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Subject: Re: multitasking/threading in DJGPP
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From: batchex <thedark1NOthSPAM AT phreaker DOT net DOT invalid>
Newsgroups: comp.os.msdos.djgpp
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Date: Mon, 26 Jun 2000 13:32:24 -0700
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NNTP-Posting-Date: Mon, 26 Jun 2000 13:34:42 PDT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hi,

I am now thinking on how to destroy a thread when it finished
it's job. My original idea is to write a multithreaded lib to
support more than one functions to execute concurrently. I have
no intentions, at least not now, to support different programs
to execute concurrently.

The idea is to call a spawn_thread() function to setup a new
thread, which is actually another function running in paralel
with the main program. What I'm confused with when that function
returns, how can I detect this and how to clean up the mess.

One way to do this IMO is by using a job_done flag and end_thread
() function which have a pseudo-code like this :

1. set this thread's job_done flag to true
2. enter an infinite loop

end_thread() is called at the end of a thread function. It's the
scheduler job to check the job_done flag for every thread and if
it finds a thread with a true flag, then do the necessary
cleanup.

Plz tell me what you think. BTW, my questions regarding a
comprehensive signals guide and how to determine the source of a
signal still stands.

Thanks

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