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72b9787e JB |
1 | /***************************************************************************** |
2 | * x265: threading class and intrinsics | |
3 | ***************************************************************************** | |
4 | * Copyright (C) 2013 x265 project | |
5 | * | |
6 | * Authors: Steve Borho <steve@borho.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. | |
21 | * | |
22 | * This program is also available under a commercial proprietary license. | |
23 | * For more information, contact us at license @ x265.com | |
24 | *****************************************************************************/ | |
25 | ||
26 | #include "threading.h" | |
27 | ||
28 | namespace x265 { | |
29 | // x265 private namespace | |
30 | ||
31 | /* C shim for forced stack alignment */ | |
32 | static void stackAlignMain(Thread *instance) | |
33 | { | |
34 | instance->threadMain(); | |
35 | } | |
36 | ||
37 | #if _WIN32 | |
38 | ||
39 | static DWORD WINAPI ThreadShim(Thread *instance) | |
40 | { | |
41 | // defer processing to the virtual function implemented in the derived class | |
42 | x265_stack_align(stackAlignMain, instance); | |
43 | ||
44 | return 0; | |
45 | } | |
46 | ||
47 | bool Thread::start() | |
48 | { | |
49 | DWORD threadId; | |
50 | ||
51 | this->thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ThreadShim, this, 0, &threadId); | |
52 | ||
53 | return threadId > 0; | |
54 | } | |
55 | ||
56 | void Thread::stop() | |
57 | { | |
58 | if (this->thread) | |
59 | WaitForSingleObject(this->thread, INFINITE); | |
60 | } | |
61 | ||
62 | Thread::~Thread() | |
63 | { | |
64 | if (this->thread) | |
65 | CloseHandle(this->thread); | |
66 | } | |
67 | ||
68 | #else /* POSIX / pthreads */ | |
69 | ||
70 | static void *ThreadShim(void *opaque) | |
71 | { | |
72 | // defer processing to the virtual function implemented in the derived class | |
73 | Thread *instance = reinterpret_cast<Thread *>(opaque); | |
74 | ||
75 | x265_stack_align(stackAlignMain, instance); | |
76 | ||
77 | return NULL; | |
78 | } | |
79 | ||
80 | bool Thread::start() | |
81 | { | |
82 | if (pthread_create(&this->thread, NULL, ThreadShim, this)) | |
83 | { | |
84 | this->thread = 0; | |
85 | ||
86 | return false; | |
87 | } | |
88 | ||
89 | return true; | |
90 | } | |
91 | ||
92 | void Thread::stop() | |
93 | { | |
94 | if (this->thread) | |
95 | pthread_join(this->thread, NULL); | |
96 | } | |
97 | ||
98 | Thread::~Thread() {} | |
99 | ||
100 | #endif // if _WIN32 | |
101 | ||
102 | Thread::Thread() | |
103 | { | |
104 | this->thread = 0; | |
105 | } | |
106 | } |