3 files changed, 13 insertions, 4 deletions
diff --git a/tests/glthread/thread.c b/tests/glthread/thread.c
index d3829ce..8f2a8e2 100644
--- a/tests/glthread/thread.c
+++ b/tests/glthread/thread.c
@@ -1,5 +1,5 @@
 /* Creating and controlling threads.
-   Copyright (C) 2005-2015 Free Software Foundation, Inc.
+   Copyright (C) 2005-2016 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -33,7 +33,7 @@
 
 #include <pthread.h>
 
-#ifdef PTW32_VERSION
+#if defined PTW32_VERSION || defined __MVS__
 
 const gl_thread_t gl_null_thread /* = { .p = NULL } */;
 
diff --git a/tests/glthread/thread.h b/tests/glthread/thread.h
index 2817437..4488a9e 100644
--- a/tests/glthread/thread.h
+++ b/tests/glthread/thread.h
@@ -1,5 +1,5 @@
 /* Creating and controlling threads.
-   Copyright (C) 2005-2015 Free Software Foundation, Inc.
+   Copyright (C) 2005-2016 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -172,6 +172,15 @@ typedef pthread_t gl_thread_t;
 #  define gl_thread_self_pointer() \
      (pthread_in_use () ? pthread_self ().p : NULL)
 extern const gl_thread_t gl_null_thread;
+# elif defined __MVS__
+   /* On IBM z/OS, pthread_t is a struct with an 8-byte '__' field.
+      The first three bytes of this field appear to uniquely identify a
+      pthread_t, though not necessarily representing a pointer.  */
+#  define gl_thread_self() \
+     (pthread_in_use () ? pthread_self () : gl_null_thread)
+#  define gl_thread_self_pointer() \
+     (pthread_in_use () ? *((void **) pthread_self ().__) : NULL)
+extern const gl_thread_t gl_null_thread;
 # else
 #  define gl_thread_self() \
      (pthread_in_use () ? pthread_self () : (pthread_t) NULL)
diff --git a/tests/glthread/yield.h b/tests/glthread/yield.h
index b18db5b..19224c6 100644
--- a/tests/glthread/yield.h
+++ b/tests/glthread/yield.h
@@ -1,5 +1,5 @@
 /* Yielding the processor to other threads and processes.
-   Copyright (C) 2005-2015 Free Software Foundation, Inc.
+   Copyright (C) 2005-2016 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by