_MEMHEAP condition.
 * 2012-12-30     Bernard      add more control command for graphic.
 * 2013-01-09     Bernard      change version number.
 * 2015-02-01     Bernard      change version number to v2.1.0
 * 2017-08-31     Bernard      change version number to v3.0.0
 * 2017-11-30     Bernard      change version number to v3.0.1
 * 2017-12-27     Bernard      change version number to v3.0.2
 * 2018-02-24     Bernard      change version number to v3.0.3
 * 2018-04-25     Bernard      change version number to v3.0.4
 * 2018-05-31     Bernard      change version number to v3.1.0
 * 2018-09-04     Bernard      change version number to v3.1.1
 * 2018-09-14     Bernard      apply Apache License v2.0 to RT-Thread Kernel
 * 2018-10-13     Bernard      change version number to v4.0.0
 * 2018-10-02     Bernard      add 64bit arch support
 * 2018-11-22     Jesven       add smp member to struct rt_thread
 *                             add struct rt_cpu
 *                             add smp relevant macros
 * 2019-01-27     Bernard      change version number to v4.0.1
 * 2019-05-17     Bernard      change version number to v4.0.2
 * 2019-12-20     Bernard      change version number to v4.0.3
 * 2020-08-10     Meco Man     add macro for struct rt_device_ops
 * 2020-10-23     Meco Man     define maximum value of ipc type
 * 2021-03-19     Meco Man     add security devices
 * 2021-05-10     armink       change version number to v4.0.4
 * 2021-11-19     Meco Man     change version number to v4.1.0
 * 2021-12-21     Meco Man     re-implement RT_UNUSED
 * 2022-01-01     Gabriel      improve hooking method
 * 2022-01-07     Gabriel      move some __on_rt_xxxxx_hook to dedicated c source files
 * 2022-01-12     Meco Man     remove RT_THREAD_BLOCK
 * 2022-04-20     Meco Man     change version number to v4.1.1
 * 2022-04-21     THEWON       add macro RT_VERSION_CHECK
 * 2022-06-29     Meco Man     add RT_USING_LIBC and standard libc headers
 * 2022-08-16     Meco Man     change version number to v5.0.0
 * 2022-09-12     Meco Man     define rt_ssize_t
 * 2022-12-20     Meco Man     add const name for rt_object
 * 2023-04-01     Chushicheng  change version number to v5.0.1
 * 2023-05-20     Bernard      add stdc atomic detection.
 * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
 * 2023-10-10     Chushicheng  change version number to v5.1.0
 * 2023-10-11     zmshahaha    move specific devices related and driver to components/drivers
 * 2023-11-21     Meco Man     add RT_USING_NANO macro
 * 2023-11-17     xqyjlj       add process group and session support
 * 2023-12-01     Shell        Support of dynamic device
 * 2023-12-18     xqyjlj       add rt_always_inline
 * 2023-12-22     Shell        Support hook list
 * 2024-01-18     Shell        Seperate basical types to a rttypes.h
 *                             Seperate the compiler portings to rtcompiler.h
 * 2024-03-30     Meco Man     update version number to v5.2.0
 */

#ifndef __RT_DEF_H__
#define __RT_DEF_H__

#include "rtsched.h"
#include "rttypes.h"

#include "klibc/kerrno.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @addtogroup BasicDef
 */

/**@{*/

/* RT-Thread version information */
#define RT_VERSION_MAJOR                5               /**< Major version number (X.x.x) */
#define RT_VERSION_MINOR                2               /**< Minor version number (x.X.x) */
#define RT_VERSION_PATCH                0               /**< Patch version number (x.x.X) */

/* e.g. #if (RTTHREAD_VERSION >= RT_VERSION_CHECK(4, 1, 0) */
#define RT_VERSION_CHECK(major, minor, revise)          ((major * 10000U) + (minor * 100U) + revise)

/* RT-Thread version */
#define RTTHREAD_VERSION                RT_VERSION_CHECK(RT_VERSION_MAJOR, RT_VERSION_MINOR, RT_VERSION_PATCH)

/**@}*/

/* maximum value of base type */
#ifdef RT_USING_LIBC
#define RT_UINT8_MAX                    UINT8_MAX       /**< Maximum number of UINT8 */
#define RT_UINT16_MAX                   UINT16_MAX      /**< Maximum number of UINT16 */
#define RT_UINT32_MAX                   UINT32_MAX      /**< Maximum number of UINT32 */
#define RT_UINT64_MAX                   UINT64_MAX      /**< Maximum number of UINT64 */
#else
#define RT_UINT8_MAX                    0xFFU                 /**< Maximum number of UINT8 */
#define RT_UINT16_MAX                   0xFFFFU               /**< Maximum number of UINT16 */
#define RT_UINT32_MAX                   0xFFFFFFFFUL          /**< Maximum number of UINT32 */
#define RT_UINT64_MAX                   0xFFFFFFFFFFFFFFFFULL /**< Maximum number of UINT64 */
#endif /* RT_USING_LIBC */

#define RT_TICK_MAX                     RT_UINT32_MAX   /**< Maximum number of tick */

/* maximum value of ipc type */
#define RT_SEM_VALUE_MAX                RT_UINT16_MAX   /**< Maximum number of semaphore .value */
#define RT_MUTEX_VALUE_MAX              RT_UINT16_MAX   /**< Maximum number of mutex .value */
#define RT_MUTEX_HOLD_MAX               RT_UINT8_MAX    /**< Maximum number of mutex .hold */
#define RT_MB_ENTRY_MAX                 RT_UINT16_MAX   /**< Maximum number of mailbox .entry */
#define RT_MQ_ENTRY_MAX                 RT_UINT16_MAX   /**< Maximum number of message queue .entry */

/* Common Utilities */

#define RT_UNUSED(x)                   ((void)(x))

/* compile time assertion */
#define RT_STATIC_ASSERT(name, expn) typedef char _static_assert_##name[(expn)?1:-1]

/* Compiler Related Definitions */
#include "rtcompiler.h"

/* initialization export */
#ifdef RT_USING_COMPONENTS_INIT
typedef int (*init_fn_t)(void);
#ifdef _MSC_VER
#pragma section("rti_fn$f",read)
    #ifdef RT_DEBUGING_AUTO_INIT
        struct rt_init_desc
        {
            const char* level;
            const init_fn_t fn;
            const char* fn_name;
        };
        #define INIT_EXPORT(fn, level)                                  \
                                const char __rti_level_##fn[] = ".rti_fn." level;       \
                                const char __rti_##fn##_name[] = #fn;                   \
                                __declspec(allocate("rti_fn$f"))                        \
                                rt_used const struct rt_init_desc __rt_init_msc_##fn =  \
                                {__rti_level_##fn, fn, __rti_##fn##_name};
    #else
        struct rt_init_desc
        {
            const char* level;
            const init_fn_t fn;
        };
        #define INIT_EXPORT(fn, level)                                  \
                                const char __rti_level_##fn[] = ".rti_fn." level;       \
                                __declspec(allocate("rti_fn$f"))                        \
                                rt_used const struct rt_init_desc __rt_init_msc_##fn =  \
                                {__rti_level_##fn, fn };
    #endif /* RT_DEBUGING_AUTO_INIT */
#else
    #ifdef RT_DEBUGING_AUTO_INIT
        struct rt_init_desc
        {
            const char* fn_name;
            const init_fn_t fn;
        };
        #define INIT_EXPORT(fn, level)                                                       \
            const char __rti_##fn##_name[] = #fn;                                            \
            rt_used const struct rt_init_desc __rt_init_desc_##fn rt_section(".rti_fn." level) = \
            { __rti_##fn##_name, fn};
    #else
        #define INIT_EXPORT(fn, level)                                                       \
            rt_used const init_fn_t __rt_init_##fn rt_section(".rti_fn." level) = fn
    #endif /* RT_DEBUGING_AUTO_INIT */
#endif /* _MSC_VER */
#else
#define INIT_EXPORT(fn, level)
#endif /* RT_USING_COMPONENTS_INIT */

