A little bit late but should be useful to the others. You can implement your own thread safe boolean in the following way: // default is false, set 1 for true. private int _threadSafeBoolBackValue = 0; public bool ThreadSafeBool { get { return (Interlocked.CompareExchange(ref _threadSafeBoolBackValue, 1, 1) == 1); } set { if (value) Interlocked.CompareExchange(ref … Read more
The C++11 standard library is broadly thread safe. The thread safety guarantees on PRNG objects are the same as on containers. More specifically, since the PRNG classes are all pseudo-random, i.e. they generate a deterministic sequence based on a definite current state, there is really no room to be peeking or poking at anything outside … Read more
I think you are indeed looking at a JVM bug in the OSR. Using the simplified program from @Gray (slight modifications to print an error message) and some options to mess with/print JIT compilation, you can see what is going on with the JIT. And, you can use some options to control that to a … Read more
You use a separate global connection pool for your application code. Put something like this in your redis.rb initializer: require ‘connection_pool’ REDIS = ConnectionPool.new(size: 10) { Redis.new } Now in your application code anywhere, you can do this: REDIS.with do |conn| # some redis operations end You’ll have up to 10 connections to share amongst … Read more
You better mark it volatile though: The volatile keyword indicates that a field might be modified by multiple concurrently executing threads. Fields that are declared volatile are not subject to compiler optimizations that assume access by a single thread. This ensures that the most up-to-date value is present in the field at all times. But … Read more
Dir::Tmpname.create You could use Dir::Tmpname.create. It figures out what temporary directory to use (unless you pass it a directory). It’s a little ugly to use given that it expects a block: require ‘tmpdir’ # => true Dir::Tmpname.create([‘prefix-‘, ‘.ext’]) {} # => “/tmp/prefix-20190827-1-87n9iu.ext” Dir::Tmpname.create([‘prefix-‘, ‘.ext’], ‘/my/custom/directory’) {} # => “/my/custom/directory/prefix-20190827-1-11x2u0h.ext” The block is there for code … Read more
Yes, the Jersey 2.1 client is thread safe and it should be thread safe even in the future Jersey version. You can create many WebTarget from one Client instance and invoke many requests on these WebTargets and even more requests on one WebTarget instance in the same time. The thread safety can be broken if … Read more
How you approach this is going to depend a lot on how frequently you’re writing. If you’re writing a relatively small amount of text fairly infrequently, then just use a static lock and be done with it. That might be your best bet in any case because the disk drive can only satisfy one request … Read more
There may well be other things meant in other contexts, but in cases I’ve worked with in the past, “free threaded” means it works, or at least can work, across different threads without any marshalling between apartments. Apartment-threading in contrast blocks off different “apartments” with separate copies of “global” data (which hence isn’t really global, … Read more
Given @Controller public class MyController { @RequestMapping(value = “/index”) public String respond() { return “index”; } } Spring will create an instance of MyController. This is because Spring parses your configuration, <mvc:annotation-driven>, sees @Controller (which is like @Component) and instantiates the annotated class. Because it sees @RequestMapping as well, it generates a HandlerMapping for it, … Read more