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From: bdawes_at_[hidden]
Date: 2007-08-27 20:08:41

Next message: bdawes_at_[hidden]: "[Boost-commit] svn:boost r39029 - sandbox/boost/system"
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Author: bemandawes
Date: 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
New Revision: 39028
URL: http://svn.boost.org/trac/boost/changeset/39028

Log:
Initial commit to public repository. Earlier version in Beman Dawes private SVN.
Added:
   sandbox/libs/system/
   sandbox/libs/system/build/
   sandbox/libs/system/build/Jamfile.v2 (contents, props changed)
   sandbox/libs/system/doc/
   sandbox/libs/system/doc/timer.html (contents, props changed)
   sandbox/libs/system/example/
   sandbox/libs/system/example/run_timer_example.cpp (contents, props changed)
   sandbox/libs/system/example/run_timer_example2.cpp (contents, props changed)
   sandbox/libs/system/example/timex.cpp (contents, props changed)
   sandbox/libs/system/src/
   sandbox/libs/system/src/run_timer.cpp (contents, props changed)
   sandbox/libs/system/src/run_timer_ctors.cpp (contents, props changed)
   sandbox/libs/system/src/timer.cpp (contents, props changed)
   sandbox/libs/system/test/
   sandbox/libs/system/test/Jamfile.v2 (contents, props changed)
   sandbox/libs/system/test/timer_test.cpp (contents, props changed)

Added: sandbox/libs/system/build/Jamfile.v2
==============================================================================
--- (empty file)
+++ sandbox/libs/system/build/Jamfile.v2 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,20 @@
+# Boost System Library Build Jamfile
+
+# (C) Copyright Beman Dawes 2002, 2006
+
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or www.boost.org/LICENSE_1_0.txt)
+
+# See library home page at http://www.boost.org/libs/system
+
+project boost/system
+ : source-location ../src
+ ;
+
+SOURCES = run_timer run_timer_ctors timer ;
+
+lib boost_system
+ : $(SOURCES).cpp
+ : <link>shared:<define>BOOST_SYSTEM_DYN_LINK=1
+ <link>static:<define>BOOST_SYSTEM_STATIC_LINK=1
+ ;

Added: sandbox/libs/system/doc/timer.html
==============================================================================
--- (empty file)
+++ sandbox/libs/system/doc/timer.html 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,431 @@
+<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
+<meta name="ProgId" content="FrontPage.Editor.Document">
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+<title>Boost System Timers</title>
+</head>
+
+<body>
+
+<h1><img border="0" src="../../../boost.png" align="center" width="277" height="86">
+Boost System Timers 
+<a name="Introduction">Introduction</a></h1>
+Knowing how long a program takes to execute is useful in both test and
+production environments. It is also helpful if such timing information is broken down
+into wall clock time, CPU time spent by the user, and CPU time spent by the
+operating system servicing user requests.
+The Boost System Library's timer components provide that information:
+<ul>
+ <li>At the highest level, class <code>run_timer</code> provides a
+ complete run time reporting package that can be invoked in a single line of
+ code. 
+ </li>
+ <li>At a middle level, class <code>timer</code> provides a widely useful timer
+ object abstraction. 
+ </li>
+ <li>At the lowest level, two <code>times</code> functions provide
+ thin wrappers around the operating system's process timer API.</li>
+</ul>
+
+<h2><a name="Example">Example</a>s</h2>
+
+Here is the run_timer_example.cpp
+program supplied with the Boost System library:
+<blockquote>
+ <pre>#include <boost/system/timer.hpp>
+#include <cmath>
+
+int main()
+{
+ boost::system::run_timer t;
+
+ for ( long i = 0; i < 10000000; ++i )
+ std::sqrt( 123.456L ); // burn some time
+
+ return 0;
+}</pre>
+</blockquote>
+When the <code>run_timer t</code> object is created, it starts timing. When
+it is destroyed at the end of the program, its destructor stops the timer and
+displays timing information on cout.
