Merge pull request #297 from hduffddybz/master
add some comments of lwip porting
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commit
29437da109
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@ -29,6 +29,11 @@
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#include <string.h>
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/*
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* Initialize the network interface device
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*
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* @return the operation status, ERR_OK on OK, ERR_IF on error
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*/
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static err_t netif_device_init(struct netif *netif)
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{
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struct eth_device *ethif;
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@ -53,7 +58,9 @@ static err_t netif_device_init(struct netif *netif)
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return ERR_IF;
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}
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/*
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* Initialize the ethernetif layer and set network interface device up
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*/
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static void tcpip_init_done_callback(void *arg)
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{
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rt_device_t device;
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@ -182,6 +189,11 @@ void lwip_sys_init(void)
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lwip_system_init();
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}
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/*
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* Create a new semaphore
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*
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* @return the operation status, ERR_OK on OK; others on error
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*/
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err_t sys_sem_new(sys_sem_t *sem, u8_t count)
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{
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static unsigned short counter = 0;
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@ -204,17 +216,31 @@ err_t sys_sem_new(sys_sem_t *sem, u8_t count)
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}
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}
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/*
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* Deallocate a semaphore
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*/
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void sys_sem_free(sys_sem_t *sem)
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{
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RT_DEBUG_NOT_IN_INTERRUPT;
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rt_sem_delete(*sem);
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}
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/*
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* Signal a semaphore
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*/
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void sys_sem_signal(sys_sem_t *sem)
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{
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rt_sem_release(*sem);
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}
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/*
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* Block the thread while waiting for the semaphore to be signaled
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*
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* @return If the timeout argument is non-zero, it will return the number of milliseconds
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* spent waiting for the semaphore to be signaled; If the semaphore isn't signaled
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* within the specified time, it will return SYS_ARCH_TIMEOUT; If the thread doesn't
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* wait for the semaphore, it will return zero
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*/
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u32_t sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout)
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{
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rt_err_t ret;
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@ -354,6 +380,11 @@ void sys_mutex_set_invalid(sys_mutex_t *mutex)
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/* ====================== Mailbox ====================== */
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/*
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* Create an empty mailbox for maximum "size" elements
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*
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* @return the operation status, ERR_OK on OK; others on error
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*/
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err_t sys_mbox_new(sys_mbox_t *mbox, int size)
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{
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static unsigned short counter = 0;
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@ -376,6 +407,9 @@ err_t sys_mbox_new(sys_mbox_t *mbox, int size)
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return ERR_MEM;
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}
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/*
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* Deallocate a mailbox
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*/
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void sys_mbox_free(sys_mbox_t *mbox)
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{
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RT_DEBUG_NOT_IN_INTERRUPT;
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@ -399,6 +433,11 @@ void sys_mbox_post(sys_mbox_t *mbox, void *msg)
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return;
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}
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/*
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* Try to post the "msg" to the mailbox
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*
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* @return return ERR_OK if the "msg" is posted, ERR_MEM if the mailbox is full
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*/
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err_t sys_mbox_trypost(sys_mbox_t *mbox, void *msg)
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{
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if (rt_mb_send(*mbox, (rt_uint32_t)msg) == RT_EOK)
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@ -502,6 +541,11 @@ void sys_mbox_set_invalid(sys_mbox_t *mbox)
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/* ====================== System ====================== */
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/*
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* Start a new thread named "name" with priority "prio" that will begin
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* its execution in the function "thread()". The "arg" argument will be
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* passed as an argument to the thread() function
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*/
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sys_thread_t sys_thread_new(const char *name,
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lwip_thread_fn thread,
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void *arg,
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