Hi There
In my stressing test, I also found another problem, which is the event
ReceiveBytePacket.endPacket(error_t result) in SerialDispatcherP.nc component
async event void ReceiveBytePacket.endPacket(error_t result) {
uint8_t postsignalreceive = FALSE;
atomic {
if (!receiveTaskPending && result == SUCCESS) {
/***** I evict the concrete code here *****/
}
}
if (postsignalreceive){
post receiveTask();
}
}
Generally, this event is signaled once the transmission of byte stream
on the receive
path is finished. If the condition flags within the atomic section are
fulfilled, then
everything is fine...
However, if these flags can't be met, based on current design, there
is no further
handling. Note that the current buffer is still locked, and there is
no buffer swapping
either. In other words, if new byte stream comes in, then it will
still try to enter this
locked buffer, resulting in the deadlock.
Is my analysis correct? Thanks a lot for your clarification!
Regards
Peng
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