From 7fa1f6ed0726ff0f908245e43a01f50620293e8d Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Thu, 24 Aug 2017 15:48:42 -0700
Subject: uhd: Moved get_system_time outside of public API

uhd::get_system_time() is an abstracted way of reading back a time, and
is not UHD-specific. As such, there's no reason to keep it in the public
part of the API where we're contractually obligated not to touch it.
Instead, moving it to the internal API space.
---
 host/lib/utils/CMakeLists.txt  | 63 ++++++++++++++++++++++++++++++++++++++++++
 host/lib/utils/system_time.cpp | 54 ++++++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 host/lib/utils/system_time.cpp

(limited to 'host/lib/utils')

diff --git a/host/lib/utils/CMakeLists.txt b/host/lib/utils/CMakeLists.txt
index 659c855a1..ea59df081 100644
--- a/host/lib/utils/CMakeLists.txt
+++ b/host/lib/utils/CMakeLists.txt
@@ -90,6 +90,68 @@ SET_SOURCE_FILES_PROPERTIES(
     PROPERTIES COMPILE_DEFINITIONS "${THREAD_PRIO_DEFS}"
 )
 
+########################################################################
+# 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
+)
+SET(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.")
+    SET(SYSTEM_TIME_DEFS HAVE_CLOCK_GETTIME)
+    LIBUHD_APPEND_LIBS("-lrt")
+ELSEIF(HAVE_MACH_ABSOLUTE_TIME)
+    MESSAGE(STATUS "  High resolution timing supported through mach_absolute_time.")
+    SET(SYSTEM_TIME_DEFS HAVE_MACH_ABSOLUTE_TIME)
+ELSEIF(HAVE_QUERY_PERFORMANCE_COUNTER)
+    MESSAGE(STATUS "  High resolution timing supported through QueryPerformanceCounter.")
+    SET(SYSTEM_TIME_DEFS HAVE_QUERY_PERFORMANCE_COUNTER)
+ELSE()
+    MESSAGE(STATUS "  High resolution timing supported though microsec_clock.")
+    SET(SYSTEM_TIME_DEFS HAVE_MICROSEC_CLOCK)
+ENDIF()
+
+SET_SOURCE_FILES_PROPERTIES(
+    ${CMAKE_CURRENT_SOURCE_DIR}/system_time.cpp
+    PROPERTIES COMPILE_DEFINITIONS "${SYSTEM_TIME_DEFS}"
+)
+
 ########################################################################
 # Setup defines for module loading
 ########################################################################
@@ -178,6 +240,7 @@ LIBUHD_APPEND_SOURCES(
     ${CMAKE_CURRENT_SOURCE_DIR}/platform.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/prefs.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/static.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/system_time.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/tasks.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/thread.cpp
 )
diff --git a/host/lib/utils/system_time.cpp b/host/lib/utils/system_time.cpp
new file mode 100644
index 000000000..d371756bc
--- /dev/null
+++ b/host/lib/utils/system_time.cpp
@@ -0,0 +1,54 @@
+//
+// Copyright 2017 Ettus Research (National Instruments Corp.)
+//
+// SPDX-License-Identifier: GPL-3.0+
+//
+
+#include <uhd/utils/system_time.hpp>
+
+using namespace uhd;
+
+#ifdef HAVE_CLOCK_GETTIME
+#include <time.h>
+time_spec_t uhd::get_system_time(void){
+    timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);
+    return time_spec_t(ts.tv_sec, ts.tv_nsec, 1e9);
+}
+#endif /* HAVE_CLOCK_GETTIME */
+
+
+#ifdef HAVE_MACH_ABSOLUTE_TIME
+#include <mach/mach_time.h>
+time_spec_t uhd::get_system_time(void){
+    mach_timebase_info_data_t info; mach_timebase_info(&info);
+    intmax_t nanosecs = mach_absolute_time()*info.numer/info.denom;
+    return time_spec_t::from_ticks(nanosecs, 1e9);
+}
+#endif /* HAVE_MACH_ABSOLUTE_TIME */
+
+
+#ifdef HAVE_QUERY_PERFORMANCE_COUNTER
+#include <Windows.h>
+time_spec_t uhd::get_system_time(void){
+    LARGE_INTEGER counts, freq;
+    QueryPerformanceCounter(&counts);
+    QueryPerformanceFrequency(&freq);
+    return time_spec_t::from_ticks(counts.QuadPart, double(freq.QuadPart));
+}
+#endif /* HAVE_QUERY_PERFORMANCE_COUNTER */
+
+
+#ifdef HAVE_MICROSEC_CLOCK
+#include <boost/date_time/posix_time/posix_time.hpp>
+namespace pt = boost::posix_time;
+time_spec_t uhd::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 /* HAVE_MICROSEC_CLOCK */
+
-- 
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