synchronization

I'm trying to sync music sent from a host iPhone to a client iPhone.. the audio is read using AVAssetReader and sent via packets to the client, which in turns feeds it to a ring buffer, which in turn populates the audioqueue buffers and starts playing. I was going over the AudioQueue docs and there seems to be two different concepts of a timestamp related to the audioQueue: Audio Queue Time and Audio Queue Device Time . I'm not sure how those two are related and when one should be used rather (or in conjunction with) the other. 来源： https://stackoverflow.com/questions/12668803/difference

I need to update my additional filed user_id in pivot table... I tried like this: $commet = Comment::find(2); $commet->likes()->sync([2,'user_id'=>1]); But my filed is updated with 0 . Any solution for this? I think your sync array isn't right. Try: $commet->likes()->sync(array( 1 => array('user_id' => 1), 2 => array('user_id' => 5), ... )); Ie. sync(array( related_id => array('pivot_field' => value), ... )); 来源： https://stackoverflow.com/questions/33052390/how-to-sync-additional-fields-in-pivot-table-laravel-5

This is related to my previous post Problem with downloading multiple files using AsyncTask I'm trying to download two video files and also show a ProgressDialog during the process. For this I'm using AsyncTask. I want the 1st download to complete, free up memory then start the 2nd download. I wrote the following code to achieve this, but it seems the 2nd download never begins. startDownload() { DownloadFileAsync d1 = new DownloadFileAsync(); d1.execute(videoPath+fileNames[0],fileNames[0]); if(d1.getStatus()==AsyncTask.Status.FINISHED) { d1 = null; DownloadFileAsync d2 = new DownloadFileAsync(

I have two directories on two different computers - machine A (Windows) and machine B (OSX) - and I want to keep the two directories via Mercurial in sync. [*] The restriction is that the two machines are not connected via LAN/WAN; the only way to move data between them is via email . So I thought emailing Mercurial bundles as deltas could do the trick. My current workflow is roughly this (using a local tag lcb for the latest change bundle): Say I work on machine A . At the end of the day I do: hg commit -A -m "changes 123" hg bundle --base lcb bundle_123.hg hg tag --local -f lcb --rev tip

I have a class proposing translations utilities. The translations themselves should be reloaded every 30 minutes. I use Spring Timer support for that. Basically, my class looks like : public interface Translator { public void loadTranslations(); public String getTranslation(String key); } loadTranslations() can be pretty long to run, so while it is running the old translations are still available. This is done by loading the translations in a local Map and just changing the reference when all translations are loaded. My problem is : how do I make sure that when a thread is already loading

I'm synchronizing reader and writer processes on Linux. I have 0 or more process (the readers) that need to sleep until they are woken up, read a resource, go back to sleep and so on. Please note I don't know how many reader processes are up at any moment. I have one process (the writer) that writes on a resource, wakes up the readers and does its business until another resource is ready (in detail, I developed a no starve reader-writers solution, but that's not important). To implement the sleep / wake up mechanism I use a Posix condition value, pthread_cond_t. The clients call a pthread_cond