Merge TinyOS 2.1.1 into master.

[tinyos-2.x.git] / tos / chips / rf230 / RandomCollisionLayerP.nc

diff --git a/tos/chips/rf230/RandomCollisionLayerP.nc b/tos/chips/rf230/RandomCollisionLayerP.nc
deleted file mode 100644 (file)
index c53d1b9..0000000
--- a/tos/chips/rf230/RandomCollisionLayerP.nc
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * Copyright (c) 2007, Vanderbilt University
- * All rights reserved.
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose, without fee, and without written agreement is
- * hereby granted, provided that the above copyright notice, the following
- * two paragraphs and the author appear in all copies of this software.
- * 
- * IN NO EVENT SHALL THE VANDERBILT UNIVERSITY BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
- * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE VANDERBILT
- * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
- * THE VANDERBILT UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE VANDERBILT UNIVERSITY HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Author: Miklos Maroti
- */
-
-#include <Tasklet.h>
-#include <RadioAssert.h>
-
-module RandomCollisionLayerP
-{
-       provides
-       {
-               interface RadioSend;
-               interface RadioReceive;
-       }
-       uses
-       {
-               interface RadioSend as SubSend;
-               interface RadioReceive as SubReceive;
-               interface RadioAlarm;
-               interface Random;
-               interface RandomCollisionConfig as Config;
-       }
-}
-
-implementation
-{
-       tasklet_norace uint8_t state;
-       enum
-       {
-               STATE_READY = 0,
-               STATE_TX_PENDING_FIRST = 1,
-               STATE_TX_PENDING_SECOND = 2,
-               STATE_TX_SENDING = 3,
-
-               STATE_BARRIER = 0x80,
-       };
-
-       tasklet_norace message_t *txMsg;
-       tasklet_norace uint16_t txBarrier;
-
-       tasklet_async event void SubSend.ready()
-       {
-               if( state == STATE_READY && call RadioAlarm.isFree() )
-                       signal RadioSend.ready();
-       }
-
-       uint16_t nextRandom;
-       task void calcNextRandom()
-       {
-               uint16_t a = call Random.rand16();
-               atomic nextRandom = a;
-       }
-
-       uint16_t getBackoff(uint16_t maxBackoff)
-       {
-               uint16_t a;
-
-               atomic
-               {
-                       a = nextRandom;
-                       nextRandom += 273;
-               }
-               post calcNextRandom();
-
-               return (a % maxBackoff) + call Config.getMinimumBackoff();
-       }
-
-       tasklet_async command error_t RadioSend.send(message_t* msg)
-       {
-               if( state != STATE_READY || ! call RadioAlarm.isFree() )
-                       return EBUSY;
-
-               txMsg = msg;
-               state = STATE_TX_PENDING_FIRST;
-               call RadioAlarm.wait(getBackoff(call Config.getInitialBackoff(msg)));
-
-               return SUCCESS;
-       }
-
-       tasklet_async event void RadioAlarm.fired()
-       {
-               error_t error;
-               int16_t delay;
-
-               ASSERT( state != STATE_READY );
-
-               delay = (int16_t)txBarrier - call RadioAlarm.getNow();
-
-               if( state == STATE_BARRIER )
-               {
-                       state = STATE_READY;
-
-                       signal RadioSend.ready();
-                       return;
-               }
-               else if( (state & STATE_BARRIER) && delay > 0 )
-                       error = EBUSY;
-               else
-                       error = call SubSend.send(txMsg);
-
-               if( error != SUCCESS )
-               {
-                       if( (state & ~STATE_BARRIER) == STATE_TX_PENDING_FIRST )
-                       {
-                               state = (state & STATE_BARRIER) | STATE_TX_PENDING_SECOND;
-                               call RadioAlarm.wait(getBackoff(call Config.getCongestionBackoff(txMsg)));
-                       }
-                       else
-                       {
-                               if( (state & STATE_BARRIER) && delay > 0 )
-                               {
-                                       state = STATE_BARRIER;
-                                       call RadioAlarm.wait(delay);
-                               }
-                               else
-                                       state = STATE_READY;
-
-                               signal RadioSend.sendDone(error);
-                       }
-               }
-               else
-                       state = STATE_TX_SENDING;
-       }
-
-       tasklet_async event void SubSend.sendDone(error_t error)
-       {
-               ASSERT( state == STATE_TX_SENDING );
-
-               state = STATE_READY;
-               signal RadioSend.sendDone(error);
-       }
-
-       tasklet_async event bool SubReceive.header(message_t* msg)
-       {
-               return signal RadioReceive.header(msg);
-       }
-
-       tasklet_async event message_t* SubReceive.receive(message_t* msg)
-       {
-               int16_t delay;
-
-               txBarrier = call Config.getTransmitBarrier(msg);
-               delay = txBarrier - call RadioAlarm.getNow();
-
-               if( delay > 0 )
-               {
-                       if( state == STATE_READY )
-                       {
-                               call RadioAlarm.wait(delay);
-                               state = STATE_BARRIER;
-                       }
-                       else
-                               state |= STATE_BARRIER;
-               }
-
-               return signal RadioReceive.receive(msg);
-       }
-}