Index: ChangeLog
===================================================================
RCS file: /cvsroot/tcl/tcl/ChangeLog,v
retrieving revision 1.1453.2.398
diff -w -u -r1.1453.2.398 ChangeLog
--- ChangeLog	25 Jan 2005 17:58:38 -0000	1.1453.2.398
+++ ChangeLog	27 Jan 2005 22:49:18 -0000
@@ -1,3 +1,26 @@
+2005-01-27  Andreas Kupries <andreask@activestate.com>
+
+	TIP#218 IMPLEMENTATION
+
+	* generic/tclDecls.h:	Regenerated from tcl.decls.
+	* generic/tclStubInit.c:	
+
+	* doc/CrtChannel.3:	Documentation of extended API,
+	* generic/tcl.decls:	extended testsuite, and
+	* generic/tcl.h:	implementation. Removal of old
+	* generic/tclIO.c:	driver-specific TclpCut/Splice
+	* generic/tclInt.h:	functions. Replaced with generic
+	* tests/io.test:	thread-action calls through the
+	* unix/tclUnixChan.c:	new hooks. Update of all builtin
+	* unix/tclUnixPipe.c:	channel drivers to version 4.
+	* unix/tclUnixSock.c:	Windows drivers extended to 
+	* win/tclWinChan.c:	manage thread state in a thread
+	* win/tclWinConsole.c:	action handler.
+	* win/tclWinPipe.c:	
+	* win/tclWinSerial.c:	
+	* win/tclWinSock.c:	
+	* mac/tclMacChan.c:
+
 2005-01-25  Don Porter  <dgp@users.sourceforge.net>
 
         * library/auto.tcl:     Updated [auto_reset] to clear auto-loaded
Index: doc/CrtChannel.3
===================================================================
RCS file: /cvsroot/tcl/tcl/doc/CrtChannel.3,v
retrieving revision 1.16.2.2
diff -w -u -r1.16.2.2 CrtChannel.3
--- doc/CrtChannel.3	2 Nov 2004 09:21:25 -0000	1.16.2.2
+++ doc/CrtChannel.3	27 Jan 2005 22:49:18 -0000
@@ -7,11 +7,11 @@
 '\"
 '\" RCS: @(#) $Id: CrtChannel.3,v 1.16.2.2 2004/11/02 09:21:25 dkf Exp $
 .so man.macros
-.TH Tcl_CreateChannel 3 8.3 Tcl "Tcl Library Procedures"
+.TH Tcl_CreateChannel 3 8.4 Tcl "Tcl Library Procedures"
 .BS
 '\" Note:  do not modify the .SH NAME line immediately below!
 .SH NAME
-Tcl_CreateChannel, Tcl_GetChannelInstanceData, Tcl_GetChannelType, Tcl_GetChannelName, Tcl_GetChannelHandle, Tcl_GetChannelMode, Tcl_GetChannelBufferSize, Tcl_SetChannelBufferSize, Tcl_NotifyChannel, Tcl_BadChannelOption, Tcl_ChannelName, Tcl_ChannelVersion, Tcl_ChannelBlockModeProc, Tcl_ChannelCloseProc, Tcl_ChannelClose2Proc, Tcl_ChannelInputProc, Tcl_ChannelOutputProc, Tcl_ChannelSeekProc, Tcl_ChannelWideSeekProc, Tcl_ChannelSetOptionProc, Tcl_ChannelGetOptionProc, Tcl_ChannelWatchProc, Tcl_ChannelGetHandleProc, Tcl_ChannelFlushProc, Tcl_ChannelHandlerProc, Tcl_IsChannelShared, Tcl_IsChannelRegistered, Tcl_CutChannel, Tcl_SpliceChannel, Tcl_IsChannelExisting, Tcl_ClearChannelHandlers, Tcl_GetChannelThread, Tcl_ChannelBuffered \- procedures for creating and manipulating channels
+Tcl_CreateChannel, Tcl_GetChannelInstanceData, Tcl_GetChannelType, Tcl_GetChannelName, Tcl_GetChannelHandle, Tcl_GetChannelMode, Tcl_GetChannelBufferSize, Tcl_SetChannelBufferSize, Tcl_NotifyChannel, Tcl_BadChannelOption, Tcl_ChannelName, Tcl_ChannelVersion, Tcl_ChannelBlockModeProc, Tcl_ChannelCloseProc, Tcl_ChannelClose2Proc, Tcl_ChannelInputProc, Tcl_ChannelOutputProc, Tcl_ChannelSeekProc, Tcl_ChannelWideSeekProc, Tcl_ChannelSetOptionProc, Tcl_ChannelGetOptionProc, Tcl_ChannelWatchProc, Tcl_ChannelGetHandleProc, Tcl_ChannelFlushProc, Tcl_ChannelHandlerProc, Tcl_ChannelThreadActionProc, Tcl_IsChannelShared, Tcl_IsChannelRegistered, Tcl_CutChannel, Tcl_SpliceChannel, Tcl_IsChannelExisting, Tcl_ClearChannelHandlers, Tcl_GetChannelThread, Tcl_ChannelBuffered \- procedures for creating and manipulating channels
 .SH SYNOPSIS
 .nf
 \fB#include <tcl.h>\fR
@@ -99,6 +99,9 @@
 .VS 8.4
 Tcl_DriverWideSeekProc *
 \fBTcl_ChannelWideSeekProc\fR(\fItypePtr\fR)
+.sp
+Tcl_DriverThreadActionProc *
+\fBTcl_ChannelThreadActionProc\fR(\fItypePtr\fR)
 .VE 8.4
 .sp
 Tcl_DriverSetOptionProc *
@@ -289,10 +292,20 @@
 (thread)global list of all channels (of the current thread).
 Application to a channel still registered in some interpreter
 is not allowed.
+.VS 8.4
+Also notifies the driver if the \fBTcl_ChannelType\fR version is
+\fBTCL_CHANNEL_VERSION_4\fR (or higher), and
+\fBTcl_DriverThreadActionProc\fR is defined for it.
+.VE 8.4
 .PP
 \fBTcl_SpliceChannel\fR adds the specified \fIchannel\fR to the
 (thread)global list of all channels (of the current thread).
 Application to a channel registered in some interpreter is not allowed.
+.VS 8.4
+Also notifies the driver if the \fBTcl_ChannelType\fR version is
+\fBTCL_CHANNEL_VERSION_4\fR (or higher), and
+\fBTcl_DriverThreadActionProc\fR is defined for it.
+.VE 8.4
 .PP
 \fBTcl_ClearChannelHandlers\fR removes all channelhandlers and event
 scripts associated with the specified \fIchannel\fR, thus shutting
@@ -326,6 +339,7 @@
 	Tcl_DriverFlushProc *\fIflushProc\fR;	
 	Tcl_DriverHandlerProc *\fIhandlerProc\fR;	
 	Tcl_DriverWideSeekProc *\fIwideSeekProc\fR;
+	Tcl_DriverThreadActionProc *\fIthreadActionProc\fR;
 } Tcl_ChannelType;
 .CE
 .PP
@@ -346,6 +360,7 @@
 \fBTcl_ChannelOutputProc\fR, \fBTcl_ChannelSeekProc\fR,
 .VS 8.4
 \fBTcl_ChannelWideSeekProc\fR,
+\fBTcl_ChannelThreadActionProc\fR,
 .VE 8.4
 \fBTcl_ChannelSetOptionProc\fR, \fBTcl_ChannelGetOptionProc\fR,
 \fBTcl_ChannelWatchProc\fR, \fBTcl_ChannelGetHandleProc\fR,
@@ -367,18 +382,27 @@
 
 .SH VERSION
 .PP
-The \fIversion\fR field should be set to \fBTCL_CHANNEL_VERSION_2\fR.
-If it is not set to this value \fBTCL_CHANNEL_VERSION_3\fR, then this
-\fBTcl_ChannelType\fR is assumed to have the older structure.  See
+
+The \fIversion\fR field should be set to the version of the structure
+that you require. \fBTCL_CHANNEL_VERSION_2\fR is the minimum recommended.
+.VS 8.4
+\fBTCL_CHANNEL_VERSION_3\fR must be set to specifiy the \fIwideSeekProc\fR member.
+.VE 8.4
+.VS 8.4
+\fBTCL_CHANNEL_VERSION_4\fR must be set to specifiy the
+\fIthreadActionProc\fR member (includes \fIwideSeekProc\fR).
+.VE 8.4
+If it is not set to any of these, then this
+\fBTcl_ChannelType\fR is assumed to have the original structure.  See
 \fBOLD CHANNEL TYPES\fR for more details.  While Tcl will recognize
-and function with either structure, stacked channels must be of at
+and function with either structures, stacked channels must be of at
 least \fBTCL_CHANNEL_VERSION_2\fR to function correctly.
 .PP
 This value can be retrieved with \fBTcl_ChannelVersion\fR, which returns
 .VS 8.4
-one of \fBTCL_CHANNEL_VERSION_3\fR,
+one of \fBTCL_CHANNEL_VERSION_4\fR, \fBTCL_CHANNEL_VERSION_3\fR,
 .VE 8.4
-\fBTCL_CHANNEL_VERSION_2\fR or \fBTCL_CHANNEL_VERSION_1\fR.
+\fBTCL_CHANNEL_VERSION_2\fR, or \fBTCL_CHANNEL_VERSION_1\fR.
 
