On Apr 12, 2007, at 7:25 PM, Mehedi Bakht wrote:
Hi,
I am a bit confused about why and how the interface Pool should be
used when using the interface Queue (TinyOS 2.x). Any comment/
explanation will be really appreciated.
The two are completely separate. It just happens to be that some use
cases require that you use both of them.
A Queue gives you a fixed-length queue of type <t>. For example, a
transmission queue is a Queue<message_t*>, that is, a queue of
pointers to message buffers. You would instantiate it an 8-deep send
queue as a QueueC(message_t*, 8).
A Pool is a fixed-size memory pool of type <t>. For example, a pool
of message buffers is a Pool<message_t>, and you instantiate it with
PoolC(message_t, 8).
It happens to be that packet forwarding layers need both of them:
when you receive a packet, you need to allocate one to give back to
the radio layer, and you also need to put the received packet into
the send queue.
Phil
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