simple_lock(9r)simple_lock(9r)NAMEsimple_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
FILESSEE ALSO
Routines: decl_simple_lock_data(9r), simple_lock_init(9r), sim‐
ple_lock_terminate(9r), simple_lock_try(9r), simple_unlock(9r)
Data Structures: slock(9s)simple_lock(9r)