+The output of this program run on a circa 2006 processor looks was this:
+<code>   wall 0.42 s, user 0.41 s + system 0.00 s = total cpu 0.41 s,
+96.3% util</code>
+In other words, this program ran in 0.42 seconds as would be measured by a
+clock on the wall, the operating system charged it for 0.41 seconds of user CPU
+time and 0 seconds of system CPU time, the total of these two was 0.41, and that
+represented 96.3 percent of the wall clock time.
+
+The run_timer_example2.cpp
+program is the same, except that it supplies additional constructor arguments
+from the command line:
+<blockquote>
+ <pre>#include <boost/system/timer.hpp>
+#include <cmath>
+
+int main( int argc, char * argv[] )
+{
+ const char * format = argc > 1 ? argv[1] : "%t cpu seconds\n";
+ int places = argc > 2 ? std::atoi( argv[2] ) : 2;
+
+ boost::system::run_timer t( format, places );
+
+ for ( long i = 0; i < 10000000; ++i )
+ std::sqrt( 123.456L ); // burn some time
+
+ return 0;
+}</pre>
+</blockquote>
+Here is the output for this program for several sets of command line
+arguments:
+<blockquote>
+ <pre>run_timer_example2
+0.42 cpu seconds
+
+run_timer_example2 "%w wall clock seconds\n"
+0.41 wall clock seconds
+
+run_timer_example2 "%w wall clock seconds\n" 6
+0.421875 wall clock seconds
+
+run_timer_example2 "%t total CPU seconds\n" 3
+0.422 total CPU seconds</pre>
+</blockquote>
+<h2>Header
+boost/system/timer.hpp
+synopsis</h2>
+<pre>namespace boost
+{
+ namespace system
+ {
+ typedef implementation-defined microsecond_t;
+
+ struct times_t;
+ class timer;
+ class run_timer;
+
+ struct times_t
+ {
+ microsecond_t wall;
+ microsecond_t user;
+ microsecond_t system;
+ };
+
+ // low-level functions --------------------------------------------//
+
+ void times( times_t & result );
+ error_code & times( times_t & result, error_code & ec );
+
+ // class timer ----------------------------------------------------//
+
+ class timer
+ {
+ public:
+
+ timer();
+ timer( const std::nothrow_t & );
+ ~timer();
+
+ void start();
+ const times_t & stop();
+ bool stopped() const;
+ void elapsed( times_t & result );
+
+ private:
+ times_t m_times; // exposition only
+ };
+
+ // class run_timer ------------------------------------------------//
+
+ class run_timer : public timer
+ {
+ public:
+ explicit run_timer( int places = 2 );
+ run_timer( int places, std::ostream & os );
+
+ explicit run_timer( const std::string & format, int places = 2 );
+ run_timer( const std::string & format, int places, std::ostream & os );
+
+ ~run_timer();
+
+ void report();
+ error_code report( error_code & ec ); // never throws
+
+ private:
+ int m_places; // exposition only
+ std::ostream & m_os; // exposition only
+ std::string m_format; // exposition only
+ };
+
+ } // namespace system
+} // namespace boost
+</pre>
+
+<h3>Typedef <a name="microsecond_t"><code>microsecond_t</code></a></h3>
+
+The typedef <code>microsecond_t</code> provides an implementation defined type capable
+of representing microseconds. For POSIX and Windows systems, <code>
+microseconds_t</code> is <code>boost::int_least64_</code>t.
+
+The underlying type is not based on the Boost Date-Time library to avoid a
+dependency on a large library. This design choice may change at some future
+date.
+
+Although <code>microsecond_t</code> is capable of representing .000001
+second, the actual resolution of common operating system timers is often only
+.015 second.
