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https://github.com/Amanieu/asyncplusplus
Async++ concurrency framework for C++11
https://github.com/Amanieu/asyncplusplus
Last synced: 18 days ago
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Async++ concurrency framework for C++11
- Host: GitHub
- URL: https://github.com/Amanieu/asyncplusplus
- Owner: Amanieu
- License: mit
- Created: 2013-03-07T21:15:44.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2024-10-11T12:13:08.000Z (about 1 month ago)
- Last Synced: 2024-10-19T04:49:25.244Z (26 days ago)
- Language: C++
- Size: 314 KB
- Stars: 1,343
- Watchers: 92
- Forks: 198
- Open Issues: 12
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
Async++
=======
Async++ is a lightweight concurrency framework for C++11. The concept was inspired by the [Microsoft PPL library](http://msdn.microsoft.com/en-us/library/dd492418.aspx) and the [N3428](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3428.pdf) C++ standard proposal.
Example
-------
Here is a short example which shows some features of Async++:
```c++
#include
#include
int main()
{
auto task1 = async::spawn([] {
std::cout << "Task 1 executes asynchronously" << std::endl;
});
auto task2 = async::spawn([]() -> int {
std::cout << "Task 2 executes in parallel with task 1" << std::endl;
return 42;
});
auto task3 = task2.then([](int value) -> int {
std::cout << "Task 3 executes after task 2, which returned "
<< value << std::endl;
return value * 3;
});
auto task4 = async::when_all(task1, task3);
auto task5 = task4.then([](std::tuple,
async::task> results) {
std::cout << "Task 5 executes after tasks 1 and 3. Task 3 returned "
<< std::get<1>(results).get() << std::endl;
});
task5.get();
std::cout << "Task 5 has completed" << std::endl;
async::parallel_invoke([] {
std::cout << "This is executed in parallel..." << std::endl;
}, [] {
std::cout << "with this" << std::endl;
});
async::parallel_for(async::irange(0, 5), [](int x) {
std::cout << x;
});
std::cout << std::endl;
int r = async::parallel_reduce({1, 2, 3, 4}, 0, [](int x, int y) {
return x + y;
});
std::cout << "The sum of {1, 2, 3, 4} is " << r << std::endl;
}
// Output (order may vary in some places):
// Task 1 executes asynchronously
// Task 2 executes in parallel with task 1
// Task 3 executes after task 2, which returned 42
// Task 5 executes after tasks 1 and 3. Task 3 returned 126
// Task 5 has completed
// This is executed in parallel...
// with this
// 01234
// The sum of {1, 2, 3, 4} is 10
```
Supported Platforms
-------------------
The only requirement to use Async++ is a C++11 compiler and standard library. Unfortunately C++11 is not yet fully implemented on most platforms. Here is the list of OS and compiler combinations which are known to work.
- Linux: Works with GCC 4.7+, Clang 3.2+ and Intel compiler 15+.
- Mac: Works with Apple Clang (using libc++). GCC also works but you must get a recent version (4.7+).
- iOS: Works with Apple Clang (using libc++). Note: because iOS has no thread local support, the library uses a workaround based on pthreads.
- Windows: Works with GCC 4.8+ (with pthread-win32) and Visual Studio 2013+.
Building and Installing
-----------------------
Instructions for compiling Async++ and using it in your code are available on the [Building and Installing](https://github.com/Amanieu/asyncplusplus/wiki/Building-and-Installing) page.
Documentation
------------
The Async++ documentation is split into four parts:
- [Tasks](https://github.com/Amanieu/asyncplusplus/wiki/Tasks): This describes task objects which are the core Async++. Reading this first is strongly recommended.
- [Parallel algorithms](https://github.com/Amanieu/asyncplusplus/wiki/Parallel-algorithms): This describes functions to run work on ranges in parallel.
- [Schedulers](https://github.com/Amanieu/asyncplusplus/wiki/Schedulers): This describes the low-level details of Async++ and how to customize it.
- [API Reference](https://github.com/Amanieu/asyncplusplus/wiki/API-Reference): This gives detailed descriptions of all the classes and functions available in Async++.
Contact
-------
You can contact me by email at [email protected].