/*
* Fetch data from a mbox.Wait for at most timeout millisecs
* Return -1 if timed out otherwise time spent waiting.
*/
u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **data, u32_t timeout)
{
long addr=0L;
int end_time = 0, start_time = 0;
if (timeout) {
start_time = OS_GetTime();
if(OS_GetMailTimed (mbox, &addr,timeout)) {
*data = NULL;
return SYS_ARCH_TIMEOUT;
}
end_time = OS_GetTime();
} else {
OS_GetMail(mbox,&addr);
}
if(data) {
if (addr == (long)&dummy_msg)
*data = NULL;
else
*data=(void*)addr;
//printf("fetch mbox:0x%x = 0x%x\r\n",mbox,*data);
}else{
//printf("fetch mbox:0x%x\r\n",mbox);
}
return (end_time - start_time);
}
/*-----------------------------------------------------------------------------------
* Blocks the thread until a message arrives in the mailbox, but does
* not block the thread longer than "timeout" milliseconds (similar to
* the sys_arch_sem_wait() function). The "msg" argument is a result
* parameter that is set by the function (i.e., by doing "*msg =
* ptr"). The "msg" parameter maybe NULL to indicate that the message
* should be dropped.
*
* The return values are the same as for the sys_arch_sem_wait() function:
* Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
* timeout.
*
* Note that a function with a similar name, sys_mbox_fetch(), is
* implemented by lwIP.
*/
u32_t sys_arch_mbox_fetch(sys_mbox_t *mbox, /*@null@*/ /*@out@*/ void **msg, u32_t timeout)
{
void *dummyptr;
void ** tmp_ptr;
portTickType start_time, end_time, elapsed_time;
e_mailbox_t* embox = (e_mailbox_t*)(*mbox);
// assuming 1 tick is 1ms which is the case for now.
start_time = OS_GetTime32();
/* inherited this code from freeRTOS and LWIP must be calling it in this way..*/
if ( msg == NULL )
{
tmp_ptr = &dummyptr;
}
else
{
tmp_ptr = msg;
}
if ( timeout != 0 )
{
// Return values 0 means success,1 means timeout
if (0 == OS_GetMailTimed(&embox->mbox, tmp_ptr, timeout))
{
end_time = OS_GetTime32();
elapsed_time = end_time - start_time;
if ( elapsed_time == 0 )
{
elapsed_time = (portTickType) 1;
}
return ( elapsed_time );
}
else /* timed out blocking for message */
{
if ( msg != NULL )
{
*msg = NULL;
}
return SYS_ARCH_TIMEOUT;
}
}
else /* block forever for a message. */
{
OS_GetMail(&embox->mbox, &(*tmp_ptr));
end_time = OS_GetTime32();
elapsed_time = end_time - start_time;
if ( elapsed_time == 0 )
{
elapsed_time = (portTickType) 1;
}
return ( elapsed_time ); /* return time blocked TBD test */
}
}