1 // The MIT License (MIT)
2 //
3 // 	Copyright (c) 2015 Sergey Makeev, Vadim Slyusarev
4 //
5 // 	Permission is hereby granted, free of charge, to any person obtaining a copy
6 // 	of this software and associated documentation files (the "Software"), to deal
7 // 	in the Software without restriction, including without limitation the rights
8 // 	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // 	copies of the Software, and to permit persons to whom the Software is
10 // 	furnished to do so, subject to the following conditions:
11 //
12 //  The above copyright notice and this permission notice shall be included in
13 // 	all copies or substantial portions of the Software.
14 //
15 // 	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // 	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // 	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // 	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // 	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // 	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 // 	THE SOFTWARE.
22 
23 #pragma once
24 
25 #include <MTTools.h>
26 #include <MTPlatform.h>
27 #include <MTConcurrentQueueLIFO.h>
28 #include <MTStackArray.h>
29 #include <MTArrayView.h>
30 
31 
32 namespace MT
33 {
34 	class FiberContext;
35 
36 	namespace internal
37 	{
38 		struct ThreadContext;
39 	}
40 
41 	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
42 	// Task group
43 	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
44 	// Application can assign task group to task and later wait until group was finished.
45 	class TaskGroup
46 	{
47 		friend class FiberContext;
48 		friend class TaskScheduler;
49 		friend struct internal::ThreadContext;
50 
51 	protected:
52 
53 		AtomicInt inProgressTaskCount;
54 		Event allDoneEvent;
55 
56 		//Tasks awaiting group through FiberContext::WaitGroupAndYield call
57 		ConcurrentQueueLIFO<FiberContext*> waitTasksQueue;
58 
59 	public:
60 
61 		TaskGroup()
62 		{
63 			inProgressTaskCount.Set(0);
64 			allDoneEvent.Create( EventReset::MANUAL, true );
65 		}
66 
67 		int GetTaskCount() const
68 		{
69 			return inProgressTaskCount.Get();
70 		}
71 	};
72 
73 
74 
75 }
76