1 //
2 // Copyright (c) 2008-2017 the Urho3D project.
3 //
4 // Permission is hereby granted, free of charge, to any person obtaining a copy
5 // of this software and associated documentation files (the "Software"), to deal
6 // in the Software without restriction, including without limitation the rights
7 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 // copies of the Software, and to permit persons to whom the Software is
9 // furnished to do so, subject to the following conditions:
10 //
11 // The above copyright notice and this permission notice shall be included in
12 // all copies or substantial portions of the Software.
13 //
14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 // THE SOFTWARE.
21 //
22 
23 #pragma once
24 
25 #ifdef URHO3D_IS_BUILDING
26 #include "Urho3D.h"
27 #else
28 #include <Urho3D/Urho3D.h>
29 #endif
30 
31 #ifndef _WIN32
32 #include <pthread.h>
33 typedef pthread_t ThreadID;
34 #else
35 typedef unsigned ThreadID;
36 #endif
37 
38 namespace Urho3D
39 {
40 
41 /// Operating system thread.
42 class URHO3D_API Thread
43 {
44 public:
45     /// Construct. Does not start the thread yet.
46     Thread();
47     /// Destruct. If running, stop and wait for thread to finish.
48     virtual ~Thread();
49 
50     /// The function to run in the thread.
51     virtual void ThreadFunction() = 0;
52 
53     /// Start running the thread. Return true if successful, or false if already running or if can not create the thread.
54     bool Run();
55     /// Set the running flag to false and wait for the thread to finish.
56     void Stop();
57     /// Set thread priority. The thread must have been started first.
58     void SetPriority(int priority);
59 
60     /// Return whether thread exists.
IsStarted()61     bool IsStarted() const { return handle_ != 0; }
62 
63     /// Set the current thread as the main thread.
64     static void SetMainThread();
65     /// Return the current thread's ID.
66     static ThreadID GetCurrentThreadID();
67     /// Return whether is executing in the main thread.
68     static bool IsMainThread();
69 
70 protected:
71     /// Thread handle.
72     void* handle_;
73     /// Running flag.
74     volatile bool shouldRun_;
75 
76     /// Main thread's thread ID.
77     static ThreadID mainThreadID;
78 };
79 
80 }
81