How can I prevent screen lock only when using Navigation? Waze has the option to do that, how can I do this in my App?

I have the following class. class Test{ public HashSet<string> Data = new HashSet<string>(); } I need to change the field "Data" from different threads, so I would like some opinion...

There is a multithreads application, that works with large DB file (>600 Mb). "Database is locked" problem started when I added blob data, and started operate with >30 Kb of BLOB data per request. ...

I would like to unlock screen and switching it on to show a popup on an event trigger. I am able to unlock the screen using newKeyguardLock = km.newKeyguardLock(HANDSFREE); newKeyguardLock.disable...

I kinda understand the purpose of entity locking and transaction isolation level, but can't get the difference between pessimistic locking and serializable level. As I understand, in both cases the...

Here is the context of my problem: a gitlab ci yml pipeline several jobs in the same internship all jobs use a task gradle requiring the use of his cache all jobs share the same gradle cache ...

I have a function in C# that can be called multiple times from multiple threads and I want it to be done only once so I thought about this: class MyClass { bool done = false; public void DoSomet...

I am trying to understand a paper on concurrent B-tree, in which the author mentioned latch vs lock, and how latches do not need a "Lock Manager". I have been trying to figure out what are differen...

I am having a problem with version control in Subversion. I checked out a working copy from respository and got locks on all of its files. Then, without releasing the locks I have deleted the folde...

Will flock or lockf work on a directory? I there another way to lock a directory in C on a linux machine?

I have an application that use a lot of socketio request and I make bulk request. When receiving the data, I have to iterate through a list to add and remove item: List carlist; void receiveDat...

When accessing critical section in C# with async/await keywords, using lock keyword or Monitor is generally not advised (Why can't I use the 'await' operator within the body of a lock s...

I need to open a log file for writing. Trouble is, many things may do this at the same time, and I don't want conflicts. Each write will be a single line, generally about 150 bytes (and always less...

I recently had the need to add an asynchronous variant of the lock keyword to one of my applications. There are many implementations to choose from, but the two that most appealed to me were: Asyn...

The await keyword in C# (.NET Async CTP) is not allowed from within a lock statement. From MSDN: An await expression cannot be used in a synchronous function, in a query expression, in the catch o...

I want to track mutual locks in postgres constantly. I came across Locks Monitoring article and tried to run the following query: SELECT bl.pid AS blocked_pid, a.usename AS blocked_user, kl.pid...

I've an android application that will be used in a restaurant, so I want that users can't exit from the app. The only thing that users can, is using application. (If possible only admin can exit fr...

Playing with Binding and Environment Adjustments in R , we have this 3 functions: lockEnvironment(env) locks env so you can't add a new symbol to env. lockBinding(sym, env) locks the sym within e...

When writing multi-threaded applications, one of the most common problems experienced are deadlocks. My questions to the community are: What is a deadlock? How do you detect them? Do you hand...

The documentation for Django 2.2, which I'm using, gives the following example usage for select_for_update: from django.db import transaction entries = Entry.objects.select_for_update().filter(aut...

Query: SELECT COUNT(online.account_id) cnt from online; But online table is also modified by an event, so frequently I can see lock by running show processlist. Is there any grammar in MySQL th...

From Head First design patterns book, the singleton pattern with double checked locking has been implemented as below: public class Singleton { private volatile static Singleton instance; priva...

I have a piece of code (simplified): if(reentrantLockObject.isLocked()) { reentrantLockObject.unlock(); } where reentrantLockObject is java.util.concurrent.locks.ReentrantLock. Sometimes I get...

I have got the following code: public void Update(Foo foo) { lock(_locker) { UpdateFirstPart(foo.First); UpdateSecondPart(foo.Second); UpdateThirdPart(foo.Third); } } public class Foo {...

I am using EF Core 6 vs a SQL Server DB. Sometimes, the execution of a SELECT query takes more than 30 seconds, and goes in timeout. If I execute the very same SQL generated by EF Core (with the ve...