threads: simplify 'suspend' combinator

basis/alarms/alarms-tests.factor

@@ -11,7 +11,6 @@ IN: alarms.tests
 ] unit-test
 
 [ ] [
-    [
+    self [ resume ] curry instant later drop
-        [ resume ] curry instant later drop
+    "test" suspend drop
-    ] "test" suspend drop
 ] unit-test

basis/channels/channels.factor

@@ -17,7 +17,7 @@ GENERIC: from ( channel -- value )
 <PRIVATE
 
 : wait ( channel -- )
-    [ senders>> push ] curry
+    [ self ] dip senders>> push
     "channel send" suspend drop ;
 
 : (to) ( value receivers -- )
@@ -36,7 +36,7 @@ M: channel to ( value channel -- )
     [ dup wait to ] [ nip (to) ] if-empty ;
 
 M: channel from ( channel -- value )
-    [
+    [ self ] dip
     notify senders>>
     [ (from) ] unless-empty
-    ] curry "channel receive" suspend ;
+    "channel receive" suspend ;

basis/concurrency/conditions/conditions.factor

@@ -1,4 +1,4 @@
-! Copyright (C) 2008 Slava Pestov.
+! Copyright (C) 2008, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: deques threads kernel arrays sequences alarms fry ;
 IN: concurrency.conditions
@@ -22,10 +22,13 @@ IN: concurrency.conditions
 
 ERROR: wait-timeout ;
 
+: queue ( queue -- )
+    [ self ] dip push-front ;
+
 : wait ( queue timeout status -- )
     over [
-        [ queue-timeout [ drop ] ] dip suspend
+        [ queue-timeout ] dip suspend
         [ wait-timeout ] [ cancel-alarm ] if
     ] [
-        [ drop '[ _ push-front ] ] dip suspend drop
+        [ drop queue ] dip suspend drop
     ] if ;

basis/concurrency/exchangers/exchangers.factor

@@ -1,4 +1,4 @@
-! Copyright (C) 2008 Slava Pestov.
+! Copyright (C) 2008, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel threads boxes accessors fry ;
 IN: concurrency.exchangers
@@ -17,5 +17,6 @@ TUPLE: exchanger thread object ;
         [ thread>> box> resume-with ] dip
     ] [
         [ object>> >box ] keep
-        '[ _ thread>> >box ] "exchange" suspend
+        [ self ] dip thread>> >box
+        "exchange" suspend
     ] if ;

basis/deques/deques.factor

@@ -1,4 +1,4 @@
-! Copyright (C) 2008, 2009 Slava Pestov.
+! Copyright (C) 2008, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel sequences math fry ;
 IN: deques
@@ -16,22 +16,22 @@ GENERIC: node-value ( node -- value )
 GENERIC: deque-empty? ( deque -- ? )
 
 : push-front ( obj deque -- )
-    push-front* drop ;
+    push-front* drop ; inline
 
 : push-all-front ( seq deque -- )
     [ push-front ] curry each ;
 
 : push-back ( obj deque -- )
-    push-back* drop ;
+    push-back* drop ; inline
 
 : push-all-back ( seq deque -- )
     [ push-back ] curry each ;
 
 : pop-front ( deque -- obj )
-    [ peek-front ] [ pop-front* ] bi ;
+    [ peek-front ] [ pop-front* ] bi ; inline
 
 : pop-back ( deque -- obj )
-    [ peek-back ] [ pop-back* ] bi ;
+    [ peek-back ] [ pop-back* ] bi ; inline
 
 : slurp-deque ( deque quot -- )
     [ drop '[ _ deque-empty? not ] ]

basis/io/backend/unix/unix.factor

@@ -67,12 +67,11 @@ M: io-timeout summary drop "I/O operation timed out" ;
 
