Toto je este pravda? Ak ano, tak zacinam trosku lutovat, ze som si pre projekt vybral python.

http://linuxgazette.net/107/pai.html

Currently, The Python Interpreter (Python 2.3.4) is not thread safe. There are no priorities, no thread groups. Threads cannot be stopped and suspended, resumed or interrupted. That is, the support provided is very much basic. However a lot can still be accomplished with this meager support, with the use of the threading module, as we shall see in the following sections. One of the main reasons is that in actuality only one thread is running at a time. This is because of some thing called a Global Interpreter Lock (GIL). In order to support multi-threaded Python programs, there's a global lock that must be held by the current thread before it can safely access Python objects. Without the lock competing threads could cause havoc, for example: when two threads simultaneously increment the reference count of the same object, the reference count could end up being incremented only once instead of twice. Thus only the thread that has acquired the GIL may operate on Python Objects or call Python C API functions.

In order to support multi threaded Python programs the interpreter regularly releases and reacquires the lock, by default every 10 bytecode instructions. This can however be changed using the sys.setcheckinterval() function. The lock is also released and reacquired around potentially blocking I/O operations like reading or writing a file, so that other threads can run while the thread that requests the I/O is waiting for the I/O operation to complete.