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package net.lacolaco.smileessence.util
import android.util.Log
import kotlinx.coroutines.experimental.*
import kotlinx.coroutines.experimental.android.UI
import net.lacolaco.smileessence.World
import java.lang.ref.WeakReference
private val exceptionHandler = CoroutineExceptionHandler { c, throwable ->
val tag = "CoroutineContext:$c"
Log.e(tag, "Uncaught exception ${throwable::class}; re-throwing...")
throw throwable
}
val uiContext = UI + exceptionHandler
val bgContext = CommonPool + exceptionHandler
fun launchUi(block: suspend CoroutineScope.() -> Unit) {
launch(uiContext, CoroutineStart.DEFAULT, null, null, block)
}
fun <T> bg(block: suspend CoroutineScope.() -> T) =
async(bgContext, CoroutineStart.DEFAULT, null, null, block)
fun launchBg(block: suspend CoroutineScope.() -> Unit) =
launch(bgContext, CoroutineStart.DEFAULT, null, null, block)
fun World.getMainActivityOrCancel() =
getMainActivity() ?: throw CancellationException("MainActivity is gone")
class CancellableReference<out T> internal constructor(obj: T) {
private val ref = WeakReference(obj)
fun get() = ref.get() ?: throw CancellationException("Object is gone")
}
fun <T> ref(obj: T) = CancellableReference(obj)
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