/* board init routines will be called in board_init() function */
#define INIT_BOARD_EXPORT(fn)           INIT_EXPORT(fn, "1")

/* init cpu, memory, interrupt-controller, bus... */
#define INIT_CORE_EXPORT(fn)            INIT_EXPORT(fn, "1.0")
/* init pci/pcie, usb platform driver... */
#define INIT_FRAMEWORK_EXPORT(fn)       INIT_EXPORT(fn, "1.1")
/* init platform, user code... */
#define INIT_PLATFORM_EXPORT(fn)        INIT_EXPORT(fn, "1.2")
/* init sys-timer, clk, pinctrl... */
#define INIT_SUBSYS_EARLY_EXPORT(fn)    INIT_EXPORT(fn, "1.3.0")
#define INIT_SUBSYS_EXPORT(fn)          INIT_EXPORT(fn, "1.3.1")
/* init early drivers */
#define INIT_DRIVER_EARLY_EXPORT(fn)    INIT_EXPORT(fn, "1.4")

/* pre/device/component/env/app init routines will be called in init_thread */
/* components pre-initialization (pure software initialization) */
#define INIT_PREV_EXPORT(fn)            INIT_EXPORT(fn, "2")
/* device initialization */
#define INIT_DEVICE_EXPORT(fn)          INIT_EXPORT(fn, "3")
/* components initialization (dfs, lwip, ...) */
#define INIT_COMPONENT_EXPORT(fn)       INIT_EXPORT(fn, "4")
/* environment initialization (mount disk, ...) */
#define INIT_ENV_EXPORT(fn)             INIT_EXPORT(fn, "5")
/* application initialization (rtgui application etc ...) */
#define INIT_APP_EXPORT(fn)             INIT_EXPORT(fn, "6")

/* init after mount fs */
#define INIT_FS_EXPORT(fn)              INIT_EXPORT(fn, "6.0")
/* init in secondary_cpu_c_start */
#define INIT_SECONDARY_CPU_EXPORT(fn)   INIT_EXPORT(fn, "7")

#if !defined(RT_USING_FINSH)
/* define these to empty, even if not include finsh.h file */
#define FINSH_FUNCTION_EXPORT(name, desc)
#define FINSH_FUNCTION_EXPORT_ALIAS(name, alias, desc)

#define MSH_CMD_EXPORT(command, desc)
#define MSH_CMD_EXPORT_ALIAS(command, alias, desc)
#elif !defined(FINSH_USING_SYMTAB)
#define FINSH_FUNCTION_EXPORT_CMD(name, cmd, desc)
#endif

/* event length */
#define RT_EVENT_LENGTH                 32

/* memory management option */
#define RT_MM_PAGE_SIZE                 4096
#define RT_MM_PAGE_MASK                 (RT_MM_PAGE_SIZE - 1)
#define RT_MM_PAGE_BITS                 12

/* kernel malloc definitions */
#ifndef RT_KERNEL_MALLOC
#define RT_KERNEL_MALLOC(sz)            rt_malloc(sz)
#endif /* RT_KERNEL_MALLOC */

#ifndef RT_KERNEL_FREE
#define RT_KERNEL_FREE(ptr)             rt_free(ptr)
#endif /* RT_KERNEL_FREE */

#ifndef RT_KERNEL_REALLOC
#define RT_KERNEL_REALLOC(ptr, size)    rt_realloc(ptr, size)
#endif /* RT_KERNEL_REALLOC */

/**
 * @ingroup BasicDef
 *
 * @def RT_IS_ALIGN(addr, align)
 * Return true(1) or false(0).
 *     RT_IS_ALIGN(128, 4) is judging whether 128 aligns with 4.
 *     The result is 1, which means 128 aligns with 4.
 * @note If the address is NULL, false(0) will be returned
 */
#define RT_IS_ALIGN(addr, align) ((!(addr & (align - 1))) && (addr != RT_NULL))

/**
 * @ingroup BasicDef
 *
 * @def RT_ALIGN(size, align)
 * Return the most contiguous size aligned at specified width. RT_ALIGN(13, 4)
 * would return 16.
 */
#define RT_ALIGN(size, align)           (((size) + (align) - 1) & ~((align) - 1))

/**
 * @ingroup BasicDef
 *
 * @def RT_ALIGN_DOWN(size, align)
 * Return the down number of aligned at specified width. RT_ALIGN_DOWN(13, 4)
 * would return 12.
 */
#define RT_ALIGN_DOWN(size, align)      ((size) & ~((align) - 1))

/**
 * @addtogroup KernelObject
 */

/**@{*/

/*
 * kernel object macros
 */
#define RT_OBJECT_FLAG_MODULE           0x80            /**< is module object. */

/**
 * Base structure of Kernel object
 */
struct rt_object
{
#if RT_NAME_MAX > 0
    char        name[RT_NAME_MAX];                       /**< dynamic name of kernel object */
#else
    const char *name;                                    /**< static name of kernel object */
#endif /* RT_NAME_MAX > 0 */
    rt_uint8_t  type;                                    /**< type of kernel object */
    rt_uint8_t  flag;                                    /**< flag of kernel object */

#ifdef RT_USING_MODULE
    void      * module_id;                               /**< id of application module */
#endif /* RT_USING_MODULE */

#ifdef RT_USING_SMART
    rt_atomic_t lwp_ref_count;                           /**< ref count for lwp */
#endif /* RT_USING_SMART */

    rt_list_t   list;                                    /**< list node of kernel object */
};
typedef struct rt_object *rt_object_t;                   /**< Type for kernel objects. */

/**
 * iterator of rt_object_for_each()
 *
 * data is the data passing in to rt_object_for_each(). iterator can return
 * RT_EOK to continue the iteration; or any positive value to break the loop
 * successfully; or any negative errno to break the loop on failure.
 */
typedef rt_err_t (*rt_object_iter_t)(rt_object_t object, void *data);

