commit aa0e7dad62bf078ca122bb7b91c03a74825b9433
author Alexander Afanasyev <alexander.afanasyev@ucla.edu> Mon Mar 17 14:37:33 2014 -0700
committer Alexander Afanasyev <alexander.afanasyev@ucla.edu> Tue Mar 18 16:19:53 2014 -0700
tree 3be0c32ca2f5b89c99525b2901ea61183b7131a9
parent 6e0c5a5e470795fa0f743366bfd400809ba1a001

all: Refactoring work with time using boost::chrono

Now the library has two clocks: time::steady_clock and
time::system_clock, following (boost|std)::chrono.  In addition to
standard now() method, the library contains several helpers to convert
to/from UnixTimestamp (microsecond resolution) and IsoString (optional
microsecond resolution).  The IsoString conversions use
boost::posix_time routines, since boost::chrono supports extended IO
support only starting boost version 1.52 (Boost Chrono V2).

This commit breaks compatibility with previous API.  All time-related
Data/Interest calls must explicitly use time units to specify
FreshnessPeriod/InterestLifetime.

Brief usage/conversion guide:

- creation of time units does not support double/float types.  If
  necessary to create time unit from double, ``ndn::duration<double>`` (for
  seconds) needs to be used instead.  In some cases, this would also
  require ``ndn::duration_cast``, if the target is not ``ndn::nanoseconds``.
- ndn::getNow, ndn::ndn_getNowMilliseconds, ndn::time::now are all
  removed in favor of the now() method in a specific clock:

    * time::system_clock::now();
    * time::steady_clock::now();

- When necessary to convert system_clock::TimePoint to unix timestamp,
  ``time::toUnixTimestamp`` can be used.  This method return number of
  milliseconds since UNIX epoch as ``ndn::time::milliseconds`` type.
  Use count() method to obtain number as an integral value.

Change-Id: Icd688bc6766e008d60c3d2888173627874526e47
Refs: #1152

src/util/scheduler.hpp

diff --git a/src/util/scheduler.hpp b/src/util/scheduler.hpp
index 18c3004..b7364ce 100644
--- a/src/util/scheduler.hpp
+++ b/src/util/scheduler.hpp
@@ -33,7 +33,7 @@
    * \returns EventId that can be used to cancel the scheduled event
    */
   EventId
-  scheduleEvent(const time::Duration& after, const Event& event);
+  scheduleEvent(const time::nanoseconds& after, const Event& event);
 
   /**
    * \brief Schedule periodic event that should be fired every specified period.
@@ -41,8 +41,8 @@
    * \returns EventId that can be used to cancel the scheduled event
    */
   EventId
-  schedulePeriodicEvent(const time::Duration& after,
-                        const time::Duration& period,
+  schedulePeriodicEvent(const time::nanoseconds& after,
+                        const time::nanoseconds& period,
                         const Event& event);
   
   /**
@@ -60,10 +60,11 @@
 
   struct EventInfo
   {
-    EventInfo(const time::Duration& after,
-              const time::Duration& period,
+    EventInfo(const time::nanoseconds& after,
+              const time::nanoseconds& period,
               const Event& event);
-    EventInfo(const time::Point& when, const EventInfo& previousEvent);
+
+    EventInfo(const time::steady_clock::TimePoint& when, const EventInfo& previousEvent);
 
     bool
     operator <=(const EventInfo& other) const
@@ -77,11 +78,11 @@
       return this->m_scheduledTime < other.m_scheduledTime;
     }
 
-    time::Duration
+    time::nanoseconds
     expiresFromNow() const;
     
-    time::Point m_scheduledTime;
-    time::Duration m_period;
+    time::steady_clock::TimePoint m_scheduledTime;
+    time::nanoseconds m_period;
     Event m_event;
     mutable EventId m_eventId;
   };
@@ -91,7 +92,7 @@
 
   EventQueue m_events;
   EventQueue::iterator m_scheduledEvent;
-  boost::asio::monotonic_deadline_timer m_deadlineTimer;
+  monotonic_deadline_timer m_deadlineTimer;
 
   bool m_isEventExecuting;
 };