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2006.09.22 18:16 "Re: libjpeg", by Bob Friesenhahn
On Fri, 22 Sep 2006, Joris wrote: > > Here, my comment on your other mail, that longjmp is not a part of > LibJpeg but at most one of the options at the disposal of caller > implementation, does not work, as longjump *is* a part of tif_jpeg and > tif_ojpeg. > > So I'm left with two questions > 1) Is the longjmp system really unsafe? I mean nowadays, on most > systems, as opposed to being unsafe on one or two systems a decade ago. > 2) If this really is an issue, are exceptions a good alternative? Or do > Linux guys not have exceptions? Are exceptions portable? As I mentioned, it is system dependent. The system I use daily documents these interfaces to be not thread safe. Others do the same, or don't document thread safety issues at all. Exceptions require using C++ (to throw and catch the exception) and compiling the library (or at least linking it) using a C++ compiler. It used to be that some C++ exception implementations were not thread safe but current ones seem to be thread safe. C++ exceptions are pretty portable on modern systems using modern compilers since they are part of the C++ standard. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/