+
+<h3>Struct <a name="times_t"><code>times_t</code></a></h3>
+
+The struct <code>times_t</code> packages three elapsed times:
+
+<ul>
+ <li>Wall clock elapsed time, equivalent to the time that would be recorded by
+ a stopwatch.</li>
+ <li>User central processing unit (CPU) time used by the process, as charged by
+ the operating system.</li>
+ <li>System central processing unit (CPU) time used by the process, as charged
+ by the operating system.</li>
+</ul>
+
+<h3><a name="Non-member-functions">Non-member functions</a></h3>
+
+These low-level functions are thin wrappers around the operating system's API
+process timing function, such as POSIX <code>times()</code> or <code>Windows
+GetProcessTimes()</code>.
+
+<code>void times( times_t & result );</code>
+
+<blockquote>
+
+Effects: Stores wall-clock, process user CPU, and process system CPU times,
+as reported by the operating system's API process timing function, in r<code>esult</code>.
+
+Throws: <code>boost::system::system::error</code> if the underlying
+operating system API call reports an error.
+
+</blockquote>
+
+<code>error_code & times( times_t & result, error_code & ec );</code>
+
+<blockquote>
+
+Effects: Stores wall-clock, process user CPU, and process system CPU times,
+as reported by the operating system's API process timing function, in r<code>esult</code>.
+If the API call reports an error, sets <code>ec</code> accordingly. Otherwise,
+calls <code>ec.clear()</code>.
+
+</blockquote>
+
+<h3>Class <code><a name="timer">timer</a></code></h3>
+
+A <code>timer</code> object measures wall-clock elapsed time, process elapsed
+time charged to the user, and process elapsed time charged to the system.
+
+Unless otherwise specified, all member functions report errors by throwing <code>system_error</code>
+exceptions. If an error occurs and an exception is not thrown, errors are
+reported by setting time values to -1.
+
+The semantics of member functions are achieved by calling the <code>
+times()</code> function.
+
+<h3>Class <a name="cpu_timer_members"><code>timer</code> members</a></h3>
+
+<code>timer();</code>
+
+<blockquote>
+Effects: <code>start()</code>.
+
+</blockquote>
+
+<code>timer( const std::nothrow_t & );</code>
+
+<blockquote>
+Effects: <code>start()</code>.
+
+Remarks: Member functions for this object will not throw exceptions.
+
+Note: On popular operating systems, such as POSIX and Windows, the question of how to handle errors is moot
+since timer errors do no occur. For programs which may
+run on systems that may possibly report timer errors, the <code>nothrow</code>
+constructor allows suppression of exceptions without the interface thickening
+that would be required if all functions had <code>error_code</code> returning
+variations. In the rare cases where exceptions are undesirable yet the <code>
+error_code</code> must be captured,  the non-member <code>times</code>
+function's overload returning an <code>error_code</code> can be used.
+
+</blockquote>
+<code>~timer();</code>
+
+<blockquote>
+Effects: None.
+
+Throws: Never.
+
+</blockquote>
+<code>void start();</code>
+
+<blockquote>
+Effects: Begins measuring
+wall-clock, user process, and system process elapsed time.
+
+Postconditions: <code>stopped() == false</code>.
+
+</blockquote>
+<code>const times_t & stop();</code>
+
+<blockquote>
+Effects: If <code>!stopped()</code>, stops measuring wall-clock, user
+CPU, and system CPU elapsed time, and stores in a <code>time_t</code> struct the time
+elapsed since the
+preceding invocation of <code>start()</code>. Otherwise, has no effect.
+
+Returns: A reference to the <code>time_t</code> struct.
+
+Postconditions: <code>stopped() == true</code>.
+
+</blockquote>
+
+<code>bool stopped() const;</code>
+
+<blockquote>
+
+Returns: true if <code>stop()</code> has been called subsequent to a call to
+<code>start()</code>, else <code>false</code>.
+
+</blockquote>
+
+<code>void elapsed( times_t & result );</code>
+
+<blockquote>
+
+Effects: Stores wall-clock, process user CPU, and process system CPU elapsed times
+in r<code>esult</code>.
