13  * 2006-05-12     Bernard      implement mailbox and message queue
19  * 2006-06-07     Bernard      fix the message queue send bug
33  * 2011-12-18     Bernard      add more parameter checking in message queue
1538     /* increase message entry */  in rt_mb_send_wait()
1687     /* decrease message entry */  in rt_mb_recv()
1766  * This function will initialize a message queue and put it under control of
1769  * @param mq the message object
1770  * @param name the name of message queue
1772  * @param msg_size the maximum size of message
1774  * @param flag the flag of message queue
1803     /* get correct message size */  in rt_mq_init()
1807     /* init message list */  in rt_mq_init()
1811     /* init message empty list */  in rt_mq_init()
1829  * This function will detach a message queue object from resource management
1831  * @param mq the message queue object
1845     /* detach message queue object */  in rt_mq_detach()
1854  * This function will create a message queue object from system resource
1856  * @param name the name of message queue
1857  * @param msg_size the size of message
1858  * @param max_msgs the maximum number of message in queue
1859  * @param flag the flag of message queue
1861  * @return the created message queue, RT_NULL on error happen
1885     /* init message queue */  in rt_mq_create()
1887     /* get correct message size */  in rt_mq_create()
1891     /* allocate message pool */  in rt_mq_create()
1900     /* init message list */  in rt_mq_create()
1904     /* init message empty list */  in rt_mq_create()
1922  * This function will delete a message queue object and release the memory
1924  * @param mq the message queue object
1940     /* free message queue pool */  in rt_mq_delete()
1943     /* delete message queue object */  in rt_mq_delete()
1952  * This function will send a message to message queue object, if there are
1953  * threads suspended on message queue object, it will be waked up.
1955  * @param mq the message queue object
1956  * @param buffer the message
1972     /* greater than one message size */  in rt_mq_send()
1983     /* message queue is full */  in rt_mq_send()
2004     /* link msg to message queue */  in rt_mq_send()
2017     /* increase message entry */  in rt_mq_send()
2041  * This function will send an urgent message to message queue object, which
2042  * means the message will be inserted to the head of message queue. If there
2043  * are threads suspended on message queue object, it will be waked up.
2045  * @param mq the message queue object
2046  * @param buffer the message
2062     /* greater than one message size */  in rt_mq_urgent()
2073     /* message queue is full */  in rt_mq_urgent()
2093     /* link msg to the beginning of message queue */  in rt_mq_urgent()
2101     /* increase message entry */  in rt_mq_urgent()
2125  * This function will receive a message from message queue object, if there is
2126  * no message in message queue object, the thread shall wait for a specified
2129  * @param mq the message queue object
2130  * @param buffer the received message will be saved in
2169     /* message queue is empty */  in rt_mq_recv()
2215         /* recv message */  in rt_mq_recv()
2235     /* get message from queue */  in rt_mq_recv()
2238     /* move message queue head */  in rt_mq_recv()
2244     /* decrease message entry */  in rt_mq_recv()
2250     /* copy message */  in rt_mq_recv()
2255     /* put message to free list */  in rt_mq_recv()
2268  * This function can get or set some extra attributions of a message queue
2271  * @param mq the message queue object
2294         /* release all message in the queue */  in rt_mq_control()
2297             /* get message from queue */  in rt_mq_control()
2300             /* move message queue head */  in rt_mq_control()
2306             /* put message to free list */  in rt_mq_control()