Code reuse in exception handling

Question

I\'m developing a C api for some functionality written in C++ and I want to make sure that no exceptions are propagated out of any of the exported C functions.

The s

Answer 1

You can use only one handler function for all possible exceptions, and call it from each or your API implementation functions, as below:

int HandleException()
{
    try 
    {
        throw;
    }

    // TODO: add more types of exceptions

    catch( std::bad_alloc & ) 
    {
       return ERROR_BAD_ALLOC;
    }
    catch( ... )
    {
        return ERROR_UNHANDLED_EXCEPTION;
    }
}

And in each exported function:

try
{
    ...
}
catch( ... )
{
    return HandleException();
}