1 files changed, 132 insertions, 0 deletions
diff --git a/src/Timer.hh b/src/Timer.hh
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+++ b/src/Timer.hh
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+// -*- mode: C++; indent-tabs-mode: nil; -*-
+// Timer.hh for Blackbox - An X11 Window Manager
+// Copyright (c) 2003 Kensuke Matsuzaki <zakki@peppermint.jp>
+// Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org>
+// Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#ifndef   _BLACKBOX_Timer_hh
+#define   _BLACKBOX_Timer_hh
+
+extern "C" {
+#ifdef    TIME_WITH_SYS_TIME
+#  include <sys/time.h>
+#  include <time.h>
+#else // !TIME_WITH_SYS_TIME
+#  ifdef    HAVE_SYS_TIME_H
+#    include <sys/time.h>
+#  else // !HAVE_SYS_TIME_H
+#    include <time.h>
+#  endif // HAVE_SYS_TIME_H
+#endif // TIME_WITH_SYS_TIME
+}
+
+// forward declaration
+class TimerQueueManager;
+
+class TimeoutHandler {
+public:
+  virtual void timeout(void) = 0;
+};
+
+class BTimer {
+private:
+  TimerQueueManager *manager;
+  TimeoutHandler *handler;
+  bool timing, recur;
+
+  timeval _start, _timeout;
+
+  BTimer(const BTimer&);
+  BTimer& operator=(const BTimer&);
+
+public:
+  BTimer(TimerQueueManager *m, TimeoutHandler *h);
+  virtual ~BTimer(void);
+
+  void fireTimeout(void);
+
+  inline bool isTiming(void) const { return timing; }
+  inline bool isRecurring(void) const { return recur; }
+
+  inline const timeval &getTimeout(void) const { return _timeout; }
+  inline const timeval &getStartTime(void) const { return _start; }
+
+  timeval timeRemaining(const timeval &tm) const;
+  bool shouldFire(const timeval &tm) const;
+  timeval endpoint(void) const;
+
+  inline void recurring(bool b) { recur = b; }
+
+  void setTimeout(long t);
+  void setTimeout(const timeval &t);
+
+  void start(void);  // manager acquires timer
+  void stop(void);   // manager releases timer
+  void halt(void);   // halts the timer
+
+  bool operator<(const BTimer& other) const
+  { return shouldFire(other.endpoint()); }
+};
+
+
+#include <queue>
+#include <algorithm>
+
+template <class _Tp, class _Sequence, class _Compare>
+class _timer_queue: protected std::priority_queue<_Tp, _Sequence, _Compare> {
+public:
+  typedef std::priority_queue<_Tp, _Sequence, _Compare> _Base;
+
+  _timer_queue(void): _Base() {}
+  ~_timer_queue(void) {}
+
+  void release(const _Tp& value) {
+    c.erase(std::remove(c.begin(), c.end(), value), c.end());
+    // after removing the item we need to make the heap again
+    std::make_heap(c.begin(), c.end(), comp);
+  }
+  bool empty(void) const { return _Base::empty(); }
+  size_t size(void) const { return _Base::size(); }
+  void push(const _Tp& value) { _Base::push(value); }
+  void pop(void) { _Base::pop(); }
+  const _Tp& top(void) const { return _Base::top(); }
+private:
+  // no copying!
+  _timer_queue(const _timer_queue&) {}
+  _timer_queue& operator=(const _timer_queue&) {}
+};
+
+struct TimerLessThan {
+  bool operator()(const BTimer* const l, const BTimer* const r) const {
+    return *r < *l;
+  }
+};
+
+#include <vector>
+typedef _timer_queue<BTimer*, std::vector<BTimer*>, TimerLessThan> TimerQueue;
+
+class TimerQueueManager {
+public:
+  virtual void addTimer(BTimer* timer) = 0;
+  virtual void removeTimer(BTimer* timer) = 0;
+};
+
+#endif // _BLACKBOX_Timer_hh