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 <MTGroupedTask.h>
29 
30 namespace MT
31 {
32 	class FiberContext;
33 	class TaskScheduler;
34 
35 	namespace internal
36 	{
37 
38 		namespace ThreadState
39 		{
40 			const uint32 ALIVE = 0;
41 			const uint32 EXIT = 1;
42 		};
43 
44 		////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
45 		// Thread (Scheduler fiber) context
46 		////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
47 		struct ThreadContext
48 		{
49 			FiberContext* lastActiveFiberContext;
50 
51 			// pointer to task manager
52 			TaskScheduler* taskScheduler;
53 
54 			// thread
55 			Thread thread;
56 
57 			// scheduler fiber
58 			Fiber schedulerFiber;
59 
60 			// task queue awaiting execution
61 			ConcurrentQueueLIFO<internal::GroupedTask> queue;
62 
63 			// new task was arrived to queue event
64 			Event hasNewTasksEvent;
65 
66 			// whether thread is alive
67 			AtomicInt state;
68 
69 			// Temporary buffer
70 			std::vector<internal::GroupedTask> descBuffer;
71 
72 			// prevent false sharing between threads
73 			uint8 cacheline[64];
74 
75 			ThreadContext();
76 			~ThreadContext();
77 
78 			void RestoreAwaitingTasks(TaskGroup::Type taskGroup);
79 		};
80 
81 	}
82 
83 }
84