 .SH BLOCKMODEPROC
 .PP
@@ -790,6 +814,35 @@
 This value can be retrieved with \fBTcl_ChannelHandlerProc\fR, which returns
 a pointer to the function.
 
+.VS 8.4
+.SH "THREADACTIONPROC"
+.PP
+The \fthreadActionProc\fR field contains the address of the function
+called by the generic layer when a channel is created, closed, or
+going to move to a different thread, i.e. whenever thread-specific
+driver state might have to initialized or updated. It can be NULL.
+The action \fITCL_CHANNEL_THREAD_REMOVE\fR is used to notify the
+driver that it should update or remove any thread-specific data it
+might be maintaining for the channel.
+.PP
+The action \fITCL_CHANNEL_THREAD_INSERT\fR is used to notify the
+driver that it should update or initialize any thread-specific data it
+might be maintaining using the calling thread as the associate. See
+\fBTcl_CutChannel\fR and \fBTcl_SpliceChannel\fR for more detail.
+.PP
+.CS
+typedef void Tcl_DriverThreadActionProc(
+	ClientData \fIinstanceData\fR,
+      int        \fIaction\fR);
+.CE
+.PP
+\fIInstanceData\fR is the same as the value passed to
+\fBTcl_CreateChannel\fR when this channel was created.
+.PP
+These values can be retrieved with \fBTcl_ChannelThreadActionProc\fR,
+which returns a pointer to the function.
+.VE 8.4
+
 .SH TCL_BADCHANNELOPTION
 .PP
 This procedure generates a "bad option" error message in an
Index: generic/tcl.decls
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tcl.decls,v
retrieving revision 1.94.2.2
diff -w -u -r1.94.2.2 tcl.decls
--- generic/tcl.decls	13 May 2003 09:57:40 -0000	1.94.2.2
+++ generic/tcl.decls	27 Jan 2005 22:49:18 -0000
@@ -1754,6 +1754,24 @@
 	    Tcl_ChannelType *chanTypePtr)
 }
 
+# Slots 494 to 553 are taken already by 8.5
+# #111 - Dicts            (494 ... 504)
+#  #59 - Config           (505)
+# #139 - Namespace API    (506 ... 517)
+# #137 - source -encoding (518)
+# #121 - ExitProc         (519)
+# #121 - Resource Limits  (520 ... 534)
+# #226 - S/R Interp State (535 ... 537)
+# #227 - S/G Return Opts  (538 ... 539)
+# #235 - Ensemble C API   (540 ... 551)
+# #233 - Virtualized Time (552 ... 553)
+
+# TIP#218 (Driver Thread Actions) davygrvy/akupries ChannelType ver 4
+# These slots are used by 8.5 as well.
+declare 554 generic {
+    Tcl_DriverThreadActionProc *Tcl_ChannelThreadActionProc(Tcl_ChannelType *chanTypePtr)
+}
+
 ##############################################################################
 
 # Define the platform specific public Tcl interface.  These functions are
Index: generic/tcl.h
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tcl.h,v
retrieving revision 1.153.2.16
diff -w -u -r1.153.2.16 tcl.h
--- generic/tcl.h	25 Nov 2004 00:19:27 -0000	1.153.2.16
+++ generic/tcl.h	27 Jan 2005 22:49:18 -0000
@@ -1425,6 +1425,14 @@
 #define TCL_CHANNEL_VERSION_1	((Tcl_ChannelTypeVersion) 0x1)
 #define TCL_CHANNEL_VERSION_2	((Tcl_ChannelTypeVersion) 0x2)
 #define TCL_CHANNEL_VERSION_3	((Tcl_ChannelTypeVersion) 0x3)
+#define TCL_CHANNEL_VERSION_4	((Tcl_ChannelTypeVersion) 0x4)
+
+/*
+ * TIP #218: Channel Actions, Ids for Tcl_DriverThreadActionProc
+ */
+
+#define TCL_CHANNEL_THREAD_INSERT (0)
+#define TCL_CHANNEL_THREAD_REMOVE (1)
 
 /*
  * Typedefs for the various operations in a channel type:
@@ -1460,6 +1468,9 @@
 		    ClientData instanceData, Tcl_WideInt offset,
 		    int mode, int *errorCodePtr));
 
+  /* TIP #218, Channel Thread Actions */
+typedef void     (Tcl_DriverThreadActionProc) _ANSI_ARGS_ ((
+		    ClientData instanceData, int action));
 
 /*
  * The following declarations either map ckalloc and ckfree to
@@ -1550,6 +1561,16 @@
 					 * handle 64-bit offsets. May be
 					 * NULL, and must be NULL if
 					 * seekProc is NULL. */
+
+     /*
+      * Only valid in TCL_CHANNEL_VERSION_4 channels or later
+      * TIP #218, Channel Thread Actions
+      */
+     Tcl_DriverThreadActionProc *threadActionProc;
+ 					/* Procedure to call to notify
+ 					 * the driver of thread specific
+ 					 * activity for a channel.
+					 * May be NULL. */
 } Tcl_ChannelType;
 
 /*
Index: generic/tclDecls.h
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tclDecls.h,v
retrieving revision 1.93.2.5
diff -w -u -r1.93.2.5 tclDecls.h
--- generic/tclDecls.h	10 Jun 2004 17:17:42 -0000	1.93.2.5
+++ generic/tclDecls.h	27 Jan 2005 22:49:18 -0000
@@ -1564,6 +1564,69 @@
 /* 493 */
 EXTERN Tcl_DriverWideSeekProc * Tcl_ChannelWideSeekProc _ANSI_ARGS_((
 				Tcl_ChannelType * chanTypePtr));
+/* Slot 494 is reserved */
+/* Slot 495 is reserved */
+/* Slot 496 is reserved */
+/* Slot 497 is reserved */
+/* Slot 498 is reserved */
+/* Slot 499 is reserved */
+/* Slot 500 is reserved */
+/* Slot 501 is reserved */
+/* Slot 502 is reserved */
+/* Slot 503 is reserved */
+/* Slot 504 is reserved */
+/* Slot 505 is reserved */
+/* Slot 506 is reserved */
+/* Slot 507 is reserved */
+/* Slot 508 is reserved */
+/* Slot 509 is reserved */
+/* Slot 510 is reserved */
+/* Slot 511 is reserved */
+/* Slot 512 is reserved */
+/* Slot 513 is reserved */
+/* Slot 514 is reserved */
+/* Slot 515 is reserved */
+/* Slot 516 is reserved */
+/* Slot 517 is reserved */
+/* Slot 518 is reserved */
+/* Slot 519 is reserved */
+/* Slot 520 is reserved */
+/* Slot 521 is reserved */
+/* Slot 522 is reserved */
+/* Slot 523 is reserved */
+/* Slot 524 is reserved */
+/* Slot 525 is reserved */
+/* Slot 526 is reserved */
+/* Slot 527 is reserved */
+/* Slot 528 is reserved */
+/* Slot 529 is reserved */
+/* Slot 530 is reserved */
+/* Slot 531 is reserved */
+/* Slot 532 is reserved */
+/* Slot 533 is reserved */
+/* Slot 534 is reserved */
+/* Slot 535 is reserved */
+/* Slot 536 is reserved */
+/* Slot 537 is reserved */
+/* Slot 538 is reserved */
+/* Slot 539 is reserved */
+/* Slot 540 is reserved */
+/* Slot 541 is reserved */
+/* Slot 542 is reserved */
+/* Slot 543 is reserved */
+/* Slot 544 is reserved */
+/* Slot 545 is reserved */
+/* Slot 546 is reserved */
+/* Slot 547 is reserved */
+/* Slot 548 is reserved */
+/* Slot 549 is reserved */
+/* Slot 550 is reserved */
+/* Slot 551 is reserved */
+/* Slot 552 is reserved */
+/* Slot 553 is reserved */
+/* 554 */
+EXTERN Tcl_DriverThreadActionProc * Tcl_ChannelThreadActionProc _ANSI_ARGS_((
+				Tcl_ChannelType * chanTypePtr));
 
