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Subject: Re: [boost] Half-baked GIL IO extension review
From: Domagoj Saric (dsaritz_at_[hidden])
Date: 2010-12-07 12:19:17

"Emil Dotchevski" <emildotchevski_at_[hidden]> wrote in message
> On Mon, Dec 6, 2010 at 3:10 PM, Edd Dawson <lists_at_[hidden]> wrote:
>> Looking again at the JPEG code here. As far as I can tell setjmp/longjmp
>> have been used with appropriate care, but I worry what will happen if a
>> method on a Device throws an exception, for example. I've had both Visual
>> C++ 2008 and Apple's g++ 4.0.1 crash on me in this kind of situation.
> Did you use -fexceptions with GCC, and if I'm not mistaken MSVC also
> has an option to assume that C functions don't throw exceptions, which
> shouldn't be used for exceptions to work.

Exceptions work just fine without /EHs (at least with MSVC, which also
defaults to extern C=nothrow)...or did you mean in this particular case
(throwing through a C lib)?

Either way, compiling the entire binary with "extern C exceptions" is an is enough to wrap the affected functions in wrappers properly
decorated with "throw (...)"...and in addition, depending on how C++
exceptions are implemented on a particular platform, it may be needed to
recompile the C lib with C++ exception support enabled (no necessary with
MSVC for example)...

"What Huxley teaches is that in the age of advanced technology, spiritual
devastation is more likely to come from an enemy with a smiling face than
from one whose countenance exudes suspicion and hate."
Neil Postman

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