消息队列结构体

📚 本节导读

用途：消息队列控制块结构

来源：kernel/include/os_dummy.h:198

一、结构体定义

struct dummy_msgqueue
{
    void           *msg_pool_dummy;       /* Point to message pool */
    dummy_mq_msg_t *msg_queue_head_dummy; /* Point to first entry of message queue */
    dummy_mq_msg_t *msg_queue_tail_dummy; /* Point to last entry of message queue */
    dummy_mq_msg_t *msg_queue_free_dummy; /* Point to first entry of free message resource */

    os_list_node_t send_task_list_head_dummy; /* Sender tasks blocked on this messages queue */
    os_list_node_t recv_task_list_head_dummy; /* Receiver tasks blocked on this messages queue */

    os_list_node_t resource_node_dummy; /* Node in resource list */

    os_size_t max_msg_size_dummy; /* Max message size of each message */
    uint16_t  queue_depth_dummy;  /* Maximum number of messages that can be put into message queue */
    uint16_t  used_msgs_dummy;    /* Number of messages queued */

    uint8_t object_inited_dummy;     /* Indicates whether object is inited or deinited, value is
                                      OS_KOBJ_INITED or OS_KOBJ_DEINITED */
    uint8_t object_alloc_type_dummy; /* Indicates whether object is allocated dynamically or statically,
                                      value is OS_ALLOC_TYPE_STATIC or OS_KOBJ_ALLOC_TYPE_DYNAMIC */
    uint8_t wake_type_dummy;         /* The type to wake up blocking tasks, value is OS_MQ_WAKE_TYPE_PRIO
                                      or OS_MQ_WAKE_TYPE_FIFO */

    char name_dummy[OS_NAME_MAX + 1]; /* Message queue name */

    os_spinlock_t lock_dummy; /* Spin lock used under SMP */
};
typedef struct dummy_msgqueue dummy_msgqueue_t;

二、消息节点结构体

struct dummy_mq_msg
{
    struct dummy_mq_msg *next_dummy;    /* Point to the next message */
    os_size_t            msg_len_dummy; /* message size */
};
typedef struct dummy_mq_msg dummy_mq_msg_t;
typedef struct dummy_mq_msg dummy_mq_msg_hdr_t;