1 #ifndef _SG_EVENT_MGR_HXX
2 #define _SG_EVENT_MGR_HXX
4 #include <simgear/props/props.hxx>
5 #include <simgear/structure/subsystem_mgr.hxx>
7 #include "callback.hxx"
22 SGTimerQueue(int preSize=1);
25 void update(double deltaSecs);
27 double now() { return _now; }
29 void insert(SGTimer* timer, double time);
30 SGTimer* remove(SGTimer* timer);
33 SGTimer* nextTimer() { return _numEntries ? _table[0].timer : 0; }
34 double nextTime() { return -_table[0].pri; }
37 // The "priority" is stored as a negative time. This allows the
38 // implemenetation to treat the "top" of the heap as the largest
39 // value and avoids developer mindbugs. ;)
40 struct HeapEntry { double pri; SGTimer* timer; };
42 int parent(int n) { return ((n+1)/2) - 1; }
43 int lchild(int n) { return ((n+1)*2) - 1; }
44 int rchild(int n) { return ((n+1)*2 + 1) - 1; }
45 double pri(int n) { return _table[n].pri; }
46 void swap(int a, int b) {
47 HeapEntry tmp = _table[a];
48 _table[a] = _table[b];
62 class SGEventMgr : public SGSubsystem
65 SGEventMgr() { _freezeProp = 0; }
67 virtual void init() {}
68 virtual void update(double delta_time_sec);
70 void setFreezeProperty(SGPropertyNode* node) { _freezeProp = node; }
73 * Add a single function callback event as a repeating task.
74 * ex: addTask("foo", &Function ... )
76 template<typename FUNC>
77 inline void addTask(const char* name, const FUNC& f,
78 double interval, double delay=0, bool sim=false)
79 { add(make_callback(f), interval, delay, true, sim); }
82 * Add a single function callback event as a one-shot event.
83 * ex: addEvent("foo", &Function ... )
85 template<typename FUNC>
86 inline void addEvent(const char* name, const FUNC& f,
87 double delay, bool sim=false)
88 { add(make_callback(f), 0, delay, false, sim); }
91 * Add a object/method pair as a repeating task.
92 * ex: addTask("foo", &object, &ClassName::Method, ...)
94 template<class OBJ, typename METHOD>
95 inline void addTask(const char* name,
96 const OBJ& o, METHOD m,
97 double interval, double delay=0, bool sim=false)
98 { add(make_callback(o,m), interval, delay, true, sim); }
101 * Add a object/method pair as a repeating task.
102 * ex: addEvent("foo", &object, &ClassName::Method, ...)
104 template<class OBJ, typename METHOD>
105 inline void addEvent(const char* name,
106 const OBJ& o, METHOD m,
107 double delay, bool sim=false)
108 { add(make_callback(o,m), 0, delay, false, sim); }
111 friend struct SGTimer;
113 void add(SGCallback* cb,
114 double interval, double delay,
115 bool repeat, bool simtime);
117 SGPropertyNode* _freezeProp;
118 SGTimerQueue _rtQueue;
119 SGTimerQueue _simQueue;
122 #endif // _SG_EVENT_MGR_HXX