ExitHandler.hpp

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/******************************************************************************/
/* REXX Kernel                                                                */
/*                                                                            */
/* Manage a created instance of the interpreter                               */
/*                                                                            */
/******************************************************************************/
#ifndef Included_ExitHandler_hpp
#define Included_ExitHandler_hpp
 
#include "RexxCore.h"
#include "CallbackDispatcher.hpp"
 
class RexxActivity;
 
class ExitHandler
{
public:
    inline ExitHandler() : entryPoint(NULL) { type = UNRESOLVED; }
    void setEntryPoint(REXXPFN e) { entryPoint = e; }
    inline bool isEnabled()
    {
        return entryPoint != NULL;
    }
 
    inline void disable()
    {
        entryPoint = NULL;
    }
 
    int call(RexxActivity *activity, RexxActivation *activation, int major, int minor, void *parms);
    inline ExitHandler & operator= (ExitHandler &o)
    {
        entryPoint = o.entryPoint;
        type = o.type;
        return *this;
    }
 
    void resolve(const char *name);
    void resolve(RexxContextExitHandler *handler);
 
protected:
 
    typedef enum {
        UNRESOLVED,
        REGISTERED_NAME,
        DIRECT
    } ExitType;
 
 
    REXXPFN    entryPoint;             // resolved exit entry point
    ExitType   type;                   // the type of call
};
 
 
class ExitHandlerDispatcher : public CallbackDispatcher
{
public:
    inline ExitHandlerDispatcher(REXXPFN e, int code, int subcode, void *a) { entryPoint = e; major = code; minor = subcode; parms = a; }
    virtual ~ExitHandlerDispatcher() { ; }
 
    virtual void run();
 
    int        rc;                        // handler return code
    int        major;                     // major exit code
    int        minor;                     // minor exit code
    REXXPFN    entryPoint;                // resolved exit entry point
    void      *parms;                     // opaque arguments passed to callback handler
};
 
 
class ContextExitHandlerDispatcher : public ExitHandlerDispatcher
{
public:
    inline ContextExitHandlerDispatcher(REXXPFN e, int code, int subcode, void *a) : ExitHandlerDispatcher(e, code, subcode, a) { }
    virtual ~ContextExitHandlerDispatcher() { ; }
 
    virtual void run();
};
 
#endif