+If <code>stopped() == false,</code> the times are those measured since the
+preceding invocation of <code>start()</code>, otherwise the times are those
+stored by the preceding invocation of <code>stop()</code>.
+
+Remark: Does not call <code>stop()</code>.
+
+</blockquote>
+
+<h3>Class <a name="run_timer">run_timer</a></h3>
+
+Class <code>run_timer</code> inherits publicly from <code><a href="#timer">
+timer</a></code>. For the description of inherited functions, see
+Class timer.
+
+<h3>Class run_timer members</h3>
+
+<pre>explicit run_timer( int places = 2 );</pre>
+<blockquote>
+ Effects: Constructs an object of type <code>run_timer</code>.
+ Postconditions: 
+ <code>  m_places == places, 
+  m_os == std::cout, 
+  m_format == "\nwall %w s, user %u s + system %s s = total cpu %t s, %p%
+ util\n"</code>
+</blockquote>
+<pre>run_timer( int places, std::ostream & os );</pre>
+<blockquote>
+ Effects: Constructs an object of type <code>run_timer</code>.
+ Postconditions: 
+ <code>  m_places == places, 
+  m_os == os, 
+  m_format == "\nwall %w s, user %u s + system %s s = total cpu %t s, %p%
+ util\n"</code>
+</blockquote>
+<pre>explicit run_timer( const std::string & format, int places = 2 );</pre>
+<blockquote>
+ Effects: Constructs an object of type <code>run_timer</code>.
+ Postconditions: 
+ <code>  m_format == format, 
+  m_places == places, 
+  m_os == std::cout  </code>
+</blockquote>
+<pre>run_timer( const std::string & format, int places, std::ostream & os );</pre>
+<blockquote>
+ Effects: Constructs an object of type <code>run_timer</code>.
+ Postconditions: 
+ <code>  m_format == format, 
+  m_places == places, 
+  m_os == os  </code>
+</blockquote>
+<pre>~run_timer();</pre>
+<blockquote>
+ Effects: 
+ <code>  error_code ed; 
+  if ( !stopped() ) report( ec );</code>
+Throws: Never.
+
+</blockquote>
+<pre>void report();</pre>
+<blockquote>
+ Effects: Same as <code>report( error_code & ec )</code>. See below.
+ Note: Does throw on errors.
+</blockquote>
+<pre>error_code report( error_code & ec );</pre>
+<blockquote>
+
+Effects: Displays times on <code>m_os</code>:
+
+ <ul>
+ <li><code>stop()</code>.</li>
+ <li>Saves <code>m_os</code> <code>ios</code> flags and precision.</li>
+ <li>Sets <code>m_os</code>  <code>ios</code> flags and precision as if by:<ul>
+ <li><code>m_os.setf( std::ios_base::fixed, std::ios_base::floatfield )</code></li>
+ <li><code>m_os.precision( m_places )</code></li>
+ </ul>
+ </li>
+ <li>Outputs <code>m_format</code> to <code>m_os</code>, replacing the character
+ sequences shown in the table below with the indicated values.</li>
+ <li>Restores saved <code>iso</code> flags and precision.</li>
+ <li>If an error occurs during output, sets <code>ec</code> to the
+ corresponding error condition. Otherwise, calls <code>ec.clear()</code>.</li>
+</ul>
+
+ <table border="1" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="39%">
+ <tr>
+ <td width="25%">Sequence</td>
+ <td width="75%">Replacement value</td>
+ </tr>
+ <tr>
+ <td width="25%" align="center"><code>%w</code></td>
+ <td width="75%"><code>wall()</code></td>
+ </tr>
+ <tr>
+ <td width="25%" align="center"><code>%u</code></td>
+ <td width="75%"><code>user()</code></td>
+ </tr>
+ <tr>
+ <td width="25%" align="center"><code>%s</code></td>
+ <td width="75%"><code>system()</code></td>
+ </tr>
+ <tr>
+ <td width="25%" align="center"><code>%t</code></td>
+ <td width="75%"><code>user()+system()</code></td>
+ </tr>
+ <tr>
+ <td width="25%" align="center"><code>%p</code></td>
+ <td width="75%">The percentage of <code>wall()</code> represented by by <code>
+ user()+system()</code></td>
+ </tr>
+ </table>
+ Returns: <code>ec</code>
+ Throws: Never.
