Re: [Plplot-devel] Error report system plus thread safety

[Hazen B. <hba...@ma...>]

On 02/27/2016 10:10 PM, Alan W. Irwin wrote:
> On 2016-02-27 23:22-0000 Phil Rosenberg wrote:
>
>> Perhaps it would be good for Hazen and Alan to start looking
> in more detail at implementing the error code propagation? If there
> are tools to help with that, then maybe it will be easier than I
> suspect.
>
> I am now confident of the return code method because of the
> 'warn_unused_result' gcc attribute capability, but let's not even
> start the substantial work required for this alternative unless it is
> made necessary because you run into some showstopper issue with the C
> exception-based alternative.

Before you begin I would encourage you to read this:

http://stackoverflow.com/questions/14685406/practical-usage-of-setjmp-and-longjmp-in-c

Particularly the 2nd and 3rd answers. As they point out, this is *not* 
C++ exception handling in C, this is just a goto statement. To me that 
would be a showstopper issue. However, who does the work decides, so if 
this approach is still your preference then I won't persist in trying to 
dissuade you.

-Hazen