eventqueue.h

00001 /*
00002  * (c) Copyright 2012 EVRYTHNG Ltd London / Zurich
00003  * www.evrythng.com
00004  *
00005  * --- DISCLAIMER ---
00006  *
00007  * EVRYTHNG provides this source code "as is" and without warranty of any kind,
00008  * and hereby disclaims all express or implied warranties, including without
00009  * limitation warranties of merchantability, fitness for a particular purpose,
00010  * performance, accuracy, reliability, and non-infringement.
00011  *
00012  * Author: Michel Yerly
00013  *
00014  */
00015 #include <queue>
00016 #include <stdint.h>
00017 
00018 enum EventType {
00019     EVT_SET_PROP,
00020     EVT_GET_PROP
00021 };
00022 
00023 struct Event {
00024     int64_t time;
00025     EventType type;
00026 };
00027 
00028 class EventComparison
00029 {
00030 public:
00031     bool operator() (const Event& lhs, const Event&rhs) const {
00032         return (lhs.time>rhs.time);
00033     }
00034 };
00035 
00036 class EventQueue
00037 {
00038 public:
00039     void put(int64_t time, EventType type);
00040     EventType waitNext(int64_t currentTime);
00041     bool empty();
00042     int size();
00043 private:
00044     std::priority_queue<Event, std::vector<Event>, EventComparison> queue;
00045 };