Hi RTL-Folks, Does somebody have some answers for the following question?
You have two RTL threads and a global integer variable which is initial set to zero. Thread one will change the global integer variable without the use of any synchronisation mechanism to a new value. After that, thread one will wakeup thread two and suspend himself. Now the question: What value will thread two see in the global integer variable after the wakeup - zero or the new value set by thread one? - Where is the integer value physically stored? - will processor caches and memory management have influence for the visibillity of the integer value in the second thread? With other words can i assume that the change of an integer variable is an atomic instruction, or is it necessary to use a mutex for write and read operations off integers to be shure that global interger data is recent in all threads? What about the use of memory barriers in RTL-Threads? In the moment i use a single processor Athlon XP 2GHz, but i like to keep code portable to other processors and multiprocessor environments sorry for cunfusing you, Thomas Sauter _______________________________________________ Rtl mailing list [EMAIL PROTECTED] http://www2.fsmlabs.com/mailman/listinfo.cgi/rtl
