VR-Link is not thread-safe. However, it is possible to use VR-Link in multithreaded applications. You simply need to make sure that your VR-Link stuff is all in the same thread. So long as this is the case, VR-Link should work fine. The one case where the current version of VR-Link has problems is in applications where two completely independent threads both want to use VR-Link classes.

The compiler in use reports a thread model other than 'single'. This can be tested via output from gcc -v. Multi-thread capable versions of gcc output something like this: %gcc -v Using built-in specs. ... Thread model: posix gcc version 4.1.2 20070925 (Red Hat 4.1.2-33) Requisite command-line flags are used for atomic operations and threading. Examples of this include -pthread and -march=native, although specifics vary depending on the host environment. See Machine Dependent Options.

Generally, no (but see the next question). Many components of MapServer use static or global data that could potentially be modified by another thread. Under heavy load these unlikely events become inevitable, and could result in sporadic errors.

Vertical Reader, a shareware program for reading ASCII text files while holding the 200LX with the hinge vertical, like a book. VR has several attractive fonts available, and allows searching for regular expressions. This shareware may be registered by merely sending a postcard to the author, or by donating $10.00 to Project Gutenberg, an organization which makes public-domain documents and literature freely available in ASCII text form.

Yes. However, you should be aware that not everyone uses the phrase "thread safe" the same way. See our discussion of thread safety for our design goals.

The init() method is guaranteed to be called once per servlet instance, when the servlet is loaded. You don't have to worry about thread safety inside this method, since it is only called by a single thread, and the web server will wait until that thread exits before sending any more threads into your service() method. Every new client request generates (or allocates) a new thread; that thread calls the service() method of your servlet (which may in turn call doPost(), doGet() and so forth).

Recently, all of the thread IDs changed. So, if a thread was linked before February 2006, the link will probably take you to a different thread entirely. To convert the old thread link into the correct link, go to the link converter and enter the old link, and the link converter will give you the new link to the thread.

Tribal Vocational Rehabilitation services are offered on a personalized and individualized basis where consumers work one-on-one with a VR Counselor and/or a Rehabilitation Technician. The consumer and VR Counselor work as part of a team that custom tailors a rehabilitation plan that offers the most benefits to the consumer.

OEChem is designed to be thread safe, i.e., re-entrant, but as of v1.4.0 there are known areas where OEChem is not re-entrant, namely, OEThrow, and generic data (e.g. SetData/GetData). In addition, C++ STL streams are normally not thread safe, so OEChem streams are also not thread safe. Multithreaded code can be written by selective use of OEChem, but the forbidden zones are not yet well established. At the very least, separate threads should not operate on the same molecules.

Toolkit fully supports the POSIX Threads API, and the run time libraries are thread safe. Toolkit also provides emulation layers for Solaris and DCE threads. Refer to the Porting Threaded Applications chapter of the Cross-Platform Developer's Guide for more details. Yes, Toolkit provides a mechanism to change thread priorities. The APIs pthread_setschedparam(), getpriority(), setpriority(), and nice() are available.

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We've made some preliminary efforts at making the BeBOP Utility Library thread-safe, using Pthreads constructions. This code is disabled by default; you can enable it by setting use-pthreads=1 at the top of both Makefiles. In particular, logging (bebop_util/log.h) and random number generation (bebop_util/random_number.h) are protected. We also made efforts to remove calls to non-thread-safe functions such as strtok().

Threads provide a means of running code routines simultaneously. Local variables are separately maintained in threads so those are not a problem. Any global variables are a problem. Cogencee generates global variables so this means that Cogencee is not thread safe.

Yes, the SigLib library has been written to be completely multi-thread safe. All variables are either local to each function call or are maintained but the calling thread.

Usually, the state pattern describes the state of the context object at any point of time, all we need to do is to protect the state handler object from accepting more than one message at a time. So if more than one thread is sending messages to the same state handler object, The object needs to be protected. So the generated code is not thread safe as such. Put sending of messages in a critical section so that multiple threads wont send messages at a time and it will become thread safe.

No, this would incur a significant performance penalty for users that do not require a thread safe library. Instead, synchronize your own code to ensure multiple threads do not access the same FTPClient object. I want to get access to the InputStream of the incoming data, but I can only find a get() method that takes an OutputStream. The underlying InputStream for data is deliberately not made available. Failure to close this stream at the appropriate point will cause FTP operations to hang.

This is not a question that has a simple yes/no answer. Here are the rules for using XML4C in a multi-threaded environment: Within an address space, an instance of the parser may be used without restriction from a single thread, or an instance of the parser can be accessed from multiple threads, provided the application guarantees that only one thread has entered a method of the parser at any one time.

LAM is "thread safe" in that MPI programs may use multiple threads. It is not safe, however, to have multiple threads simultaneously executing in the MPI library. If user programs utilized multiple threads, they must ensure that only one thread uses LAM at a time. Unpredictable results (read: crash and burn) will occur if multiple threads access LAM simultaneously. There are plans to make LAM have the ability to allow multiple threads simultaneously executing within the MPI library.

I have written plenty of non-thread-safe Singletons but it wasn't until recently when I tracked it down that I realized that thread-safety could be a big problem. The problem is that in the typical Singleton implementation (at least the ones I've seen) there is the ability to create multiple versions of the single instance...I know, "But How?". Well, in the getInstance() call the instance is checked for null, and then immediately constructed if it is null, and then the instance is returned.

Yes, log4j is thread-safe. Log4j components are designed to be used in heavily multithreaded systems.

This is not a question that has a simple yes/no answer. Here are the rules for using Xerces-C++ in a multi-threaded environment: Within an address space, an instance of the parser may be used without restriction from a single thread, or an instance of the parser can be accessed from multiple threads, provided the application guarantees that only one thread has entered a method of the parser at any one time.

i want to add different resource bundle for different module in struts I'm doing validation using validation.XML,and not using bean:message how to implement different resource bundle and internationalization

The Stator. I suspect that the experiment of installing a used GS stator might be of great interest to those who need more output for accessories. But they might be of no better quality. Mine did not go bad from being overloaded! I have to stress that. I'd suspect it could be done, maybe the stator would require the GS flywheel rotor (different magnet pack, different dimensions/shape) and/or the GS cover, or mods to the classic cover.

Go to the post that you would like to link to and then right click on the number of that post (beside reputation scale), go to Properties and copying the url and then paste it into your post.

Yes (with limitations: an SSL connection may not concurrently be used by multiple threads). On Windows and many Unix systems, OpenSSL automatically uses the multi-threaded versions of the standard libraries. If your platform is not one of these, consult the INSTALL file. Multi-threaded applications must provide two callback functions to OpenSSL by calling CRYPTO_set_locking_callback() and CRYPTO_set_id_callback(). (For OpenSSL 0.9.