 typedef struct TclStubHooks {
     struct TclPlatStubs *tclPlatStubs;
@@ -2117,6 +2180,67 @@
     Tcl_WideInt (*tcl_Seek) _ANSI_ARGS_((Tcl_Channel chan, Tcl_WideInt offset, int mode)); /* 491 */
     Tcl_WideInt (*tcl_Tell) _ANSI_ARGS_((Tcl_Channel chan)); /* 492 */
     Tcl_DriverWideSeekProc * (*tcl_ChannelWideSeekProc) _ANSI_ARGS_((Tcl_ChannelType * chanTypePtr)); /* 493 */
+    void *reserved494;
+    void *reserved495;
+    void *reserved496;
+    void *reserved497;
+    void *reserved498;
+    void *reserved499;
+    void *reserved500;
+    void *reserved501;
+    void *reserved502;
+    void *reserved503;
+    void *reserved504;
+    void *reserved505;
+    void *reserved506;
+    void *reserved507;
+    void *reserved508;
+    void *reserved509;
+    void *reserved510;
+    void *reserved511;
+    void *reserved512;
+    void *reserved513;
+    void *reserved514;
+    void *reserved515;
+    void *reserved516;
+    void *reserved517;
+    void *reserved518;
+    void *reserved519;
+    void *reserved520;
+    void *reserved521;
+    void *reserved522;
+    void *reserved523;
+    void *reserved524;
+    void *reserved525;
+    void *reserved526;
+    void *reserved527;
+    void *reserved528;
+    void *reserved529;
+    void *reserved530;
+    void *reserved531;
+    void *reserved532;
+    void *reserved533;
+    void *reserved534;
+    void *reserved535;
+    void *reserved536;
+    void *reserved537;
+    void *reserved538;
+    void *reserved539;
+    void *reserved540;
+    void *reserved541;
+    void *reserved542;
+    void *reserved543;
+    void *reserved544;
+    void *reserved545;
+    void *reserved546;
+    void *reserved547;
+    void *reserved548;
+    void *reserved549;
+    void *reserved550;
+    void *reserved551;
+    void *reserved552;
+    void *reserved553;
+    Tcl_DriverThreadActionProc * (*tcl_ChannelThreadActionProc) _ANSI_ARGS_((Tcl_ChannelType * chanTypePtr)); /* 554 */
 } TclStubs;
 
 #ifdef __cplusplus
@@ -4133,6 +4257,70 @@
 #define Tcl_ChannelWideSeekProc \
 	(tclStubsPtr->tcl_ChannelWideSeekProc) /* 493 */
 #endif
+/* Slot 494 is reserved */
+/* Slot 495 is reserved */
+/* Slot 496 is reserved */
+/* Slot 497 is reserved */
+/* Slot 498 is reserved */
+/* Slot 499 is reserved */
+/* Slot 500 is reserved */
+/* Slot 501 is reserved */
+/* Slot 502 is reserved */
+/* Slot 503 is reserved */
+/* Slot 504 is reserved */
+/* Slot 505 is reserved */
+/* Slot 506 is reserved */
+/* Slot 507 is reserved */
+/* Slot 508 is reserved */
+/* Slot 509 is reserved */
+/* Slot 510 is reserved */
+/* Slot 511 is reserved */
+/* Slot 512 is reserved */
+/* Slot 513 is reserved */
+/* Slot 514 is reserved */
+/* Slot 515 is reserved */
+/* Slot 516 is reserved */
+/* Slot 517 is reserved */
+/* Slot 518 is reserved */
+/* Slot 519 is reserved */
+/* Slot 520 is reserved */
+/* Slot 521 is reserved */
+/* Slot 522 is reserved */
+/* Slot 523 is reserved */
+/* Slot 524 is reserved */
+/* Slot 525 is reserved */
+/* Slot 526 is reserved */
+/* Slot 527 is reserved */
+/* Slot 528 is reserved */
+/* Slot 529 is reserved */
+/* Slot 530 is reserved */
+/* Slot 531 is reserved */
+/* Slot 532 is reserved */
+/* Slot 533 is reserved */
+/* Slot 534 is reserved */
+/* Slot 535 is reserved */
+/* Slot 536 is reserved */
+/* Slot 537 is reserved */
+/* Slot 538 is reserved */
+/* Slot 539 is reserved */
+/* Slot 540 is reserved */
+/* Slot 541 is reserved */
+/* Slot 542 is reserved */
+/* Slot 543 is reserved */
+/* Slot 544 is reserved */
+/* Slot 545 is reserved */
+/* Slot 546 is reserved */
+/* Slot 547 is reserved */
+/* Slot 548 is reserved */
+/* Slot 549 is reserved */
+/* Slot 550 is reserved */
+/* Slot 551 is reserved */
+/* Slot 552 is reserved */
+/* Slot 553 is reserved */
+#ifndef Tcl_ChannelThreadActionProc
+#define Tcl_ChannelThreadActionProc \
+	(tclStubsPtr->tcl_ChannelThreadActionProc) /* 554 */
+#endif
 
 #endif /* defined(USE_TCL_STUBS) && !defined(USE_TCL_STUB_PROCS) */
 
Index: generic/tclIO.c
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tclIO.c,v
retrieving revision 1.61.2.8
diff -w -u -r1.61.2.8 tclIO.c
--- generic/tclIO.c	10 Sep 2004 20:06:41 -0000	1.61.2.8
+++ generic/tclIO.c	27 Jan 2005 22:49:18 -0000
@@ -1208,18 +1208,19 @@
      * in the list on exit.
      *
      * JH: Could call Tcl_SpliceChannel, but need to avoid NULL check.
+     *
+     * TIP #218.
+     * AK: Just initialize the field to NULL before invoking Tcl_SpliceChannel
+     *     We need Tcl_SpliceChannel, for the threadAction calls.
+     *     There is no real reason to duplicate all of this.
+     * NOTE: All drivers using thread actions now have to perform their TSD
+     *       manipulation only in their thread action proc. Doing it when
+     *       creating their instance structures will collide with the thread
+     *       action activity and lead to damaged lists.
      */
 
-    statePtr->nextCSPtr	= tsdPtr->firstCSPtr;
-    tsdPtr->firstCSPtr	= statePtr;
-
-    /*
-     * TIP #10. Mark the current thread as the one managing the new
-     *          channel. Note: 'Tcl_GetCurrentThread' returns sensible
-     *          values even for a non-threaded core.
-     */
-
-    statePtr->managingThread = Tcl_GetCurrentThread ();
+    statePtr->nextCSPtr = (ChannelState *) NULL;
+    Tcl_SpliceChannel ((Tcl_Channel) chanPtr);
 
     /*
      * Install this channel in the first empty standard channel slot, if
@@ -2378,7 +2379,7 @@
  *	Resets the field 'nextCSPtr' of the specified channel state to NULL.
  *
  * NOTE:
- *	The channel to splice out of the list must not be referenced
+ *	The channel to cut out of the list must not be referenced
  *	in any interpreter. This is something this procedure cannot
  *	check (despite the refcount) because the caller usually wants
  *	fiddle with the channel (like transfering it to a different
@@ -2400,6 +2401,7 @@
                                          * channel out of the list on close. */
     ChannelState *statePtr = ((Channel *) chan)->state;
 					/* state of the channel stack. */
+    Tcl_DriverThreadActionProc *threadActionProc;
 
     /*
      * Remove this channel from of the list of all channels
@@ -2422,7 +2424,12 @@
 
     statePtr->nextCSPtr = (ChannelState *) NULL;
 
-    TclpCutFileChannel(chan);
+    /* TIP #218, Channel Thread Actions */
+    threadActionProc = Tcl_ChannelThreadActionProc (Tcl_GetChannelType (chan));
+    if (threadActionProc != NULL) {
+        (*threadActionProc) (Tcl_GetChannelInstanceData(chan),
+			     TCL_CHANNEL_THREAD_REMOVE);
+    }
 }
 
 /*
@@ -2441,7 +2448,7 @@
  *	Nothing.
  *
  * NOTE:
- *	The channel to add to the list must not be referenced in any
+ *	The channel to splice into the list must not be referenced in any
  *	interpreter. This is something this procedure cannot check
  *	(despite the refcount) because the caller usually wants figgle
  *	with the channel (like transfering it to a different thread)
@@ -2459,6 +2466,7 @@
 {
     ThreadSpecificData	*tsdPtr = TCL_TSD_INIT(&dataKey);
     ChannelState	*statePtr = ((Channel *) chan)->state;
+    Tcl_DriverThreadActionProc *threadActionProc;
 
     if (statePtr->nextCSPtr != (ChannelState *) NULL) {
         panic("Tcl_SpliceChannel: trying to add channel used in different list");
@@ -2475,7 +2483,12 @@
 
     statePtr->managingThread = Tcl_GetCurrentThread ();
 
