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// File: Standard_ErrorHandlerCallback.cxx
// Created: Thu Apr 13 11:32:40 2006
// Author: Andrey BETENEV
// If either NO_CXX_EXCEPTION or OCC_CONVERT_SIGNALS is defined,
// provide complete implementation
#include <Standard_ErrorHandlerCallback.ixx>
#include <Standard_ErrorHandler.hxx>
#if defined(NO_CXX_EXCEPTION) || defined(OCC_CONVERT_SIGNALS)
Standard_ErrorHandlerCallback::Standard_ErrorHandlerCallback ()
: myHandler(0), myPrev(0), myNext(0)
{
}
Standard_ErrorHandlerCallback::~Standard_ErrorHandlerCallback ()
{
UnregisterCallback();
}
void Standard_ErrorHandlerCallback::RegisterCallback ()
{
if ( myHandler ) return; // already registered
// find current active exception handler
Standard_ErrorHandler *aHandler =
Standard_ErrorHandler::FindHandler(Standard_HandlerVoid, Standard_False);
// if found, add this callback object first to the list
if ( aHandler ) {
myHandler = aHandler;
myNext = aHandler->myCallbackPtr;
if ( myNext ) ((Standard_ErrorHandlerCallback*)myNext)->myPrev = this;
aHandler->myCallbackPtr = this;
}
}
void Standard_ErrorHandlerCallback::UnregisterCallback ()
{
if ( ! myHandler ) return;
if ( myNext )
((Standard_ErrorHandlerCallback*)myNext)->myPrev = myPrev;
if ( myPrev )
((Standard_ErrorHandlerCallback*)myPrev)->myNext = myNext;
else if ( ((Standard_ErrorHandler*)myHandler)->myCallbackPtr == this)
((Standard_ErrorHandler*)myHandler)->myCallbackPtr = myNext;
myHandler = myNext = myPrev = 0;
}
#endif
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