357 lines
10 KiB
Plaintext
357 lines
10 KiB
Plaintext
// boost process_cpu_clocks.cpp -----------------------------------------------------------//
|
|
|
|
// Copyright Beman Dawes 1994, 2006, 2008
|
|
// Copyright Vicente J. Botet Escriba 2009
|
|
|
|
// 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/process_cpu_clocks.hpp>
|
|
#include <boost/assert.hpp>
|
|
|
|
#include <sys/time.h> //for gettimeofday and timeval
|
|
#include <sys/times.h> //for times
|
|
# include <unistd.h>
|
|
|
|
namespace boost
|
|
{
|
|
namespace chrono
|
|
{
|
|
namespace chrono_detail
|
|
{
|
|
|
|
inline long tick_factor() // multiplier to convert ticks
|
|
// to nanoseconds; -1 if unknown
|
|
{
|
|
long factor = 0;
|
|
if (!factor)
|
|
{
|
|
if ((factor = ::sysconf(_SC_CLK_TCK)) <= 0)
|
|
factor = -1;
|
|
else
|
|
{
|
|
BOOST_ASSERT(factor <= 1000000000l); // doesn't handle large ticks
|
|
factor = 1000000000l / factor; // compute factor
|
|
if (!factor)
|
|
factor = -1;
|
|
}
|
|
}
|
|
return factor;
|
|
}
|
|
}
|
|
|
|
|
|
process_real_cpu_clock::time_point process_real_cpu_clock::now() BOOST_NOEXCEPT
|
|
{
|
|
#if 1
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
return time_point(nanoseconds(c * factor));
|
|
} else
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
}
|
|
}
|
|
return time_point();
|
|
#else
|
|
clock_t c = ::clock();
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
return time_point(nanoseconds(c * factor));
|
|
} else
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
}
|
|
}
|
|
return time_point();
|
|
#endif
|
|
}
|
|
|
|
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
|
|
process_real_cpu_clock::time_point process_real_cpu_clock::now(system::error_code & ec)
|
|
{
|
|
|
|
#if 1
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_real_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
if (!BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
ec.clear();
|
|
}
|
|
return time_point(nanoseconds(c * factor));
|
|
} else
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_real_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
}
|
|
}
|
|
#else
|
|
clock_t c = ::clock();
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_real_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
if (!BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
ec.clear();
|
|
}
|
|
return time_point(nanoseconds(c * factor));
|
|
} else
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_real_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
}
|
|
#endif
|
|
|
|
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
|
|
process_user_cpu_clock::time_point process_user_cpu_clock::now(system::error_code & ec)
|
|
{
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_user_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
if (!BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
ec.clear();
|
|
}
|
|
return time_point(nanoseconds((tm.tms_utime + tm.tms_cutime) * factor));
|
|
} else
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_user_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
process_user_cpu_clock::time_point process_user_cpu_clock::now() BOOST_NOEXCEPT
|
|
{
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
return time_point(nanoseconds((tm.tms_utime + tm.tms_cutime)
|
|
* factor));
|
|
} else
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
}
|
|
}
|
|
return time_point();
|
|
}
|
|
process_system_cpu_clock::time_point process_system_cpu_clock::now() BOOST_NOEXCEPT
|
|
{
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
return time_point(nanoseconds((tm.tms_stime + tm.tms_cstime)
|
|
* factor));
|
|
} else
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
}
|
|
}
|
|
return time_point();
|
|
}
|
|
|
|
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
|
|
process_system_cpu_clock::time_point process_system_cpu_clock::now(system::error_code & ec)
|
|
{
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_system_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
if (!BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
ec.clear();
|
|
}
|
|
return time_point(nanoseconds((tm.tms_stime + tm.tms_cstime) * factor));
|
|
} else
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_system_cpu_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
process_cpu_clock::time_point process_cpu_clock::now() BOOST_NOEXCEPT
|
|
{
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
time_point::rep
|
|
r(c * factor, (tm.tms_utime + tm.tms_cutime) * factor, (tm.tms_stime
|
|
+ tm.tms_cstime) * factor);
|
|
return time_point(duration(r));
|
|
} else
|
|
{
|
|
BOOST_ASSERT(0 && "Boost::Chrono - Internal Error");
|
|
}
|
|
}
|
|
return time_point();
|
|
}
|
|
|
|
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
|
|
process_cpu_clock::time_point process_cpu_clock::now(system::error_code & ec)
|
|
{
|
|
|
|
tms tm;
|
|
clock_t c = ::times(&tm);
|
|
if (c == clock_t(-1)) // error
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
} else
|
|
{
|
|
long factor = chrono_detail::tick_factor();
|
|
if (factor != -1)
|
|
{
|
|
time_point::rep
|
|
r(c * factor, (tm.tms_utime + tm.tms_cutime) * factor, (tm.tms_stime
|
|
+ tm.tms_cstime) * factor);
|
|
return time_point(duration(r));
|
|
} else
|
|
{
|
|
if (BOOST_CHRONO_IS_THROWS(ec))
|
|
{
|
|
boost::throw_exception(system::system_error(errno, BOOST_CHRONO_SYSTEM_CATEGORY, "chrono::process_clock"));
|
|
} else
|
|
{
|
|
ec.assign(errno, BOOST_CHRONO_SYSTEM_CATEGORY);
|
|
return time_point();
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
}
|
|
}
|