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# EventBus
[![Join the chat at https://gitter.im/EventBusCpp/Lobby](https://badges.gitter.im/EventBusCpp/Lobby.svg)](https://gitter.im/EventBusCpp/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Build Status](https://travis-ci.org/gelldur/EventBus.svg?branch=master)](https://travis-ci.org/gelldur/EventBus)
@ -22,19 +21,17 @@ EventBus main goals:
- Free
- tiny (~15 KB)
- Decouples notification senders and receivers
- on every platform you need (crossplatform)
- on every platform you need (cross-platform)
# Brief @ presentation
Presentation [google docs](https://docs.google.com/presentation/d/1apAlKcVWo9FcqkPqL8108a1Fy9LGmhgLT56hSVpoI3w/edit?usp=sharing)
# Sample
You can checkout [sample/](sample/)
You can checkout [sample/](sample/)
If you want to play with sample online checkout this link: [wandbox.org](https://wandbox.org/permlink/p3xeQaosuxv6w1rv)
# Usage
0. Store bus
```cpp
@ -51,7 +48,7 @@ namespace Event // optional namespace
{
int goldReceived = 0;
};
struct OK {}; // Simple event when user press "OK" button
}
```
@ -65,7 +62,7 @@ bus.listen<Event::Gold>
{
std::cout << "I received gold: " << event.goldReceived << "!" << std::endl;
});
HudLayer* hudLayer;
// Hud layer will receive info about gold
bus.listen<Event::Gold>(std::bind(&HudLayer::onGoldReceived,hudLayer,std::placeholders::_1));
@ -111,7 +108,7 @@ bus.listen<SimpleEvent>(token, [](const auto& event) // another listener
});
bus.unlistenAll(token);//Now those two lambdas will be removed from listeners
```
```
If you don't want to handle manually with `token` you can use `EventCollector` class.
It is useful when we want to have multiple listeners in one class. So above example could look like this:
@ -164,9 +161,8 @@ bus.notify<int>("event1", 2);
```
# Add to your project
EventBus can be added as `ADD_SUBDIRECTORY` to your cmake file.
Then simply link it via `TARGET_LINK_LIBRARIES`
Then simply link it via `TARGET_LINK_LIBRARIES`
Example:
```
ADD_SUBDIRECTORY(lib/EventBus)
@ -177,7 +173,7 @@ ADD_EXECUTABLE(MyExecutable
TARGET_LINK_LIBRARIES(MyExecutable PUBLIC Dexode::EventBus)
```
Also if you want you can install library and add it at any way you want.
Also if you want you can install library and add it at any way you want.
Eg.
```commandline
mkdir -p lib/build/
@ -189,10 +185,10 @@ cmake --build . --target install
make && make install
```
Now in `Release/install` library is placed.
Now in `Release/install` library is placed.
# Performance
I have prepared some performance results. You can read about them [here](performance/README.md)
# Performance (could be outdated)
I have prepared some performance results. You can read about them [here](performance/README.md)
Small example:
```
@ -203,33 +199,21 @@ checkNotifyFor10kListenersWhenNoOneListens 18 ns
checkNotifyFor10kListenersWhenNoOneListens_CCNotificationCenter 127388 ns 127378 ns 5460 sum=0
```
# Future plans
- Write more and better tests
- Thread safe EventBus ?
- Verbose messages for easy debugging ?
- Generating graph flow ?
- Add nice documentation [like in POCO](https://pocoproject.org/slides/090-NotificationsEvents.pdf)
- ...
# Issues ?
Please report here issue / question / whatever in 99% I will answer ;)
Please report here issue / question / whatever, there is chance 99% I will answer ;)
# Thanks to
- [staakk](https://github.com/stanislawkabacinski) for fixing windows ;) [53d5026](https://github.com/gelldur/EventBus/commit/53d5026cad24810e82cd8d4a43d58cbfe329c502)
- [kuhar](https://github.com/kuhar) for his advice and suggestions for EventBus
- [swietlana](https://github.com/swietlana) for english correction and support ;)
- [swietlana](https://github.com/swietlana) for English correction and support ;)
- [ruslo](https://github.com/ruslo) for this great example: https://github.com/forexample/package-example
## For modern cmake refer
- https://github.com/forexample/package-example
- https://www.youtube.com/watch?v=6sWec7b0JIc
# License
EventBus source code can be used according to the **Apache License, Version 2.0**.
EventBus source code can be used according to the **Apache License, Version 2.0**.
For more information see [LICENSE](LICENSE) file
If you don't like to read to much here is sumup about license [Apache 2.0](https://tldrlegal.com/license/apache-license-2.0-(apache-2.0)#summary)