libcore/Timers.cpp

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   3 //   Free Software   Foundation, Inc
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.    See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19 //
  20 //
  21
  22 #include "Timers.h"
  23 #include "log.h"
  24 #include "fn_call.h"
  25 #include "VM.h"
  26 #include "movie_root.h"
  27 #include "Global_as.h"
  28 #include "as_function.h"
  29
  30 #include <limits> // for numeric_limits
  31 #include <functional>
  32 #include <algorithm>
  33
  34 namespace gnash {
  35
  36 Timer::~Timer()
  37 {
  38 }
  39
  40 Timer::Timer(as_function& method, unsigned long ms,
  41         as_object* this_ptr, fn_call::Args args, bool runOnce)
  42     :
  43     _interval(ms),
  44     _start(std::numeric_limits<unsigned long>::max()),
  45     _function(&method),
  46     _methodName(),
  47     _object(this_ptr),
  48     _args(std::move(args)),
  49     _runOnce(runOnce)
  50 {
  51     start();
  52 }
  53
  54 Timer::Timer(as_object* this_ptr, ObjectURI methodName,
  55         unsigned long ms, fn_call::Args args, bool runOnce)
  56     :
  57     _interval(ms),
  58     _start(std::numeric_limits<unsigned long>::max()),
  59     _function(nullptr),
  60     _methodName(std::move(methodName)),
  61     _object(this_ptr),
  62     _args(std::move(args)),
  63     _runOnce(runOnce)
  64 {
  65     start();
  66 }
  67
  68 void
  69 Timer::clearInterval()
  70 {
  71     _interval = 0;
  72     _start = std::numeric_limits<unsigned long>::max();
  73 }
  74
  75 void
  76 Timer::start()
  77 {
  78     _start = getVM(*_object).getTime();
  79 }
  80
  81
  82 bool
  83 Timer::expired(unsigned long now, unsigned long& elapsed)
  84 {
  85     if (cleared()) return false;
  86     long unsigned expTime = _start + _interval;
  87     if (now < expTime) return false;
  88     elapsed = expTime-now;
  89     return true;
  90 }
  91
  92 void
  93 Timer::executeAndReset()
  94 {
  95     if (cleared()) return;
  96     execute();
  97     if (_runOnce) clearInterval();
  98     else _start += _interval; // reset the timer
  99 }
 100
 101 void
 102 Timer::execute()
 103 {
 104
 105     // If _function is not 0, _methodName should be 0 anyway, but the
 106     // ternary operator is there for clarity.
 107     as_object* super = _function ? _object->get_super()
 108                                  : _object->get_super(_methodName);
 109     VM& vm = getVM(*_object);
 110
 111     as_value timer_method = _function ? _function :
 112                                         getMember(*_object, _methodName);
 113
 114     as_environment env(vm);
 115
 116     // Copy args
 117     fn_call::Args argsCopy(_args);
 118
 119     invoke(timer_method, env, _object, argsCopy, super);
 120
 121 }
 122
 123 void
 124 Timer::markReachableResources() const
 125 {
 126     _args.setReachable();
 127
 128     if (_function) _function->setReachable();
 129     if (_object) _object->setReachable();
 130 }
 131
 132 } // namespace gnash