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From: bdawes_at_[hidden]
Date: 2007-08-27 20:10:11


Author: bemandawes
Date: 2007-08-27 20:10:10 EDT (Mon, 27 Aug 2007)
New Revision: 39029
URL: http://svn.boost.org/trac/boost/changeset/39029

Log:
Initial commit to public repository. Earlier version in Beman Dawes private SVN.
Added:
   sandbox/boost/system/
   sandbox/boost/system/timer.hpp (contents, props changed)

Added: sandbox/boost/system/timer.hpp
==============================================================================
--- (empty file)
+++ sandbox/boost/system/timer.hpp 2007-08-27 20:10:10 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,105 @@
+// boost timer.hpp ---------------------------------------------------------//
+
+// Copyright Beman Dawes 1994-2007
+
+// 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)
+
+// See http://www.boost.org/libs/system for documentation.
+
+#ifndef BOOST_SYSTEM_TIMER_HPP
+#define BOOST_SYSTEM_TIMER_HPP
+
+#include <boost/system/config.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/cstdint.hpp>
+#include <string>
+#include <ostream>
+
+#include <boost/config/abi_prefix.hpp> // must be the last #include
+
+namespace boost
+{
+ namespace system
+ {
+ typedef boost::int_least64_t microsecond_t;
+
+ struct times_t
+ {
+ microsecond_t wall;
+ microsecond_t user;
+ microsecond_t system;
+ };
+
+ // low-level functions -------------------------------------------------//
+
+ BOOST_SYSTEM_DECL
+ void times( times_t & result ); // throws on error
+
+ BOOST_SYSTEM_DECL
+ error_code & times( times_t & result, error_code & ec ); // never throws
+
+ // timer ---------------------------------------------------------------//
+
+ // unless otherwise specified, all functions throw on error
+
+ class BOOST_SYSTEM_DECL timer
+ {
+ public:
+
+ timer() : m_flags(m_stopped) { start(); }
+ timer( const std::nothrow_t & ) : m_flags(static_cast<m_flags_t>(m_stopped
+ | m_nothrow)) { start(); }
+ ~timer() {} // never throws
+
+ void start();
+ const times_t & stop();
+ bool stopped() const { return m_flags & m_stopped; }
+ void elapsed( times_t & result ); // does not stop()
+
+ private:
+ times_t m_times;
+ enum m_flags_t { m_stopped=1, m_nothrow=2 };
+ m_flags_t m_flags;
+ };
+
+ // run_timer -----------------------------------------------------------//
+
+ // unless otherwise specified, all functions throw on error
+
+ class BOOST_SYSTEM_DECL run_timer : public timer
+ {
+ public:
+
+ // each constructor has two overloads to avoid an explicit default to
+ // std::cout, which in turn would require including <iostream> with its
+ // high associated cost even when the standard streams are not used.
+
+ explicit run_timer( int places = 2 );
+ run_timer( int places, std::ostream & os ) : m_places(places), m_os(os) {}
+
+ explicit run_timer( const std::string & format, int places = 2 );
+ run_timer( const std::string & format, int places, std::ostream & os )
+ : m_places(places), m_os(os), m_format(format) {}
+
+ ~run_timer() // never throws
+ {
+ error_code ec;
+ if ( !stopped() ) report( ec );
+ }
+
+ void report();
+ error_code report( error_code & ec ); // never throws
+
+ private:
+ int m_places;
+ std::ostream & m_os;
+ std::string m_format;
+ };
+
+ } // namespace system
+} // namespace boost
+
+#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+
+#endif // BOOST_SYSTEM_TIMER_HPP


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