-    TclpSpliceFileChannel(chan);
+    /* TIP #218, Channel Thread Actions */
+    threadActionProc = Tcl_ChannelThreadActionProc (Tcl_GetChannelType (chan));
+    if (threadActionProc != NULL) {
+        (*threadActionProc) (Tcl_GetChannelInstanceData(chan),
+			     TCL_CHANNEL_THREAD_INSERT);
+    }
 }
 
 /*
@@ -8902,6 +8915,8 @@
 	return TCL_CHANNEL_VERSION_2;
     } else if (chanTypePtr->version == TCL_CHANNEL_VERSION_3) {
 	return TCL_CHANNEL_VERSION_3;
+    } else if (chanTypePtr->version == TCL_CHANNEL_VERSION_4) {
+	return TCL_CHANNEL_VERSION_4;
     } else {
 	/*
 	 * In <v2 channel versions, the version field is occupied
@@ -9255,6 +9270,33 @@
     }
 }
 
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_ChannelThreadActionProc --
+ *
+ *	Return the Tcl_DriverThreadActionProc of the channel type.
+ *
+ * Results:
+ *	A pointer to the proc.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+Tcl_DriverThreadActionProc *
+Tcl_ChannelThreadActionProc(chanTypePtr)
+    Tcl_ChannelType *chanTypePtr;	/* Pointer to channel type. */
+{
+    if (HaveVersion(chanTypePtr, TCL_CHANNEL_VERSION_4)) {
+	return chanTypePtr->threadActionProc;
+    } else {
+	return NULL;
+    }
+}
+
 #if 0
 /* For future debugging work, a simple function to print the flags of
  * a channel in semi-readable form.
Index: generic/tclInt.h
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tclInt.h,v
retrieving revision 1.118.2.7
diff -w -u -r1.118.2.7 tclInt.h
--- generic/tclInt.h	21 Jul 2004 01:30:57 -0000	1.118.2.7
+++ generic/tclInt.h	27 Jan 2005 22:49:18 -0000
@@ -1749,8 +1749,6 @@
 EXTERN Tcl_Channel	TclpOpenFileChannel _ANSI_ARGS_((Tcl_Interp *interp,
 			    Tcl_Obj *pathPtr, int mode,
 			    int permissions));
-EXTERN void		TclpCutFileChannel _ANSI_ARGS_((Tcl_Channel chan));
-EXTERN void		TclpSpliceFileChannel _ANSI_ARGS_((Tcl_Channel chan));
 EXTERN void		TclpPanic _ANSI_ARGS_(TCL_VARARGS(CONST char *,
 			    format));
 EXTERN char *		TclpReadlink _ANSI_ARGS_((CONST char *fileName,
Index: generic/tclStubInit.c
===================================================================
RCS file: /cvsroot/tcl/tcl/generic/tclStubInit.c,v
retrieving revision 1.79.2.8
diff -w -u -r1.79.2.8 tclStubInit.c
--- generic/tclStubInit.c	14 Oct 2004 15:30:52 -0000	1.79.2.8
+++ generic/tclStubInit.c	27 Jan 2005 22:49:19 -0000
@@ -953,6 +953,67 @@
     Tcl_Seek, /* 491 */
     Tcl_Tell, /* 492 */
     Tcl_ChannelWideSeekProc, /* 493 */
+    NULL, /* 494 */
+    NULL, /* 495 */
+    NULL, /* 496 */
+    NULL, /* 497 */
+    NULL, /* 498 */
+    NULL, /* 499 */
+    NULL, /* 500 */
+    NULL, /* 501 */
+    NULL, /* 502 */
+    NULL, /* 503 */
+    NULL, /* 504 */
+    NULL, /* 505 */
+    NULL, /* 506 */
+    NULL, /* 507 */
+    NULL, /* 508 */
+    NULL, /* 509 */
+    NULL, /* 510 */
+    NULL, /* 511 */
+    NULL, /* 512 */
+    NULL, /* 513 */
+    NULL, /* 514 */
+    NULL, /* 515 */
+    NULL, /* 516 */
+    NULL, /* 517 */
+    NULL, /* 518 */
+    NULL, /* 519 */
+    NULL, /* 520 */
+    NULL, /* 521 */
+    NULL, /* 522 */
+    NULL, /* 523 */
+    NULL, /* 524 */
+    NULL, /* 525 */
+    NULL, /* 526 */
+    NULL, /* 527 */
+    NULL, /* 528 */
+    NULL, /* 529 */
+    NULL, /* 530 */
+    NULL, /* 531 */
+    NULL, /* 532 */
+    NULL, /* 533 */
+    NULL, /* 534 */
+    NULL, /* 535 */
+    NULL, /* 536 */
+    NULL, /* 537 */
+    NULL, /* 538 */
+    NULL, /* 539 */
+    NULL, /* 540 */
+    NULL, /* 541 */
+    NULL, /* 542 */
+    NULL, /* 543 */
+    NULL, /* 544 */
+    NULL, /* 545 */
+    NULL, /* 546 */
+    NULL, /* 547 */
+    NULL, /* 548 */
+    NULL, /* 549 */
+    NULL, /* 550 */
+    NULL, /* 551 */
+    NULL, /* 552 */
+    NULL, /* 553 */
+    Tcl_ChannelThreadActionProc, /* 554 */
 };
 
 /* !END!: Do not edit above this line. */
Index: mac/tclMacChan.c
===================================================================
RCS file: /cvsroot/tcl/tcl/mac/Attic/tclMacChan.c,v
retrieving revision 1.21
diff -w -u -r1.21 tclMacChan.c
--- mac/tclMacChan.c	3 Mar 2003 20:22:42 -0000	1.21
+++ mac/tclMacChan.c	27 Jan 2005 22:49:19 -0000
@@ -102,6 +102,8 @@
 			    long offset, int mode, int *errorCode));
 static void		FileSetupProc _ANSI_ARGS_((ClientData clientData,
 			    int flags));
+static void             FileThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
 static Tcl_Channel	OpenFileChannel _ANSI_ARGS_((CONST char *fileName, 
 			    int mode, int permissions, int *errorCodePtr));
 static int		StdIOBlockMode _ANSI_ARGS_((ClientData instanceData,
@@ -123,7 +125,7 @@
 
 static Tcl_ChannelType consoleChannelType = {
     "file",			/* Type name. */
-    (Tcl_ChannelTypeVersion)StdIOBlockMode,		/* Set blocking/nonblocking mode.*/
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     StdIOClose,			/* Close proc. */
     StdIOInput,			/* Input proc. */
     StdIOOutput,		/* Output proc. */
@@ -132,6 +134,12 @@
     NULL,			/* Get option proc. */
     CommonWatch,		/* Initialize notifier. */
     CommonGetHandle		/* Get OS handles out of channel. */
+    NULL,			/* close2proc. */
+    StdIOBlockMode,		/* Set blocking/nonblocking mode.*/
+    NULL,			/* flush proc. */
+    NULL,			/* handler proc. */
+    NULL,			/* wide seek proc. */
+    NULL,		        /* thread actions */
 };
 
 /*
@@ -140,8 +148,7 @@
 
 static Tcl_ChannelType fileChannelType = {
     "file",			/* Type name. */
-    (Tcl_ChannelTypeVersion)FileBlockMode,		/* Set blocking or
-                                 * non-blocking mode.*/
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     FileClose,			/* Close proc. */
     FileInput,			/* Input proc. */
     FileOutput,			/* Output proc. */
@@ -150,6 +157,12 @@
     NULL,			/* Get option proc. */
     CommonWatch,		/* Initialize notifier. */
     CommonGetHandle		/* Get OS handles out of channel. */
+    NULL,			/* close2proc. */
+    FileBlockMode,		/* Set blocking/nonblocking mode.*/
+    NULL,			/* flush proc. */
+    NULL,			/* handler proc. */
+    NULL,			/* wide seek proc. */
+    FileThreadActionProc,       /* thread actions */
 };
 
 
@@ -1212,10 +1225,9 @@
 /*
  *----------------------------------------------------------------------
  *
- * TclpCutFileChannel --
+ * FileThreadActionProc --
  *
- *	Remove any thread local refs to this channel. See
- *	Tcl_CutChannel for more info.
+ *	Insert or remove any thread local refs to this channel.
  *
  * Results:
  *	None.
@@ -1226,23 +1238,21 @@
  *----------------------------------------------------------------------
  */
 