+</blockquote>
+
+<hr>
+Last revised:
+17 August, 2007
+© Copyright Beman Dawes, 2006
+Distributed under the Boost Software License, Version 1.0. (See accompanying
+file LICENSE_1_0.txt or copy at
+www.boost.org/ LICENSE_1_0.txt)
+
+</body>
+
+</html>
\ No newline at end of file

Added: sandbox/libs/system/example/run_timer_example.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/example/run_timer_example.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,21 @@
+// run_timer_example.cpp ---------------------------------------------------//
+
+// Copyright Beman Dawes 2006
+
+// 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.
+
+#include <boost/system/timer.hpp>
+#include <cmath>
+
+int main()
+{
+ boost::system::run_timer t;
+
+ for ( long i = 0; i < 10000000; ++i )
+ std::sqrt( 123.456L ); // burn some time
+
+ return 0;
+}

Added: sandbox/libs/system/example/run_timer_example2.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/example/run_timer_example2.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,24 @@
+// run_timer_example2.cpp --------------------------------------------------//
+
+// Copyright Beman Dawes 2006
+
+// 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.
+
+#include <boost/system/timer.hpp>
+#include <cmath>
+
+int main( int argc, char * argv[] )
+{
+ const char * format = argc > 1 ? argv[1] : "%t cpu seconds\n";
+ int places = argc > 2 ? std::atoi( argv[2] ) : 2;
+
+ boost::system::run_timer t( format, places );
+
+ for ( long i = 0; i < 10000000; ++i )
+ std::sqrt( 123.456L ); // burn some time
+
+ return 0;
+}

Added: sandbox/libs/system/example/timex.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/example/timex.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,47 @@
+// timex: timed execution program ------------------------------------------//
+
+// Copyright Beman Dawes 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.
+
+#include <boost/system/timer.hpp>
+#include <cstdlib>
+#include <string>
+#include <iostream>
+
+int main( int argc, char * argv[] )
+{
+ if ( argc == 1 )
+ {
+ std::cout << "invoke: timex [-v] command [args...]\n"
+ " command will be executed and timings displayed\n"
+ " -v option causes command and args to be displayed\n";
+ return 1;
+ }
+
+ std::string s;
+
+ bool verbose = false;
+ if ( argc > 1 && *argv[1] == '-' && *(argv[1]+1) == 'v' )
+ {
+ verbose = true;
+ ++argv;
+ --argc;
+ }
+
+ for ( int i = 1; i < argc; ++i )
+ {
+ if ( i > 1 ) s += ' ';
+ s += argv[i];
+ }
+
+ if ( verbose )
+ { std::cout << "command: \"" << s.c_str() << "\"\n"; }
+
+ boost::system::run_timer t;
+
+ return std::system( s.c_str() );
+}

Added: sandbox/libs/system/src/run_timer.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/src/run_timer.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,146 @@
+// boost run_timer.cpp -----------------------------------------------------//
+
+// Copyright Beman Dawes 1994-2006
+
+// 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.
