Imported Upstream version 1.57.0

[platform/upstream/boost.git] / boost / thread / pthread / timespec.hpp

diff --git a/boost/thread/pthread/timespec.hpp b/boost/thread/pthread/timespec.hpp
index d7465c1..82f50f6 100644 (file)
--- a/boost/thread/pthread/timespec.hpp
+++ b/boost/thread/pthread/timespec.hpp
@@ -1,34 +1,118 @@
 #ifndef BOOST_THREAD_PTHREAD_TIMESPEC_HPP
 #define BOOST_THREAD_PTHREAD_TIMESPEC_HPP
-//  (C) Copyright 2007-8 Anthony Williams 
+//  (C) Copyright 2007-8 Anthony Williams
+//  (C) Copyright 2012 Vicente J. Botet Escriba
 //
 //  Distributed under the Boost Software License, Version 1.0. (See
 //  accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/thread/detail/config.hpp>
 #include <boost/thread/thread_time.hpp>
+#if defined BOOST_THREAD_USES_DATETIME
 #include <boost/date_time/posix_time/conversion.hpp>
+#endif
 #include <pthread.h>
 #ifndef _WIN32
 #include <unistd.h>
 #endif
+#ifdef BOOST_THREAD_USES_CHRONO
+#include <boost/chrono/duration.hpp>
+#endif
+
+#if defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
+#     define BOOST_THREAD_TIMESPEC_MAC_API
+#include <sys/time.h> //for gettimeofday and timeval
+#else
+#include <time.h>  // for clock_gettime
+#endif
 
 #include <boost/config/abi_prefix.hpp>
 
 namespace boost
 {
-    namespace detail
-    {
-        inline struct timespec get_timespec(boost::system_time const& abs_time)
-        {
-            struct timespec timeout={0,0};
-            boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);
-            
-            timeout.tv_sec=time_since_epoch.total_seconds();
-            timeout.tv_nsec=(long)(time_since_epoch.fractional_seconds()*(1000000000l/time_since_epoch.ticks_per_second()));
-            return timeout;
-        }
+  namespace detail
+  {
+#if defined BOOST_THREAD_USES_DATETIME
+    inline struct timespec to_timespec(boost::system_time const& abs_time)
+    {
+      struct timespec timeout = { 0,0};
+      boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);
+
+      timeout.tv_sec=time_since_epoch.total_seconds();
+      timeout.tv_nsec=(long)(time_since_epoch.fractional_seconds()*(1000000000l/time_since_epoch.ticks_per_second()));
+      return timeout;
+    }
+#endif
+#if defined BOOST_THREAD_USES_CHRONO
+    inline timespec to_timespec(chrono::nanoseconds const& ns)
+    {
+      struct timespec ts;
+      ts.tv_sec = static_cast<long>(chrono::duration_cast<chrono::seconds>(ns).count());
+      ts.tv_nsec = static_cast<long>((ns - chrono::duration_cast<chrono::seconds>(ns)).count());
+      return ts;
     }
+
+#endif
+
+    inline timespec to_timespec(boost::intmax_t const& ns)
+    {
+      boost::intmax_t s = ns / 1000000000l;
+      struct timespec ts;
+      ts.tv_sec = static_cast<long> (s);
+      ts.tv_nsec = static_cast<long> (ns - s * 1000000000l);
+      return ts;
+    }
+    inline boost::intmax_t to_nanoseconds_int_max(timespec const& ts)
+    {
+      return static_cast<boost::intmax_t>(ts.tv_sec) * 1000000000l + ts.tv_nsec;
+    }
+    inline bool timespec_ge_zero(timespec const& ts)
+    {
+      return (ts.tv_sec >= 0) || (ts.tv_nsec >= 0);
+    }
+    inline timespec timespec_now()
+    {
+      timespec ts;
+
+#if defined(BOOST_THREAD_TIMESPEC_MAC_API)
+      timeval tv;
+      ::gettimeofday(&tv, 0);
+      ts.tv_sec = tv.tv_sec;
+      ts.tv_nsec = tv.tv_usec * 1000;
+#else
+      if ( ::clock_gettime( CLOCK_REALTIME, &ts ) )
+      {
+        BOOST_ASSERT(0 && "Boost::Thread - Internal Error");
+      }
+#endif
+      return ts;
+    }
+    inline timespec timespec_zero()
+    {
+      timespec ts;
+      ts.tv_sec = 0;
+      ts.tv_nsec = 0;
+      return ts;
+    }
+    inline timespec timespec_plus(timespec const& lhs, timespec const& rhs)
+    {
+      return to_timespec(to_nanoseconds_int_max(lhs) + to_nanoseconds_int_max(rhs));
+    }
+    inline timespec timespec_minus(timespec const& lhs, timespec const& rhs)
+    {
+      return to_timespec(to_nanoseconds_int_max(lhs) - to_nanoseconds_int_max(rhs));
+    }
+    inline bool timespec_gt(timespec const& lhs, timespec const& rhs)
+    {
+      return to_nanoseconds_int_max(lhs) > to_nanoseconds_int_max(rhs);
+    }
+    inline bool timespec_ge(timespec const& lhs, timespec const& rhs)
+    {
+      return to_nanoseconds_int_max(lhs) >= to_nanoseconds_int_max(rhs);
+    }
+
+  }
 }
 
 #include <boost/config/abi_suffix.hpp>