-void
-TclpCutFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
+static void
+FileThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
 {
     ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileState *infoPtr;
+    FileState *infoPtr = (FileState *) instanceData;
+
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+	infoPtr->nextPtr = tsdPtr->firstFilePtr;
+	tsdPtr->firstFilePtr = infoPtr;
+    } else {
     FileState **nextPtrPtr;
     int removed = 0;
 
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    infoPtr = (FileState *) chanPtr->instanceData;
-
     for (nextPtrPtr = &(tsdPtr->firstFilePtr); (*nextPtrPtr) != NULL;
 	 nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
 	if ((*nextPtrPtr) == infoPtr) {
@@ -1258,43 +1268,8 @@
      * local data in each thread.
      */
 
-    if (!removed)
+	if (!removed) {
         panic("file info ptr not on thread channel list");
-
 }
-
-/*
- *----------------------------------------------------------------------
- *
- * TclpSpliceFileChannel --
- *
- *	Insert thread local ref for this channel.
- *	Tcl_SpliceChannel for more info.
- *
- * Results:
- *	None.
- *
- * Side effects:
- *	Changes thread local list of valid channels.
- *
- *----------------------------------------------------------------------
- */
-
-void
-TclpSpliceFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
-{
-    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileState *infoPtr;
-
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    infoPtr = (FileState *) chanPtr->instanceData;
-
-    infoPtr->nextPtr = tsdPtr->firstFilePtr;
-    tsdPtr->firstFilePtr = infoPtr;
+    }
 }
Index: tests/io.test
===================================================================
RCS file: /cvsroot/tcl/tcl/tests/io.test,v
retrieving revision 1.40.2.8
diff -w -u -r1.40.2.8 io.test
--- tests/io.test	11 Nov 2004 01:16:20 -0000	1.40.2.8
+++ tests/io.test	27 Jan 2005 22:49:19 -0000
@@ -1712,6 +1712,12 @@
     set f [open "|[list [interpreter] $path(script) [array get path]]" r]
     set c [gets $f]
     close $f
+    # Added delay to give Windows time to stop the spawned process and clean
+    # up its grip on the file test1. Added delete as proper test cleanup.
+    # The failing tests were 18.1 and 18.2 as first re-users of file "test1".
+    after 10000
+    file delete $path(script)
+    file delete $path(test1)
     set c
 } hello
 
Index: unix/tclUnixChan.c
===================================================================
RCS file: /cvsroot/tcl/tcl/unix/tclUnixChan.c,v
retrieving revision 1.42.2.4
diff -w -u -r1.42.2.4 tclUnixChan.c
--- unix/tclUnixChan.c	17 Nov 2004 02:52:25 -0000	1.42.2.4
+++ unix/tclUnixChan.c	27 Jan 2005 22:49:19 -0000
@@ -250,6 +250,10 @@
 			    int toWrite, int *errorCode));
 static int		FileSeekProc _ANSI_ARGS_((ClientData instanceData,
 			    long offset, int mode, int *errorCode));
+#ifdef DEPRECATED
+static void             FileThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
+#endif
 static Tcl_WideInt	FileWideSeekProc _ANSI_ARGS_((ClientData instanceData,
 			    Tcl_WideInt offset, int mode, int *errorCode));
 static void		FileWatchProc _ANSI_ARGS_((ClientData instanceData,
@@ -305,7 +309,7 @@
 
 static Tcl_ChannelType fileChannelType = {
     "file",			/* Type name. */
-    TCL_CHANNEL_VERSION_3,	/* v3 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     FileCloseProc,		/* Close proc. */
     FileInputProc,		/* Input proc. */
     FileOutputProc,		/* Output proc. */
@@ -319,6 +323,11 @@
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
     FileWideSeekProc,		/* wide seek proc. */
+#ifdef DEPRECATED
+    FileThreadActionProc,       /* thread actions */
+#else
+    NULL,
+#endif
 };
 
 #ifdef SUPPORTS_TTY
@@ -329,7 +338,7 @@
 
 static Tcl_ChannelType ttyChannelType = {
     "tty",			/* Type name. */
-    TCL_CHANNEL_VERSION_2,	/* v2 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     TtyCloseProc,		/* Close proc. */
     FileInputProc,		/* Input proc. */
 #if BAD_TIP35_FLUSH
@@ -346,6 +355,8 @@
     FileBlockModeProc,		/* Set blocking or non-blocking mode.*/
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
+    NULL,			/* wide seek proc. */
+    NULL,			/* thread action proc. */
 };
 #endif	/* SUPPORTS_TTY */
 
@@ -356,7 +367,7 @@
 
 static Tcl_ChannelType tcpChannelType = {
     "tcp",			/* Type name. */
-    TCL_CHANNEL_VERSION_2,	/* v2 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     TcpCloseProc,		/* Close proc. */
     TcpInputProc,		/* Input proc. */
     TcpOutputProc,		/* Output proc. */
@@ -369,6 +380,8 @@
     TcpBlockModeProc,		/* Set blocking or non-blocking mode.*/
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
+    NULL,			/* wide seek proc. */
+    NULL,			/* thread action proc. */
 };
 
 
@@ -1840,8 +1853,11 @@
 
 #ifdef DEPRECATED
     if (channelTypePtr == &fileChannelType) {
-        fsPtr->nextPtr = tsdPtr->firstFilePtr;
-        tsdPtr->firstFilePtr = fsPtr;
+        /* TIP #218. Removed the code inserting the new structure
+	 * into the global list. This is now handled in the thread
+	 * action callbacks, and only there.
+	 */
+        fsPtr->nextPtr = NULL;
     }
 #endif /* DEPRECATED */
     fsPtr->validMask = channelPermissions | TCL_EXCEPTION;
@@ -3281,13 +3297,13 @@
     return result;
 }
 
+#ifdef DEPRECATED
 /*
  *----------------------------------------------------------------------
  *
- * TclpCutFileChannel --
+ * FileThreadActionProc --
  *
- *	Remove any thread local refs to this channel. See
- *	Tcl_CutChannel for more info.
+ *	Insert or remove any thread local refs to this channel.
  *
  * Results:
  *	None.
@@ -3298,24 +3314,21 @@
  *----------------------------------------------------------------------
  */
 
-void
-TclpCutFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
+static void
+FileThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
 {
-#ifdef DEPRECATED
     ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileState *fsPtr;
+    FileState *fsPtr = (FileState *) instanceData;
+
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        fsPtr->nextPtr       = tsdPtr->firstFilePtr;
+	tsdPtr->firstFilePtr = fsPtr;
+    } else {
     FileState **nextPtrPtr;
     int removed = 0;
 
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    fsPtr = (FileState *) chanPtr->instanceData;
-
     for (nextPtrPtr = &(tsdPtr->firstFilePtr); (*nextPtrPtr) != NULL;
 	 nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
 	if ((*nextPtrPtr) == fsPtr) {
@@ -3326,51 +3339,15 @@
     }
 
     /*
-     * This could happen if the channel was created in one thread
-     * and then moved to another without updating the thread
-     * local data in each thread.
+	 * This could happen if the channel was created in one
+	 * thread and then moved to another without updating
+	 * the thread local data in each thread.
      */
 
-    if (!removed)
+	if (!removed) {
         panic("file info ptr not on thread channel list");
-
-#endif /* DEPRECATED */
 }
-
-/*
- *----------------------------------------------------------------------
- *
- * TclpSpliceFileChannel --
- *
- *	Insert thread local ref for this channel.
- *	Tcl_SpliceChannel for more info.
- *
- * Results:
- *	None.
- *
- * Side effects:
- *	Changes thread local list of valid channels.
- *
- *----------------------------------------------------------------------
- */
-
-void
-TclpSpliceFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
-{
-#ifdef DEPRECATED
-    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileState *fsPtr;
-
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    fsPtr = (FileState *) chanPtr->instanceData;
-
-    fsPtr->nextPtr = tsdPtr->firstFilePtr;
-    tsdPtr->firstFilePtr = fsPtr;
-#endif /* DEPRECATED */
 }
+}
+#endif /* DEPRECATED */
+
Index: unix/tclUnixPipe.c
===================================================================
RCS file: /cvsroot/tcl/tcl/unix/tclUnixPipe.c,v
retrieving revision 1.23.2.2
diff -w -u -r1.23.2.2 tclUnixPipe.c
--- unix/tclUnixPipe.c	8 Jun 2004 20:43:33 -0000	1.23.2.2
+++ unix/tclUnixPipe.c	27 Jan 2005 22:49:19 -0000
@@ -72,7 +72,7 @@
 
 static Tcl_ChannelType pipeChannelType = {
     "pipe",			/* Type name. */
-    TCL_CHANNEL_VERSION_2,	/* v2 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     PipeCloseProc,		/* Close proc. */
     PipeInputProc,		/* Input proc. */
     PipeOutputProc,		/* Output proc. */
@@ -85,6 +85,8 @@
     PipeBlockModeProc,		/* Set blocking or non-blocking mode.*/
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
+    NULL,                       /* wide seek proc */
+    NULL,                       /* thread action proc */
 };
 
