What does NSAutoreleasePool actually do?

[黃俊傑(Chun-Chieh Huang)]

Dear all,
    I have some questions about NSAutoreleasePool in GNUstep.

    I have written some code in OPENSTEP 4.2. I recalled that 
NSAutoreleasePool is cleaned up when the command loop refreshes. 
And I read dread.m and dwrite.m in GNUstep base source tarball.
The two files, dread.m and dwrite.m, are all command line tools, which
doesn't need GUI portion. So I think there should be no command loops
in such a command line tool. But how come there is a NSAutoreleasePool
instance? 

    If it does exist a command loop, what is the loop exactly? And how
is it operated? If it doesn't exist a command loop, when are objects
in the pool to be cleaned up? 



P.S.
    Thanks for those who helped me about making command line tools.
I use tool.make in my GNUmakefile.
In my main.m, I created an NSAutoreleasePool, and create my simulator
instance, set it up, and then make it peform some actions. Finally, I
release my simulator instance and the pool. I need to modify some
memory management, but it works. Thanks.
-- 
Chun-Chieh Huang(黃俊傑)       | E-mail: jjhuang AT cm.nctu.edu.tw
Department of Computer Science | 
National Tsing Hua University  | MIME/ASCII/PDF/PostScript are welcome!
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