projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b A |
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 | * Mach Operating System | |
| 27 | * Copyright (c) 1989 Carnegie-Mellon University | |
| 28 | * Copyright (c) 1988 Carnegie-Mellon University | |
| 29 | * Copyright (c) 1987 Carnegie-Mellon University | |
| 30 | * All rights reserved. The CMU software License Agreement specifies | |
| 31 | * the terms and conditions for use and redistribution. | |
| 32 | */ | |
| 33 | /* | |
| 34 | * HISTORY | |
| 35 | * | |
| 36 | * Revision 1.1.1.1 1998/09/22 21:05:32 wsanchez | |
| 37 | * Import of Mac OS X kernel (~semeria) | |
| 38 | * | |
| 39 | * Revision 1.1.1.1 1998/03/07 02:25:57 wsanchez | |
| 40 | * Import of OSF Mach kernel (~mburg) | |
| 41 | * | |
| 42 | * Revision 1.1.11.7 1995/06/13 18:58:49 bolinger | |
| 43 | * Fix ri-osc CR1391: New return type from thread_swapin_blocking(). | |
| 44 | * [1995/06/13 18:56:52 bolinger] | |
| 45 | * | |
| 46 | * Revision 1.1.11.6 1995/06/05 21:46:36 dwm | |
| 47 | * ri-osc CR1357 - ensure activation being returned to is swapped in. | |
| 48 | * added thread_swapin_blocking [bolinger] | |
| 49 | * [1995/06/05 21:34:08 dwm] | |
| 50 | * | |
| 51 | * Revision 1.1.11.5 1995/05/19 15:48:34 bernadat | |
| 52 | * Let thread swapping be configurable. | |
| 53 | * [95/05/19 bernadat] | |
| 54 | * | |
| 55 | * Revision 1.1.11.4 1995/04/07 19:04:46 barbou | |
| 56 | * Merged into mainline. | |
| 57 | * [95/03/09 barbou] | |
| 58 | * | |
| 59 | * Revision 1.1.12.2 1995/02/13 15:59:18 barbou | |
| 60 | * Merged/ported to MK6. | |
| 61 | * | |
| 62 | * Revision 1.1.9.3 1994/08/12 14:22:30 barbou | |
| 63 | * Overwritten with copy from IK. | |
| 64 | * Old kern/thread_swap.h was renamed kern/thread_handoff.c. | |
| 65 | * Added prototype for thread_swapout and thread_swapout_enqueue. | |
| 66 | * [94/07/28 barbou] | |
| 67 | * | |
| 68 | * Revision 3.0.3.2 1994/01/20 19:53:20 chasb | |
| 69 | * Remove excessively restrictive copyright notice | |
| 70 | * [1994/01/20 17:50:56 chasb] | |
| 71 | * | |
| 72 | * Revision 3.0.3.1 1993/12/20 21:07:59 gupta | |
| 73 | * Expanded C O P Y R I G H T | |
| 74 | * [1993/12/17 22:19:43 gupta] | |
| 75 | * | |
| 76 | * Revision 3.0 1992/12/31 22:08:45 ede | |
| 77 | * Initial revision for OSF/1 R1.3 | |
| 78 | * | |
| 79 | * Revision 1.6.2.2 1992/01/22 22:14:42 gmf | |
| 80 | * Added TH_SW_TASK_SWAPPING flag to swap_state. This state | |
| 81 | * indicates that the thread is about to be swapped out by | |
| 82 | * the task swapping mechanism, and prevents the thread | |
| 83 | * swapper from doing it first. | |
| 84 | * [1992/01/20 22:06:36 gmf] | |
| 85 | * | |
| 86 | * Revision 1.6 1991/08/15 19:16:39 devrcs | |
| 87 | * Prototype all functions, change name to thread_swapper_init. | |
| 88 | * [91/06/26 10:45:44 jeffc] | |
| 89 | * | |
| 90 | * Revision 1.5 91/06/10 16:19:07 devrcs | |
| 91 | * Additions to allow thread to be made non-swappable on swap in, | |
| 92 | * change thread_swapin interface. | |
| 93 | * [91/05/30 15:56:38 jeffc] | |
| 94 | * | |
| 95 | * Revision 1.4 91/03/04 17:07:14 devrcs | |
| 96 | * A small step toward ansiC: commented else/endif/elif trailers. | |
| 97 | * [91/01/12 16:39:43 dwm] | |
| 98 | * | |
| 99 | * Revision 1.3 90/10/07 13:57:13 devrcs | |
| 100 | * Added EndLog Marker. | |
