On Mon, Jan 14, 2002 at 10:00:10PM -0500, Michael Zhu wrote: > Hi, does Linux have the concept of thread? How can I > create a thread in my application? I can use the > fork() to create a process. Is there any API to create > a thread? I know in kernel mode kernel_thread() can be > used to create a thread in kernel mode. What is that > in user mode? There is no difference between threads and processes in Linux. The basic scheduling item is a task, and a task is an execution entity. Execution entities run within a protection domain. When you have a single execution entity within a single protection domain, we traditionally call it a process; when there are multiple execution entities in a protection domain, we call it multi-threading. The clone() system call allows you to create new tasks. POSIX threads are implemented on top of the clone system call, just link with the pthread library to use them. Erik -- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
