[boost] [Review] Formal Review of Proposed Boost.Chrono Library Starts TOMORROW
Hi everyone,
The review of Vicente Botet's Chrono library starts TOMORROW (November
6th) and lasts until November 15th unless an extension occurs.
What is it?
========
Boost.Chrono aims to implement the new time facilities in C++0x, as
proposed in N2661 - A Foundation to Sleep On
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2661.htm). That
document provides background and motivation for key design decisions and
is the source of a good deal of information in this documentation.
See the current C++0x working draft at
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3126.pdf for
details of what was accepted.
The Boost.Chrono library provides:
* A means to represent time durations: managed by the generic
duration class . Examples of time durations include days, minutes,
seconds and nanoseconds, which can be represented with a fixed
number of clock ticks per unit. All of these units of time
duration are united with a generic interface by the duration
facility.
* A type for representing points in time: time_point. A time_point
represents an epoch plus or minus a duration. The library leaves
epochs unspecified. A time_point is associated with a clock.
* Several clocks, some of which may not be available on a particular
platform: system_clock, monotonic_clock and
high_resolution_clock. A clock is a pairing of a time_point and
duration, and a function which returns a time_point representing
now.
* To make the timing facilities more generally useful, Boost.Chrono
provides a number of additional clocks that are thin wrappers
around the operating system's time APIs, thereby allowing the
extraction of read (wall clock) time, user CPU time, system CPU
time,
- process_real_cpu_clock, captures real (wall clock) CPU times.
- process_user_cpu_clock, captures user-CPU times.
- process_system_cpu_clock, captures system-CPU times.
- A tuple-like class __process_cpuclock_, that captures real,
user-CPU, and system-CPU times together.
- A thread_clock thread monotonic clock, when supported by a platform.
* Boost.Chrono also includes typeof registration for duration and
time_point to permit using emulated auto with C++03 compilers.
* Boost.Chrono also provides I/O for duration and time_point. It
builds on
participants (1)
-
Anthony Williams