Add new function krb5_boolean krb5_is_thread_safe(void) to library.

  This function simply reports whether or not ENABLE_THREADS was specified
  at compile time.  It is meant to be used by applications which need to
  know whether or not multithread libraries must be initialized OR
  whether or not calls to Kerberos library functions from multi-threaded
  applications must be protected by an application global mutex.

ticket: new
tags: pullup

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17003 dc483132-0cff-0310-8789-dd5450dbe970

3 files changed, 47 insertions, 0 deletions

diff --git a/src/lib/krb5/os/ChangeLog b/src/lib/krb5/os/ChangeLog
index 1c0876503..00b7cb835 100644
--- a/src/lib/krb5/os/ChangeLog
+++ b/src/lib/krb5/os/ChangeLog
@@ -1,3 +1,7 @@
+2005-01-03  Jeffrey Altman <jaltman@mit.edu>
+
+        * thread_safe.c: (new file) krb5_is_thread_safe()
+
 2004-12-08  Ken Raeburn  <raeburn@mit.edu>
 
 	* accessor.c (krb5int_accessor): Set new field use_dns_kdc.
diff --git a/src/lib/krb5/os/Makefile.in b/src/lib/krb5/os/Makefile.in
index a971ba211..ade99dd90 100644
--- a/src/lib/krb5/os/Makefile.in
+++ b/src/lib/krb5/os/Makefile.in
@@ -49,6 +49,7 @@ STLIBOBJS= \
 	send524.o	\
 	sendto_kdc.o	\
 	sn2princ.o	\
+        thread_safe.o   \
 	timeofday.o	\
 	toffset.o	\
 	unlck_file.o	\
@@ -94,6 +95,7 @@ OBJS= \
 	$(OUTPRE)send524.$(OBJEXT)	\
 	$(OUTPRE)sendto_kdc.$(OBJEXT)	\
 	$(OUTPRE)sn2princ.$(OBJEXT)	\
+        $(OUTPRE)thread_safe.$(OBJEXT)  \
 	$(OUTPRE)timeofday.$(OBJEXT)	\
 	$(OUTPRE)toffset.$(OBJEXT)	\
 	$(OUTPRE)unlck_file.$(OBJEXT)	\
@@ -139,6 +141,7 @@ SRCS= \
 	$(srcdir)/send524.c	\
 	$(srcdir)/sendto_kdc.c	\
 	$(srcdir)/sn2princ.c	\
+        $(srcdir)/thread_safe.c \
 	$(srcdir)/timeofday.c	\
 	$(srcdir)/toffset.c	\
 	$(srcdir)/unlck_file.c	\
diff --git a/src/lib/krb5/os/thread_safe.c b/src/lib/krb5/os/thread_safe.c
new file mode 100644
index 000000000..faac234f9
--- /dev/null
+++ b/src/lib/krb5/os/thread_safe.c
@@ -0,0 +1,40 @@
+/*
+ * lib/krb5/os/thread_safec
+ *
+ * Copyright 2005 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ * 
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ * 
+ *
+ * krb5_is_thread_safe() function.
+ */
+
+#include "k5-int.h"
+
+krb5_boolean KRB5_CALLCONV
+krb5_is_thread_safe(void)
+{
+#if defined(ENABLE_THREADS)
+    return 1;
+#else
+    return 0;
+#endif
+}