2000-05-02 Andreas Kupries <a.kupries@westend.com>

	* Overall changes:
	  (1) Implementation of joinable threads for all platforms.
	  (2) Additional API's for channels. Required to allow the
	  thread extension to move channels between threads.

	* generic/tcl.decls (lines 1360f): Added Tcl_JoinThread,
	  Tcl_IsChannelShared, Tcl_IsChannelRegistered, Tcl_CutChannel,
	  Tcl_SpliceChannel, Tcl_IsChannelExisting and
	  Tcl_ClearChannelHandlers (slots 394 to 400).

	* generic/tclIO.c: Implemented Tcl_IsChannelRegistered,
 	  Tcl_IsChannelShared, Tcl_CutChannel, Tcl_SpliceChannel,
 	  Tcl_IsChannelExisting and Tcl_ClearChannelHandlers.
	  Tcl_CutChannel uses code from CloseChannel. Replaced this code
 	  by a call to Tcl_CutChannel.  Replaced several code fragments
 	  adding channels to the channel list with calls to
 	  Tcl_SpliceChannel. Removed now unused variables from
 	  CloseChannel and Tcl_UnstackChannel.  Tcl_ClearChannelHandlers
 	  uses code from Tcl_Close. Replaced this code by a call to
 	  Tcl_ClearChannelHandlers. Removed now unused variables from
 	  Tcl_Close. Added the subcommands 'cut', 'forgetch', 'splice' and
 	  'isshared' to the test code
	  (TclTestChannelCmd).

	* unix/tclUnixThread.c: Implemented Tcl_JoinThread using the
	  pthread-functionality.

	* win/tclWinThrd.c: Fixed several small typos in comments.
	  Implemented Tcl_JoinThread using a platform independent
	  emulation layer (see generic/tclThreadJoin.c below). Added
	  'joinLock' to serialize Tcl_CreateThread and TclpExitThread to
	  prevent a race for joinable threads.

	* mac/tclMacThrd.c: Implemented Tcl_JoinThread using a platform
	  independent emulation layer (see generic/tclThreadJoin.c
	  below). Due to the cooperative nature of threading on this
	  platform the race mentioned above is not present.

	* generic/tclThreadJoin.c: New file. Contains a platform
	  independent emulation layer helping in the implementation of
	  joinable threads for the win and mac platforms.

	* generic/tclInt.h: Added declarations for TclJoinThread,
	  TclRememberJoinableThread and TclSignalExitThread. These
	  procedures define the API of the emulation layer for joinable
	  threads (see generic/tclThreadJoin.c above).

	* win/Makefile.in:
	* win/makefile.vc: Added generic/tclTheadJoin.o to the rules.

	* mac/: I don't know to which file generic/tclTheadJoin.o has to
	  be added to so that it compiles. Sorry.

	* unix/tclUnixChan.c: #ifdef'd the thread-local list of file
 	  channels as it prevents us from transfering channels. To restore
 	  this we may need an extended interface to drivers in the
 	  future. Target: 9.0. Found while testing the new transfer of
 	  channels. The information in this list for a channel was left
 	  behind and then crashed the system during finalization.

	* generic/tclThreadTest.c: Added -joinable flag to 'testthread
	  create'. Added subcommand 'testthread join'.

	* doc/CrtChannel.3: Added documentation for Tcl_IsChannelRegistered,
 	  Tcl_IsChannelShared, Tcl_CutChannel, Tcl_SpliceChannel,
	  Tcl_IsChannelExisting and Tcl_ClearChannelHandlers.

	* doc/Thread.3: Added documentation for Tcl_JoinThread.

	* tests/thread.test: Added tests for joining of threads.

1 files changed, 23 insertions, 1 deletions

diff --git a/generic/tcl.decls b/generic/tcl.decls
index 9d75c87..1f09cfa 100644
--- a/generic/tcl.decls
+++ b/generic/tcl.decls
@@ -10,7 +10,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 # 
-# RCS: @(#) $Id: tcl.decls,v 1.33 2000/04/09 16:04:17 kupries Exp $
+# RCS: @(#) $Id: tcl.decls,v 1.34 2000/05/02 22:02:33 kupries Exp $
 
 library tcl
 
@@ -1357,6 +1357,28 @@ declare 393 generic {
     int Tcl_CreateThread (Tcl_ThreadId *idPtr, Tcl_ThreadCreateProc proc, \
 	    ClientData clientData, int stackSize, int flags)
 }
+declare 394 generic {
+    int Tcl_JoinThread (Tcl_ThreadId id, int* result)
+}
+declare 395 generic {
+    int Tcl_IsChannelShared (Tcl_Channel channel)
+}
+declare 396 generic {
+    int Tcl_IsChannelRegistered (Tcl_Interp* interp, Tcl_Channel channel)
+}
+declare 397 generic {
+    void Tcl_CutChannel (Tcl_Channel channel)
+}
+declare 398 generic {
+    void Tcl_SpliceChannel (Tcl_Channel channel)
+}
+declare 399 generic {
+    void Tcl_ClearChannelHandlers (Tcl_Channel channel)
+}
+declare 400 generic {
+    int Tcl_IsChannelExisting (CONST char* channelName)
+}
+
 
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