/**
 *  The object type can be one of the follows with specific
 *  macros enabled:
 *  - Thread
 *  - Semaphore
 *  - Mutex
 *  - Event
 *  - MailBox
 *  - MessageQueue
 *  - MemHeap
 *  - MemPool
 *  - Device
 *  - Timer
 *  - Module
 *  - Unknown
 *  - Static
 */
enum rt_object_class_type
{
    RT_Object_Class_Null          = 0x00,      /**< The object is not used. */
    RT_Object_Class_Thread        = 0x01,      /**< The object is a thread. */
    RT_Object_Class_Semaphore     = 0x02,      /**< The object is a semaphore. */
    RT_Object_Class_Mutex         = 0x03,      /**< The object is a mutex. */
    RT_Object_Class_Event         = 0x04,      /**< The object is a event. */
    RT_Object_Class_MailBox       = 0x05,      /**< The object is a mail box. */
    RT_Object_Class_MessageQueue  = 0x06,      /**< The object is a message queue. */
    RT_Object_Class_MemHeap       = 0x07,      /**< The object is a memory heap. */
    RT_Object_Class_MemPool       = 0x08,      /**< The object is a memory pool. */
    RT_Object_Class_Device        = 0x09,      /**< The object is a device. */
    RT_Object_Class_Timer         = 0x0a,      /**< The object is a timer. */
    RT_Object_Class_Module        = 0x0b,      /**< The object is a module. */
    RT_Object_Class_Memory        = 0x0c,      /**< The object is a memory. */
    RT_Object_Class_Channel       = 0x0d,      /**< The object is a channel */
    RT_Object_Class_ProcessGroup  = 0x0e,      /**< The object is a process group */
    RT_Object_Class_Session       = 0x0f,      /**< The object is a session */
    RT_Object_Class_Custom        = 0x10,      /**< The object is a custom object */
    RT_Object_Class_Unknown       = 0x11,      /**< The object is unknown. */
    RT_Object_Class_Static        = 0x80       /**< The object is a static object. */
};

/**
 * The information of the kernel object
 */
struct rt_object_information
{
    enum rt_object_class_type type;                     /**< object class type */
    rt_list_t                 object_list;              /**< object list */
    rt_size_t                 object_size;              /**< object size */
    struct rt_spinlock        spinlock;
};

/**
 * The hook function call macro
 */
#ifndef RT_USING_HOOK
#define RT_OBJECT_HOOK_CALL(func, argv)

#else

/**
 * @brief Add hook point in the routines
 * @note Usage:
 * void foo() {
 *     do_something();
 *
 *     RT_OBJECT_HOOK_CALL(foo);
 *
 *     do_other_things();
 * }
 */
#define _RT_OBJECT_HOOK_CALL(func, argv) __ON_HOOK_ARGS(func, argv)
#define RT_OBJECT_HOOK_CALL(func, argv)  _RT_OBJECT_HOOK_CALL(func, argv)

    #ifdef RT_HOOK_USING_FUNC_PTR
        #define __ON_HOOK_ARGS(__hook, argv)        do {if ((__hook) != RT_NULL) __hook argv; } while (0)
    #else
        #define __ON_HOOK_ARGS(__hook, argv)
    #endif /* RT_HOOK_USING_FUNC_PTR */
#endif /* RT_USING_HOOK */

#ifdef RT_USING_HOOKLIST

/**
 * @brief Add declaration for hook list types.
 *
 * @note Usage:
 * This is typically used in your header. In foo.h using this like:
 *
 * ```foo.h
 *     typedef void (*bar_hook_proto_t)(arguments...);
 *     RT_OBJECT_HOOKLIST_DECLARE(bar_hook_proto_t, bar_myhook);
 * ```
 */
#define RT_OBJECT_HOOKLIST_DECLARE(handler_type, name) \
    typedef struct name##_hooklistnode                 \
    {                                                  \
        handler_type handler;                          \
        rt_list_t list_node;                           \
    } *name##_hooklistnode_t;                          \
    extern volatile rt_ubase_t name##_nested;          \
    void name##_sethook(name##_hooklistnode_t node);   \
    void name##_rmhook(name##_hooklistnode_t node)

/**
 * @brief Add declaration for hook list node.
 *
 * @note Usage
 * You can add a hook like this.
 *
 * ```addhook.c
 * void myhook(arguments...) { do_something(); }
 * RT_OBJECT_HOOKLIST_DEFINE_NODE(bar_myhook, myhook_node, myhook);
 *
 * void addhook(void)
 * {
 *      bar_myhook_sethook(myhook);
 * }
 * ```
 *
 * BTW, you can also find examples codes under
 * `examples/utest/testcases/kernel/hooklist_tc.c`.
 */
#define RT_OBJECT_HOOKLIST_DEFINE_NODE(hookname, nodename, hooker_handler) \
    struct hookname##_hooklistnode nodename = {                            \
        .handler = hooker_handler,                                         \
        .list_node = RT_LIST_OBJECT_INIT(nodename.list_node),              \
    };

/**
 * @note Usage
 * Add this macro to the source file where your hook point is inserted.
 */
#define RT_OBJECT_HOOKLIST_DEFINE(name)                                      \
    static rt_list_t name##_hooklist = RT_LIST_OBJECT_INIT(name##_hooklist); \
    static struct rt_spinlock name##lock = RT_SPINLOCK_INIT;                 \
    volatile rt_ubase_t name##_nested = 0;                                   \
    void name##_sethook(name##_hooklistnode_t node)                          \
    {                                                                        \
        rt_ubase_t level = rt_spin_lock_irqsave(&name##lock);                \
        while (name##_nested)                                                \
        {                                                                    \
            rt_spin_unlock_irqrestore(&name##lock, level);                   \
            level = rt_spin_lock_irqsave(&name##lock);                       \
        }                                                                    \
        rt_list_insert_before(&name##_hooklist, &node->list_node);           \
        rt_spin_unlock_irqrestore(&name##lock, level);                       \
    }                                                                        \
    void name##_rmhook(name##_hooklistnode_t node)                           \
    {                                                                        \
        rt_ubase_t level = rt_spin_lock_irqsave(&name##lock);                \
        while (name##_nested)                                                \
        {                                                                    \
            rt_spin_unlock_irqrestore(&name##lock, level);                   \
            level = rt_spin_lock_irqsave(&name##lock);                       \
        }                                                                    \
        rt_list_remove(&node->list_node);                                    \
        rt_spin_unlock_irqrestore(&name##lock, level);                       \
    }

/**
 * @brief Add hook list point in the routines. Multiple hookers in the list will
 *        be called one by one starting from head node.
 *
 * @note Usage:
 * void foo() {
 *     do_something();
 *
 *     RT_OBJECT_HOOKLIST_CALL(foo);
 *
 *     do_other_things();
 * }
 */
#define _RT_OBJECT_HOOKLIST_CALL(nodetype, nested, list, lock, argv)  \
    do                                                                \
    {                                                                 \
        nodetype iter, next;                                          \
        rt_ubase_t level = rt_spin_lock_irqsave(&lock);               \
        nested += 1;                                                  \
        rt_spin_unlock_irqrestore(&lock, level);                      \
        if (!rt_list_isempty(&list))                                  \
        {                                                             \
            rt_list_for_each_entry_safe(iter, next, &list, list_node) \
            {                                                         \
                iter->handler argv;                                   \
            }                                                         \
        }                                                             \
        level = rt_spin_lock_irqsave(&lock);                          \
        nested -= 1;                                                  \
        rt_spin_unlock_irqrestore(&lock, level);                      \
    } while (0)
#define RT_OBJECT_HOOKLIST_CALL(name, argv)                        \
    _RT_OBJECT_HOOKLIST_CALL(name##_hooklistnode_t, name##_nested, \
                             name##_hooklist, name##lock, argv)

