RexxInternalStack.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
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/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Kernel                                         RexxInternalStack.c    */
/*                                                                            */
/* Primitive Internal Use Stack Class                                         */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "StringClass.hpp"
#include "RexxInternalStack.hpp"
 
void RexxInternalStack::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
   RexxObject **entry;                 /* marked stack entry                */
 
                                       /* loop through the stack entries    */
   for (entry = this->stack; entry <= this->top; entry++)
   {
       memory_mark(*entry);              /* marking each one                  */
   }
}
 
void RexxInternalStack::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
   RexxObject **entry;                 /* marked stack entry                */
 
                                       /* loop through the stack entries    */
   for (entry = this->stack; entry <= this->top; entry++)
   {
       memory_mark_general(*entry);      /* marking each one                  */
   }
}
 
void RexxInternalStack::flatten(RexxEnvelope * envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
  setUpFlatten(RexxInternalStack)
 
  size_t i;                            /* pointer for scanning stack entries*/
  size_t count;                        /* number of elements                */
 
  count = this->top - this->stack;     /* get the total count               */
                                       /* loop through the stack entries    */
   for (i = 0; i < count; i++)
   {
       flatten_reference(newThis->stack[i], envelope);
   }
  cleanUpFlatten
}
 
RexxInternalStack *RexxInternalStack::newInstance(
    size_t stackSize)                 /* stack size                        */
/******************************************************************************/
/* Function:  Create a new expression stack                                   */
/******************************************************************************/
{
  RexxInternalStack* newObj;          /* newly create stack                */
 
                                       /* Get new object                    */
  newObj = (RexxInternalStack *)new_object(sizeof(RexxInternalStack) + (stackSize * sizeof(RexxObject *)), T_InternalStack);
  newObj->size = stackSize;            /* set the size                      */
  newObj->top  = newObj->stack;        /* set the top element               */
                                       /* set marker for "end of object" to */
                                       /* protect against stack overflow    */
  newObj->stack[0] = OREF_NULL;        /* clear out the first element       */
  return newObj;                       /* return the new stack item         */
}