| 101 | * [90/09/28 09:59:56 gm] | |
| 102 | * | |
| 103 | * Revision 1.2 90/01/02 20:06:28 gm | |
| 104 | * Fixes for first snapshot. | |
| 105 | * | |
| 106 | * Revision 1.1 89/10/16 19:36:28 gm | |
| 107 | * Mach 2.5 and Encore 0.6 merge | |
| 108 | * | |
| 109 | * Revision 2.4 89/03/09 20:17:07 rpd | |
| 110 | * More cleanup. | |
| 111 | * | |
| 112 | * Revision 2.3 89/02/25 18:10:24 gm0w | |
| 113 | * Kernel code cleanup. | |
| 114 | * Put entire file under #indef KERNEL. | |
| 115 | * [89/02/15 mrt] | |
| 116 | * | |
| 117 | * Revision 0.0 88/01/21 dbg | |
| 118 | * Created. | |
| 119 | * [88/01/21 dbg] | |
| 120 | * | |
| 121 | * $EndLog$ | |
| 122 | */ | |
| 123 | /* | |
| 124 | * File: kern/thread_swap.h | |
| 125 | * | |
| 126 | * Declarations of thread swap_states and swapping routines. | |
| 127 | */ | |
| 128 | ||
| 129 | /* | |
| 130 | * Swap states for threads. | |
| 131 | */ | |
| 132 | ||
| 133 | #ifndef _KERN_THREAD_SWAP_H_ | |
| 134 | #define _KERN_THREAD_SWAP_H_ | |
| 135 | ||
| 136 | #if 1 /* USED CODE */ | |
| 137 | ||
| 138 | /* | |
| 139 | * exported routines | |
| 140 | */ | |
| 141 | ||
| 142 | extern void swapper_init(); | |
| 143 | extern void thread_swapin(thread_t thread); | |
| 144 | extern void thread_doswapin(thread_t thread); | |
| 145 | extern void swapin_thread(); | |
| 146 | ||
| 147 | #define thread_swappable(act, bool) | |
| 148 | ||
| 149 | ||
| 150 | #else /* UNUSED SWAPPER CODE */ | |
| 151 | #if THREAD_SWAPPER | |
| 152 | #define TH_SW_STATE 7 /* mask of swap state bits */ | |
| 153 | #define TH_SW_UNSWAPPABLE 1 /* not swappable */ | |
| 154 | #define TH_SW_IN 2 /* swapped in */ | |
| 155 | #define TH_SW_GOING_OUT 3 /* being swapped out */ | |
| 156 | #define TH_SW_WANT_IN 4 /* being swapped out, but should | |
| 157 | immediately be swapped in */ | |
| 158 | #define TH_SW_OUT 5 /* swapped out */ | |
| 159 | #define TH_SW_COMING_IN 6 /* queued for swapin, or being | |
| 160 | swapped in */ | |
| 161 | ||
| 162 | #define TH_SW_MAKE_UNSWAPPABLE 8 /*not state, command to swapin_thread */ | |
| 163 | ||
| 164 | /* | |
| 165 | * This flag is only used by the task swapper. It implies that | |
| 166 | * the thread is about to be swapped, but hasn't yet. | |
| 167 | */ | |
| 168 | #define TH_SW_TASK_SWAPPING 0x10 | |
| 169 | ||
| 170 | /* | |
| 171 | * exported routines | |
| 172 | */ | |
| 173 | extern void thread_swapper_init(void); | |
| 174 | extern void swapin_thread(void); | |
| 175 | extern void swapout_thread(void); | |
| 176 | extern void thread_doswapin(thread_act_t thr_act); | |
| 177 | extern void thread_swapin(thread_act_t thr_act, | |
| 178 | boolean_t make_unswappable); | |
| 179 | extern boolean_t | |
| 180 | thread_swapin_blocking(thread_act_t thr_act); | |
| 181 | extern void thread_swapout(thread_act_t thr_act); | |
| 182 | extern void swapout_threads(boolean_t now); | |
| 183 | extern void thread_swapout_enqueue(thread_act_t thr_act); | |
| 184 | extern void thread_swap_disable(thread_act_t thr_act); | |
| 185 | ||
| 186 | extern void thread_swappable(thread_act_t thr_act, boolean_t swappable); | |
| 187 | ||
| 188 | #else /* THREAD_SWAPPER */ | |
| 189 | #define thread_swappable(thr_act, swappable) | |
| 190 | #endif /* THREAD_SWAPPER */ | |
| 191 | ||
| 192 | #endif /* UNUSED SWAPPER CODE */ | |
| 193 | ||
| 194 | #endif /*_KERN_THREAD_SWAP_H_*/ | |
| 195 |