+
+//----------------------------------------------------------------------------//
+
+// define BOOST_SYSTEM_SOURCE so that <boost/system/config.hpp> knows
+// the library is being built (possibly exporting rather than importing code)
+#define BOOST_SYSTEM_SOURCE
+
+#include <boost/system/timer.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/io/ios_state.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/cerrno.hpp>
+#include <cstring>
+#include <cassert>
+
+using boost::system::microsecond_t;
+using boost::system::times_t;
+
+# if defined(BOOST_WINDOWS_API)
+# include <windows.h>
+# elif defined(BOOST_POSIX_API)
+# include <sys/times.h>
+# else
+# error unknown API
+# endif
+
+namespace
+{
+ const char * default_format =
+ "\nwall %w s, user %u s + system %s s = total cpu %t s, %p% util\n";
+
+# if defined(BOOST_POSIX_API)
+ long tick_factor() // multiplier to convert ticks
+ // to microseconds; -1 if unknown
+ {
+ static long tick_factor = 0;
+ if ( !tick_factor )
+ {
+ if ( (tick_factor = ::sysconf( _SC_CLK_TCK )) <= 0 )
+ tick_factor = -1;
+ else
+ {
+ assert( tick_factor <= 1000000L ); // doesn't handle large ticks
+ tick_factor = 1000000L / tick_factor; // compute factor
+ if ( !tick_factor ) tick_factor = -1;
+ }
+ }
+ return tick_factor;
+ }
+# endif
+
+void show_time( const char * format, int places, std::ostream & os,
+ const times_t & times )
+ // NOTE WELL: Will truncate least-significant digits to LDBL_DIG, which may
+ // be as low as 10, although will be 15 for many common platforms.
+ {
+ if ( times.wall < microsecond_t(0) ) return;
+ if ( places > 6 ) places = 6;
+ else if ( places < 0 ) places = 0;
+
+ boost::io::ios_flags_saver ifs( os );
+ boost::io::ios_precision_saver ips( os );
+ os.setf( std::ios_base::fixed, std::ios_base::floatfield );
+ os.precision( places );
+
+ const long double sec = 1000000.0L;
+ microsecond_t total = times.system + times.user;
+
+ for ( ; *format; ++format )
+ {
+ if ( *format != '%' || !*(format+1) || !std::strchr("wustp", *(format+1)) )
+ os << *format;
+ else
+ {
+ ++format;
+ switch ( *format )
+ {
+ case 'w':
+ os << times.wall / sec;
+ break;
+ case 'u':
+ os << times.user / sec;
+ break;
+ case 's':
+ os << times.system / sec;
+ break;
+ case 't':
+ os << total / sec;
+ break;
+ case 'p':
+ os.precision( 1 );
+ if ( times.wall && total )
+ os << static_cast<long double>(total) /times. wall * 100.0;
+ else
+ os << 0.0;
+ os.precision( places );
+ break;
+ default:
+ assert(0);
+ }
+ }
+ }
+ }
+
+} // unnamed namespace
+
+namespace boost
+{
+ namespace system
+ {
+ // run_timer:: report --------------------------------------//
+
+ void run_timer::report()
+ {
+ show_time( m_format.empty()
+ ? default_format
+ : m_format.c_str(),
+ m_places, m_os, this->stop() );
+ }
+
+ error_code run_timer::report( error_code & ec )
+ {
+ try
+ {
+ report();
+ ec = error_code();
+ }
+
+ catch (...) // eat any exceptions
+ {
+ ec = error_code( EIO, errno_ecat );
+ }
+
+ return ec;
+ }
+
+ } // namespace system
+} // namespace boost

Added: sandbox/libs/system/src/run_timer_ctors.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/src/run_timer_ctors.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,37 @@
+// boost run_timer_ctors.cpp -----------------------------------------------//
+
+// Copyright Beman Dawes 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.
+
+//----------------------------------------------------------------------------//
+
+// These constructors are in a separate file so that this translation unit will
+// not be linked in except when one of the constructors is actually used. This
+// is important since header <iostream> is required, and it incurs the cost of
+// the standard stream objects even if they are not used.
