dynamicthread.nc

tinyos-2.x.rar

/*
 * Copyright (c) 2008 Stanford University.
 * 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
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 *   distribution.
 * - Neither the name of the Stanford University 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 STANFORD
 * UNIVERSITY 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,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/**
 * @author Kevin Klues <[e-mail]>
 */

interface DynamicThread {
  /**
   *  create()
   * 
   *  This function creates a new tosthread.  
   *  
   *  @param 	t 				A pointer to a unique handler associated with the thread being created
   *  @param 	start_routine	The function called when the created thread starts running
   *  @param 	arg				The parameter passed to the start_routine for the created thread
   *  @param 	stack_size		The maximum stack size for this thread
   *  @return					An error code indicating whether the thread could be created or not
   *								SUCCESS		-	The thread has been created
   *							  	FAIL		- 	The thread could not be created
   *								EALREADY	-	The thread identifier is already associated with a
   *												currently active thread
   */
  command error_t create(tosthread_t* t, void (*start_routine)(void*), void* arg, uint16_t stack_size);

  /**
   *  destroy()
   *
   *  This function destroys a tosthread.  
   *  
   *  @param t 				A pointer to a thread identifier
   *  @return				An error code indicating whether the thread could be destroyed or not
   *							SUCCESS		-	The thread has been destroyed
   *					  		FAIL		- 	The thread could not be destroyed
   *							EBUSY		-	The thread holds mutexes so cannot be destroyed
   *											at the moment
   */
  command error_t destroy(tosthread_t* t);

  /**
   *  tosthread_pause() 
   *
   *  This function pauses a tosthread.  
   *  
   *  @param t 				A pointer to a thread identifier
   *  @return				An error code indicating whether the thread could be paused or not
   *							SUCCESS		-	The thread has been paused
   *						  	FAIL		- 	The thread could not be paused
   *							EBUSY		-	The thread holds mutexes so cannot be paused
   *											at the moment
   */
  command error_t pause(tosthread_t* t);

  /**
   *  resume()
   *
   *  This function resumes a previously paused tosthread.  
   *  
   *  @param t 				A pointer to a thread identifier
   *  @return				An error code indicating whether the thread could be resumed or not
   *							SUCCESS		-	The thread has been resumed
   *						  	FAIL		- 	The thread could not be resumed
   */
  command error_t resume(tosthread_t* t);

  /**
   *  sleep()
   *
   *  This function puts the currently running thread to sleep.  
   *  
   *  @param milli 			The number of milliseconds to sleep for
   *  @return				An error code indicating whether the thread could be put to sleep or not
   *							SUCCESS		-	The thread has been put to sleep
   *						  	FAIL		- 	The thread could not be put to sleep
   */
  command error_t sleep(uint32_t milli);
  
  /**
   *  join(tosthread_t* t)
   *
   *  This function bocks until the thread passed as a parameter has completed
   *  
   *  @param id 			The handle to the thread to block on
   *  @return				An error code indicating whether the thread could be waited on or not
   *							SUCCESS		-	The thread has been waited on and is now completed
   *							EALREADY	-	The thread we are trying to wait on has already completed
   *						  	FAIL		- 	The thread could not waited on
   */
  command error_t join(tosthread_t* id);
}