Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
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+//  boost thread_clock.cpp  -----------------------------------------------------------//
+
+//  Copyright Beman Dawes 1994, 2006, 2008
+//  Copyright Vicente J. Botet Escriba 2009-2011
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  See http://www.boost.org/libs/chrono for documentation.
+
+//--------------------------------------------------------------------------------------//
+
+#include <boost/chrono/config.hpp>
+#include <boost/chrono/thread_clock.hpp>
+#include <cassert>
+#include <boost/assert.hpp>
+
+#if !defined(__VXWORKS__)
+# include <sys/times.h>
+#endif
+# include <pthread.h>
+# include <unistd.h>
+
+namespace boost { namespace chrono {
+
+    thread_clock::time_point thread_clock::now( ) BOOST_NOEXCEPT
+    {
+      struct timespec ts;
+#if defined CLOCK_THREAD_CPUTIME_ID
+        // get the timespec associated to the thread clock
+        if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) )
+#else
+        // get the current thread
+        pthread_t pth=pthread_self();
+        // get the clock_id associated to the current thread
+        clockid_t clock_id;
+        pthread_getcpuclockid(pth, &clock_id);
+        // get the timespec associated to the thread clock
+        if ( ::clock_gettime( clock_id, &ts ) )
+#endif
+        {
+          BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
+        }
+
+        // transform to nanoseconds
+        return time_point(duration(
+            static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
+
+    }
+
+#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
+    thread_clock::time_point thread_clock::now( system::error_code & ec )
+    {
+      struct timespec ts;
+#if defined CLOCK_THREAD_CPUTIME_ID
+        // get the timespec associated to the thread clock
+        if ( ::clock_gettime( CLOCK_THREAD_CPUTIME_ID, &ts ) )
+#else
+        // get the current thread
+        pthread_t pth=pthread_self();
+        // get the clock_id associated to the current thread
+        clockid_t clock_id;
+        pthread_getcpuclockid(pth, &clock_id);
+        // get the timespec associated to the thread clock
+        if ( ::clock_gettime( clock_id, &ts ) )
+#endif
+        {
+            if (BOOST_CHRONO_IS_THROWS(ec))
+            {
+                boost::throw_exception(
+                        system::system_error(
+                                errno,
+                                BOOST_CHRONO_SYSTEM_CATEGORY,
+                                "chrono::thread_clock" ));
+            }
+            else
+            {
+                ec.assign( errno, BOOST_CHRONO_SYSTEM_CATEGORY );
+                return time_point();
+            }
+        }
+        if (!BOOST_CHRONO_IS_THROWS(ec))
+        {
+            ec.clear();
+        }
+        // transform to nanoseconds
+        return time_point(duration(
+            static_cast<thread_clock::rep>( ts.tv_sec ) * 1000000000 + ts.tv_nsec));
+
+    }
+#endif
+} }