Contrib async

[abdelaziz-mahdy]

fix #124

• C wrappers
• dart bindings
• tests

[abdelaziz-mahdy]

i dont think this is my best work, but i got lost since it different than the ones before it , so let me know if there is something that is a problem and needs to be fixed

hopefully it should be all good

[rainyl]

i dont think this is my best work, but i got lost since it different than the ones before it , so let me know if there is something that is a problem and needs to be fixed

hopefully it should be all good

Great, I will review it.

[rainyl]

I think get/set properties are actually unnecessary to be asynchronous, in my test, it will be a little slower than synchronous calls, and getter/setter usually pass primitive types like int and double, it's fast enough to not block the main thread.

So, I am going to delete all async getter/setter, what do you think?

[rainyl]

Ready for merging

[abdelaziz-mahdy]

I think get/set properties are actually unnecessary to be asynchronous, in my test, it will be a little slower than synchronous calls, and getter/setter usually pass primitive types like int and double, it's fast enough to not block the main thread.

So, I am going to delete all async getter/setter, what do you think?

I do agree that the overhead of running an isolate is not worth it.