run_loop.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2015 The ClanLib Team
4 **
5 ** This software is provided 'as-is', without any express or implied
6 ** warranty. In no event will the authors be held liable for any damages
7 ** arising from the use of this software.
8 **
9 ** Permission is granted to anyone to use this software for any purpose,
10 ** including commercial applications, and to alter it and redistribute it
11 ** freely, subject to the following restrictions:
12 **
13 ** 1. The origin of this software must not be misrepresented; you must not
14 ** claim that you wrote the original software. If you use this software
15 ** in a product, an acknowledgment in the product documentation would be
16 ** appreciated but is not required.
17 ** 2. Altered source versions must be plainly marked as such, and must not be
18 ** misrepresented as being the original software.
19 ** 3. This notice may not be removed or altered from any source distribution.
20 **
21 ** Note: Some of the libraries ClanLib may link to may have additional
22 ** requirements or restrictions.
23 **
24 ** File Author(s):
25 **
26 ** Magnus Norddahl
27 */
28
29 #pragma once
30
31 #include <functional>
32 #include <future>
33
34 namespace clan
35 {
37 class RunLoop
38 {
39 public:
41 static void run();
42
44 static void exit();
45
48 static bool process(int timeout_ms = 0);
49
54 static void main_thread_async(std::function<void()> func);
55
61 template<typename T>
62 static std::future<T> main_thread_task(std::function<T()> func)
63 {
64 std::promise<T> promise;
65 main_thread_async([&]()
66 {
67 try
68 {
69 promise.set_value(func());
70 }
71 catch (...)
72 {
73 promise.set_exception(std::current_exception());
74 }
75 });
76 return promise.get_future();
77 }
78
79 static std::future<void> main_thread_task(std::function<void()> func)
80 {
81 std::promise<void> promise;
82 main_thread_async([&]()
83 {
84 try
85 {
86 func();
87 promise.set_value();
88 }
89 catch (...)
90 {
91 promise.set_exception(std::current_exception());
92 }
93 });
94 return promise.get_future();
95 }
96 };
97 }
clan
Definition: clanapp.h:35
clan::StyleTokenType::function
C style comment block.
clan::RunLoop::main_thread_task
static std::future< void > main_thread_task(std::function< void()> func)
Definition: run_loop.h:79
clan::RunLoop::run
static void run()
Continously process messages until RunLoop::exit() is called.
clan::RunLoop::process
static bool process(int timeout_ms=0)
Process messages for specified amount of time.
clan::RunLoop::main_thread_task
static std::future< T > main_thread_task(std::function< T()> func)
Executes a task on the main thread with a future result.
Definition: run_loop.h:62
clan::RunLoop
Main thread message pump processing.
Definition: run_loop.h:37
clan::RunLoop::exit
static void exit()
Signal that message processing should end immediately.
clan::RunLoop::main_thread_async
static void main_thread_async(std::function< void()> func)
Executes a function on the main thread during message processing.