new file mode 100644
--- /dev/null
+++ b/threads.c
@@ -0,0 +1,49 @@
+/**
+ *     $Id: threads.c,v 1.1.1.1 2008-04-28 17:32:53 mbroeker Exp $
+ * $Source: /development/c/demos/threads.c,v $
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <pthread.h>
+#include <time.h>
+
+void *thread_func (void *vptr_args);
+
+void do_some_work (void)
+{
+    time_t start_time = time (NULL);
+
+    while (time (NULL) == start_time);  /* busy-wait for 0-1 seconds */
+}
+
+int main (int argc, char **argv)
+{
+    int i;
+    pthread_t thread;
+
+    pthread_create (&thread, NULL, &thread_func, NULL);
+
+    for (i = 0; i < 20; ++i) {
+        fprintf (stdout, "a\n");
+
+        do_some_work ();
+    }
+
+    pthread_join (thread, NULL);
+
+    exit (EXIT_SUCCESS);
+}
+
+void *thread_func (void *vptr_args)
+{
+    int i;
+
+    for (i = 0; i < 20; ++i) {
+        fprintf (stderr, "  b\n");
+
+        do_some_work ();
+    }
+    return NULL;
+}