LeechCraft  %{LEECHCRAFT_VERSION}
Modular cross-platform feature rich live environment.
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queuemanager.cpp
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1 /**********************************************************************
2  * LeechCraft - modular cross-platform feature rich internet client.
3  * Copyright (C) 2006-2013 Georg Rudoy
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5  * Boost Software License - Version 1.0 - August 17th, 2003
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29 
30 #include "queuemanager.h"
31 #include <QTimer>
32 
33 namespace LeechCraft
34 {
35 namespace Util
36 {
37  QueueManager::QueueManager (int timeout, QObject *parent)
38  : QObject (parent)
39  , Timeout_ (timeout)
40  {
41  }
42 
43  void QueueManager::Schedule (std::function<void ()> f, QObject *dep)
44  {
45  const auto& now = QDateTime::currentDateTime ();
46  Queue_.push_back ({ f, dep ? OptionalTracker_t { dep } : OptionalTracker_t () });
47 
48  const auto diff = LastRequest_.msecsTo (now);
49  if (diff >= Timeout_)
50  exec ();
51  else if (Queue_.size () == 1)
52  QTimer::singleShot (Timeout_ - diff,
53  this,
54  SLOT (exec ()));
55  }
56 
57  void QueueManager::exec ()
58  {
59  if (Queue_.isEmpty ())
60  return;
61 
62  const auto& pair = Queue_.takeFirst ();
63  if (pair.second && !*pair.second)
64  {
65  exec ();
66  return;
67  }
68 
69  pair.first ();
70  LastRequest_ = QDateTime::currentDateTime ();
71 
72  if (!Queue_.isEmpty ())
73  QTimer::singleShot (Timeout_,
74  this,
75  SLOT (exec ()));
76  }
77 }
78 }
UTIL_API void Schedule(std::function< void()> functor, QObject *dependent=0)
Adds the given functor.
UTIL_API QueueManager(int timeout, QObject *parent=0)
Creates a queue manager with the given timeout.