From ec0fcd99133c7f6a4e63830a9cf6674c4abc95bf Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sun, 27 Jun 2010 12:01:17 -0400
Subject: Checking for clock_gettime and timespec defined; use gettimeofday if
not, but put it into a timespec structure.
---
gr-qtgui/src/lib/highResTimeFunctions.h | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
(limited to 'gr-qtgui/src')
diff --git a/gr-qtgui/src/lib/highResTimeFunctions.h b/gr-qtgui/src/lib/highResTimeFunctions.h
index 4a82498b49..dc5e1bb801 100644
--- a/gr-qtgui/src/lib/highResTimeFunctions.h
+++ b/gr-qtgui/src/lib/highResTimeFunctions.h
@@ -246,6 +246,9 @@ diff_timespec(const struct timespec* t1,
}
+#ifdef CLOCK_REALTIME
+// If we can use clock_gettime, use it;
+// otherwise, use gettimeofday
static inline void
get_highres_clock(struct timespec* ret)
{
@@ -259,6 +262,29 @@ get_highres_clock(struct timespec* ret)
}
}
+#else
+
+// Test to see if timespec is defined; if not, define it here
+#if !defined __timespec_defined
+typedef struct _timespec
+{
+ long int tv_sec;
+ long int tv_nsec;
+} timespec;
+#endif
+
+// Trick the system into thinking it has an nsec timer
+// but only use the low resolution (usec) timer.
+static inline void
+get_highres_clock(struct timespec* ret)
+{
+ timeval lowResTime;
+ gettimeofday(&lowResTime, NULL);
+ ret->tv_sec = lowResTime.tv_sec;
+ ret->tv_nsec = lowResTime.tv_usec*1000;
+}
+#endif
+
static inline struct timespec
get_highres_clock()
{
--
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