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-rw-r--r--host/include/uhd/types/time_spec.hpp7
-rw-r--r--host/lib/types/CMakeLists.txt55
-rw-r--r--host/lib/types/time_spec.cpp73
-rw-r--r--host/tests/time_spec_test.cpp19
4 files changed, 154 insertions, 0 deletions
diff --git a/host/include/uhd/types/time_spec.hpp b/host/include/uhd/types/time_spec.hpp
index 57d002d48..2046fbd3f 100644
--- a/host/include/uhd/types/time_spec.hpp
+++ b/host/include/uhd/types/time_spec.hpp
@@ -40,6 +40,13 @@ namespace uhd{
public:
/*!
+ * Get the system time in time_spec_t format.
+ * Uses the highest precision clock available.
+ * \return the system time as a time_spec_t
+ */
+ static time_spec_t get_system_time(void);
+
+ /*!
* Create a time_spec_t from a real-valued seconds count.
* \param secs the real-valued seconds count (default = 0)
*/
diff --git a/host/lib/types/CMakeLists.txt b/host/lib/types/CMakeLists.txt
index dfb7cf903..bcc04e08d 100644
--- a/host/lib/types/CMakeLists.txt
+++ b/host/lib/types/CMakeLists.txt
@@ -16,6 +16,61 @@
#
########################################################################
+# Setup defines for high resolution timing
+########################################################################
+MESSAGE(STATUS "")
+MESSAGE(STATUS "Configuring high resolution timing...")
+INCLUDE(CheckCXXSourceCompiles)
+
+SET(CMAKE_REQUIRED_LIBRARIES -lrt)
+CHECK_CXX_SOURCE_COMPILES("
+ #include <ctime>
+ int main(){
+ timespec ts;
+ return clock_gettime(CLOCK_MONOTONIC, &ts);
+ }
+ " HAVE_CLOCK_GETTIME
+)
+UNSET(CMAKE_REQUIRED_LIBRARIES)
+
+INCLUDE(CheckCXXSourceCompiles)
+CHECK_CXX_SOURCE_COMPILES("
+ #include <mach/mach_time.h>
+ int main(){
+ mach_timebase_info_data_t info;
+ mach_timebase_info(&info);
+ mach_absolute_time();
+ return 0;
+ }
+ " HAVE_MACH_ABSOLUTE_TIME
+)
+
+CHECK_CXX_SOURCE_COMPILES("
+ #include <Windows.h>
+ int main(){
+ LARGE_INTEGER value;
+ QueryPerformanceCounter(&value);
+ QueryPerformanceFrequency(&value);
+ return 0;
+ }
+ " HAVE_QUERY_PERFORMANCE_COUNTER
+)
+
+IF(HAVE_CLOCK_GETTIME)
+ MESSAGE(STATUS " High resolution timing supported through clock_gettime.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_GETTIME)
+ELSEIF(HAVE_MACH_ABSOLUTE_TIME)
+ MESSAGE(STATUS " High resolution timing supported through mach_absolute_time.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_MACH_ABSOLUTE_TIME)
+ELSEIF(HAVE_QUERY_PERFORMANCE_COUNTER)
+ MESSAGE(STATUS " High resolution timing supported through QueryPerformanceCounter.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER)
+ELSE()
+ MESSAGE(STATUS " High resolution timing supported though microsec_clock.")
+ ADD_DEFINITIONS(-DTIME_SPEC_USE_MICROSEC_CLOCK)
+ENDIF()
+
+########################################################################
# This file included, use CMake directory variables
########################################################################
LIBUHD_APPEND_SOURCES(
diff --git a/host/lib/types/time_spec.cpp b/host/lib/types/time_spec.cpp
index f39625a11..312c161cb 100644
--- a/host/lib/types/time_spec.cpp
+++ b/host/lib/types/time_spec.cpp
@@ -19,6 +19,73 @@
#include <boost/math/special_functions/round.hpp>
using namespace uhd;
+
+/***********************************************************************
+ * Time spec system time
+ **********************************************************************/
+
+/*!
+ * Creates a time spec from system counts:
+ * TODO make part of API as a static factory function
+ * The counts type is 64 bits and will overflow the ticks type of long.
+ * Therefore, divmod the counts into seconds + sub-second counts first.
