By the way, the picolisp twitter account is great !!! :-)
JC
> On May 8, 2022, at 14:08, Alexander Burger wrote:
>
> Hi all,
>
> a new Wiki article about internal background processing, asynchronous events
> and
> family IPC in PicoLisp:
>
> https://picolisp.
Hi all,
a new Wiki article about internal background processing, asynchronous events and
family IPC in PicoLisp:
https://picolisp.com/wiki/?background
I think this was not yet documented anywhere.
☺/ A!ex
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Hi Alex,
The fifo is there to defer requests for chopsticks when the
philosopher is hungry or eating. Do you have any other mechanism in
mind?
As the tell - hear mechanism is a pipe, it behaves like a fifo. So I
would expect that this would suffice.
Not due to the logic of the algorithm,
Hi Alex,
There is no other place where the internal event loop (the
C-function waitFd()) is called.
I see.
I'm wondering whether the 'fifo' is really necessary?
The fifo is there to defer requests for chopsticks when the
philosopher is hungry or eating. Do you have any other mechanism in
Hi all,
the Chandy / Misra solution to Dining Philosophers Problem in picolisp
seems to be working now so the code is now at
http://logand.com/sw/phil.l for anybody interested.
The problem with the previous code was that once the hungry
philosopher handed over his dirty fork, he had to ask to
called explicitly by a top level parent process. The reason is
that upon a 'fork', the 'hear' channel is automatically set up in
the child process to be used by the built-in IPC routines.
I see, where can I find this automatic channel, is it a named pipe?
If not, what channel is used for communication
Hi Tomas,
for phil.l, I'd suggest another change (besides the call to 'hear').
You tried to use 'rpc' to send messages to the other philosophers. While
this is basically a correct idea, 'rpc' is not suitable in the current
situation. It sends the message via standard output, and is intended to
Hi Alex,
I am struggling to understand picolisp IPC functions (hear, tell, rpc,
sync...). I have attached code for the Dining Philosophers problem
which gets stuck after calling 'hear' in the philosopher (child)
process. The idea is that each philosopher is a process which opens a
fifo and all
