lib: Simplify implementation of uhd::get_system_time() to use <chrono>

uhd::get_system_time() is currently only used in USRP1 code, and it
turns out that our "optimized", platform-dependent implementation still
is a little slower than straight-up chrono. We therefore remove all the
special cases, and replace them with a single, standard solution.

1 files changed, 0 insertions, 62 deletions

diff --git a/host/lib/utils/CMakeLists.txt b/host/lib/utils/CMakeLists.txt
index 5c4478909..4369a8f11 100644
--- a/host/lib/utils/CMakeLists.txt
+++ b/host/lib/utils/CMakeLists.txt
@@ -132,68 +132,6 @@ set_source_files_properties(
 )
 
 ########################################################################
-# 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
 ########################################################################
 message(STATUS "")