#else

#define RT_OBJECT_HOOKLIST_DECLARE(handler_type, name)
#define RT_OBJECT_HOOKLIST_DEFINE_NODE(hookname, nodename, hooker_handler)
#define RT_OBJECT_HOOKLIST_DEFINE(name)
#define RT_OBJECT_HOOKLIST_CALL(name, argv)
#endif /* RT_USING_HOOKLIST */

/**@}*/

/**
 * @addtogroup Clock
 */

/**@{*/

/**
 * clock & timer macros
 */
#define RT_TIMER_FLAG_DEACTIVATED       0x0             /**< timer is deactive */
#define RT_TIMER_FLAG_ACTIVATED         0x1             /**< timer is active */
#define RT_TIMER_FLAG_ONE_SHOT          0x0             /**< one shot timer */
#define RT_TIMER_FLAG_PERIODIC          0x2             /**< periodic timer */

#define RT_TIMER_FLAG_HARD_TIMER        0x0             /**< hard timer,the timer's callback function will be called in tick isr. */
#define RT_TIMER_FLAG_SOFT_TIMER        0x4             /**< soft timer,the timer's callback function will be called in timer thread. */
#define RT_TIMER_FLAG_THREAD_TIMER \
    (0x8 | RT_TIMER_FLAG_HARD_TIMER)                    /**< thread timer that cooperates with scheduler directly */

#define RT_TIMER_CTRL_SET_TIME          0x0             /**< set timer control command */
#define RT_TIMER_CTRL_GET_TIME          0x1             /**< get timer control command */
#define RT_TIMER_CTRL_SET_ONESHOT       0x2             /**< change timer to one shot */
#define RT_TIMER_CTRL_SET_PERIODIC      0x3             /**< change timer to periodic */
#define RT_TIMER_CTRL_GET_STATE         0x4             /**< get timer run state active or deactive*/
#define RT_TIMER_CTRL_GET_REMAIN_TIME   0x5             /**< get the remaining hang time */
#define RT_TIMER_CTRL_GET_FUNC          0x6             /**< get timer timeout func  */
#define RT_TIMER_CTRL_SET_FUNC          0x7             /**< set timer timeout func  */
#define RT_TIMER_CTRL_GET_PARM          0x8             /**< get timer parameter  */
#define RT_TIMER_CTRL_SET_PARM          0x9             /**< get timer parameter  */

#ifndef RT_TIMER_SKIP_LIST_LEVEL
#define RT_TIMER_SKIP_LIST_LEVEL          1
#endif

/* 1 or 3 */
#ifndef RT_TIMER_SKIP_LIST_MASK
#define RT_TIMER_SKIP_LIST_MASK         0x3             /**< Timer skips the list mask */
#endif

/**
 * timeout handler of rt_timer
 */
typedef void (*rt_timer_func_t)(void *parameter);

/**
 * timer structure
 */
struct rt_timer
{
    struct rt_object parent;                            /**< inherit from rt_object */

    rt_list_t        row[RT_TIMER_SKIP_LIST_LEVEL];

    rt_timer_func_t  timeout_func;                      /**< timeout function */
    void             *parameter;                        /**< timeout function's parameter */

    rt_tick_t        init_tick;                         /**< timer timeout tick */
    rt_tick_t        timeout_tick;                      /**< timeout tick */
};
typedef struct rt_timer *rt_timer_t;

/**@}*/

/**
 * @addtogroup Signal
 */
/**@{*/

#ifdef RT_USING_SIGNALS
#define RT_SIG_MAX          32
typedef unsigned long rt_sigset_t;
typedef siginfo_t rt_siginfo_t;
typedef void (*rt_sighandler_t)(int signo);
#endif /* RT_USING_SIGNALS */
/**@}*/

/**
 * @addtogroup Thread
 */

/**@{*/

/*
 * Thread
 */

/*
 * thread state definitions
 */
#define RT_THREAD_INIT                       0x00                /**< Initialized status */
#define RT_THREAD_CLOSE                      0x01                /**< Closed status */
#define RT_THREAD_READY                      0x02                /**< Ready status */
#define RT_THREAD_RUNNING                    0x03                /**< Running status */

/*
 * for rt_thread_suspend_with_flag()
 */
enum
{
    RT_INTERRUPTIBLE = 0,
    RT_KILLABLE,
    RT_UNINTERRUPTIBLE,
};

#define RT_THREAD_SUSPEND_MASK               0x04
#define RT_SIGNAL_COMMON_WAKEUP_MASK         0x02
#define RT_SIGNAL_KILL_WAKEUP_MASK           0x01

#define RT_THREAD_SUSPEND_INTERRUPTIBLE      (RT_THREAD_SUSPEND_MASK)                                                             /**< Suspend interruptable 0x4 */
#define RT_THREAD_SUSPEND                    RT_THREAD_SUSPEND_INTERRUPTIBLE
#define RT_THREAD_SUSPEND_KILLABLE           (RT_THREAD_SUSPEND_MASK | RT_SIGNAL_COMMON_WAKEUP_MASK)                              /**< Suspend with killable 0x6 */
#define RT_THREAD_SUSPEND_UNINTERRUPTIBLE    (RT_THREAD_SUSPEND_MASK | RT_SIGNAL_COMMON_WAKEUP_MASK | RT_SIGNAL_KILL_WAKEUP_MASK) /**< Suspend with uninterruptable 0x7 */
#define RT_THREAD_STAT_MASK                  0x07

#define RT_THREAD_STAT_YIELD            0x08                /**< indicate whether remaining_tick has been reloaded since last schedule */
#define RT_THREAD_STAT_YIELD_MASK       RT_THREAD_STAT_YIELD

#define RT_THREAD_STAT_SIGNAL           0x10                /**< task hold signals */
#define RT_THREAD_STAT_SIGNAL_READY     (RT_THREAD_STAT_SIGNAL | RT_THREAD_READY)
#define RT_THREAD_STAT_SIGNAL_WAIT      0x20                /**< task is waiting for signals */
#define RT_THREAD_STAT_SIGNAL_PENDING   0x40                /**< signals is held and it has not been procressed */
#define RT_THREAD_STAT_SIGNAL_MASK      0xf0

/**
 * thread control command definitions
 */
#define RT_THREAD_CTRL_STARTUP          0x00                /**< Startup thread. */
#define RT_THREAD_CTRL_CLOSE            0x01                /**< Close thread. */
#define RT_THREAD_CTRL_CHANGE_PRIORITY  0x02                /**< Change thread priority. */
#define RT_THREAD_CTRL_INFO             0x03                /**< Get thread information. */
#define RT_THREAD_CTRL_BIND_CPU         0x04                /**< Set thread bind cpu. */

