Author: Ross Boyd
Date: 16:15:50 06/20/04
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On June 20, 2004 at 12:08:16, Gerd Isenberg wrote: >On June 20, 2004 at 06:00:58, Ross Boyd wrote: > >>My engine (coded in C) uses longjmp() to terminate a search. >> >>Is there any disadvantage or hidden overhead in this approach? >> >>I notice other engines use a flag which is tested at every node of the search. >>Surely there's an overhead in doing it that way???? >> >>I suppose the main drawback of longjmp() is portability. Most languages other >>than C don't support it. >> >>Am I missing something? >> >>Ross > >Yes, there is a tiny overhead if asking a flag everywhere in the search. > >I never used setjmp()/longjmp() so far in C or C++, but C++ try-catch blocks, as >recently in my recursive De Bruijn generator. You may throw different values for >different reasons and interprete it inside a catch(int e) or >catch(ownExceptionType e) block. > >Gerd // snip DeBruijn code It looks very similar in functionality to longjmp() but much neater. No need to pass the jump variable around or use a global. I must experiment with it. Thanks Gerd.
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