 : wait-for-fd ( handle event -- )
     dup +retry+ eq? [ 2drop ] [
-        '[
+        [ [ self ] dip handle-fd mx get-global ] dip {
-            swap handle-fd mx get-global _ {
             { +input+ [ add-input-callback ] }
             { +output+ [ add-output-callback ] }
         } case
-        ] "I/O" suspend nip [ io-timeout ] when
+        "I/O" suspend [ io-timeout ] when
     ] if ;
 
 : wait-for-port ( port event -- )

basis/io/backend/windows/nt/nt.factor

@@ -40,8 +40,8 @@ M: winnt add-completion ( win32-handle -- )
 : twiddle-thumbs ( overlapped port -- bytes-transferred )
     [
         drop
-        [ >c-ptr pending-overlapped get-global set-at ] curry "I/O" suspend
+        [ self ] dip >c-ptr pending-overlapped get-global set-at
-        {
+        "I/O" suspend {
             { [ dup integer? ] [ ] }
             { [ dup array? ] [
                 first dup eof?

basis/io/launcher/launcher.factor

@@ -129,12 +129,8 @@ M: process-was-killed error.
 
 : (wait-for-process) ( process -- status )
     dup handle>>
-    [
+    [ self over processes get at push "process" suspend drop ] when
-        dup [ processes get at push ] curry
+    dup killed>> [ process-was-killed ] [ status>> ] if ;
-        "process" suspend drop
-    ] when
-    dup killed>>
-    [ process-was-killed ] [ status>> ] if ;
 
 : wait-for-process ( process -- status )
     [ (wait-for-process) ] with-timeout ;

basis/threads/threads-docs.factor

@@ -142,10 +142,8 @@ HELP: interrupt
 { $description "Interrupts a sleeping thread." } ;
 
 HELP: suspend
-{ $values { "quot" { $quotation "( thread -- )" } } { "state" string } { "obj" object } }
+{ $values { "state" string } { "obj" object } }
-{ $description "Suspends the current thread and passes it to the quotation."
+{ $description "Suspends the current thread. Control yields to the next runnable thread and the current thread does not execute again until it is resumed, and so the caller of this word must arrange for another thread to later resume the suspended thread with a call to " { $link resume } " or " { $link resume-with } "."
-$nl
-"After the quotation returns, control yields to the next runnable thread and the current thread does not execute again until it is resumed, and so the quotation must arrange for another thread to later resume the suspended thread with a call to " { $link resume } " or " { $link resume-with } "."
 $nl
 "The status string is for debugging purposes; see " { $link "tools.threads" } "." } ;
 

basis/threads/threads-tests.factor

@@ -13,9 +13,7 @@ yield
 [ ] [ 0.3 sleep ] unit-test
 [ "hey" sleep ] must-fail
 
-[ 3 ] [
+[ 3 ] [ 3 self resume-with "Test suspend" suspend ] unit-test
-    [ 3 swap resume-with ] "Test suspend" suspend
-] unit-test
 
 [ f ] [ f get-global ] unit-test
 
@@ -29,8 +27,6 @@ yield
     ] parallel-map
 ] unit-test
 
-[ [ 3 throw ] "A" suspend ] [ 3 = ] must-fail-with
-
 :: spawn-namespace-test ( -- ? )
     <promise> :> p gensym :> g
     [

basis/threads/threads.factor

@@ -1,4 +1,4 @@
-! Copyright (C) 2004, 2009 Slava Pestov.
+! Copyright (C) 2004, 2010 Slava Pestov.
 ! Copyright (C) 2005 Mackenzie Straight.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays hashtables heaps kernel kernel.private math
@@ -12,8 +12,8 @@ IN: threads
 ! (set-context) and (start-context) are sub-primitives, but
 ! we don't want them inlined into callers since their behavior
 ! depends on what frames are on the callstack
-: start-context ( obj quot: ( obj -- * ) -- ) (start-context) ;
+: set-context ( obj context -- obj' ) (set-context) ;
-: set-context ( context -- ) (set-context) ;
+: start-context ( obj quot: ( obj -- * ) -- obj' ) (start-context) ;
 
