GuardInstruction.hpp

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/******************************************************************************/
/* REXX Kernel                                           GuardInstruction.hpp */
/*                                                                            */
/* Primitive GUARD instruction Class Definitions                              */
/*                                                                            */
/******************************************************************************/
#ifndef Included_RexxInstructionGuard
#define Included_RexxInstructionGuard
 
#include "RexxInstruction.hpp"
 
#define guard_on_form 0x01             /* guard ON instruction              */
 
class RexxInstructionGuard : public RexxInstruction {
 public:
 
  inline void *operator new(size_t size, void *ptr) {return ptr;}
  inline void operator delete(void *) { }
  inline void operator delete(void *, void *) { }
 
  RexxInstructionGuard(RexxObject*, RexxArray *, bool);
  inline RexxInstructionGuard(RESTORETYPE restoreType) { ; };
  void live(size_t);
  void liveGeneral(int reason);
  void flatten(RexxEnvelope*);
  void execute(RexxActivation *, RexxExpressionStack *);
 
  RexxObject       *expression;        /* guard expression                  */
  size_t            variableCount;     // number of guard variables
  RexxVariableBase *variables[1];      /* set of guard variables            */
};
#endif