/**
 * CPU usage statistics data
 */
struct rt_cpu_usage_stats
{
    rt_ubase_t user;
    rt_ubase_t system;
    rt_ubase_t irq;
    rt_ubase_t idle;
};
typedef struct rt_cpu_usage_stats *rt_cpu_usage_stats_t;

#ifdef RT_USING_SMP

#define RT_CPU_DETACHED                 RT_CPUS_NR          /**< The thread not running on cpu. */
#define RT_CPU_MASK                     ((1 << RT_CPUS_NR) - 1) /**< All CPUs mask bit. */

#ifndef RT_SCHEDULE_IPI
#define RT_SCHEDULE_IPI                 0
#endif /* RT_SCHEDULE_IPI */

#ifndef RT_STOP_IPI
#define RT_STOP_IPI                     1
#endif /* RT_STOP_IPI */

#ifndef RT_FUNC_IPI
#define RT_FUNC_IPI                     2
#endif

#define RT_MAX_IPI                      3

#define _SCHEDULER_CONTEXT(fileds) fileds

/**
 * CPUs definitions
 *
 */
struct rt_cpu
{
    /**
     * protected by:
     *   - other cores: accessing from other coress is undefined behaviour
     *   - local core: rt_enter_critical()/rt_exit_critical()
     */
    _SCHEDULER_CONTEXT(
        struct rt_thread        *current_thread;

        rt_uint8_t              irq_switch_flag:1;
        rt_uint8_t              sched_lock_flag:1;
#ifndef ARCH_USING_HW_THREAD_SELF
        rt_uint8_t              critical_switch_flag:1;
#endif /* ARCH_USING_HW_THREAD_SELF */

        rt_uint8_t              current_priority;
        rt_list_t               priority_table[RT_THREAD_PRIORITY_MAX];
    #if RT_THREAD_PRIORITY_MAX > 32
        rt_uint32_t             priority_group;
        rt_uint8_t              ready_table[32];
    #else
        rt_uint32_t             priority_group;
    #endif /* RT_THREAD_PRIORITY_MAX > 32 */

        rt_atomic_t             tick;   /**< Passing tickes on this core */
    );

    struct rt_thread            *idle_thread;
    rt_atomic_t                 irq_nest;

#ifdef RT_USING_SMART
    struct rt_spinlock          spinlock;
#endif /* RT_USING_SMART */
#ifdef RT_USING_CPU_USAGE_TRACER
    struct rt_cpu_usage_stats   cpu_stat;
#endif /* RT_USING_CPU_USAGE_TRACER */
#ifdef ARCH_USING_IRQ_CTX_LIST
    rt_slist_t                  irq_ctx_head;
#endif /* ARCH_USING_IRQ_CTX_LIST */
};

#else /* !RT_USING_SMP */
struct rt_cpu
{
    struct rt_thread            *current_thread;
    struct rt_thread            *idle_thread;

#ifdef RT_USING_CPU_USAGE_TRACER
    struct rt_cpu_usage_stats   cpu_stat;
#endif /* RT_USING_CPU_USAGE_TRACER */
#ifdef ARCH_USING_IRQ_CTX_LIST
    rt_slist_t                  irq_ctx_head;
#endif /* ARCH_USING_IRQ_CTX_LIST */
};

#endif /* RT_USING_SMP */

typedef struct rt_cpu *rt_cpu_t;
/* Noted: As API to reject writing to this variable from application codes */
#define rt_current_thread rt_thread_self()

struct rt_thread;

/**
 * interrupt/exception frame handling
 *
 */

typedef struct rt_interrupt_context {
    void *context;      /**< arch specific context */
    rt_slist_t node;    /**< node for nested interrupt */
} *rt_interrupt_context_t;

#ifdef RT_USING_SMART
typedef rt_err_t (*rt_wakeup_func_t)(void *object, struct rt_thread *thread);

struct rt_wakeup
{
    rt_wakeup_func_t func;
    void *user_data;
};

#define _LWP_NSIG       64

#ifdef ARCH_CPU_64BIT
#define _LWP_NSIG_BPW   64
#else
#define _LWP_NSIG_BPW   32
#endif

#define _LWP_NSIG_WORDS (RT_ALIGN(_LWP_NSIG, _LWP_NSIG_BPW) / _LWP_NSIG_BPW)

typedef void (*lwp_sighandler_t)(int);
typedef void (*lwp_sigaction_t)(int signo, siginfo_t *info, void *context);

typedef struct {
    unsigned long sig[_LWP_NSIG_WORDS];
} lwp_sigset_t;

#if _LWP_NSIG <= 64
#define lwp_sigmask(signo)      ((lwp_sigset_t){.sig = {[0] = ((long)(1u << ((signo)-1)))}})
#define lwp_sigset_init(mask)   ((lwp_sigset_t){.sig = {[0] = (long)(mask)}})
#endif /* _LWP_NSIG <= 64 */

struct lwp_sigaction {
    union {
        void (*_sa_handler)(int);
        void (*_sa_sigaction)(int, siginfo_t *, void *);
    } __sa_handler;
    lwp_sigset_t sa_mask;
    int sa_flags;
    void (*sa_restorer)(void);
};

typedef struct lwp_siginfo_ext {
    union {
        /* for SIGCHLD */
        struct {
            int status;
            clock_t utime;
            clock_t stime;
        } sigchld;
    };
} *lwp_siginfo_ext_t;

typedef struct lwp_siginfo {
    rt_list_t node;

    struct {
        int signo;
        int code;

        int from_tid;
        pid_t from_pid;
    } ksiginfo;

    /* the signal specified extension field */
    struct lwp_siginfo_ext *ext;
} *lwp_siginfo_t;

typedef struct lwp_sigqueue {
    rt_list_t siginfo_list;
    lwp_sigset_t sigset_pending;
} *lwp_sigqueue_t;

struct lwp_thread_signal {
    lwp_sigset_t sigset_mask;
    struct lwp_sigqueue sig_queue;
};

struct rt_user_context
{
    void *sp;
    void *pc;
    void *flag;

    void *ctx;
};
#endif /* RT_USING_SMART */

typedef void (*rt_thread_cleanup_t)(struct rt_thread *tid);

/**
 * Thread structure
 */

struct rt_thread
{
    struct rt_object            parent;

    /* stack point and entry */
    void                        *sp;                    /**< stack point */
    void                        *entry;                 /**< entry */
    void                        *parameter;             /**< parameter */
    void                        *stack_addr;            /**< stack address */
    rt_uint32_t                 stack_size;             /**< stack size */

    /* error code */
    rt_err_t                    error;                  /**< error code */

#ifdef RT_USING_SMP
    rt_atomic_t                 cpus_lock_nest;         /**< cpus lock count */
#endif

    RT_SCHED_THREAD_CTX
    struct rt_timer             thread_timer;           /**< built-in thread timer */
    rt_thread_cleanup_t         cleanup;                /**< cleanup function when thread exit */

#ifdef RT_USING_MUTEX
    /* object for IPC */
    rt_list_t                   taken_object_list;
    rt_object_t                 pending_object;
#endif /* RT_USING_MUTEX */

