127 lines
3.4 KiB
C++
127 lines
3.4 KiB
C++
#ifndef _SG_EVENT_MGR_HXX
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#define _SG_EVENT_MGR_HXX
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#include <simgear/props/props.hxx>
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#include <simgear/structure/subsystem_mgr.hxx>
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#include "callback.hxx"
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class SGEventMgr;
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struct SGTimer {
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double interval;
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SGCallback* callback;
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SGEventMgr* mgr;
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bool repeat;
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bool simtime;
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void run();
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};
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class SGTimerQueue {
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public:
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SGTimerQueue(int preSize=1);
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~SGTimerQueue();
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void update(double deltaSecs);
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double now() { return _now; }
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void insert(SGTimer* timer, double time);
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SGTimer* remove(SGTimer* timer);
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SGTimer* remove();
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SGTimer* nextTimer() { return _numEntries ? _table[0].timer : 0; }
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double nextTime() { return -_table[0].pri; }
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private:
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// The "priority" is stored as a negative time. This allows the
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// implemenetation to treat the "top" of the heap as the largest
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// value and avoids developer mindbugs. ;)
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struct HeapEntry { double pri; SGTimer* timer; };
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int parent(int n) { return ((n+1)/2) - 1; }
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int lchild(int n) { return ((n+1)*2) - 1; }
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int rchild(int n) { return ((n+1)*2 + 1) - 1; }
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double pri(int n) { return _table[n].pri; }
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void swap(int a, int b) {
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HeapEntry tmp = _table[a];
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_table[a] = _table[b];
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_table[b] = tmp;
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}
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void siftDown(int n);
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void siftUp(int n);
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void growArray();
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// gcc complains there is no function specification anywhere.
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// void check();
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double _now;
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HeapEntry *_table;
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int _numEntries;
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int _tableSize;
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};
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class SGEventMgr : public SGSubsystem
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{
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public:
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SGEventMgr() { _rtProp = 0; }
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~SGEventMgr() { _rtProp = 0; }
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virtual void init() {}
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virtual void update(double delta_time_sec);
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void setRealtimeProperty(SGPropertyNode* node) { _rtProp = node; }
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/**
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* Add a single function callback event as a repeating task.
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* ex: addTask("foo", &Function ... )
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*/
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template<typename FUNC>
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inline void addTask(const char* name, const FUNC& f,
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double interval, double delay=0, bool sim=false)
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{ add(make_callback(f), interval, delay, true, sim); }
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/**
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* Add a single function callback event as a one-shot event.
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* ex: addEvent("foo", &Function ... )
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*/
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template<typename FUNC>
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inline void addEvent(const char* name, const FUNC& f,
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double delay, bool sim=false)
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{ add(make_callback(f), 0, delay, false, sim); }
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/**
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* Add a object/method pair as a repeating task.
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* ex: addTask("foo", &object, &ClassName::Method, ...)
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*/
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template<class OBJ, typename METHOD>
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inline void addTask(const char* name,
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const OBJ& o, METHOD m,
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double interval, double delay=0, bool sim=false)
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{ add(make_callback(o,m), interval, delay, true, sim); }
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/**
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* Add a object/method pair as a repeating task.
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* ex: addEvent("foo", &object, &ClassName::Method, ...)
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*/
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template<class OBJ, typename METHOD>
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inline void addEvent(const char* name,
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const OBJ& o, METHOD m,
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double delay, bool sim=false)
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{ add(make_callback(o,m), 0, delay, false, sim); }
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private:
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friend struct SGTimer;
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void add(SGCallback* cb,
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double interval, double delay,
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bool repeat, bool simtime);
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SGPropertyNode_ptr _freezeProp;
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SGPropertyNode_ptr _rtProp;
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SGTimerQueue _rtQueue;
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SGTimerQueue _simQueue;
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};
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#endif // _SG_EVENT_MGR_HXX
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