windows/SystemInterpreter.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
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/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*****************************************************************************/
/* REXX Windows Support                                                      */
/*                                                                           */
/* Main Windows interpreter control.  This is the preferred location for     */
/* all platform dependent global variables.                                  */
/* The interpreter does not instantiate an instance of this                  */
/* class, so most variables and methods should be static.                    */
/*                                                                           */
/*                                                                           */
/*****************************************************************************/
 
#include "RexxCore.h"
#include "SystemInterpreter.hpp"
#include "Interpreter.hpp"
 
#include <stdlib.h>
 
ULONG SystemInterpreter::exceptionHostProcessId = 0;
HANDLE SystemInterpreter::exceptionHostProcess = NULL;
bool SystemInterpreter::exceptionConsole = false;
bool SystemInterpreter::explicitConsole = false;
int SystemInterpreter::signalCount = 0;
 
class InterpreterInstance;
 
 
HINSTANCE SystemInterpreter::moduleHandle = 0;      // handle to the interpeter DLL
 
void SystemInterpreter::processStartup(HINSTANCE mod)
{
    moduleHandle = mod;
    // startup timeslice processing
    startTimeSlice();
    // now do the platform independent startup
    Interpreter::processStartup();
}
 
 
void SystemInterpreter::processShutdown()
{
    stopTimeSlice();              // shutdown the timer thread
    // now do the platform independent shutdown
    Interpreter::processShutdown();
}
 
 
void SystemInterpreter::startInterpreter()
{
}
 
 
void SystemInterpreter::terminateInterpreter()
{
}
 
 
 
void SystemInterpreter::live(size_t liveMark)
{
}
 
void SystemInterpreter::liveGeneral(int reason)
{
  if (!memoryObject.savingImage())
  {
  }
}
 
 
/**
 * Load a message from the system message resources.
 *
 * @param code   The error message identifier.
 * @param buffer The buffer for the returned message.
 * @param bufferLength
 *               The length of th message buffer.
 *
 * @return The success/failure indicator.
 */
bool SystemInterpreter::loadMessage(wholenumber_t code, char *buffer, size_t bufferLength)
{
    return LoadString(moduleHandle, (UINT)code, buffer, (int)bufferLength) != 0;
}
 
/**
 * Process a signal based on current command handler settings.
 *
 * @param dwCtrlType The type of exception.
 *
 * @return true if we handled the signal, false if it should be
 *         passed up the handler chain.
 */
bool SystemInterpreter::processSignal(DWORD dwCtrlType)
{
    /* Ignore Ctrl+C if console is running in console */
    if (exceptionConsole)
    {
        GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, exceptionHostProcessId);
        return true;   /* ignore signal */
    }
 
    if (exceptionHostProcess)
    {
        GenerateConsoleCtrlEvent(CTRL_C_EVENT, exceptionHostProcessId);
        TerminateProcess(exceptionHostProcess, -1);
    }
    // if this is a ctrl_C, try to halt all of the activities.  If we hit this
    // in a situation where we still have one pending, then we'll allow the system
    // to kill the process.
    if (dwCtrlType == CTRL_C_EVENT)
    {
        return Interpreter::haltAllActivities(OREF_NULL);
    }
    return true;      /* ignore signal */
}