lock(9) [netbsd man page]

LOCK(9) 						   BSD Kernel Developer's Manual						   LOCK(9)

NAME

     lock, simple_lock_init, simple_lock, simple_lock_try, simple_unlock, simple_lock_freecheck, simple_lock_dump, lockinit, lockmgr, lockstatus,
     lockmgr_printinfo, spinlockinit, spinlockmgr -- kernel lock functions

DESCRIPTION

     These interfaces have been obsoleted and removed from the system.

     Please see the condvar(9), mutex(9), and rwlock(9) manual pages for information on kernel synchronisation primitives.

SEE ALSO

     condvar(9), mutex(9), rwlock(9)

HISTORY

     The kernel locking API first appeared in 4.4BSD-lite2, and was replaced in NetBSD 5.0.

BSD
								 January 30, 2008							       BSD

simple_lock(9r) 														   simple_lock(9r)

NAME

       simple_lock - General: Asserts a simple lock

SYNOPSIS

       #include <kern/lock.h>

       void simple_lock(
	       simple_lock_t slock_ptr );

ARGUMENTS

       Specifies a pointer to a simple lock structure. You can declare this simple lock structure by using the decl_simple_lock_data routine.

DESCRIPTION

       The  simple_lock  routine asserts a lock with exclusive access for the resource associated with the specified slock structure pointer. This
       means that no other kernel thread can gain access to the locked resource until you call simple_unlock to release it. Because  simple  locks
       are spin locks, simple_lock does not return until the lock has been obtained.

NOTES

       You  must  call	simple_lock_init  (once  only)	prior  to  calling simple_lock to initialize the simple lock structure for the resource. A
       resource, from the kernel module's standpoint, is data that more than one kernel thread can manipulate.	You  can  store  the  resource	in
       global variables and in data structure members.

RETURN VALUES

       None

FILES

SEE ALSO

       Routines: decl_simple_lock_data(9r), simple_lock_init(9r), simple_lock_terminate(9r), simple_lock_try(9r), simple_unlock(9r)

       Data Structures: slock(9s)

																   simple_lock(9r)