synchronization Questions
6
Solved
I was wondering whenever exists a solution to perform synchronization in JavaScript code. For example I have the following case: I'm trying to cache some response values from AJAX call, the problem...
Kantianism asked 9/5, 2009 at 10:4
9
Solved
I have a custom thread pool class, that creates some threads that each wait on their own event (signal). When a new job is added to the thread pool, it wakes the first free thread so that it execut...
Envenom asked 20/8, 2009 at 13:15
3
Solved
I'm trying to find an easy way of deploying only changed files to the webserver for deployment purpose. In times past I've used MSBuild, which could be told to only copy files that were newer than ...
Footlight asked 25/4, 2014 at 21:40
3
I'm trying to figure out how if rsyncing files is atomic. I couldn't find any confirmation about it. Due to rsync being able to send only deltas, I was under the impression that it also updates onl...
Dower asked 22/9, 2010 at 12:40
2
I need to be able to check if the local OneDrive folder is in sync/up to date.
Can I check this by looking at any of the file/folder properties(in C# code) Without using any of One Drive APIs?
Latvian asked 20/12, 2016 at 11:25
6
Solved
Is there any difference in performance between this
synchronized void x() {
y();
}
synchronized void y() {
}
and this
synchronized void x() {
y();
}
void y() {
}
Venessavenetia asked 25/9, 2013 at 5:18
3
Solved
What (I think) I want is the equivelant of an AutoResetEvent that multiple threads can wait on, all to be resumed when it's set.
I know this can be achieved by having one AutoResetEvent per thread...
Catboat asked 24/3, 2011 at 7:58
5
Solved
Does @synchronized not use "lock" and "unlock" to achieve mutual exclusion? How does it do lock/unlock then?
The output of the following program is only "Hello World".
@interface MyLock: NSLock&l...
Conceptualize asked 31/7, 2009 at 23:16
1
Solved
I am creating an Android native app and I am using Firebase Auth with multiple auth provides such as; Email, Facebook, Google etc, I will use the Firebase SDK for chat and real-time DB.
I have a R...
Spatz asked 29/7, 2017 at 4:36
3
Solved
I am trying to understand how multithreading works in Java. I understand the difference between Volatile and Synchronization.
Volatile is about visibility and doesn't guarantee synchronizat...
Metronome asked 27/7, 2017 at 13:10
2
Solved
Imagine I have 3 threads with a wait condition, and a 4th thread with a notify condition.
Now, all 3 wait threads run and enter a waiting state. Once this is done, the 4th thread runs and ca...
Sole asked 26/7, 2017 at 8:43
1
I write some vertex data inside a shader to SSBO. Then I want to use the data written to the SSBO as VBOs. These will be used for the next draw call. How can this be done?
Here is, how I do it now...
Magee asked 18/7, 2017 at 18:26
7
Solved
I am aggregating multiple values for keys in a multi-threaded environment. The keys are not known in advance. I thought I would do something like this:
class Aggregator {
protected ConcurrentHash...
Stickup asked 24/5, 2012 at 18:54
0
I have a Finder Sync Extension that will display a badge on a file based on the state of a local database. It's straightforward enough to query this database in the requestBadgeIdentifierForURL fun...
Safire asked 7/7, 2017 at 1:8
2
Solved
I want to store data in a large array with _mm256_stream_si256() called in a loop.
As I understood, a memory fence is then needed to make these changes visible to other threads. The description of ...
Monzon asked 1/7, 2017 at 18:14
1
Solved
I'm using Realm Swift and the Realm Object Server as the storage solution for an app I am working on. I could use a traditional server with a relational database, but I really don't need the server...
Phenolphthalein asked 22/6, 2017 at 17:8
2
I hope you will be able to help me in my trouble. My program is doing something I don't really understand.
The program purpose is given as below:
Create two threads (task_timer and task_read).
Thes...
Temperance asked 12/6, 2017 at 14:33
8
Solved
Suppose our application have only one thread. and we are using StringBuffer then what is the problem?
I mean if StringBuffer can handle multiple threads through synchronization, what is the proble...
Rubstone asked 30/5, 2011 at 9:2
1
I am trying to run to promises (which make some rest API calls on each). Based on the result of the two promises, use the third function to process the data. Also, the functions running in se...
Feathered asked 7/6, 2017 at 21:12
2
I need to store the result of FireBase getValue method that is async by his own. I can't use something like "onPostExecute()" and, for my purpose, i can't execute all my operation "into onDataChang...
Valorie asked 15/11, 2015 at 18:11
2
Solved
I have an Android app, that keeps track of some items and their quantities.
What I need is a way for the user to modify data on multiple devices while being offline, with proper synchronization or...
Thibault asked 4/12, 2016 at 16:21
2
Solved
The package summary of java.util.stream states the following:
An example of a stateful lambda is the parameter to map() in:
Set<Integer> seen = Collections.synchronizedSet(new HashSet<...
Chalco asked 25/5, 2017 at 3:26
11
I happened upon an article recently discussing the double checked locking pattern in Java and its pitfalls and now I'm wondering if a variant of that pattern that I've been using for years now is s...
Hardman asked 26/10, 2009 at 14:24
2
Solved
I've been using MPI_Scatter / MPI_Gather for a variety of parallel computations. One thing I've noticed is that MPI_Barrier() is often called to synchronize processors, akin to the OpenMP bar...
Halfandhalf asked 15/5, 2017 at 19:23
1
Solved
Sync way
For example, ruby:
con = Mysql.new('localhost')
rs1 = con.query('select * from test01') # A
rs2 = con.query('select * from test02') # B
rs = getResult(rs1, rs2) # C
con.close
so A ...
Pennebaker asked 15/5, 2017 at 7:39
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