ExpressionStack.cpp

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/******************************************************************************/
/* REXX Kernel                                                                */
/*                                                                            */
/* Primitive Expression Stack Class                                           */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "StringClass.hpp"
#include "ExpressionStack.hpp"
#include "ActivityManager.hpp"
#include "ProtectedObject.hpp"
 
 
void RexxExpressionStack::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 RexxExpressionStack::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
   RexxObject **entry;                 /* marked stack entry                */
 
   for (entry = this->stack; entry <= this->top; entry++)
   {
       memory_mark_general(*entry);      /* marking each one                  */
   }
}
 
void RexxExpressionStack::flatten(RexxEnvelope * envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
    setUpFlatten(RexxExpressionStack)
 
    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
}
 
void RexxExpressionStack::migrate(RexxActivity *activity)
/******************************************************************************/
/* Function:  Migrate the expression stack to a new activity                  */
/******************************************************************************/
{
    RexxObject **oldFrame = stack;
    /* allocate a new frame */
    activity->allocateStackFrame(this, size);
    /* copy the enties over to the new stack. */
    memcpy(stack, oldFrame, sizeof(RexxObject *) * size);
}