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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
  slock_ptr
      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
  <lock.h>

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)

Index for Section 9r

Alphabetical listing for S

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