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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_FREE_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 02:25:57 wsanchez
32: * Import of OSF Mach kernel (~mburg)
33: *
34: * Revision 1.1.7.4 1995/01/18 18:35:03 ezf
35: * updated Utah CR notice
36: * [1995/01/18 18:30:36 ezf]
37: *
38: * Revision 1.1.7.3 1995/01/10 05:15:24 devrcs
39: * mk6 CR801 - merge up from nmk18b4 to nmk18b7
40: * * Rev 1.1.8.2 1994/11/08 15:33:03 watkins
41: * Add declaration for thread_pool_put_act.
42: * [1994/12/09 21:10:56 dwm]
43: *
44: * Revision 1.1.7.1 1994/09/23 02:31:15 ezf
45: * change marker to not FREE
46: * [1994/09/22 21:38:04 ezf]
47: *
48: * Revision 1.1.2.9 1994/06/09 14:14:07 dswartz
49: * Preemption merge.
50: * [1994/06/09 14:08:37 dswartz]
51: *
52: * Revision 1.1.2.8 1994/06/01 19:30:14 bolinger
53: * mk6 CR125: Update to reflect changes in access to thread_pool
54: * of a thread_act.
55: * [1994/06/01 19:18:25 bolinger]
56: *
57: * Revision 1.1.2.7 1994/03/17 22:38:37 dwm
58: * The infamous name change: thread_activation + thread_shuttle = thread.
59: * [1994/03/17 21:28:18 dwm]
60: *
61: * Revision 1.1.2.6 1994/02/09 00:42:42 dwm
62: * Put a variety of debugging code under MACH_ASSERT,
63: * to enhance PROD performance a bit.
64: * [1994/02/09 00:35:13 dwm]
65: *
66: * Revision 1.1.2.5 1994/01/21 23:45:08 dwm
67: * Thread_pools now embedded directly in port/pset,
68: * delete refcount, modify protos.
69: * [1994/01/21 23:43:13 dwm]
70: *
71: * Revision 1.1.2.4 1994/01/17 19:09:32 dwm
72: * Fix ref/dealloc macros, missing semicolon.
73: * [1994/01/17 19:09:16 dwm]
74: *
75: * Revision 1.1.2.3 1994/01/17 18:08:57 dwm
76: * Add finer grained act tracing.
77: * [1994/01/17 16:06:54 dwm]
78: *
79: * Revision 1.1.2.2 1994/01/14 18:42:05 bolinger
80: * Update to reflect thread_pool_block() -> thread_pool_get_act() name
81: * change.
82: * [1994/01/14 18:18:40 bolinger]
83: *
84: * Revision 1.1.2.1 1994/01/12 17:53:21 dwm
85: * Coloc: initial restructuring to follow Utah model.
86: * [1994/01/12 17:15:24 dwm]
87: *
88: * $EndLog$
89: */
90: /*
91: * Copyright (c) 1993 The University of Utah and
92: * the Computer Systems Laboratory (CSL). All rights reserved.
93: *
94: * Permission to use, copy, modify and distribute this software and its
95: * documentation is hereby granted, provided that both the copyright
96: * notice and this permission notice appear in all copies of the
97: * software, derivative works or modified versions, and any portions
98: * thereof, and that both notices appear in supporting documentation.
99: *
100: * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
101: * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
102: * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
103: *
104: * CSL requests users of this software to return to [email protected] any
105: * improvements that they make and grant CSL redistribution rights.
106: *
107: * Author: Bryan Ford, University of Utah CSL
108: *
109: * File: thread_pool.h
110: *
111: * Defines the thread_pool: a pool of available activations.
112: *
113: */
114:
115: #ifndef _KERN_THREAD_POOL_H_
116: #define _KERN_THREAD_POOL_H_
117:
118: #include <mach/kern_return.h>
119: #include <kern/lock.h>
120: #include <mach_assert.h>
121:
122: typedef struct thread_pool {
123:
124: /* List of available activations, all active but not in use. */
125: struct thread_activation *thr_acts;
126:
127: /* true if somebody is waiting for an activation from this pool */
128: int waiting;
129:
130: } thread_pool, *thread_pool_t;
131: #define THREAD_POOL_NULL ((thread_pool_t)0)
132:
133: /* Exported to kern/startup.c only */
134: kern_return_t thread_pool_init(thread_pool_t new_thread_pool);
135:
136: /* Get an activation from a thread_pool, blocking if need be */
137: extern struct thread_activation *thread_pool_get_act( ipc_port_t );
138: extern void thread_pool_put_act( thread_act_t );
139:
140: /* Wake up a waiter upon return to thread_pool */
141: extern void thread_pool_wakeup( thread_pool_t );
142:
143: #if MACH_ASSERT
144: /*
145: * Debugging support - "watchacts", a patchable selective trigger
146: */
147: extern unsigned int watchacts; /* debug printf trigger */
148: #define WA_SCHED 0x001 /* kern/sched_prim.c */
149: #define WA_THR 0x002 /* kern/thread.c */
150: #define WA_ACT_LNK 0x004 /* kern/thread_act.c act mgmt */
151: #define WA_ACT_HDLR 0x008 /* kern/thread_act.c act hldrs */
152: #define WA_TASK 0x010 /* kern/task.c */
153: #define WA_BOOT 0x020 /* bootstrap,startup.c */
154: #define WA_PCB 0x040 /* machine/pcb.c */
155: #define WA_PORT 0x080 /* ports + port sets */
156: #define WA_EXIT 0x100 /* exit path */
157: #define WA_SWITCH 0x200 /* context switch (!!) */
158: #define WA_STATE 0x400 /* get/set state (!!) */
159: #define WA_ALL (~0)
160: #endif /* MACH_ASSERT */
161:
162: #endif /* _KERN_THREAD_POOL_H_ */
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