/*									tab:4 * * * "Copyright (c) 2000-2002 The Regents of the University  of California.   * 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 UNIVERSITY OF CALIFORNIA 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 UNIVERSITY OF * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * THE UNIVERSITY OF CALIFORNIA 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 UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS." * *//*									tab:4 *  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.  By *  downloading, copying, installing or using the software you agree to *  this license.  If you do not agree to this license, do not download, *  install, copy or use the software. * *  Intel Open Source License  * *  Copyright (c) 2002 Intel Corporation  *  All rights reserved.  *  Redistribution and use in source and binary forms, with or without *  modification, are permitted provided that the following conditions are *  met: *  *	Redistributions of source code must retain the above copyright *  notice, this list of conditions and the following disclaimer. *	Redistributions in binary form must reproduce the above copyright *  notice, this list of conditions and the following disclaimer in the *  documentation and/or other materials provided with the distribution. *      Neither the name of the Intel Corporation nor the names of its *  contributors may be used to endorse or promote products derived from *  this software without specific prior written permission. *   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *  PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE INTEL OR ITS *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  *  *//* * Authors:   Philip Levis * History:   July 19, 2002 *	      * *//** * @author Philip Levis */includes Bombilla;module BSynch {  provides interface BombillaSynch as Synch;  uses {    interface BombillaError;    interface BombillaLocks as Locks;  }}implementation {	  command bool Synch.isRunnable(BombillaContext* context, 				BombillaLock* locks) {    int8_t i;    uint16_t neededLocks = (context->acquireSet);    dbg(DBG_USR2, "VM: Checking whether context %i runnable: ", (int)context->which);    for (i = 0; i < BOMB_HEAPSIZE; i++) {      if (neededLocks & (1 << i)) {	if (call Locks.isLocked(locks, i)) {	  dbg_clear(DBG_USR2, "no\n");	  return FALSE;	}      }    }    dbg_clear(DBG_USR2, "yes\n");    return TRUE;  }  command result_t Synch.obtainLocks(BombillaContext* caller, 				     BombillaContext* obtainer, 				     BombillaLock* locks) {    int8_t i;    uint16_t neededLocks = (obtainer->acquireSet);    dbg(DBG_USR2, "VM: Attempting to obtain necessary locks for context %i.\n", obtainer->which);    for (i = 0; i < BOMB_HEAPSIZE; i++) {      if (neededLocks & (1 << i)) {	call Locks.lock(obtainer, locks, i);      }    }    obtainer->acquireSet = 0;    return SUCCESS;		  }  command result_t Synch.releaseLocks(BombillaContext* caller, 				      BombillaContext* releaser, 				      BombillaLock* locks) {    int8_t i;    uint16_t lockSet = (releaser->releaseSet);    dbg(DBG_USR2, "VM: Attempting to release specified locks for context %i.\n", releaser->which);    for (i = 0; i < BOMB_HEAPSIZE; i++) {      if (lockSet & (1 << i)) {	call Locks.unlock(releaser, locks, i);      }    }    releaser->releaseSet = 0;    return SUCCESS;		  }  command result_t Synch.releaseAllLocks(BombillaContext* caller,					 BombillaContext* releaser, 					 BombillaLock* locks) {    int8_t i;    uint16_t lockSet = (releaser->heldSet);    dbg(DBG_USR2, "VM: Attempting to release all locks for context %i.\n", releaser->which);    for (i = 0; i < BOMB_HEAPSIZE; i++) {      if (lockSet & (1 << i)) {	call Locks.unlock(releaser, locks, i);      }    }    releaser->releaseSet = 0;    return SUCCESS;  }}