osfmk/kern/task_swap.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  *              File:   kern/task_swap.c
  30  *
  31  *      Task residency management primitives implementation.
  32  */
  33 #include <mach_assert.h>
  34 #include <task_swapper.h>
  35
  36 #include <kern/spl.h>
  37 #include <kern/lock.h>
  38 #include <kern/queue.h>
  39 #include <kern/host.h>
  40 #include <kern/task.h>
  41 #include <kern/task_swap.h>
  42 #include <kern/thread.h>
  43 #include <kern/thread_swap.h>
  44 #include <kern/host_statistics.h>
  45 #include <kern/misc_protos.h>
  46 #include <kern/assert.h>
  47 #include <mach/policy.h>
  48
  49 #include <ipc/ipc_port.h>       /* We use something from in here */
  50
  51 /*
  52  *      task_swappable: [exported]
  53  *
  54  *      Make a task swappable or non-swappable. If made non-swappable,
  55  *      it will be swapped in.
  56  */
  57 kern_return_t
  58 task_swappable(
  59         host_priv_t host_priv,
  60         task_t task,
  61         boolean_t make_swappable)
  62 {
  63         if (host_priv == HOST_PRIV_NULL)
  64                 return (KERN_INVALID_ARGUMENT);
  65
  66         if (task == TASK_NULL)
  67                 return (KERN_INVALID_ARGUMENT);
  68
  69         /*
  70          * We don't support swapping, this call is purely advisory.
  71          */
  72         return (KERN_SUCCESS);
  73 }