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lock_try_write(9r)
NAME
  lock_try_write - General: Tries to assert a complex lock with write access

SYNOPSIS
  #include <kern/lock.h>

  boolean_t lock_try_write(
	  lock_t lock_structptr );

ARGUMENTS
  lock_structptr
      Specifies a pointer to the complex lock structure, lock. This is the
      lock structure associated with the resource on which you want to try to
      assert write access. The lock structure is an opaque data structure;
      that is, its associated members are referenced and manipulated by the
      Tru64 UNIX operating system and not by the user of the complex lock
      mechanism.

DESCRIPTION
  The lock_try_write routine tries to assert a complex lock (without
  blocking) with write access for the resource associated with the specified
  lock structure pointer. To release a complex lock with write access
  successfully asserted by lock_try_write, call the lock_done routine.

NOTES
  You must call lock_init (once only) prior to calling lock_try_write to
  initialize the lock structure pointer 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
  The lock_try_write routine returns one of the following values:

  TRUE	  The attempt to acquire the write complex lock was successful.

  FALSE	  The attempt to acquire the write complex lock was unsuccessful.

FILES
  <lock.h>

SEE ALSO
  Routines: lock_done(9r), lock_terminate(9r), lock_try_read(9r),
  lock_write(9r)

  Data Structures: lock(9s)

Index for Section 9r

Alphabetical listing for L

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