From 1a78a62555be32868418fe52f8e330c9d0f95d5a Mon Sep 17 00:00:00 2001
From: Anas Nashif <anas.nashif@intel.com>
Date: Tue, 30 Oct 2012 12:57:26 -0700
Subject: Imported Upstream version 1.49.0

---
 boost/chrono/detail/inlined/win/chrono.hpp | 159 +++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 boost/chrono/detail/inlined/win/chrono.hpp

(limited to 'boost/chrono/detail/inlined/win/chrono.hpp')

diff --git a/boost/chrono/detail/inlined/win/chrono.hpp b/boost/chrono/detail/inlined/win/chrono.hpp
new file mode 100644
index 0000000000..d953fe4bb4
--- /dev/null
+++ b/boost/chrono/detail/inlined/win/chrono.hpp
@@ -0,0 +1,159 @@
+//  win/chrono.cpp  --------------------------------------------------------------//
+
+//  Copyright Beman Dawes 2008
+//  Copyright 2009-2010 Vicente J. Botet Escriba
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//----------------------------------------------------------------------------//
+//                                Windows                                     //
+//----------------------------------------------------------------------------//
+#ifndef BOOST_CHRONO_DETAIL_INLINED_WIN_CHRONO_HPP
+#define BOOST_CHRONO_DETAIL_INLINED_WIN_CHRONO_HPP
+
+#include <boost/detail/win/time.hpp>
+#include <boost/detail/win/timers.hpp>
+#include <boost/detail/win/GetLastError.hpp>
+
+namespace boost
+{
+namespace chrono
+{
+namespace chrono_detail
+{
+
+  BOOST_CHRONO_INLINE double get_nanosecs_per_tic() BOOST_NOEXCEPT
+  {
+      boost::detail::win32::LARGE_INTEGER_ freq;
+      if ( !boost::detail::win32::QueryPerformanceFrequency( &freq ) )
+          return 0.0L;
+      return double(1000000000.0L / freq.QuadPart);
+  }
+
+}
+
+  steady_clock::time_point steady_clock::now() BOOST_NOEXCEPT
+  {
+    static double nanosecs_per_tic = chrono_detail::get_nanosecs_per_tic();
+
+    boost::detail::win32::LARGE_INTEGER_ pcount;
+    if ( (nanosecs_per_tic <= 0.0L) ||
+            (!boost::detail::win32::QueryPerformanceCounter( &pcount )) )
+    {
+      BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
+    }
+
+    return steady_clock::time_point(steady_clock::duration(
+      static_cast<steady_clock::rep>((nanosecs_per_tic) * pcount.QuadPart)));
+  }
+
+
+#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
+  steady_clock::time_point steady_clock::now( system::error_code & ec )
+  {
+    static double nanosecs_per_tic = chrono_detail::get_nanosecs_per_tic();
+
+    boost::detail::win32::LARGE_INTEGER_ pcount;
+    if ( (nanosecs_per_tic <= 0.0L)
+            || (!boost::detail::win32::QueryPerformanceCounter( &pcount )) )
+    {
+        boost::detail::win32::DWORD_ cause =
+            ((nanosecs_per_tic <= 0.0L)
+                    ? ERROR_NOT_SUPPORTED
+                    : boost::detail::win32::GetLastError());
+        if (BOOST_CHRONO_IS_THROWS(ec)) {
+            boost::throw_exception(
+                    system::system_error(
+                            cause,
+                            BOOST_CHRONO_SYSTEM_CATEGORY,
+                            "chrono::steady_clock" ));
+        }
+        else
+        {
+            ec.assign( cause, BOOST_CHRONO_SYSTEM_CATEGORY );
+            return steady_clock::time_point(duration(0));
+        }
+    }
+
+    if (!BOOST_CHRONO_IS_THROWS(ec))
+    {
+        ec.clear();
+    }
+    return time_point(duration(
+      static_cast<steady_clock::rep>(nanosecs_per_tic * pcount.QuadPart)));
+  }
+#endif
+
+  BOOST_CHRONO_INLINE
+  system_clock::time_point system_clock::now() BOOST_NOEXCEPT
+  {
+    boost::detail::win32::FILETIME_ ft;
+  #if defined(UNDER_CE)
+    // Windows CE does not define GetSystemTimeAsFileTime so we do it in two steps.
+    boost::detail::win32::SYSTEMTIME_ st;
+    boost::detail::win32::GetSystemTime( &st );
+    boost::detail::win32::SystemTimeToFileTime( &st, &ft );
+  #else
+    boost::detail::win32::GetSystemTimeAsFileTime( &ft );  // never fails
+  #endif
+    return system_clock::time_point(system_clock::duration(
+      (static_cast<__int64>( ft.dwHighDateTime ) << 32) | ft.dwLowDateTime));
+  }
+
+#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
+  BOOST_CHRONO_INLINE
+  system_clock::time_point system_clock::now( system::error_code & ec )
+  {
+    boost::detail::win32::FILETIME_ ft;
+  #if defined(UNDER_CE)
+    // Windows CE does not define GetSystemTimeAsFileTime so we do it in two steps.
+    boost::detail::win32::SYSTEMTIME_ st;
+    boost::detail::win32::GetSystemTime( &st );
+    boost::detail::win32::SystemTimeToFileTime( &st, &ft );
+  #else
+    boost::detail::win32::GetSystemTimeAsFileTime( &ft );  // never fails
+  #endif
+    if (!BOOST_CHRONO_IS_THROWS(ec))
+    {
+        ec.clear();
+    }
+    return time_point(duration(
+      (static_cast<__int64>( ft.dwHighDateTime ) << 32) | ft.dwLowDateTime));
+  }
+#endif
+
+  BOOST_CHRONO_INLINE
+  std::time_t system_clock::to_time_t(const system_clock::time_point& t) BOOST_NOEXCEPT
+  {
+      __int64 temp = t.time_since_epoch().count();
+
+  #   if (!defined( BOOST_MSVC )) || (BOOST_MSVC > 1300) // > VC++ 7.0
+      temp -= 116444736000000000LL;  // delta from epoch in microseconds
+  #   else
+      temp -= 116444736000000000;
+  #   endif
+
+      temp /= 10000000;
+      return static_cast<std::time_t>( temp );
+  }
+
+  BOOST_CHRONO_INLINE
+  system_clock::time_point system_clock::from_time_t(std::time_t t) BOOST_NOEXCEPT
+  {
+      __int64 temp = t;
+      temp *= 10000000;
+
+  #   if (!defined( BOOST_MSVC )) || (BOOST_MSVC > 1300) // > VC++ 7.0
+      temp += 116444736000000000LL;
+  #   else
+      temp += 116444736000000000;
+  #   endif
+
+      return time_point(duration(temp));
+  }
+
+}  // namespace chrono
+}  // namespace boost
+
+#endif
-- 
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