 PRIVATE>
 
@@ -24,14 +24,15 @@ TUPLE: thread
 { quot callable initial: [ ] }
 { exit-handler callable initial: [ ] }
 { id integer }
-continuation
+{ continuation box }
 state
 runnable
 mailbox
-variables
+{ variables hashtable }
 sleep-entry ;
 
-: self ( -- thread ) 63 special-object ; inline
+: self ( -- thread )
+    63 special-object { thread } declare ; inline
 
 ! Thread-local storage
 : tnamespace ( -- assoc )
@@ -46,9 +47,11 @@ sleep-entry ;
 : tchange ( key quot -- )
     tnamespace swap change-at ; inline
 
-: threads ( -- assoc ) 64 special-object ;
+: threads ( -- assoc )
+    64 special-object { hashtable } declare ; inline
 
-: thread ( id -- thread ) threads at ;
+: thread ( id -- thread )
+    threads at ;
 
 : thread-registered? ( thread -- ? )
     id>> threads key? ;
@@ -85,9 +88,11 @@ PRIVATE>
 : <thread> ( quot name -- thread )
     \ thread new-thread ;
 
-: run-queue ( -- dlist ) 65 special-object ;
+: run-queue ( -- dlist )
+    65 special-object { dlist } declare ; inline
 
-: sleep-queue ( -- heap ) 66 special-object ;
+: sleep-queue ( -- heap )
+    66 special-object { dlist } declare ; inline
 
 : resume ( thread -- )
     f >>state
@@ -175,25 +180,22 @@ DEFER: next
 
 PRIVATE>
 
-: stop ( -- )
+: stop ( -- * )
     self [ exit-handler>> call( -- ) ] [ unregister-thread ] bi next ;
 
-: suspend ( quot state -- obj )
+: suspend ( state -- obj )
-    [
+    self (>>state)
-        [ [ self swap call ] dip self (>>state) ] dip
+    [ self continuation>> >box next ] callcc1 ; inline
-        self continuation>> >box
-        next
-    ] callcc1 2nip ; inline
 
-: yield ( -- ) [ resume ] f suspend drop ;
+: yield ( -- ) self resume f suspend drop ;
 
 GENERIC: sleep-until ( n/f -- )
 
 M: integer sleep-until
-    '[ _ schedule-sleep ] "sleep" suspend drop ;
+    [ self ] dip schedule-sleep "sleep" suspend drop ;
 
 M: f sleep-until
-    drop [ drop ] "interrupt" suspend drop ;
+    drop "interrupt" suspend drop ;
 
 GENERIC: sleep ( dt -- )
 
@@ -218,7 +220,7 @@ M: real sleep
 
 : in-thread ( quot -- )
     [ datastack ] dip
-    '[ _ set-datastack _ call ]
+    '[ _ set-datastack @ ]
     "Thread" spawn drop ;
 
 GENERIC: error-in-thread ( error thread -- )

basis/tools/continuations/continuations.factor

@@ -1,10 +1,11 @@
-! Copyright (C) 2009 Slava Pestov.
+! Copyright (C) 2009, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: threads kernel namespaces continuations combinators
+USING: threads threads.private kernel namespaces continuations
-sequences math namespaces.private continuations.private
+combinators sequences math namespaces.private
-concurrency.messaging quotations kernel.private words
+continuations.private concurrency.messaging quotations
-sequences.private assocs models models.arrow arrays accessors
+kernel.private words sequences.private assocs models
-generic generic.single definitions make sbufs tools.crossref fry ;
+models.arrow arrays accessors generic generic.single definitions
+make sbufs tools.crossref fry ;
 IN: tools.continuations
 
 <PRIVATE
@@ -126,6 +127,7 @@ PRIVATE>
     >n ndrop >c c>
     continue continue-with
     stop suspend (spawn)
+    set-context start-context
 } [ don't-step-into ] each
 
 \ break [ break ] "step-into" set-word-prop