 /*
Index: win/tclWinChan.c
===================================================================
RCS file: /cvsroot/tcl/tcl/win/tclWinChan.c,v
retrieving revision 1.30.2.2
diff -w -u -r1.30.2.2 tclWinChan.c
--- win/tclWinChan.c	19 Jan 2005 22:09:58 -0000	1.30.2.2
+++ win/tclWinChan.c	27 Jan 2005 22:49:19 -0000
@@ -98,6 +98,8 @@
 			    int flags));
 static void		FileWatchProc _ANSI_ARGS_((ClientData instanceData,
 		            int mask));
+static void             FileThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
 
 			    
 /*
@@ -106,7 +108,7 @@
 
 static Tcl_ChannelType fileChannelType = {
     "file",			/* Type name. */
-    TCL_CHANNEL_VERSION_3,	/* v3 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     FileCloseProc,		/* Close proc. */
     FileInputProc,		/* Input proc. */
     FileOutputProc,		/* Output proc. */
@@ -120,6 +122,7 @@
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
     FileWideSeekProc,		/* Wide seek proc. */
+    FileThreadActionProc,	/* Thread action proc. */
 };
 
 #if defined(HAVE_NO_SEH) && defined(TCL_MEM_DEBUG)
@@ -436,11 +439,11 @@
 	if (infoPtr == fileInfoPtr) {
             /*
              * This channel exists on the thread local list. It should
-             * have been removed by an earlier call to TclpCutFileChannel,
+             * have been removed by an earlier Thread Action call,
              * but do that now since just deallocating fileInfoPtr would
              * leave an deallocated pointer on the thread local list.
              */
-            TclpCutFileChannel(fileInfoPtr->channel);
+	    FileThreadActionProc(fileInfoPtr,TCL_CHANNEL_THREAD_REMOVE);
             break;
         }
     }
@@ -1319,8 +1322,11 @@
     }
 
     infoPtr = (FileInfo *) ckalloc((unsigned) sizeof(FileInfo));
-    infoPtr->nextPtr = tsdPtr->firstFilePtr;
-    tsdPtr->firstFilePtr = infoPtr;
+    /* TIP #218. Removed the code inserting the new structure
+     * into the global list. This is now handled in the thread
+     * action callbacks, and only there.
+     */
+    infoPtr->nextPtr = NULL;
     infoPtr->validMask = permissions;
     infoPtr->watchMask = 0;
     infoPtr->flags = appendMode;
@@ -1389,10 +1395,9 @@
 /*
  *----------------------------------------------------------------------
  *
- * TclpCutFileChannel --
+ * FileThreadActionProc --
  *
- *	Remove any thread local refs to this channel. See
- *	Tcl_CutChannel for more info.
+ *	Insert or remove any thread local refs to this channel.
  *
  * Results:
  *	None.
@@ -1403,23 +1408,21 @@
  *----------------------------------------------------------------------
  */
 
-void
-TclpCutFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
+static void
+FileThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
 {
     ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileInfo *infoPtr;
+    FileInfo *infoPtr = (FileInfo *) instanceData;
+
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        infoPtr->nextPtr = tsdPtr->firstFilePtr;
+	tsdPtr->firstFilePtr = infoPtr;
+    } else {
     FileInfo **nextPtrPtr;
     int removed = 0;
 
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    infoPtr = (FileInfo *) chanPtr->instanceData;
-
     for (nextPtrPtr = &(tsdPtr->firstFilePtr); (*nextPtrPtr) != NULL;
 	 nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
 	if ((*nextPtrPtr) == infoPtr) {
@@ -1435,43 +1438,8 @@
      * local data in each thread.
      */
 
-    if (!removed)
+	if (!removed) {
         panic("file info ptr not on thread channel list");
-
 }
-
-/*
- *----------------------------------------------------------------------
- *
- * TclpSpliceFileChannel --
- *
- *	Insert thread local ref for this channel.
- *	Tcl_SpliceChannel for more info.
- *
- * Results:
- *	None.
- *
- * Side effects:
- *	Changes thread local list of valid channels.
- *
- *----------------------------------------------------------------------
- */
-
-void
-TclpSpliceFileChannel(chan)
-    Tcl_Channel chan;			/* The channel being removed. Must
-                                         * not be referenced in any
-                                         * interpreter. */
-{
-    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-    Channel *chanPtr = (Channel *) chan;
-    FileInfo *infoPtr;
-
-    if (chanPtr->typePtr != &fileChannelType)
-        return;
-
-    infoPtr = (FileInfo *) chanPtr->instanceData;
-
-    infoPtr->nextPtr = tsdPtr->firstFilePtr;
-    tsdPtr->firstFilePtr = infoPtr;
+    }
 }
Index: win/tclWinConsole.c
===================================================================
RCS file: /cvsroot/tcl/tcl/win/tclWinConsole.c,v
retrieving revision 1.11
diff -w -u -r1.11 tclWinConsole.c
--- win/tclWinConsole.c	26 Nov 2002 22:41:58 -0000	1.11
+++ win/tclWinConsole.c	27 Jan 2005 22:49:19 -0000
@@ -148,7 +148,7 @@
 static void		ConsoleExitHandler(ClientData clientData);
 static int		ConsoleGetHandleProc(ClientData instanceData,
 			    int direction, ClientData *handlePtr);
-static ThreadSpecificData *ConsoleInit(void);
+static void             ConsoleInit(void);
 static int		ConsoleInputProc(ClientData instanceData, char *buf,
 			    int toRead, int *errorCode);
 static int		ConsoleOutputProc(ClientData instanceData,
@@ -160,6 +160,9 @@
 static void		ProcExitHandler(ClientData clientData);
 static int		WaitForRead(ConsoleInfo *infoPtr, int blocking);
 
+static void             ConsoleThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
+
 /*
  * This structure describes the channel type structure for command console
  * based IO.
@@ -167,7 +170,7 @@
 
 static Tcl_ChannelType consoleChannelType = {
     "console",			/* Type name. */
-    TCL_CHANNEL_VERSION_2,	/* v2 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     ConsoleCloseProc,		/* Close proc. */
     ConsoleInputProc,		/* Input proc. */
     ConsoleOutputProc,		/* Output proc. */
@@ -180,6 +183,8 @@
     ConsoleBlockModeProc,	/* Set blocking or non-blocking mode.*/
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
+    NULL,                       /* wide seek proc */
+    ConsoleThreadActionProc,    /* thread action proc */
 };
 
 /*
@@ -198,7 +203,7 @@
  *----------------------------------------------------------------------
  */
 
-static ThreadSpecificData *
+static void
 ConsoleInit()
 {
     ThreadSpecificData *tsdPtr;
@@ -224,7 +229,6 @@
 	Tcl_CreateEventSource(ConsoleSetupProc, ConsoleCheckProc, NULL);
 	Tcl_CreateThreadExitHandler(ConsoleExitHandler, NULL);
     }
-    return tsdPtr;
 }
 
 /*
@@ -1170,7 +1174,10 @@
 	 */
 
 	Tcl_MutexLock(&consoleMutex);
+	if (infoPtr->threadId != NULL) {
+	    /* TIP #218. When in flight ignore the event, no one will receive it anyway */
 	Tcl_ThreadAlert(infoPtr->threadId);
+	}
 	Tcl_MutexUnlock(&consoleMutex);
     }
 
@@ -1256,7 +1263,10 @@
 	 */
 
 	Tcl_MutexLock(&consoleMutex);
+	if (infoPtr->threadId != NULL) {
+	    /* TIP #218. When in flight ignore the event, no one will receive it anyway */
 	Tcl_ThreadAlert(infoPtr->threadId);
+	}
 	Tcl_MutexUnlock(&consoleMutex);
     }
 
@@ -1291,10 +1301,9 @@
 {
     char encoding[4 + TCL_INTEGER_SPACE];
     ConsoleInfo *infoPtr;
-    ThreadSpecificData *tsdPtr;
     DWORD id, modes;
 
