X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ftimespec.h;h=388ddb83a76120814003276f18966a4f7a904faf;hb=ab624c1a8f744419fdb653b77250153a3563203f;hp=74d5749df60e075bdbec4576691259b6e69372c2;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/lib/timespec.h b/lib/timespec.h
index 74d5749df..388ddb83a 100644
--- a/lib/timespec.h
+++ b/lib/timespec.h
@@ -1,6 +1,6 @@
 /* timespec -- System time interface
 
-   Copyright (C) 2000, 2002, 2004-2005, 2007, 2009-2011 Free Software
+   Copyright (C) 2000, 2002, 2004-2005, 2007, 2009-2012 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -57,6 +57,25 @@ timespec_cmp (struct timespec a, struct timespec b)
           : (int) (a.tv_nsec - b.tv_nsec));
 }
 
+/* Return -1, 0, 1, depending on the sign of A.  A.tv_nsec must be
+   nonnegative.  */
+static inline int
+timespec_sign (struct timespec a)
+{
+  return a.tv_sec < 0 ? -1 : a.tv_sec || a.tv_nsec;
+}
+
+struct timespec timespec_add (struct timespec, struct timespec);
+struct timespec timespec_sub (struct timespec, struct timespec);
+struct timespec dtotimespec (double);
+
+/* Return an approximation to A, of type 'double'.  */
+static inline double
+timespectod (struct timespec a)
+{
+  return a.tv_sec + a.tv_nsec / 1e9;
+}
+
 void gettime (struct timespec *);
 int settime (struct timespec const *);