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package com.bumptech.glide.load.engine;
import android.os.Handler;
import android.os.Message;
import com.bumptech.glide.util.Util;
/**
* A class that can safely recycle recursive resources.
*/
class ResourceRecycler {
private boolean isRecycling;
private final Handler handler = new Handler(new ResourceRecyclerCallback());
public void recycle(Resource<?> resource) {
Util.assertMainThread();
if (isRecycling) {
// If a resource has sub-resources, releasing a sub resource can cause it's parent to be synchronously
// evicted which leads to a recycle loop when the parent releases it's children. Posting breaks this loop.
handler.obtainMessage(ResourceRecyclerCallback.RECYCLE_RESOURCE, resource).sendToTarget();
} else {
isRecycling = true;
resource.recycle();
isRecycling = false;
}
}
private static class ResourceRecyclerCallback implements Handler.Callback {
public static final int RECYCLE_RESOURCE = 1;
@Override
public boolean handleMessage(Message message) {
if (message.what == RECYCLE_RESOURCE) {
Resource resource = (Resource) message.obj;
resource.recycle();
return true;
}
return false;
}
}
}
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