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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.1.1.1 1998/09/22 21:05:32 wsanchez
29: * Import of Mac OS X kernel (~semeria)
30: *
31: * Revision 1.1.1.1 1998/03/07 02:25:56 wsanchez
32: * Import of OSF Mach kernel (~mburg)
33: *
34: * Revision 1.1.4.1 1995/04/07 19:02:38 barbou
35: * Merged into mainline.
36: * [95/03/09 barbou]
37: *
38: * Revision 1.1.2.2 1995/02/13 15:35:45 barbou
39: * Merged/ported to MK6.
40: *
41: * Revision 1.1.1.3 94/08/12 15:44:39 barbou
42: * VM Merge - Task Swapper.
43: *
44: * Changed host_priv_t into host_t.
45: * [94/07/28 barbou]
46: *
47: * Revision 1.1.1.2 1994/07/28 15:33:46 barbou
48: * Copied from IK.
49: *
50: * Revision 3.0.3.2 1994/01/20 19:53:01 chasb
51: * Remove excessively restrictive copyright notice
52: * [1994/01/20 17:50:40 chasb]
53: *
54: * Revision 3.0.3.1 1993/12/20 21:06:49 gupta
55: * Expanded C O P Y R I G H T
56: * [1993/12/17 22:19:22 gupta]
57: *
58: * Revision 3.0 1992/12/31 22:08:24 ede
59: * Initial revision for OSF/1 R1.3
60: *
61: * Revision 1.1.4.5 1992/03/16 18:02:52 gmf
62: * Add TASK_SW_ELIGIBLE flag to swap_flags; prototype
63: * task_swapout_eligible, task_swapout_ineligible.
64: * [1992/02/12 22:01:48 gmf]
65: *
66: * Revision 1.1.4.4 1992/01/22 22:14:13 gmf
67: * Change prototype for task_swappable() to use host_priv_t
68: * instead of host_t.
69: * [1992/01/17 17:48:13 gmf]
70: *
71: * Revision 1.1.4.3 1991/12/10 17:20:55 gmf
72: * Add extern declaration for new thread.
73: * Changed TASK_SW_WAIT flag to TASK_SW_WANT_IN.
74: * [1991/12/10 16:19:10 gmf]
75: *
76: * Revision 1.1.4.2 1991/11/21 21:48:35 mmp
77: * initial task swapping code
78: * [1991/11/21 21:01:37 mmp]
79: *
80: * $EndLog$
81: */
82:
83: /*
84: * File: kern/task_swap.h
85: *
86: * Task residency management primitives declarations.
87: */
88:
89: #ifndef _KERN_TASK_SWAP_H_
90: #define _KERN_TASK_SWAP_H_
91:
92: #include <kern/host.h>
93:
94: /*
95: * swap states
96: */
97: #define TASK_SW_UNSWAPPABLE 1 /* not swappable */
98: #define TASK_SW_IN 2 /* swapped in (resident) */
99: #define TASK_SW_OUT 3 /* swapped out (non-resident) */
100: #define TASK_SW_COMING_IN 4 /* about to be swapped in */
101: #define TASK_SW_GOING_OUT 5 /* being swapped out */
102:
103: /*
104: * swap flags
105: */
106: #define TASK_SW_MAKE_UNSWAPPABLE 0x01 /* make it unswappable */
107: #define TASK_SW_WANT_IN 0x02 /* sleeping on state */
108: #define TASK_SW_ELIGIBLE 0x04 /* eligible for swapping */
109:
110: /*
111: * exported routines
112: */
113: extern void task_swapper_init(void);
114: extern kern_return_t task_swapin(
115: task_t, /* task */
116: boolean_t); /* make_unswappable */
117: extern kern_return_t task_swapout(task_t /* task */);
118: extern void task_swapper(void);
119: extern void task_swap_swapout_thread(void);
120: extern void compute_vm_averages(void);
121: extern kern_return_t task_swappable(
122: host_t, /* host */
123: task_t, /* task */
124: boolean_t); /* swappable */
125: extern void task_swapout_eligible(task_t /* task */);
126: extern void task_swapout_ineligible(task_t /* task */);
127: extern void swapout_ast(void);
128:
129: #endif /* _KERN_TASK_SWAP_H_ */
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