1 | // Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors |
2 | // Licensed under the MIT License: |
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 | #pragma once |
23 | |
24 | #if defined(__GNUC__) && !KJ_HEADER_WARNINGS |
25 | #pragma GCC system_header |
26 | #endif |
27 | |
28 | #include "common.h" |
29 | #include "function.h" |
30 | #include "exception.h" |
31 | |
32 | namespace kj { |
33 | |
34 | class Thread { |
35 | // A thread! Pass a lambda to the constructor, and it runs in the thread. The destructor joins |
36 | // the thread. If the function throws an exception, it is rethrown from the thread's destructor |
37 | // (if not unwinding from another exception). |
38 | |
39 | public: |
40 | explicit Thread(Function<void()> func); |
41 | KJ_DISALLOW_COPY(Thread); |
42 | |
43 | ~Thread() noexcept(false); |
44 | |
45 | #if !_WIN32 |
46 | void sendSignal(int signo); |
47 | // Send a Unix signal to the given thread, using pthread_kill or an equivalent. |
48 | #endif |
49 | |
50 | void detach(); |
51 | // Don't join the thread in ~Thread(). |
52 | |
53 | private: |
54 | struct ThreadState { |
55 | ThreadState(Function<void()> func); |
56 | |
57 | Function<void()> func; |
58 | Function<void(Function<void()>)> initializer; |
59 | kj::Maybe<kj::Exception> exception; |
60 | |
61 | unsigned int refcount; |
62 | // Owned by the parent thread and the child thread. |
63 | |
64 | void unref(); |
65 | }; |
66 | ThreadState* state; |
67 | |
68 | #if _WIN32 |
69 | void* threadHandle; |
70 | #else |
71 | unsigned long long threadId; // actually pthread_t |
72 | #endif |
73 | bool detached = false; |
74 | |
75 | #if _WIN32 |
76 | static unsigned long __stdcall runThread(void* ptr); |
77 | #else |
78 | static void* runThread(void* ptr); |
79 | #endif |
80 | }; |
81 | |
82 | } // namespace kj |
83 | |