2002-04-17 Jeff Johnston <jjohnstn@redhat.com>

        *  libc/include/time.h (tzset, _tzset_r): Added prototypes.
        (strptime): Moved prototype to be within !__STRICT_ANSI__.
        (_tzname, _daylight, _timezone): No long __CYGWIN__ only.
        (tzname): Defined for all platforms.
        (daylight, timezone): Defined only for CYGWIN.
        *  libc/sys/linux/machine/i386/crt0.c: Add call to tzset() after
        environment set up.
        * libc/stdlib/setenv_r.c (_setenv_r): Call tzset() if the TZ
        environment variable is set.
        *  libc/time/Makefile.am: Add support for tzset.c, tzlock.c, and
        tzset_r.c.
        *  libc/time/Makefile.in: Regenerated.
        *  libc/time/gmtime.c (gmtime): Changed to call gmtime_r.
        *  libc/time/gmtime_r.c (gmtime_r): Changed to call _mktm_r.
        *  libc/time/lcltime_r.c (lcltime_r): Ditto.
        *  libc/time/local.h: New local header file.
        *  libc/time/mktime.c (mktime): Add timezone support.
        *  libc/time/mktm_r.c: New file which is the common engine
        for gmtime_r and lcltime_r.  This code has timezone support.
        *  libc/time/strftime.c (strftime): Add %Z timezone support.
        *  libc/time/tzlock.c: New file containing timezone lock stubs.
        *  libc/time/tzset.c: New file containing tzset() routine.
        *  libc/time/tzset_r.c: New file containing _tzset_r and
        internal routine for calculating timezone changes for specified year.

1 files changed, 44 insertions, 0 deletions

diff --git a/newlib/libc/time/tzlock.c b/newlib/libc/time/tzlock.c
new file mode 100644
index 000000000..66fa1c366
--- /dev/null
+++ b/newlib/libc/time/tzlock.c
@@ -0,0 +1,44 @@
+/*
+FUNCTION
+<<__tz_lock>>, <<__tz_unlock>>--lock time zone global variables
+
+INDEX
+	__tz_lock
+INDEX
+	__tz_unlock
+
+ANSI_SYNOPSIS
+	#include "local.h"
+	void __tz_lock (void);
+	void __tz_unlock (void);
+
+TRAD_SYNOPSIS
+	void __tz_lock();
+	void __tz_unlock();
+
+DESCRIPTION
+The <<tzset>> facility functions call these functions when they need
+to ensure the values of global variables.  The version of these routines supplied
+in the library do not do anything.  If multiple threads of execution
+can call the time functions and give up scheduling in the middle, then you
+you need to define your own versions of these functions in order to
+safely lock the time zone variables during a call.  If you do not, the results
+of <<localtime>>, <<mktime>>, <<ctime>>, and <<strftime>> are undefined.
+
+The lock <<__tz_lock>> may not be called recursively; that is,
+a call <<__tz_lock>> will always lock all subsequent <<__tz_lock>> calls
+until the corresponding <<__tz_unlock>> call on the same thread is made.
+*/
+
+#include <_ansi.h>
+#include "local.h"
+
+_VOID
+_DEFUN_VOID (__tz_lock)
+{
+}
+
+_VOID
+_DEFUN_VOID (__tz_unlock)
+{
+}