#ifdef RT_USING_EVENT
    /* thread event */
    rt_uint32_t                 event_set;
    rt_uint8_t                  event_info;
#endif /* RT_USING_EVENT */

#ifdef RT_USING_SIGNALS
    rt_sigset_t                 sig_pending;            /**< the pending signals */
    rt_sigset_t                 sig_mask;               /**< the mask bits of signal */

#ifndef RT_USING_SMP
    void                        *sig_ret;               /**< the return stack pointer from signal */
#endif /* RT_USING_SMP */
    rt_sighandler_t             *sig_vectors;           /**< vectors of signal handler */
    void                        *si_list;               /**< the signal infor list */
#endif /* RT_USING_SIGNALS */

#ifdef RT_USING_CPU_USAGE
    rt_uint64_t                 duration_tick;          /**< cpu usage tick */
#endif /* RT_USING_CPU_USAGE */

#ifdef RT_USING_PTHREADS
    void                        *pthread_data;          /**< the handle of pthread data, adapt 32/64bit */
#endif /* RT_USING_PTHREADS */

    /* light weight process if present */
#ifdef RT_USING_SMART
    void                        *msg_ret;               /**< the return msg */

    void                        *lwp;                   /**< the lwp reference */
    /* for user create */
    void                        *user_entry;
    void                        *user_stack;
    rt_uint32_t                 user_stack_size;
    rt_uint32_t                 *kernel_sp;             /**< kernel stack point */
    rt_list_t                   sibling;                /**< next thread of same process */

    struct lwp_thread_signal    signal;                 /**< lwp signal for user-space thread */
    struct rt_user_context      user_ctx;               /**< user space context */
    struct rt_wakeup            wakeup_handle;          /**< wakeup handle for IPC */
    rt_atomic_t                 exit_request;           /**< pending exit request of thread */
    int                         tid;                    /**< thread ID used by process */
    int                         tid_ref_count;          /**< reference of tid */
    void                        *susp_recycler;         /**< suspended recycler on this thread */
    void                        *robust_list;           /**< pi lock, very carefully, it's a userspace list!*/

#ifndef ARCH_MM_MMU
    lwp_sighandler_t            signal_handler[32];
#else
    int                         step_exec;
    int                         debug_attach_req;
    int                         debug_ret_user;
    int                         debug_suspend;
    struct rt_hw_exp_stack      *regs;
    void                        *thread_idr;            /** lwp thread indicator */
    int                         *clear_child_tid;
#endif /* ARCH_MM_MMU */
#endif /* RT_USING_SMART */

#ifdef RT_USING_CPU_USAGE_TRACER
    rt_ubase_t                  user_time;              /**< Ticks on user */
    rt_ubase_t                  system_time;            /**< Ticks on system */
#endif /* RT_USING_CPU_USAGE_TRACER */

#ifdef RT_USING_MEM_PROTECTION
    void *mem_regions;
#ifdef RT_USING_HW_STACK_GUARD
    void *stack_buf;
#endif /* RT_USING_HW_STACK_GUARD */
#endif /* RT_USING_MEM_PROTECTION */

    struct rt_spinlock          spinlock;
    rt_ubase_t                  user_data;              /**< private user data beyond this thread */
};
typedef struct rt_thread *rt_thread_t;

#ifdef RT_USING_SMART
#define LWP_IS_USER_MODE(t) ((t)->user_ctx.ctx == RT_NULL)
#else
#define LWP_IS_USER_MODE(t) (0)
#endif /* RT_USING_SMART */

/**@}*/

/**
 * @addtogroup IPC
 */

/**@{*/

/**
 * IPC flags and control command definitions
 */
#define RT_IPC_FLAG_FIFO                0x00            /**< FIFOed IPC. @ref IPC. */
#define RT_IPC_FLAG_PRIO                0x01            /**< PRIOed IPC. @ref IPC. */

#define RT_IPC_CMD_UNKNOWN              0x00            /**< unknown IPC command */
#define RT_IPC_CMD_RESET                0x01            /**< reset IPC object */
#define RT_IPC_CMD_GET_STATE            0x02            /**< get the state of IPC object */
#define RT_IPC_CMD_SET_VLIMIT           0x03            /**< set max limit value of IPC value */

#define RT_WAITING_FOREVER              -1              /**< Block forever until get resource. */
#define RT_WAITING_NO                   0               /**< Non-block. */

/**
 * Base structure of IPC object
 */
struct rt_ipc_object
{
    struct rt_object parent;                            /**< inherit from rt_object */

    rt_list_t suspend_thread;                 /**< threads pended on this resource */
};

/**
 * @addtogroup semaphore
 * @{
 */

#ifdef RT_USING_SEMAPHORE
/**
 * Semaphore structure
 */
struct rt_semaphore
{
    struct rt_ipc_object parent;                        /**< inherit from ipc_object */

    rt_uint16_t          value;                         /**< value of semaphore. */
    rt_uint16_t          max_value;
    struct rt_spinlock   spinlock;
};
typedef struct rt_semaphore *rt_sem_t;
#endif /* RT_USING_SEMAPHORE */

/**@}*/

/**
 * @addtogroup mutex
 * @{
 */

#ifdef RT_USING_MUTEX
/**
 * Mutual exclusion (mutex) structure
 */
struct rt_mutex
{
    struct rt_ipc_object parent;                        /**< inherit from ipc_object */

    rt_uint8_t           ceiling_priority;              /**< the priority ceiling of mutexe */
    rt_uint8_t           priority;                      /**< the maximal priority for pending thread */
    rt_uint8_t           hold;                          /**< numbers of thread hold the mutex */
    rt_uint8_t           reserved;                      /**< reserved field */

    struct rt_thread    *owner;                         /**< current owner of mutex */
    rt_list_t            taken_list;                    /**< the object list taken by thread */
    struct rt_spinlock   spinlock;
};
typedef struct rt_mutex *rt_mutex_t;
#endif /* RT_USING_MUTEX */

/**@}*/

/**
 * @addtogroup event
 * @{
 */

#ifdef RT_USING_EVENT
/**
 * flag definitions in event
 */
#define RT_EVENT_FLAG_AND               0x01            /**< logic and */
#define RT_EVENT_FLAG_OR                0x02            /**< logic or */
#define RT_EVENT_FLAG_CLEAR             0x04            /**< clear flag */

/*
 * event structure
 */
struct rt_event
{
    struct rt_ipc_object parent;                        /**< inherit from ipc_object */

    rt_uint32_t          set;                           /**< event set */
    struct rt_spinlock   spinlock;
};
typedef struct rt_event *rt_event_t;
#endif /* RT_USING_EVENT */

/**@}*/

/**
 * @addtogroup mailbox
 * @{
 */

#ifdef RT_USING_MAILBOX
/**
 * mailbox structure
 */
struct rt_mailbox
{
    struct rt_ipc_object parent;                        /**< inherit from ipc_object */

    rt_ubase_t          *msg_pool;                      /**< start address of message buffer */

    rt_uint16_t          size;                          /**< size of message pool */

    rt_uint16_t          entry;                         /**< index of messages in msg_pool */
    rt_uint16_t          in_offset;                     /**< input offset of the message buffer */
    rt_uint16_t          out_offset;                    /**< output offset of the message buffer */

    rt_list_t            suspend_sender_thread;         /**< sender thread suspended on this mailbox */
    struct rt_spinlock   spinlock;
};
typedef struct rt_mailbox *rt_mailbox_t;
#endif /* RT_USING_MAILBOX */

