RE: Thread expierence with bison

[Xinan Tang]

Hi

  I should warn you that the code generated by flex and bison is thread safe 
doesn't mean that the entire code is thread safe. The programmers need to 
guarantee that any code inserted between %{ .... %} is thread too.


Xinan Tang (Ph.D)
Senior MTS
Xambala Inc
2025 Gateway Place, Suite 130
San Jose, CA 95110

-----Original Message-----
From: John [mailto:address@hidden 
Sent: Wednesday, April 23, 2003 12:45 AM
To: Rüdiger Härtel
Cc: address@hidden
Subject: Re: Thread expierence with bison

> What are your experiences with a flex/bison built scanner/parser
> (threads/processes, longlevity, RAM consumption ...) ?  Where are
> pitfalls ?

The latest flex can generate a thread-safe scanner (%option reentrant)
and even unload the large DFA tables when you're done scanning. Bison
can generate a thread-safe parser (%pure). One pitfall is that you
have to hand over the flow-control of your program to the flex and
bison-generated code, which operates in the form of callback blocks.



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