Multithreading

[luserdroog]

I've stitched-up a partly working fork operator as of revision http://code.google.com/p/xpost/source/detail?r=be625c0d2d18d05264dbc36d69d579c20e01d1f8 .

 

PS>mark { (hello world!\n) print yield } fork (hello back!\n) print yield
hello world!
hello back!
bye!

 

The child has no "cushion" on its exec stack, so it falls off the bottom and the interpreter quits (its failsafe action). This should be changed so the context becomes a zombie and then I can write -join- to search for them.

 

baby steps.

[luserdroog]

Ok. I've got the basic dps context operators appearing to work acceptably.

 

mark obj0..objn proc  fork  context

context  join  mark obj0..objn

-  yield  -

context  detach  -

 

I still need to learn how to mutex data structures work. :(

 

   -  lock  lock
   create lock object

 

   lock proc  monitor  -
   execute proc while holding lock

 

   -  condition  condition
   create condition object

 

   lock condition  wait  -
   release lock, wait for condition, reacquire lock

 

   condition  notify  -
   resume contexts waiting for condition