Open CASCADE Technology
6.5.4
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Defines a base class for callback objects that can be registered
in the OCC error handler (the class simulating C++ exceptions)
so as to be correctly destroyed when error handler is activated.
Note that this is needed only when Open CASCADE is compiled with
NO_CXX_EXCEPTION or OCC_CONVERT_SIGNALS options (i.e. on UNIX/Linux).
In that case, raising OCC exception and/or signal will not cause
C++ stack unwinding and destruction of objects created in the stack.
This class is intended to protect critical objects and operations in
the try {} catch {} block from being bypassed by OCC signal or exception.
Inherit your object from that class, implement DestroyCallback() function,
and call Register/Unregister in critical points.
Note that you must ensure that your object has life span longer than
that of the try {} block in which it calls Register().
#include <Standard_ErrorHandlerCallback.hxx>
Public Member Functions | |
DEFINE_STANDARD_ALLOC void | RegisterCallback () |
Registers this callback object in the current error handler (if found). | |
void | UnregisterCallback () |
Unregisters this callback object from the error handler. | |
virtual | ~Standard_ErrorHandlerCallback () |
virtual void | DestroyCallback ()=0 |
The callback function to perform necessary callback action. Called by the exception handler when it is being destroyed but still has this callback registered. | |
Protected Member Functions | |
Standard_ErrorHandlerCallback () | |
Empty constructor |
virtual Standard_ErrorHandlerCallback::~Standard_ErrorHandlerCallback | ( | ) | [virtual] |
Standard_ErrorHandlerCallback::Standard_ErrorHandlerCallback | ( | ) | [protected] |
virtual void Standard_ErrorHandlerCallback::DestroyCallback | ( | ) | [pure virtual] |