Dogcows Code - chaz/openbox/blob - src/Timer.hh

   1 // -*- mode: C++; indent-tabs-mode: nil; -*-
   2 // Timer.hh for Blackbox - An X11 Window Manager
   3 // Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org>
   4 // Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a
   7 // copy of this software and associated documentation files (the "Software"),
   8 // to deal in the Software without restriction, including without limitation
   9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 // and/or sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 // DEALINGS IN THE SOFTWARE.
  23
  24 #ifndef   _BLACKBOX_Timer_hh
  25 #define   _BLACKBOX_Timer_hh
  26
  27 extern "C" {
  28 #ifdef    TIME_WITH_SYS_TIME
  29 #  include <sys/time.h>
  30 #  include <time.h>
  31 #else // !TIME_WITH_SYS_TIME
  32 #  ifdef    HAVE_SYS_TIME_H
  33 #    include <sys/time.h>
  34 #  else // !HAVE_SYS_TIME_H
  35 #    include <time.h>
  36 #  endif // HAVE_SYS_TIME_H
  37 #endif // TIME_WITH_SYS_TIME
  38 }
  39
  40 // forward declaration
  41 class TimerQueueManager;
  42
  43 class TimeoutHandler {
  44 public:
  45   virtual void timeout(void) = 0;
  46 };
  47
  48 class BTimer {
  49 private:
  50   TimerQueueManager *manager;
  51   TimeoutHandler *handler;
  52   bool timing, recur;
  53
  54   timeval _start, _timeout;
  55
  56   BTimer(const BTimer&);
  57   BTimer& operator=(const BTimer&);
  58
  59 public:
  60   BTimer(TimerQueueManager *m, TimeoutHandler *h);
  61   virtual ~BTimer(void);
  62
  63   void fireTimeout(void);
  64
  65   inline bool isTiming(void) const { return timing; }
  66   inline bool isRecurring(void) const { return recur; }
  67
  68   inline const timeval &getTimeout(void) const { return _timeout; }
  69   inline const timeval &getStartTime(void) const { return _start; }
  70
  71   timeval timeRemaining(const timeval &tm) const;
  72   bool shouldFire(const timeval &tm) const;
  73   timeval endpoint(void) const;
  74
  75   inline void recurring(bool b) { recur = b; }
  76
  77   void setTimeout(long t);
  78   void setTimeout(const timeval &t);
  79
  80   void start(void);  // manager acquires timer
  81   void stop(void);   // manager releases timer
  82   void halt(void);   // halts the timer
  83
  84   bool operator<(const BTimer& other) const
  85   { return shouldFire(other.endpoint()); }
  86 };
  87
  88
  89 #include <queue>
  90 #include <algorithm>
  91
  92 template <class _Tp, class _Sequence, class _Compare>
  93 class _timer_queue: protected std::priority_queue<_Tp, _Sequence, _Compare> {
  94 public:
  95   typedef std::priority_queue<_Tp, _Sequence, _Compare> _Base;
  96
  97   _timer_queue(void): _Base() {}
  98   ~_timer_queue(void) {}
  99
 100   void release(const _Tp& value) {
 101     c.erase(std::remove(c.begin(), c.end(), value), c.end());
 102     // after removing the item we need to make the heap again
 103     std::make_heap(c.begin(), c.end(), comp);
 104   }
 105   bool empty(void) const { return _Base::empty(); }
 106   size_t size(void) const { return _Base::size(); }
 107   void push(const _Tp& value) { _Base::push(value); }
 108   void pop(void) { _Base::pop(); }
 109   const _Tp& top(void) const { return _Base::top(); }
 110 private:
 111   // no copying!
 112   _timer_queue(const _timer_queue&) {}
 113   _timer_queue& operator=(const _timer_queue&) {}
 114 };
 115
 116 struct TimerLessThan {
 117   bool operator()(const BTimer* const l, const BTimer* const r) const {
 118     return *r < *l;
 119   }
 120 };
 121
 122 #include <deque>
 123 typedef _timer_queue<BTimer*, std::deque<BTimer*>, TimerLessThan> TimerQueue;
 124
 125 class TimerQueueManager {
 126 public:
 127   virtual void addTimer(BTimer* timer) = 0;
 128   virtual void removeTimer(BTimer* timer) = 0;
 129 };
 130
 131 #endif // _BLACKBOX_Timer_hh