/**@}*/

/**
 * @addtogroup messagequeue
 * @{
 */

#ifdef RT_USING_MESSAGEQUEUE
/**
 * message queue structure
 */
struct rt_messagequeue
{
    struct rt_ipc_object parent;                        /**< inherit from ipc_object */

    void                *msg_pool;                      /**< start address of message queue */

    rt_uint16_t          msg_size;                      /**< message size of each message */
    rt_uint16_t          max_msgs;                      /**< max number of messages */

    rt_uint16_t          entry;                         /**< index of messages in the queue */

    void                *msg_queue_head;                /**< list head */
    void                *msg_queue_tail;                /**< list tail */
    void                *msg_queue_free;                /**< pointer indicated the free node of queue */

    rt_list_t            suspend_sender_thread;         /**< sender thread suspended on this message queue */
    struct rt_spinlock   spinlock;
};
typedef struct rt_messagequeue *rt_mq_t;
#endif /* RT_USING_MESSAGEQUEUE */

/**@}*/

/**@}*/

/**
 * @addtogroup MM
 */

/**@{*/

#ifdef RT_USING_HEAP
/*
 * memory structure
 */
struct rt_memory
{
    struct rt_object        parent;                 /**< inherit from rt_object */
    const char *            algorithm;              /**< Memory management algorithm name */
    rt_ubase_t              address;                /**< memory start address */
    rt_size_t               total;                  /**< memory size */
    rt_size_t               used;                   /**< size used */
    rt_size_t               max;                    /**< maximum usage */
};
typedef struct rt_memory *rt_mem_t;
#endif /* RT_USING_HEAP */

/*
 * memory management
 * heap & partition
 */

#ifdef RT_USING_SMALL_MEM
typedef rt_mem_t rt_smem_t;
#endif /* RT_USING_SMALL_MEM */

#ifdef RT_USING_SLAB
typedef rt_mem_t rt_slab_t;
#endif /* RT_USING_SLAB */

#ifdef RT_USING_MEMHEAP
/**
 * memory item on the heap
 */
struct rt_memheap_item
{
    rt_uint32_t             magic;                      /**< magic number for memheap */
    struct rt_memheap      *pool_ptr;                   /**< point of pool */

    struct rt_memheap_item *next;                       /**< next memheap item */
    struct rt_memheap_item *prev;                       /**< prev memheap item */

    struct rt_memheap_item *next_free;                  /**< next free memheap item */
    struct rt_memheap_item *prev_free;                  /**< prev free memheap item */
#ifdef RT_USING_MEMTRACE
    rt_uint8_t              owner_thread_name[4];       /**< owner thread name */
#endif /* RT_USING_MEMTRACE */
};

/**
 * Base structure of memory heap object
 */
struct rt_memheap
{
    struct rt_object        parent;                     /**< inherit from rt_object */

    void                   *start_addr;                 /**< pool start address and size */

    rt_size_t               pool_size;                  /**< pool size */
    rt_size_t               available_size;             /**< available size */
    rt_size_t               max_used_size;              /**< maximum allocated size */

    struct rt_memheap_item *block_list;                 /**< used block list */

    struct rt_memheap_item *free_list;                  /**< free block list */
    struct rt_memheap_item  free_header;                /**< free block list header */

    struct rt_semaphore     lock;                       /**< semaphore lock */
    rt_bool_t               locked;                     /**< External lock mark */
};
#endif /* RT_USING_MEMHEAP */

#ifdef RT_USING_MEMPOOL
/**
 * Base structure of Memory pool object
 */
struct rt_mempool
{
    struct rt_object    parent;                            /**< inherit from rt_object */

    void                *start_address;                     /**< memory pool start */
    rt_size_t           size;                              /**< size of memory pool */

    rt_size_t           block_size;                        /**< size of memory blocks */
    rt_uint8_t          *block_list;                        /**< memory blocks list */

    rt_size_t           block_total_count;                 /**< numbers of memory block */
    rt_size_t           block_free_count;                  /**< numbers of free memory block */

    rt_list_t           suspend_thread;                    /**< threads pended on this resource */
    struct rt_spinlock  spinlock;
};
typedef struct rt_mempool *rt_mp_t;
#endif /* RT_USING_MEMPOOL */

/**@}*/

#ifdef RT_USING_DEVICE
/**
 * @addtogroup Device
 */

/**@{*/

/**
 * device (I/O) class type
 */
enum rt_device_class_type
{
    RT_Device_Class_Char = 0,                           /**< character device */
    RT_Device_Class_Block,                              /**< block device */
    RT_Device_Class_NetIf,                              /**< net interface */
    RT_Device_Class_MTD,                                /**< memory device */
    RT_Device_Class_CAN,                                /**< CAN device */
    RT_Device_Class_RTC,                                /**< RTC device */
    RT_Device_Class_Sound,                              /**< Sound device */
    RT_Device_Class_Graphic,                            /**< Graphic device */
    RT_Device_Class_I2CBUS,                             /**< I2C bus device */
    RT_Device_Class_USBDevice,                          /**< USB slave device */
    RT_Device_Class_USBHost,                            /**< USB host bus */
    RT_Device_Class_USBOTG,                             /**< USB OTG bus */
    RT_Device_Class_SPIBUS,                             /**< SPI bus device */
    RT_Device_Class_SPIDevice,                          /**< SPI device */
    RT_Device_Class_SDIO,                               /**< SDIO bus device */
    RT_Device_Class_PM,                                 /**< PM pseudo device */
    RT_Device_Class_Pipe,                               /**< Pipe device */
    RT_Device_Class_Portal,                             /**< Portal device */
    RT_Device_Class_Timer,                              /**< Timer device */
    RT_Device_Class_Miscellaneous,                      /**< Miscellaneous device */
    RT_Device_Class_Sensor,                             /**< Sensor device */
    RT_Device_Class_Touch,                              /**< Touch device */
    RT_Device_Class_PHY,                                /**< PHY device */
    RT_Device_Class_Security,                           /**< Security device */
    RT_Device_Class_WLAN,                               /**< WLAN device */
    RT_Device_Class_Pin,                                /**< Pin device */
    RT_Device_Class_ADC,                                /**< ADC device */
    RT_Device_Class_DAC,                                /**< DAC device */
    RT_Device_Class_WDT,                                /**< WDT device */
    RT_Device_Class_PWM,                                /**< PWM device */
    RT_Device_Class_Bus,                                /**< Bus device */
    RT_Device_Class_Unknown                             /**< unknown device */
};

/**
 * device flags definitions
 */
#define RT_DEVICE_FLAG_DEACTIVATE       0x000           /**< device is not not initialized */

