fiber.cpp

The Spectral Toolkit is a C++ spectral transform library written by Rodney James and Chuck Panaccion

//
// spectral toolkit 
// copyright (c) 2005 university corporation for atmospheric research
// licensed under the gnu general public license
//

#include "fiber.h"

namespace spectral
{
  /// Fiber destructor.

  fiber::~fiber() {}
  
  /// Fiber constructor.  Initializes thread attributes.

  fiber::fiber()
  {
    running=0;
    pthread_attr_init(&attr);
    pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_JOINABLE);
    pthread_attr_setscope(&attr,PTHREAD_SCOPE_SYSTEM);
  }
  
  /// Thread creation method.  Starts thread associated with this object
  /// which in turn invokes the virtual start method.
  /// \return 0 for success, pthread_create error code otherwise

  int fiber::spawn()
  {
    int r=pthread_create(&tid,&attr,fiber_wrapper,this);
    if(r==0)
      running=1;
    return(r); 
  }

  /// Thread join method.  Blocks until thread function returns if the thread 
  /// is running, otherwise returns immediately.
  /// \return pointer returned from pthread_join
  
  void* fiber::join()
  {
    void *status=0;
    if(running)
      pthread_join(tid,&status);
    return(status);
  }
}
  
void* fiber_wrapper(void *object)
{
  spectral::fiber *F=(spectral::fiber*)object;
  F->start();
  return(0);
}