+
+//----------------------------------------------------------------------------//
+
+// define BOOST_SYSTEM_SOURCE so that <boost/system/config.hpp> knows
+// the library is being built (possibly exporting rather than importing code)
+#define BOOST_SYSTEM_SOURCE
+
+#include <boost/system/timer.hpp>
+#include <iostream>
+
+namespace boost
+{
+ namespace system
+ {
+ run_timer::run_timer( int places )
+ : m_places(places), m_os(std::cout) {}
+
+ run_timer::run_timer( const std::string & format, int places )
+ : m_places(places), m_os(std::cout), m_format(format) {}
+
+ } // namespace system
+} // namespace boost

Added: sandbox/libs/system/src/timer.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/src/timer.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,141 @@
+// boost timer.cpp ---------------------------------------------------------//
+
+// Copyright Beman Dawes 1994-2006
+
+// 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.
+
+//----------------------------------------------------------------------------//
+
+// define BOOST_SYSTEM_SOURCE so that <boost/system/config.hpp> knows
+// the library is being built (possibly exporting rather than importing code)
+#define BOOST_SYSTEM_SOURCE
+
+#include <boost/system/timer.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/io/ios_state.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/cerrno.hpp>
+#include <cstring>
+#include <cassert>
+
+# if defined(BOOST_WINDOWS_API)
+# include <windows.h>
+# elif defined(BOOST_POSIX_API)
+# include <sys/times.h>
+# else
+# error unknown API
+# endif
+
+namespace boost
+{
+ namespace system
+ {
+
+ BOOST_SYSTEM_DECL
+ void times( times_t & current )
+ {
+ error_code ec;
+ if ( times( current, ec ) )
+ boost::throw_exception( system_error( ec, "boost::system::times" ) );
+ }
+
+ BOOST_SYSTEM_DECL
+ error_code & times( times_t & current, error_code & ec )
+ {
+ ec = error_code();
+# if defined(BOOST_WINDOWS_API)
+ ::GetSystemTimeAsFileTime( (LPFILETIME)&current.wall );
+ FILETIME creation, exit;
+ if ( ::GetProcessTimes( ::GetCurrentProcess(), &creation, &exit,
+ (LPFILETIME)&current.system, (LPFILETIME)&current.user ) )
+ {
+ current.wall /= 10; // Windows uses 100 nanosecond ticks
+ current.user /= 10;
+ current.system /= 10;
+ }
+ else
+ {
+ ec = error_code( ::GetLastError(), native_ecat );
+ current.wall = current.system = current.user = microsecond_t(-1);
+ }
+# else
+ tms tm;
+ clock_t c = ::times( &tm );
+ if ( c == -1 ) // error
+ {
+ ec = error_code( errno, native_ecat );
+ current.wall = current.system = current.user = microsecond_t(-1);
+ }
+ else
+ {
+ current.wall = microsecond_t(c);
+ current.system = microsecond_t(tm.tms_stime + tm.tms_cstime);
+ current.user = microsecond_t(tm.tms_utime + tm.tms_cutime);
+ if ( tick_factor() != -1 )
+ {
+ current.wall *= tick_factor();
+ current.user *= tick_factor();
+ current.system *= tick_factor();
+ }
+ else
+ {
+ ec = error_code( errno, native_ecat );
+ current.wall = current.user = current.system = microsecond_t(-1);
+ }
+ }
+# endif
+ return ec;
+ }
+
+#define BOOST_TIMES(C) \
+ if ( m_flags & m_nothrow ) \
+ { \
+ error_code ec; \
+ times( C, ec ); \
+ } \
+ else \
+ times( C );
+
+ // timer ---------------------------------------------------------------//
+
+ void timer::start()
+ {
+ m_flags = static_cast<m_flags_t>(m_flags & ~m_stopped);
+ BOOST_TIMES( m_times );
+ }
+
+ const times_t & timer::stop()
+ {
