Move timeval calculation functions into their own file.

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@926 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/polyp/timeval.h

@@ -0,0 +1,53 @@
+#ifndef footimevalhfoo
+#define footimevalhfoo
+
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+ 
+  polypaudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <polyp/cdecl.h>
+#include <polyp/sample.h>
+
+/** \file
+ * Utility functions for handling timeval calculations */
+
+PA_C_DECL_BEGIN
+
+struct timeval;
+
+/** Return the current timestamp, just like UNIX gettimeofday() */
+struct timeval *pa_gettimeofday(struct timeval *tv);
+
+/** Calculate the difference between the two specified timeval
+ * structs. */
+pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b);
+
+/** Compare the two timeval structs and return 0 when equal, negative when a < b, positive otherwse */
+int pa_timeval_cmp(const struct timeval *a, const struct timeval *b);
+
+/** Return the time difference between now and the specified timestamp */
+pa_usec_t pa_timeval_age(const struct timeval *tv);
+
+/** Add the specified time inmicroseconds to the specified timeval structure */
+struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v);
+
+PA_C_DECL_END
+
+#endif