-    tsdPtr = ConsoleInit();
+    ConsoleInit();
 
     /*
      * See if a channel with this handle already exists.
@@ -1305,9 +1314,12 @@
 
     infoPtr->validMask = permissions;
     infoPtr->handle = handle;
+    infoPtr->channel = (Tcl_Channel) NULL;
 
     wsprintfA(encoding, "cp%d", GetConsoleCP());
 
+    infoPtr->threadId = Tcl_GetCurrentThread();
+
     /*
      * Use the pointer for the name of the result channel.
      * This keeps the channel names unique, since some may share
@@ -1319,8 +1331,6 @@
     infoPtr->channel = Tcl_CreateChannel(&consoleChannelType, channelName,
             (ClientData) infoPtr, permissions);
 
-    infoPtr->threadId = Tcl_GetCurrentThread();
-
     if (permissions & TCL_READABLE) {
 	/*
 	 * Make sure the console input buffer is ready for only character
@@ -1361,3 +1371,51 @@
 
     return infoPtr->channel;
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ConsoleThreadActionProc --
+ *
+ *	Insert or remove any thread local refs to this channel.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes thread local list of valid channels.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+ConsoleThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
+{
+    ConsoleInfo *infoPtr = (ConsoleInfo *) instanceData;
+
+    /* We do not access firstConsolePtr in the thread structures. This is
+     * not for all serials managed by the thread, but only those we are
+     * watching. Removal of the filevent handlers before transfer thus
+     * takes care of this structure.
+     */
+
+    Tcl_MutexLock(&consoleMutex);
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        /* We can't copy the thread information from the channel when
+	 * the channel is created. At this time the channel back
+	 * pointer has not been set yet. However in that case the
+	 * threadId has already been set by TclpCreateCommandChannel
+	 * itself, so the structure is still good.
+	 */
+
+        ConsoleInit ();
+        if (infoPtr->channel != NULL) {
+	    infoPtr->threadId = Tcl_GetChannelThread (infoPtr->channel);
+	}
+    } else {
+	infoPtr->threadId = NULL;
+    }
+    Tcl_MutexUnlock(&consoleMutex);
+}
Index: win/tclWinPipe.c
===================================================================
RCS file: /cvsroot/tcl/tcl/win/tclWinPipe.c,v
retrieving revision 1.33.2.8
diff -w -u -r1.33.2.8 tclWinPipe.c
--- win/tclWinPipe.c	10 May 2004 20:55:44 -0000	1.33.2.8
+++ win/tclWinPipe.c	27 Jan 2005 22:49:19 -0000
@@ -205,6 +205,9 @@
 static int		TempFileName(WCHAR name[MAX_PATH]);
 static int		WaitForRead(PipeInfo *infoPtr, int blocking);
 
+static void             PipeThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
+
 /*
  * This structure describes the channel type structure for command pipe
  * based IO.
@@ -212,7 +215,7 @@
 
 static Tcl_ChannelType pipeChannelType = {
     "pipe",			/* Type name. */
-    TCL_CHANNEL_VERSION_2,	/* v2 channel */
+    TCL_CHANNEL_VERSION_4,	/* v4 channel */
     TCL_CLOSE2PROC,		/* Close proc. */
     PipeInputProc,		/* Input proc. */
     PipeOutputProc,		/* Output proc. */
@@ -225,6 +228,8 @@
     PipeBlockModeProc,		/* Set blocking or non-blocking mode.*/
     NULL,			/* flush proc. */
     NULL,			/* handler proc. */
+    NULL,                       /* wide seek proc */
+    PipeThreadActionProc,       /* thread action proc */
 };
 
 /*
@@ -1689,6 +1694,7 @@
     infoPtr->writeBuf = 0;
     infoPtr->writeBufLen = 0;
     infoPtr->writeError = 0;
+    infoPtr->channel = (Tcl_Channel) NULL;
 
     /*
      * Use one of the fds associated with the channel as the
@@ -2931,7 +2937,10 @@
 	 */
 
 	Tcl_MutexLock(&pipeMutex);
+	if (infoPtr->threadId != NULL) {
+	    /* TIP #218. When in flight ignore the event, no one will receive it anyway */
 	Tcl_ThreadAlert(infoPtr->threadId);
+	}
 	Tcl_MutexUnlock(&pipeMutex);
     }
 
@@ -3019,10 +3028,60 @@
 	 */
 
 	Tcl_MutexLock(&pipeMutex);
+	if (infoPtr->threadId != NULL) {
+	    /* TIP #218. When in flight ignore the event, no one will receive it anyway */
 	Tcl_ThreadAlert(infoPtr->threadId);
+	}
 	Tcl_MutexUnlock(&pipeMutex);
     }
 
     return 0;
 }
 
+/*
+ *----------------------------------------------------------------------
+ *
+ * PipeThreadActionProc --
+ *
+ *	Insert or remove any thread local refs to this channel.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes thread local list of valid channels.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+PipeThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
+{
+    PipeInfo *infoPtr = (PipeInfo *) instanceData;
+
+    /* We do not access firstPipePtr in the thread structures. This is
+     * not for all pipes managed by the thread, but only those we are
+     * watching. Removal of the filevent handlers before transfer thus
+     * takes care of this structure.
+     */
+
+    Tcl_MutexLock(&pipeMutex);
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        /* We can't copy the thread information from the channel when
+	 * the channel is created. At this time the channel back
+	 * pointer has not been set yet. However in that case the
+	 * threadId has already been set by TclpCreateCommandChannel
+	 * itself, so the structure is still good.
+	 */
+
+        PipeInit ();
+        if (infoPtr->channel != NULL) {
+	    infoPtr->threadId = Tcl_GetChannelThread (infoPtr->channel);
+	}
+    } else {
+	infoPtr->threadId = NULL;
+    }
+    Tcl_MutexUnlock(&pipeMutex);
+}
Index: win/tclWinSerial.c
===================================================================
RCS file: /cvsroot/tcl/tcl/win/tclWinSerial.c,v
retrieving revision 1.25.2.1
diff -w -u -r1.25.2.1 tclWinSerial.c
--- win/tclWinSerial.c	11 May 2003 00:31:41 -0000	1.25.2.1
+++ win/tclWinSerial.c	27 Jan 2005 22:49:19 -0000
@@ -190,6 +190,9 @@
                 CONST char *value));
 static DWORD WINAPI     SerialWriterThread(LPVOID arg);
 
+static void             SerialThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
+
 /*
  * This structure describes the channel type structure for command serial
  * based IO.
@@ -197,7 +200,7 @@
 
 static Tcl_ChannelType serialChannelType = {
     "serial",                   /* Type name. */
-    TCL_CHANNEL_VERSION_2,      /* v2 channel */
+    TCL_CHANNEL_VERSION_4,      /* v4 channel */
     SerialCloseProc,            /* Close proc. */
     SerialInputProc,            /* Input proc. */
     SerialOutputProc,           /* Output proc. */
@@ -210,6 +213,8 @@
     SerialBlockProc,            /* Set blocking or non-blocking mode.*/
     NULL,                       /* flush proc. */
     NULL,                       /* handler proc. */
+    NULL,                       /* wide seek proc */
+    SerialThreadActionProc,     /* thread action proc */
 };
 
 /*
@@ -1346,7 +1351,10 @@
          */
 
         Tcl_MutexLock(&serialMutex);
+	if (infoPtr->threadId != NULL) {
+	    /* TIP #218. When in flight ignore the event, no one will receive it anyway */
         Tcl_ThreadAlert(infoPtr->threadId);
+	}
         Tcl_MutexUnlock(&serialMutex);
     }
 
@@ -1419,16 +1427,25 @@
     int permissions;
 {
     SerialInfo *infoPtr;
-    ThreadSpecificData *tsdPtr;
     DWORD id;
 
-    tsdPtr = SerialInit();
+    SerialInit();
 
     infoPtr = (SerialInfo *) ckalloc((unsigned) sizeof(SerialInfo));
     memset(infoPtr, 0, sizeof(SerialInfo));
 
     infoPtr->validMask = permissions;
     infoPtr->handle = handle;
+    infoPtr->channel       = (Tcl_Channel) NULL;
+    infoPtr->readable      = 0; 
+    infoPtr->writable      = 1;
+    infoPtr->toWrite       = infoPtr->writeQueue = 0;
+    infoPtr->blockTime     = SERIAL_DEFAULT_BLOCKTIME;
+    infoPtr->lastEventTime = 0;
+    infoPtr->lastError     = infoPtr->error = 0;
+    infoPtr->threadId      = Tcl_GetCurrentThread();
+    infoPtr->sysBufRead    = 4096;
+    infoPtr->sysBufWrite   = 4096;
 
