Subject:
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Re: signals / legOS internals
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 26 Jun 1999 02:08:00 GMT
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Viewed:
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1171 times
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Kekoa Proudfoot wrote:
>
> I should add that since many things are vectored in this version of Librcx,
> overriding functionality is easy for the advanced user to do. For example:
>
> extern void (*__event_vector)(void);
>
> void my_setup_func()
> {
> // ...
> __event_vector = my_handler_func;
> // ...
> }
>
> It turns out that __event_vector is equivalent to the signal mechanism
> being discussed. The signal id (if you'd expect that) is implicit in the
> address of __event_vector; the updating of the signal handler must be done
> explicitly by managing __event_vector yourself.
So, should I abandon my implementation? If something every bit as good
is already there, it may be silly for me to continue. I haven't looked
at Librcx yet, so I don't completely understand how it works.
I think one of the original reasons for implementing signals may have
been to suspend and resume tasks.
> Actually, I bet this is slightly different from the signal mechanism being
> discussed, which probably has one vector per thread/process. Librcx only
> has a single, global set of vectors.
Ok, I know I'm being dense, but what are the implications of this?
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Message has 1 Reply:
 | | Re: signals / legOS internals
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| (...) No, you should not abandon your implementation - not if you want to use LegOS. I was only explaining how I implemented similar functionality, for the sake of comparison. Regarding Librcx, I might release another version at some point, to add (...) (25 years ago, 26-Jun-99, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: signals / legOS internals
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| (...) I should add that since many things are vectored in this version of Librcx, overriding functionality is easy for the advanced user to do. For example: extern void (*__event_vector)(void); void my_setup_func() { // ... __event_vector = (...) (25 years ago, 24-Jun-99, to lugnet.robotics.rcx.legos)
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