2004-05-14 Kevin B. Kenny <kennykb@acm.org>

	* generic/tclInt.decls:      Promoted TclpLocaltime and TclpGmtime
	* generic/tclIntDecls.h:     from Unix-specific stubs to the generic
	* generic/tclIntPlatDecls.h: internal Stubs table.  Reran 'genstubs'
	* generic/tclStubInit.c:
	* unix/tclUnixPort.h:

	* generic/tclClock.c: Changed a buggy 'GMT' timezone specification
	                      to the correct 'GMT0'. [Bug #922848]
	
	* unix/tclUnixThrd.c: Moved TclpGmtime and TclpLocaltime to
	                      unix/tclUnixTime.c where they belong.

	* unix/tclUnixTime.c (TclpGmtime, TclpLocaltime, TclpGetTimeZone,
	                      ThreadSafeGMTime [removed],
	                      ThreadSafeLocalTime [removed],
	                      SetTZIfNecessary, CleanupMemory):
	    Restructured to make sure that the same mutex protects
	    all calls to localtime, gmtime, and tzset.  Added a check
	    in front of those calls to make sure that the TZ env var
	    hasn't changed since the last call to tzset, and repeat
	    tzset if necessary. [Bug #942078]  Removed a buggy test
	    of the Daylight Saving Time information in 'gettimeofday'
	    in favor of applying 'localtime' to a known value.
	    [Bug #922848]

	* tests/clock.test (clock-3.14): Added test to make sure that
	    changes to $env(TZ) take effect immediately.
	
	* win/tclWinTime.c (TclpLocaltime, TclpGmtime):
	    Added porting layer for 'localtime' and 'gmtime' calls.

1 files changed, 23 insertions, 1 deletions

diff --git a/tests/clock.test b/tests/clock.test
index 3b2ad27..72c254e 100644
--- a/tests/clock.test
+++ b/tests/clock.test
@@ -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: clock.test,v 1.22.2.1 2003/04/12 20:11:34 kennykb Exp $
+# RCS: @(#) $Id: clock.test,v 1.22.2.2 2004/05/14 21:41:11 kennykb Exp $
 
 set env(LC_TIME) POSIX
 
@@ -129,6 +129,28 @@ test clock-3.13 {clock format with non-ASCII character in the format string} {
     set res
 } "\u00c4"
 
+# Bug 942078
+
+test clock-3.14 {change of time zone} -setup {
+    catch { unset oldTZ }
+    if { [info exists env(TZ)] } {
+	set oldTZ $env(TZ)
+    }
+} -body {
+    set env(TZ) PST8PDT
+    set s [clock format 0 -format %H%M]
+    set env(TZ) GMT0
+    append s -[clock format 0 -format %H%M]
+} -cleanup {
+    if { [info exists oldTZ] } {
+	set env(TZ) $oldTZ
+	unset oldTZ
+    } else {
+	unset env(TZ)
+    }
+} -result {1600-0000}
+    
+
 # clock scan
 test clock-4.1 {clock scan tests} {
     list [catch {clock scan} msg] $msg