     /*
      * Use the pointer to keep the channel names unique, in case
@@ -1440,14 +1457,6 @@
     infoPtr->channel = Tcl_CreateChannel(&serialChannelType, channelName,
             (ClientData) infoPtr, permissions);
 
-    infoPtr->readable = 0; 
-    infoPtr->writable = 1;
-    infoPtr->toWrite = infoPtr->writeQueue = 0;
-    infoPtr->blockTime = SERIAL_DEFAULT_BLOCKTIME;
-    infoPtr->lastEventTime = 0;
-    infoPtr->lastError = infoPtr->error = 0;
-    infoPtr->threadId = Tcl_GetCurrentThread();
-    infoPtr->sysBufRead = infoPtr->sysBufWrite = 4096;
 
     SetupComm(handle, infoPtr->sysBufRead, infoPtr->sysBufWrite);
     PurgeComm(handle, PURGE_TXABORT | PURGE_RXABORT | PURGE_TXCLEAR 
@@ -2107,3 +2116,51 @@
             "mode pollinterval lasterror queue sysbuffer ttystatus xchar");
     }
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * SerialThreadActionProc --
+ *
+ *	Insert or remove any thread local refs to this channel.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes thread local list of valid channels.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+SerialThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
+{
+    SerialInfo *infoPtr = (SerialInfo *) instanceData;
+
+    /* We do not access firstSerialPtr in the thread structures. This is
+     * not for all serials managed by the thread, but only those we are
+     * watching. Removal of the filevent handlers before transfer thus
+     * takes care of this structure.
+     */
+
+    Tcl_MutexLock(&serialMutex);
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        /* We can't copy the thread information from the channel when
+	 * the channel is created. At this time the channel back
+	 * pointer has not been set yet. However in that case the
+	 * threadId has already been set by TclpCreateCommandChannel
+	 * itself, so the structure is still good.
+	 */
+
+        SerialInit ();
+        if (infoPtr->channel != NULL) {
+	    infoPtr->threadId = Tcl_GetChannelThread (infoPtr->channel);
+	}
+    } else {
+	infoPtr->threadId = NULL;
+    }
+    Tcl_MutexUnlock(&serialMutex);
+}
Index: win/tclWinSock.c
===================================================================
RCS file: /cvsroot/tcl/tcl/win/tclWinSock.c,v
retrieving revision 1.36.2.2
diff -w -u -r1.36.2.2 tclWinSock.c
--- win/tclWinSock.c	6 May 2004 01:03:56 -0000	1.36.2.2
+++ win/tclWinSock.c	27 Jan 2005 22:49:19 -0000
@@ -265,6 +265,10 @@
 				int *errorCodePtr));
 static DWORD WINAPI	    SocketThread _ANSI_ARGS_((LPVOID arg));
 
+static void             TcpThreadActionProc _ANSI_ARGS_ ((
+			   ClientData instanceData, int action));
+
+
 /*
  * This structure describes the channel type structure for TCP socket
  * based IO.
@@ -272,7 +276,7 @@
 
 static Tcl_ChannelType tcpChannelType = {
     "tcp",		    /* Type name. */
-    TCL_CHANNEL_VERSION_2,  /* v2 channel */
+    TCL_CHANNEL_VERSION_4,  /* v4 channel */
     TcpCloseProc,	    /* Close proc. */
     TcpInputProc,	    /* Input proc. */
     TcpOutputProc,	    /* Output proc. */
@@ -285,6 +289,8 @@
     TcpBlockProc,	    /* Set socket into (non-)blocking mode. */
     NULL,		    /* flush proc. */
     NULL,		    /* handler proc. */
+    NULL,                   /* wide seek proc */
+    TcpThreadActionProc,    /* thread action proc */
 };
 
 
@@ -970,7 +976,7 @@
     Tcl_Interp *interp;		/* Unused. */
 {
     SocketInfo *infoPtr = (SocketInfo *) instanceData;
-    SocketInfo **nextPtrPtr;
+    /* TIP #218 */
     int errorCode = 0;
     ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
 
@@ -995,20 +1001,12 @@
         }
     }
 
-    /*
-     * Remove the socket from socketList.
+    /* TIP #218. Removed the code removing the structure
+     * from the global socket list. This is now done by
+     * the thread action callbacks, and only there. This
+     * happens before this code is called. We can free
+     * without fear of damanging the list.
      */
-
-    WaitForSingleObject(tsdPtr->socketListLock, INFINITE);
-    for (nextPtrPtr = &(tsdPtr->socketList); (*nextPtrPtr) != NULL;
-	 nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
-	if ((*nextPtrPtr) == infoPtr) {
-	    (*nextPtrPtr) = infoPtr->nextPtr;
-	    break;
-	}
-    }
-    
-    SetEvent(tsdPtr->socketListLock);
     ckfree((char *) infoPtr);
     return errorCode;
 }
@@ -1025,7 +1023,7 @@
  *	Returns a newly allocated SocketInfo.
  *
  * Side effects:
- *	Adds the socket to the global socket list.
+ *	None, except for allocation of memory.
  *
  *----------------------------------------------------------------------
  */
@@ -1047,10 +1045,11 @@
     infoPtr->acceptProc = NULL;
     infoPtr->lastError = 0;
 
-    WaitForSingleObject(tsdPtr->socketListLock, INFINITE);
-    infoPtr->nextPtr = tsdPtr->socketList;
-    tsdPtr->socketList = infoPtr;
-    SetEvent(tsdPtr->socketListLock);
+    /* TIP #218. Removed the code inserting the new structure
+     * into the global list. This is now handled in the thread
+     * action callbacks, and only there.
+     */
+    infoPtr->nextPtr = NULL;
     
     return infoPtr;
 }
@@ -1067,7 +1066,7 @@
  *	Returns a new SocketInfo, or NULL with an error in interp.
  *
  * Side effects:
- *	Adds a new socket to the socketList.
+ *	None, except for allocation of memory.
  *
  *----------------------------------------------------------------------
  */
@@ -2660,4 +2659,84 @@
     return winSock.getservbyname(name, proto);
 }
 
+/*
+ *----------------------------------------------------------------------
+ *
+ * TcpThreadActionProc --
+ *
+ *	Insert or remove any thread local refs to this channel.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Changes thread local list of valid channels.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+TcpThreadActionProc (instanceData, action)
+     ClientData instanceData;
+     int action;
+{
+    ThreadSpecificData *tsdPtr;
+    SocketInfo *infoPtr = (SocketInfo *) instanceData;
+    int      notifyCmd;
+
+    if (action == TCL_CHANNEL_THREAD_INSERT) {
+        /*
+	 * Ensure that socket subsystem is initialized in this thread, or
+	 * else sockets will not work.
+	 */
+
+        Tcl_MutexLock(&socketMutex);
+	InitSockets();
+	Tcl_MutexUnlock(&socketMutex);
+
+	tsdPtr = TCL_TSD_INIT(&dataKey);
+
+	WaitForSingleObject(tsdPtr->socketListLock, INFINITE);
+	infoPtr->nextPtr = tsdPtr->socketList;
+	tsdPtr->socketList = infoPtr;
+	SetEvent(tsdPtr->socketListLock);
+
+	notifyCmd = SELECT;
+    } else {
+        SocketInfo **nextPtrPtr;
+	int removed = 0;
+
+	tsdPtr  = TCL_TSD_INIT(&dataKey);
+
+	/* TIP #218, Bugfix: All access to socketList has to be protected by the lock */
+	WaitForSingleObject(tsdPtr->socketListLock, INFINITE);
+	for (nextPtrPtr = &(tsdPtr->socketList); (*nextPtrPtr) != NULL;
+	     nextPtrPtr = &((*nextPtrPtr)->nextPtr)) {
+	    if ((*nextPtrPtr) == infoPtr) {
+	        (*nextPtrPtr) = infoPtr->nextPtr;
+		removed = 1;
+		break;
+	    }
+	}
+	SetEvent(tsdPtr->socketListLock);
+
+	/*
+	 * This could happen if the channel was created in one thread
+	 * and then moved to another without updating the thread
+	 * local data in each thread.
+	 */
 
+	if (!removed) {
+	    Tcl_Panic("file info ptr not on thread channel list");
+	}
+
+	notifyCmd = UNSELECT;
+    }
+
+    /*
+     * Ensure that, or stop, notifications for the socket occur in this thread.
+     */
+
+    SendMessage(tsdPtr->hwnd, SOCKET_SELECT,
+		(WPARAM) notifyCmd, (LPARAM) infoPtr);
+}
