LeechCraft  0.6.70-3565-g2d86529
Modular cross-platform feature rich live environment.
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queuemanager.cpp
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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  , ReqTimer_ (new QTimer (this))
41  , Paused_ (false)
42  {
43  ReqTimer_->setSingleShot (true);
44  connect (ReqTimer_,
45  SIGNAL (timeout ()),
46  this,
47  SLOT (exec ()));
48  }
49 
50  void QueueManager::Schedule (std::function<void ()> f, QObject *dep, QueuePriority prio)
51  {
52  const auto& now = QDateTime::currentDateTime ();
53 
54  if (prio == QueuePriority::High)
55  Queue_.prepend ({ f, dep ? OptionalTracker_t { dep } : OptionalTracker_t () });
56  else
57  Queue_.append ({ f, dep ? OptionalTracker_t { dep } : OptionalTracker_t () });
58 
59  const auto diff = LastRequest_.msecsTo (now);
60  if (diff >= Timeout_)
61  exec ();
62  else if (Queue_.size () == 1)
63  ReqTimer_->start (Timeout_ - diff);
64  }
65 
67  {
68  Queue_.clear ();
69  }
70 
72  {
73  Paused_ = true;
74  ReqTimer_->stop ();
75  }
76 
77  bool QueueManager::IsPaused () const
78  {
79  return Paused_;
80  }
81 
83  {
84  Paused_ = false;
85  ReqTimer_->start (Timeout_);
86  }
87 
88  void QueueManager::exec ()
89  {
90  if (Queue_.isEmpty ())
91  return;
92 
93  if (Paused_)
94  return;
95 
96  const auto& pair = Queue_.takeFirst ();
97  if (pair.second && !*pair.second)
98  {
99  exec ();
100  return;
101  }
102 
103  pair.first ();
104  LastRequest_ = QDateTime::currentDateTime ();
105 
106  if (!Queue_.isEmpty ())
107  ReqTimer_->start (Timeout_);
108  }
109 }
110 }
void Schedule(std::function< void()> functor, QObject *dependent=0, QueuePriority prio=QueuePriority::Normal)
Adds the given functor.
bool IsPaused() const
Checks if the queue is paused.
void Pause()
Pauses the queue rotation.
void Clear()
Clears the queue.
QueuePriority
The priority of the action in the queue.
Definition: queuemanager.h:48
QueueManager(int timeout, QObject *parent=nullptr)
Creates a queue manager with the given timeout.
void Resume()
Continues the queue rotation.