#define RT_DEVICE_FLAG_RDONLY           0x001           /**< read only */
#define RT_DEVICE_FLAG_WRONLY           0x002           /**< write only */
#define RT_DEVICE_FLAG_RDWR             0x003           /**< read and write */

#define RT_DEVICE_FLAG_REMOVABLE        0x004           /**< removable device */
#define RT_DEVICE_FLAG_STANDALONE       0x008           /**< standalone device */
#define RT_DEVICE_FLAG_ACTIVATED        0x010           /**< device is activated */
#define RT_DEVICE_FLAG_SUSPENDED        0x020           /**< device is suspended */
#define RT_DEVICE_FLAG_STREAM           0x040           /**< stream mode */
#define RT_DEVICE_FLAG_DYNAMIC          0x080           /**< device is determined when open() */

#define RT_DEVICE_FLAG_INT_RX           0x100           /**< INT mode on Rx */
#define RT_DEVICE_FLAG_DMA_RX           0x200           /**< DMA mode on Rx */
#define RT_DEVICE_FLAG_INT_TX           0x400           /**< INT mode on Tx */
#define RT_DEVICE_FLAG_DMA_TX           0x800           /**< DMA mode on Tx */

#define RT_DEVICE_OFLAG_CLOSE           0x000           /**< device is closed */
#define RT_DEVICE_OFLAG_RDONLY          0x001           /**< read only access */
#define RT_DEVICE_OFLAG_WRONLY          0x002           /**< write only access */
#define RT_DEVICE_OFLAG_RDWR            0x003           /**< read and write */
#define RT_DEVICE_OFLAG_OPEN            0x008           /**< device is opened */
#define RT_DEVICE_OFLAG_MASK            0xf0f           /**< mask of open flag */

/**
 * general device commands
 * 0x01 - 0x1F general device control commands
 * 0x20 - 0x3F udevice control commands
 * 0x40 -      special device control commands
 */
#define RT_DEVICE_CTRL_RESUME           0x01            /**< resume device */
#define RT_DEVICE_CTRL_SUSPEND          0x02            /**< suspend device */
#define RT_DEVICE_CTRL_CONFIG           0x03            /**< configure device */
#define RT_DEVICE_CTRL_CLOSE            0x04            /**< close device */
#define RT_DEVICE_CTRL_NOTIFY_SET       0x05            /**< set notify func */
#define RT_DEVICE_CTRL_SET_INT          0x06            /**< set interrupt */
#define RT_DEVICE_CTRL_CLR_INT          0x07            /**< clear interrupt */
#define RT_DEVICE_CTRL_GET_INT          0x08            /**< get interrupt status */
#define RT_DEVICE_CTRL_CONSOLE_OFLAG    0x09            /**< get console open flag */
#define RT_DEVICE_CTRL_MASK             0x1f            /**< mask for contrl commands */

/**
 * device control
 */
#define RT_DEVICE_CTRL_BASE(Type)        ((RT_Device_Class_##Type + 1) * 0x100)

typedef struct rt_driver *rt_driver_t;
typedef struct rt_device *rt_device_t;

#ifdef RT_USING_DEVICE_OPS
/**
 * operations set for device object
 */
struct rt_device_ops
{
    /* common device interface */
    rt_err_t  (*init)   (rt_device_t dev);
    rt_err_t  (*open)   (rt_device_t dev, rt_uint16_t oflag);
    rt_err_t  (*close)  (rt_device_t dev);
    rt_ssize_t (*read)  (rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
    rt_ssize_t (*write) (rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size);
    rt_err_t  (*control)(rt_device_t dev, int cmd, void *args);
};
#endif /* RT_USING_DEVICE_OPS */

/**
 * WaitQueue structure
 */
struct rt_wqueue
{
    rt_uint32_t flag;
    rt_list_t waiting_list;
    struct rt_spinlock spinlock;
};
typedef struct rt_wqueue rt_wqueue_t;

#ifdef RT_USING_DM
struct rt_driver;
struct rt_bus;
#endif /* RT_USING_DM */

/**
 * Device structure
 */
struct rt_device
{
    struct rt_object          parent;                   /**< inherit from rt_object */

#ifdef RT_USING_DM
    struct rt_bus *bus;                                 /**< the bus mounting to */
    rt_list_t node;                                     /**< to mount on bus */
    struct rt_driver *drv;                              /**< driver for powering the device */
#ifdef RT_USING_OFW
    void *ofw_node;                                     /**< ofw node get from device tree */
#endif /* RT_USING_OFW */
    void *power_domain_unit;
#endif /* RT_USING_DM */

    enum rt_device_class_type type;                     /**< device type */
    rt_uint16_t               flag;                     /**< device flag */
    rt_uint16_t               open_flag;                /**< device open flag */

    rt_uint8_t                ref_count;                /**< reference count */
    rt_uint8_t                device_id;                /**< 0 - 255 */

    /* device call back */
    rt_err_t (*rx_indicate)(rt_device_t dev, rt_size_t size);
    rt_err_t (*tx_complete)(rt_device_t dev, void *buffer);

#ifdef RT_USING_DEVICE_OPS
    const struct rt_device_ops *ops;
#else
    /* common device interface */
    rt_err_t  (*init)   (rt_device_t dev);
    rt_err_t  (*open)   (rt_device_t dev, rt_uint16_t oflag);
    rt_err_t  (*close)  (rt_device_t dev);
    rt_ssize_t (*read)  (rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
    rt_ssize_t (*write) (rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size);
    rt_err_t  (*control)(rt_device_t dev, int cmd, void *args);
#endif /* RT_USING_DEVICE_OPS */

#ifdef RT_USING_POSIX_DEVIO
    const struct dfs_file_ops *fops;
    struct rt_wqueue wait_queue;
#endif /* RT_USING_POSIX_DEVIO */

    rt_err_t (*readlink)
        (rt_device_t dev, char *buf, int len);          /**< for dynamic device */

    void                     *user_data;                /**< device private data */
};

/**
 * Notify structure
 */
struct rt_device_notify
{
    void (*notify)(rt_device_t dev);
    struct rt_device *dev;
};

#ifdef RT_USING_SMART
struct rt_channel
{
    struct rt_ipc_object parent;                        /**< inherit from object */
    struct rt_thread *reply;                            /**< the thread will be reply */
    struct rt_spinlock slock;                           /**< spinlock of this channel */
    rt_list_t wait_msg;                                 /**< the wait queue of sender msg */
    rt_list_t wait_thread;                              /**< the wait queue of sender thread */
    rt_wqueue_t reader_queue;                           /**< channel poll queue */
    rt_uint8_t  stat;                                   /**< the status of this channel */
    rt_ubase_t  ref;
};
typedef struct rt_channel *rt_channel_t;
#endif /* RT_USING_SMART */

/**@}*/
#endif /* RT_USING_DEVICE */

#ifdef __cplusplus
}
#endif

#ifdef __cplusplus
/* RT-Thread definitions for C++ */
namespace rtthread {

enum TICK_WAIT {
    WAIT_NONE = 0,
    WAIT_FOREVER = -1,
};

}

#endif /* __cplusplus */

#endif /* __RT_DEF_H__ */