+ if ( stopped() ) return m_times;
+ m_flags = static_cast<m_flags_t>(m_flags | m_stopped);
+
+ times_t current;
+ BOOST_TIMES( current );
+ m_times.wall = (current.wall - m_times.wall);
+ m_times.user = (current.user - m_times.user);
+ m_times.system = (current.system - m_times.system);
+ return m_times;
+ }
+
+ void timer::elapsed( times_t & current )
+ {
+ if ( stopped() )
+ {
+ current.wall = m_times.wall;
+ current.user = m_times.user;
+ current.system = m_times.system;
+ }
+ else
+ {
+ BOOST_TIMES( current );
+ current.wall -= m_times.wall;
+ current.user -= m_times.user;
+ current.system -= m_times.system;
+ }
+ }
+
+ } // namespace system
+} // namespace boost

Added: sandbox/libs/system/test/Jamfile.v2
==============================================================================
--- (empty file)
+++ sandbox/libs/system/test/Jamfile.v2 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,41 @@
+# Boost System Library test Jamfile
+
+# Copyright Beman Dawes 2003, 2006
+
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt
+
+# See library home page at http://www.boost.org/libs/system
+
+project
+ : requirements
+ <library>/boost/system//boost_system
+ <define>BOOST_ALL_NO_LIB
+ ;
+
+ test-suite "system"
+ : [ run error_code_test.cpp
+ : : : <define>BOOST_SYSTEM_STATIC_LINK
+ <runtime-link>static <link>static
+ ]
+ [ run error_code_test.cpp
+ : : : <define>BOOST_SYSTEM_DYN_LINK
+ : error_code_test_dll
+ ]
+ [ run error_code_user_test.cpp
+ : : : <define>BOOST_SYSTEM_STATIC_LINK
+ <runtime-link>static <link>static
+ ]
+ [ run error_code_user_test.cpp
+ : : : <define>BOOST_SYSTEM_DYN_LINK
+ : error_code_user_test_dll
+ ]
+ [ run system_error_test.cpp
+ : : : <define>BOOST_SYSTEM_STATIC_LINK
+ <runtime-link>static <link>static
+ ]
+ [ run system_error_test.cpp
+ : : : <define>BOOST_SYSTEM_DYN_LINK
+ : system_error_test_dll
+ ]
+ ;

Added: sandbox/libs/system/test/timer_test.cpp
==============================================================================
--- (empty file)
+++ sandbox/libs/system/test/timer_test.cpp 2007-08-27 20:08:40 EDT (Mon, 27 Aug 2007)
@@ -0,0 +1,54 @@
+// boost timer_test.cpp ----------------------------------------------------//
+
+// Copyright Beman Dawes 2006
+
+// 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.
+
+#include <boost/system/timer.hpp>
+#include <cstdlib> // for atol()
+#include <iostream>
+#include <locale>
+
+using boost::system::microsecond_t;
+using boost::system::times_t;
+using boost::system::timer;
+using boost::system::run_timer;
+
+int main( int argc, char * argv[] )
+{
+ std::locale loc( "" );
+ std::cout.imbue( loc );
+
+ run_timer timer(6);
+ run_timer timer2("\nwall %w s, utilization %p%\n");
+ run_timer timer3("\nwall %w s, total cpu %t s, utilization %p%\n", 3);
+
+ long count = 0;
+ times_t times;
+ times.wall = 0;
+ microsecond_t timeout
+ = microsecond_t(500000); // default .5 seconds
+
+ if ( argc > 1 ) timeout = microsecond_t(std::atol( argv[1] ));
+
+ while ( times.wall < timeout )
+ {
+ // The point of this code is to burn both kernal and user cpu time,
+ // with the total less than wall clock time.
+ ++count;
+ timer.elapsed( times );
+ // sleep(1);
+ std::cout << "iteration " << count << ", "
+ << times.wall << " wall, "
+ << times.user << " user, "
+ << times.system << " system microsecs"
+ << std::endl;
+ }
+
+ std::cout << count << " iterations\n";
+ return 0;
+}
+

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