Changeset 1e5d0f0c for doc/papers/concurrency/examples/Pingpong.py

Timestamp:

Mar 27, 2019, 9:07:47 AM (6 years ago)

Author:

Peter A. Buhr <pabuhr@…>

Branches:

ADT, arm-eh, ast-experimental, cleanup-dtors, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

86fb8f2

Parents:

0087e0e

Message:

start rewrite of coroutine section

File:

• doc/papers/concurrency/examples/Pingpong.py (modified) (1 diff)

doc/papers/concurrency/examples/Pingpong.py

@@ -1 @@
-def Scheduler
+def PingPong( name, N ):
+        partner = (yield)           # get partner
+        yield                       # resume scheduler
+        for i in range( N ):
+                print( name )
+                yield partner           # execute next
+        print( "end", name )
+
+def Scheduler():
+        n = (yield)                 # starting coroutine
+        while True:
+                n = next( n )           # schedule coroutine
+
+pi = PingPong( "ping", 5 )
+po = PingPong( "pong", 5 )
+next( pi )                      # prime
+pi.send( po )                   # send partner
+next( po )                      # prime
+po.send( pi )                   # send partner
+
+s = Scheduler();
+next( s )                       # prime
 try:
-        yield from ping();
-        yield from pong();
+        s.send( pi )                            # start cycle
 except StopIteration:
-        print( "Scheduler stop" )
-
-
-def pong():
-        print( "pong" )
-for i in range( 10 ):
-
-                yield from ping()
-        print( "stop pong" )
-
-def ping():
-        global i
-        print( "ping" )
-        i += 1
-        if i < 5:
-                yield from pong()
-        print( "stop ping" )
-
-p = ping()
-try:
-        next( p )
-except StopIteration:
-        print( "stop" )
+        print( "scheduler stop" )
+print( "stop" )
 
 # Local Variables: #
 # tab-width: 4 #
-# compile-command: "python3.5 pingpong.py" #
+# compile-command: "python3.5 Pingpong.py" #
 # End: #