Hi, Le Mon, 30 Jul 2007 10:29:43 +0100 (BST), hari krishna angadi <reachtohari@xxxxxxxxx> a écrit : > i am porting user code as kernel code.in user code pthreads is > used i want respective in kernel.pthread_mutex_t and > PTHREAD_MUTEX_INITIALIZER is used in user code Inside the kernel, there are various synchronization methods, each of which is useful for a particular use case. You can learn about locking in the Unreliable Guide to Locking [1], from Rusty Russell. It however hasn't been updated since 2003, so it's a bit out-of-date. For a bit more up-to-date informations, you can read the Chapter 5 of Linux Device Drivers, entitled: «Concurrency and Race Conditions» [2]. If what you're looking for is exactly mutexes, then the kernel has mutexes. See [3] for a quick overview of the API and [4] for a documentation of the functions. The API is fairly simple. However, be careful: porting user code to kernel code is not always a good idea. For what reason are you porting your code to the kernel ? What is it doing ? Why can't it be done in userspace ? Sincerly, Thomas [1] http://www.kernel.org/pub/linux/kernel/people/rusty/kernel-locking/ [2] http://lwn.net/images/pdf/LDD3/ch05.pdf [3] http://lxr.free-electrons.com/source/Documentation/mutex-design.txt#115 [4] http://lxr.free-electrons.com/source/kernel/mutex.c -- PETAZZONI Thomas - thomas.petazzoni@xxxxxxxx http://{thomas,sos,kos}.enix.org - Jabber: thomas.petazzoni@xxxxxxxxx http://{agenda,livret}dulibre.org - http://www.toulibre.org Fingerprint : 0BE1 4CF3 CEA4 AC9D CC6E 1624 F653 CB30 98D3 F7A7
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