+ */
+#include <inttypes.h> //imaxdiv, intmax_t
+static UHD_INLINE time_spec_t time_spec_t_from_counts(intmax_t counts, intmax_t freq){
+ imaxdiv_t divres = imaxdiv(counts, freq);
+ return time_spec_t(time_t(divres.quot), double(divres.rem)/freq);
+}
+
+#ifdef TIME_SPEC_USE_CLOCK_GETTIME
+#include <time.h>
+time_spec_t time_spec_t::get_system_time(void){
+ timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
+ return time_spec_t(ts.tv_sec, ts.tv_nsec, 1e9);
+}
+#endif /* TIME_SPEC_USE_CLOCK_GETTIME */
+
+
+#ifdef TIME_SPEC_USE_MACH_ABSOLUTE_TIME
+#include <mach/mach_time.h>
+static intmax_t get_freq(void){
+ mach_timebase_info_data_t info; mach_timebase_info(&info);
+ return intmax_t(1e9*(double(info.denom)/double(info.numer)));
+}
+time_spec_t time_spec_t::get_system_time(void){
+ static const intmax_t freq = get_freq();
+ return time_spec_t_from_counts(mach_absolute_time(), freq);
+}
+#endif /* TIME_SPEC_USE_MACH_ABSOLUTE_TIME */
+
+
+#ifdef TIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER
+#include <Windows.h>
+time_spec_t time_spec_t::get_system_time(void){
+ LARGE_INTEGER counts, freq;
+ QueryPerformanceCounter(&counts);
+ QueryPerformanceFrequency(&freq);
+ return time_spec_t_from_counts(counts.QuadPart, freq.QuadPart);
+}
+#endif /* TIME_SPEC_USE_QUERY_PERFORMANCE_COUNTER */
+
+
+#ifdef TIME_SPEC_USE_MICROSEC_CLOCK
+#include <boost/date_time/posix_time/posix_time.hpp>
+namespace pt = boost::posix_time;
+time_spec_t time_spec_t::get_system_time(void){
+ pt::ptime time_now = pt::microsec_clock::universal_time();
+ pt::time_duration time_dur = time_now - pt::from_time_t(0);
+ return time_spec_t(
+ time_t(time_dur.total_seconds()),
+ long(time_dur.fractional_seconds()),
+ double(pt::time_duration::ticks_per_second())
+ );
+}
+#endif /* TIME_SPEC_USE_MICROSEC_CLOCK */
+
+/***********************************************************************
+ * Time spec constructors
+ **********************************************************************/
time_spec_t::time_spec_t(double secs):
_full_secs(0),
_frac_secs(secs)
@@ -40,6 +107,9 @@ time_spec_t::time_spec_t(time_t full_secs, long tick_count, double tick_rate):
/* NOP */
}
+/***********************************************************************
+ * Time spec accessors
+ **********************************************************************/
long time_spec_t::get_tick_count(double tick_rate) const{
return boost::math::iround(this->get_frac_secs()*tick_rate);
}
@@ -58,6 +128,9 @@ double time_spec_t::get_frac_secs(void) const{
return std::fmod(this->_frac_secs, 1.0);
}
+/***********************************************************************
+ * Time spec math overloads
+ **********************************************************************/
time_spec_t &time_spec_t::operator+=(const time_spec_t &rhs){
this->_full_secs += rhs.get_full_secs();
this->_frac_secs += rhs.get_frac_secs();
diff --git a/host/tests/time_spec_test.cpp b/host/tests/time_spec_test.cpp
index 5ad782160..070392f93 100644
--- a/host/tests/time_spec_test.cpp
+++ b/host/tests/time_spec_test.cpp
@@ -18,6 +18,7 @@
#include <boost/test/unit_test.hpp>
#include <uhd/types/time_spec.hpp>
#include <boost/foreach.hpp>
+#include <boost/thread.hpp> //sleep
#include <iostream>
BOOST_AUTO_TEST_CASE(test_time_spec_compare){
@@ -59,3 +60,21 @@ BOOST_AUTO_TEST_CASE(test_time_spec_parts){
BOOST_CHECK_CLOSE(uhd::time_spec_t(-1.1).get_frac_secs(), -0.1, 0.001);
BOOST_CHECK_EQUAL(uhd::time_spec_t(-1.1).get_tick_count(100), -10);
}
+
+BOOST_AUTO_TEST_CASE(test_time_spec_get_system_time){
+ std::cout << "Testing time specification get system time..." << std::endl;
+
+ //Not really checking for high resolution timing here,
+ //just need to check that system time is minimally working.
+
+ uhd::time_spec_t start = uhd::time_spec_t::get_system_time();
+ boost::this_thread::sleep(boost::posix_time::milliseconds(500));
+ uhd::time_spec_t stop = uhd::time_spec_t::get_system_time();
+
+ uhd::time_spec_t diff = stop - start;
+ std::cout << "start: " << start.get_real_secs() << std::endl;
+ std::cout << "stop: " << stop.get_real_secs() << std::endl;
+ std::cout << "diff: " << diff.get_real_secs() << std::endl;
+ BOOST_CHECK(diff.get_real_secs() > 0); //assert positive
+ BOOST_CHECK(diff.get_real_secs() < 1.0); //assert under 1s
+}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 14:57:10 +0000