Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/src/boost/libs/timer/test/cpu_timer_info.cpp b/src/boost/libs/timer/test/cpu_timer_info.cpp
new file mode 100644
index 00000000..11e722c8
--- /dev/null
+++ b/src/boost/libs/timer/test/cpu_timer_info.cpp
@@ -0,0 +1,75 @@
+//  boost cpu_timer_info.cpp  ----------------------------------------------------------//
+
+//  Copyright Beman Dawes 2011
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  See http://www.boost.org/libs/timer for documentation.
+
+#include <boost/timer/timer.hpp>
+#include <boost/chrono/chrono.hpp>
+#include <boost/detail/lightweight_main.hpp>
+#include <cstdlib> // for atol()
+#include <iostream>
+#include <locale>
+
+using boost::timer::nanosecond_type;
+using boost::timer::cpu_times;
+using boost::timer::cpu_timer;
+using boost::timer::auto_cpu_timer;
+using std::cout; using std::endl;
+
+int cpp_main( int argc, char * argv[] )
+{
+  cout << '\n';
+  cout << "For cpu_times.wall, the underlying clock "
+       << (boost::chrono::high_resolution_clock::is_steady
+           ? "is steady. "
+           : "is not steady. "
+          )
+       << "Steady clocks are defined by C++11 as clocks for which values "
+          "of time_point never decrease as physical time advances and for "
+          "which values of time_point advance at a steady rate relative to "
+          "real time. That is, the clock may not be adjusted.\n\n";
+  
+  cpu_times start_time;
+  start_time.clear();
+  cpu_times current_time;
+
+  {
+    cpu_timer cpu;
+    cout << "measure boost::timer::cpu_timer resolution for user time..."
+              << endl;
+    for (int i = 0; i < 3; ++i)
+    {
+      cpu.start();
+      start_time = cpu.elapsed();
+      current_time.user = start_time.user;
+      while (current_time.user == start_time.user)
+      {
+        current_time = cpu.elapsed();
+      }
+      cout << current_time.user - start_time.user << "ns\n";
+    }
+  }
+ 
+  {
+    cpu_timer cpu;
+    cout << "measure boost::timer::cpu_timer resolution for wall-clock time..."
+              << endl;
+    for (int i = 0; i < 100; ++i)
+    {
+      cpu.start();
+      start_time.wall = cpu.elapsed().wall;
+      current_time.wall = start_time.wall;
+      while (current_time.wall == start_time.wall)
+      {
+        current_time.wall = cpu.elapsed().wall;
+      }
+      cout << current_time.wall - start_time.wall << "ns ";
+    }
+  }
+ return 0;
+}
+