1// SuperTux
2// Copyright (C) 2006 Matthias Braun <matze@braunis.de>
3//
4// This program is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// This program is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with this program. If not, see <http://www.gnu.org/licenses/>.
16
17#ifndef HEADER_SUPERTUX_SQUIRREL_SQUIRREL_SCHEDULER_HPP
18#define HEADER_SUPERTUX_SQUIRREL_SQUIRREL_SCHEDULER_HPP
19
20#include <vector>
21
22#include <squirrel.h>
23
24class SquirrelVM;
25
26/** This class keeps a list of squirrel threads that are scheduled for a certain
27 time. (the typical result of a wait() command in a squirrel script) */
28class SquirrelScheduler final
29{
30public:
31 SquirrelScheduler(SquirrelVM& vm);
32
33 /** time must be absolute time, not relative updates, i.e. g_game_time */
34 void update(float time);
35 void schedule_thread(HSQUIRRELVM vm, float time);
36
37private:
38 struct ScheduleEntry {
39 /// weak reference to the squirrel vm object
40 HSQOBJECT thread_ref;
41 /// time when the thread should be woken up
42 float wakeup_time;
43
44 bool operator<(const ScheduleEntry& other) const
45 {
46 // we need the smallest value on top
47 return wakeup_time > other.wakeup_time;
48 }
49 };
50
51private:
52 SquirrelVM& m_vm;
53
54 typedef std::vector<ScheduleEntry> ScheduleHeap;
55 ScheduleHeap schedule;
56
57private:
58 SquirrelScheduler(const SquirrelScheduler&) = delete;
59 SquirrelScheduler& operator=(const SquirrelScheduler&) = delete;
60};
61
62#endif
63
64/* EOF */
65