stack.cc

MPICH是MPI的重要研究,提供了一系列的接口函数,为并行计算的实现提供了编程环境.

// Copyright 1997-2000, University of Notre Dame.
// Authors: Jeremy G. Siek, Jeffery M. Squyres, Michael P. McNally, and
//          Andrew Lumsdaine
// 
// This file is part of the Notre Dame C++ bindings for MPI.
// 
// You should have received a copy of the License Agreement for the Notre
// Dame C++ bindings for MPI along with the software; see the file
// LICENSE.  If not, contact Office of Research, University of Notre
// Dame, Notre Dame, IN 46556.
// 
// Permission to modify the code and to distribute modified code is
// granted, provided the text of this NOTICE is retained, a notice that
// the code was modified is included with the above COPYRIGHT NOTICE and
// with the COPYRIGHT NOTICE in the LICENSE file, and that the LICENSE
// file is distributed with the modified code.
// 
// LICENSOR MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.
// By way of example, but not limitation, Licensor MAKES NO
// REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY
// PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE COMPONENTS
// OR DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, TRADEMARKS
// OR OTHER RIGHTS.
// 
// Additional copyrights may follow.

#include "mpi2c++_test.h"


//
// Primitive stack implementation
//

struct Stack {
  const char *msg;
  Stack *prev;
  Stack *next;
};
  

//
// Global vars for below
//

static Stack *root= 0;


//
// Push
//
void
Push(const char *msg)
{
  if (msg == 0)
    return;

  Stack *cur = new Stack;
  cur -> msg = msg;
  cur -> next = 0;
  cur -> prev = root;

  root= cur;
}


//
// Pop
//
const char *
Pop()
{
  Stack *cur = root;
  const char *msg = 0;

  if (root != 0) {
    msg = root -> msg;
    root = root -> prev;
    delete cur;
  }

  return msg;
}