thread-local

.NET 4.0 introduced ThreadLocal<T> class, which is great. Now, my app use case requires something like Java's InheritableThreadLocal class. Is there anything like that in .NET? If not, how can a new thread initializes its thread locals variables with those from the parent thread? I suppose I need to make use the initialization factory method but not sure what to put in there. The closest thing I can think of is using ILogicalThreadAffinitive and storing your object in the thread's CallContext with CallContext.SetData. Object implementing ILogicalThreadAffinitive will flow across logical

(This is with Java 8 and Tomcat 8 on SLES, FWIW.) How worried do I need to be about performance problems with SecureRandom (specifically the SHA1PRNG algorithm of the SUN provider) after the initial seeding when I am using a single SecureRandom instance in multiple threads? SecureRandom is thread-safe so that implies some level of potential contention? I don't see anything in Java 8 Javadocs that discusses this for SecureRandom though I see that the Javadocs for Random do specifically warn about contention and performance degradation when using a single Random instance across threads. We are

Ive some questions about Spring Security 3.0.5 and the SecurityContext. First of all, Ill try to conclude what I know: SecurityContextHolder stores SecurityContext Between Request, SecurityContext is stored in HttpSession Begin of Request: SecurityContextHolder gets SecurityContext from HttpSession End of Request: SecurityContextHolder puts SecurityContext in HttpSession During the Request, on the server, SecurityContextHolder uses a ThreadLocal. Everywhere in the application (same request), the SecurityContext can be accessed Now my question.... --> Two Requests: the SecurityContext-instance

As shown in this answer , clang from Xcode on Mac OSX does not support thread_local storage even with C++11 flags set. Even on the latest version, Apple LLVM version 7.0.0 (clang-700.1.76), Target: x86_64-apple-darwin15.0.0, Thread model: posix, does not support thread_local : ../../src/dir/sysArch.h:1505:3: error: thread-local storage is not supported for the current target thread_local ^ rsfinn The version of clang supplied with Xcode 8 (and later) supports the thread_local keyword; see the discussion here . 来源： https://stackoverflow.com/questions/33358417/how-to-get-support-for-thread-local

In Java 8, java.lang.Thread class got 3 new fields: /** The current seed for a ThreadLocalRandom */ @sun.misc.Contended("tlr") long threadLocalRandomSeed; /** Probe hash value; nonzero if threadLocalRandomSeed initialized */ @sun.misc.Contended("tlr") int threadLocalRandomProbe; /** Secondary seed isolated from public ThreadLocalRandom sequence */ @sun.misc.Contended("tlr") int threadLocalRandomSecondarySeed; as it said in Javadoc for being exclusively managed by class java.util.concurrent.ThreadLocalRandom . Furthermore, in ThreadLocalRandom they are used in very freakish way: SEED = UNSAFE

I am working on internationalizing user entered data in a rather large Client/Server (HTTP (Hessian) is used for communication) application which is stored in a database. Users can choose the language they want to see and there is a default language which is used when a translation in the requested language is not present. Currently a data class may look like this: class MyDataClass { private Long id; private String someText; /* getters and setters */ } After internationalization it could look like this: class MyDataClass { private Long id; private Set<LocalizedStrings> localizedStrings; /*

Are backgroundworker threads re-used? Specifically, if I set a named data slot (thread-local storage) during the DoWork() method of a backgroundworker, will the value of that data slot persist, potentially to be found be some other thread at a later time? I wouldn't have thought so, but I have this bug... EDIT: This blog post suggests that BackGroundWorker utilises a ThreadPool , which implies that Threads are re-used. So the question becomes; do re-used threads potentially persist thread-local storage between invocations? When the thread pool reuses a thread, it does not clear the data in