2 files changed, 125 insertions, 0 deletions
diff --git a/gruel/src/include/gruel/Makefile.am b/gruel/src/include/gruel/Makefile.am
index 89a9da7f0..96aed326e 100644
--- a/gruel/src/include/gruel/Makefile.am
+++ b/gruel/src/include/gruel/Makefile.am
@@ -27,6 +27,7 @@ gruelincludedir = $(prefix)/include/gruel
 
 gruelinclude_HEADERS = \
 	attributes.h \
+	high_res_timer.h \
 	inet.h \
 	msg_accepter.h \
 	msg_accepter_msgq.h \
diff --git a/gruel/src/include/gruel/high_res_timer.h b/gruel/src/include/gruel/high_res_timer.h
new file mode 100644
index 000000000..fe9ae763f
--- /dev/null
+++ b/gruel/src/include/gruel/high_res_timer.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2011 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef INCLUDED_GRUEL_HIGH_RES_TIMER_H
+#define INCLUDED_GRUEL_HIGH_RES_TIMER_H
+
+namespace gruel {
+    //! Typedef for the timer tick count
+    typedef signed long long high_res_timer_type;
+
+    //! Get the current time in ticks
+    high_res_timer_type high_res_timer_now(void);
+
+    //! Get the number of ticks per second
+    high_res_timer_type high_res_timer_tps(void);
+
+    //! Get the tick count at the epoch
+    high_res_timer_type high_res_timer_epoch(void);
+
+} /* namespace gruel */
+
+////////////////////////////////////////////////////////////////////////
+// Use architecture defines to determine the implementation
+////////////////////////////////////////////////////////////////////////
+#if defined(linux) || defined(__linux) || defined(__linux__)
+    #define GRUEL_HRT_USE_CLOCK_GETTIME
+#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
+    #define GRUEL_HRT_USE_QUERY_PERFORMANCE_COUNTER
+#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
+    #define GRUEL_HRT_USE_MACH_ABSOLUTE_TIME
+#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
+    #define GRUEL_HRT_USE_MACH_ABSOLUTE_TIME
+#else
+    #define GRUEL_HRT_USE_MICROSEC_CLOCK
+#endif
+
+////////////////////////////////////////////////////////////////////////
+#ifdef GRUEL_HRT_USE_CLOCK_GETTIME
+    #include <ctime>
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_now(void){
+        timespec ts;
+        clock_gettime(CLOCK_MONOTONIC, &ts);
+        return high_res_timer_type(ts.tv_sec*1000000000UL) + ts.tv_nsec;
+    }
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_tps(void){
+        return 1000000000UL;
+    }
+#endif /* GRUEL_HRT_USE_CLOCK_GETTIME */
+
+////////////////////////////////////////////////////////////////////////
+#ifdef GRUEL_HRT_USE_MACH_ABSOLUTE_TIME
+    #include <mach/mach_time.h>
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_now(void){
+        return mach_absolute_time();
+    }
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_tps(void){
+        mach_timebase_info_data_t info;
+        mach_timebase_info(&info);
+        return gruel::high_res_timer_type(info.numer*1000000000UL)/info.denom;
+    }
+#endif
+
+////////////////////////////////////////////////////////////////////////
+#ifdef GRUEL_HRT_USE_QUERY_PERFORMANCE_COUNTER
+    #include <Windows.h>
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_now(void){
+        LARGE_INTEGER counts;
+        QueryPerformanceCounter(&counts);
+        return counts.QuadPart;
+    }
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_tps(void){
+        LARGE_INTEGER freq;
+        QueryPerformanceFrequency(&freq);
+        return freq.QuadPart;
+    }
+#endif
+
+////////////////////////////////////////////////////////////////////////
+#ifdef GRUEL_HRT_USE_MICROSEC_CLOCK
+    #include <boost/date_time/posix_time/posix_time.hpp>
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_now(void){
+        static const boost::posix_time::ptime epoch(boost::posix_time::from_time_t(0));
+        return (boost::posix_time::microsec_clock::universal_time() - epoch).ticks();
+    }
+
+    inline gruel::high_res_timer_type gruel::high_res_timer_tps(void){
+        return boost::posix_time::time_duration::ticks_per_second();
+    }
+#endif
+
+////////////////////////////////////////////////////////////////////////
+#include <boost/date_time/posix_time/posix_time.hpp>
+
+inline gruel::high_res_timer_type gruel::high_res_timer_epoch(void){
+    static const double hrt_ticks_per_utc_ticks = gruel::high_res_timer_tps()/double(boost::posix_time::time_duration::ticks_per_second());
+    boost::posix_time::time_duration utc = boost::posix_time::microsec_clock::universal_time() - boost::posix_time::from_time_t(0);
+    return gruel::high_res_timer_now() - utc.ticks()*hrt_ticks_per_utc_ticks;
+}
+
+#endif /* INCLUDED_GRUEL_HIGH_RES_TIMER_H */