python, hg: tow outside the environment.

they've served us well, and can ride off into the sunset.

1 files changed, 0 insertions, 159 deletions

diff --git a/sys/src/cmd/python/Demo/threads/Coroutine.py b/sys/src/cmd/python/Demo/threads/Coroutine.py
deleted file mode 100644
index 4cc65f7bf..000000000
--- a/sys/src/cmd/python/Demo/threads/Coroutine.py
+++ /dev/null
@@ -1,159 +0,0 @@
-# Coroutine implementation using Python threads.
-#
-# Combines ideas from Guido's Generator module, and from the coroutine
-# features of Icon and Simula 67.
-#
-# To run a collection of functions as coroutines, you need to create
-# a Coroutine object to control them:
-#    co = Coroutine()
-# and then 'create' a subsidiary object for each function in the
-# collection:
-#    cof1 = co.create(f1 [, arg1, arg2, ...]) # [] means optional,
-#    cof2 = co.create(f2 [, arg1, arg2, ...]) #... not list
-#    cof3 = co.create(f3 [, arg1, arg2, ...])
-# etc.  The functions need not be distinct; 'create'ing the same
-# function multiple times gives you independent instances of the
-# function.
-#
-# To start the coroutines running, use co.tran on one of the create'd
-# functions; e.g., co.tran(cof2).  The routine that first executes
-# co.tran is called the "main coroutine".  It's special in several
-# respects:  it existed before you created the Coroutine object; if any of
-# the create'd coroutines exits (does a return, or suffers an unhandled
-# exception), EarlyExit error is raised in the main coroutine; and the
-# co.detach() method transfers control directly to the main coroutine
-# (you can't use co.tran() for this because the main coroutine doesn't
-# have a name ...).
-#
-# Coroutine objects support these methods:
-#
-# handle = .create(func [, arg1, arg2, ...])
-#    Creates a coroutine for an invocation of func(arg1, arg2, ...),
-#    and returns a handle ("name") for the coroutine so created.  The
-#    handle can be used as the target in a subsequent .tran().
-#
-# .tran(target, data=None)
-#    Transfer control to the create'd coroutine "target", optionally
-#    passing it an arbitrary piece of data. To the coroutine A that does
-#    the .tran, .tran acts like an ordinary function call:  another
-#    coroutine B can .tran back to it later, and if it does A's .tran
-#    returns the 'data' argument passed to B's tran.  E.g.,
-#
-#    in coroutine coA   in coroutine coC    in coroutine coB
-#      x = co.tran(coC)   co.tran(coB)        co.tran(coA,12)
-#      print x # 12
-#
-#    The data-passing feature is taken from Icon, and greatly cuts
-#    the need to use global variables for inter-coroutine communication.
-#
-# .back( data=None )
-#    The same as .tran(invoker, data=None), where 'invoker' is the
-#    coroutine that most recently .tran'ed control to the coroutine
-#    doing the .back.  This is akin to Icon's "&source".
-#
-# .detach( data=None )
-#    The same as .tran(main, data=None), where 'main' is the
-#    (unnameable!) coroutine that started it all.  'main' has all the
-#    rights of any other coroutine:  upon receiving control, it can
-#    .tran to an arbitrary coroutine of its choosing, go .back to
-#    the .detach'er, or .kill the whole thing.
-#
-# .kill()
-#    Destroy all the coroutines, and return control to the main
-#    coroutine.  None of the create'ed coroutines can be resumed after a
-#    .kill().  An EarlyExit exception does a .kill() automatically.  It's
-#    a good idea to .kill() coroutines you're done with, since the
-#    current implementation consumes a thread for each coroutine that
-#    may be resumed.
-
-import thread
-import sync
-
-class _CoEvent:
-    def __init__(self, func):
-        self.f = func
-        self.e = sync.event()
-
-    def __repr__(self):
-        if self.f is None:
-            return 'main coroutine'
-        else:
-            return 'coroutine for func ' + self.f.func_name
-
-    def __hash__(self):
-        return id(self)
-
-    def __cmp__(x,y):
-        return cmp(id(x), id(y))
-
-    def resume(self):
-        self.e.post()
-
-    def wait(self):
-        self.e.wait()
-        self.e.clear()
-
-Killed = 'Coroutine.Killed'
-EarlyExit = 'Coroutine.EarlyExit'
-
-class Coroutine:
-    def __init__(self):
-        self.active = self.main = _CoEvent(None)
-        self.invokedby = {self.main: None}
-        self.killed = 0
-        self.value  = None
-        self.terminated_by = None
-
-    def create(self, func, *args):
-        me = _CoEvent(func)
-        self.invokedby[me] = None
-        thread.start_new_thread(self._start, (me,) + args)
-        return me
-
-    def _start(self, me, *args):
-        me.wait()
-        if not self.killed:
-            try:
-                try:
-                    apply(me.f, args)
-                except Killed:
-                    pass
-            finally:
-                if not self.killed:
-                    self.terminated_by = me
-                    self.kill()
-
-    def kill(self):
-        if self.killed:
-            raise TypeError, 'kill() called on dead coroutines'
-        self.killed = 1
-        for coroutine in self.invokedby.keys():
-            coroutine.resume()
-
-    def back(self, data=None):
-        return self.tran( self.invokedby[self.active], data )
-
-    def detach(self, data=None):
-        return self.tran( self.main, data )
-
-    def tran(self, target, data=None):
-        if not self.invokedby.has_key(target):
-            raise TypeError, '.tran target %r is not an active coroutine' % (target,)
-        if self.killed:
-            raise TypeError, '.tran target %r is killed' % (target,)
-        self.value = data
-        me = self.active
-        self.invokedby[target] = me
-        self.active = target
-        target.resume()
-
-        me.wait()
-        if self.killed:
-            if self.main is not me:
-                raise Killed
-            if self.terminated_by is not None:
-                raise EarlyExit, '%r terminated early' % (self.terminated_by,)
-
-        return self.value
-
-# end of module