> > The linux kernel does not support the concept of threads (there are > > no thread system calls). the only system calls for achieving this > > somultaneous mechanism would be fork() and exec(). The pthreads library > > used these system calls. > > you are mistaken. > threads (roughly speaking) are two active entities, running in the same > address space, so using exec or fork can not (EVER) achieve such > behavior. > pthread uses the clone system call, which does implements > threads (of some kind, anyway). > > (actually, pthread uses clone with the following flags: > flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND. look at man 2 clone > for explanations.) > yes what nir said is right since fork or exec create a seperate process context, whereas two threads run in a single process context both having access to the memory of the process that creates them. Hence, i think creating threads using exec() and fork() is not possible. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
