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, 7 insertions, 2 deletions

diff --git a/unix/Makefile.in b/unix/Makefile.in
index df69f9c..c28fcb7 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -5,7 +5,7 @@
 # "autoconf" program (constructs like "@foo@" will get replaced in the
 # actual Makefile.
 #
-# RCS: @(#) $Id: Makefile.in,v 1.63 2000/04/25 20:58:48 hobbs Exp $
+# RCS: @(#) $Id: Makefile.in,v 1.64 2000/05/02 22:02:36 kupries Exp $
 
 VERSION 		= @TCL_VERSION@
 
@@ -274,6 +274,7 @@ GENERIC_OBJS = regcomp.o regexec.o regfree.o regerror.o tclAlloc.o \
 	tclResolve.o tclResult.o tclScan.o tclStringObj.o tclThread.o \
 	tclStubInit.o tclStubLib.o tclTimer.o tclUtf.o tclUtil.o tclVar.o
 
+
 STUB_LIB_OBJS = tclStubLib.o ${COMPAT_OBJS}
 
 OBJS = ${GENERIC_OBJS} ${UNIX_OBJS} ${NOTIFY_OBJS} ${COMPAT_OBJS} @DL_OBJS@
@@ -352,6 +353,7 @@ GENERIC_SRCS = \
 	$(GENERIC_DIR)/tclTestObj.c \
 	$(GENERIC_DIR)/tclTestProcBodyObj.c \
 	$(GENERIC_DIR)/tclThread.c \
+	$(GENERIC_DIR)/tclThreadJoin.c \
 	$(GENERIC_DIR)/tclTimer.c \
 	$(GENERIC_DIR)/tclUtil.c \
 	$(GENERIC_DIR)/tclVar.c
@@ -473,7 +475,7 @@ topDirName:
 gendate:
 	yacc -l $(GENERIC_DIR)/tclGetDate.y
 	sed -e 's/yy/TclDate/g' -e '/^#include <values.h>/d' \
-	    -e 's?SCCSID?RCS: @(#) $$Id: Makefile.in,v 1.63 2000/04/25 20:58:48 hobbs Exp $$?' \
+	    -e 's?SCCSID?RCS: @(#) $$Id: Makefile.in,v 1.64 2000/05/02 22:02:36 kupries Exp $$?' \
 	    -e '/#ifdef __STDC__/,/#endif/d' -e '/TclDateerrlab:/d' \
 	    -e '/TclDatenewstate:/d' -e '/#pragma/d' \
 	    -e '/#include <inttypes.h>/d' -e 's/const /CONST /g' \
@@ -908,6 +910,9 @@ tclTimer.o: $(GENERIC_DIR)/tclTimer.c
 tclThread.o: $(GENERIC_DIR)/tclThread.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclThread.c
 
+tclThreadJoin.o: $(GENERIC_DIR)/tclThreadJoin.c
+	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclThreadJoin.c
+
 tclThreadTest.o: $(GENERIC_DIR)/tclThreadTest.c
 	$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tclThreadTest.c