/*---------------------------------------------------------------------------*
* Routine: sys_arch_mbox_fetch
*---------------------------------------------------------------------------*
* Description:
* 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.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void **msg -- Pointer to pointer to msg received
* u32_t timeout -- Number of milliseconds until timeout
* Outputs:
* u32_t -- SYS_ARCH_TIMEOUT if timeout, else number
* of milliseconds until received.
*---------------------------------------------------------------------------*/
u32_t sys_arch_mbox_fetch( sys_mbox_t *pxMailBox, void **ppvBuffer, u32_t ulTimeOut ) {
void *pvDummy;
BT_TICK ulStartTime, ulEndTime, ulElapsed;
BT_u32 ulReturn;
ulStartTime = BT_GetKernelTick();
if( NULL == ppvBuffer ) {
ppvBuffer = &pvDummy;
}
if( ulTimeOut != 0UL ) {
if( BT_TRUE == BT_QueueReceive( *pxMailBox, &( *ppvBuffer ), ulTimeOut ) ) {
ulEndTime = BT_GetKernelTick();
ulElapsed = ( ulEndTime - ulStartTime );
ulReturn = ulElapsed;
}
else {
/* Timed out. */
*ppvBuffer = NULL;
ulReturn = SYS_ARCH_TIMEOUT;
}
}
else {
while( BT_TRUE != BT_QueueReceive( *pxMailBox, &( *ppvBuffer ), 0 ) );
ulEndTime = BT_GetKernelTick();
ulElapsed = ( ulEndTime - ulStartTime );
if( ulElapsed == 0UL ) {
ulElapsed = 1UL;
}
ulReturn = ulElapsed;
}
return ulReturn;
}
/*---------------------------------------------------------------------------*
* Routine: sys_arch_mbox_tryfetch
*---------------------------------------------------------------------------*
* Description:
* Similar to sys_arch_mbox_fetch, but if message is not ready
* immediately, we'll return with SYS_MBOX_EMPTY. On success, 0 is
* returned.
* Inputs:
* sys_mbox_t mbox -- Handle of mailbox
* void **msg -- Pointer to pointer to msg received
* Outputs:
* u32_t -- SYS_MBOX_EMPTY if no messages. Otherwise,
* return ERR_OK.
*---------------------------------------------------------------------------*/
u32_t sys_arch_mbox_tryfetch( sys_mbox_t *pxMailBox, void **ppvBuffer ) {
void *pvDummy;
unsigned long ulReturn;
long lResult;
if( ppvBuffer== NULL ) {
ppvBuffer = &pvDummy;
}
lResult = BT_QueueReceive( *pxMailBox, &( *ppvBuffer ), 0UL );
if( lResult == BT_TRUE ) {
ulReturn = ERR_OK;
}
else {
ulReturn = SYS_MBOX_EMPTY;
}
return ulReturn;
}
BT_s32 BT_FifoRead(BT_HANDLE hFifo, BT_u32 ulElements, void *pData, BT_u32 ulFlags) {
BT_ERROR Error = BT_ERR_NONE;
BT_u8 *pSrc = pData;
BT_u32 ulRead = 0;
if(!isFifoHandle(hFifo)) {
return BT_ERR_INVALID_HANDLE_TYPE;
}
for(ulRead = 0; ulRead < ulElements; ulRead++) {
if(BT_FifoIsEmpty(hFifo, &Error)) {
if (ulFlags & BT_FIFO_NONBLOCKING) {
break;
}
}
BT_QueueReceive(hFifo->hQueue, pData, BT_INFINITE_TIMEOUT);
pSrc += hFifo->ulElementWidth;
}
return ulRead;
}
