Annotation of sys/dev/raidframe/rf_threadstuff.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: rf_threadstuff.h,v 1.8 2002/12/16 07:01:05 tdeval Exp $ */
2: /* $NetBSD: rf_threadstuff.h,v 1.8 2000/06/11 03:35:38 oster Exp $ */
3:
4: /*
5: * Copyright (c) 1995 Carnegie-Mellon University.
6: * All rights reserved.
7: *
8: * Author: Mark Holland, Daniel Stodolsky, Jim Zelenka
9: *
10: * Permission to use, copy, modify and distribute this software and
11: * its documentation is hereby granted, provided that both the copyright
12: * notice and this permission notice appear in all copies of the
13: * software, derivative works or modified versions, and any portions
14: * thereof, and that both notices appear in supporting documentation.
15: *
16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19: *
20: * Carnegie Mellon requests users of this software to return to
21: *
22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23: * School of Computer Science
24: * Carnegie Mellon University
25: * Pittsburgh PA 15213-3890
26: *
27: * any improvements or extensions that they make and grant Carnegie the
28: * rights to redistribute these changes.
29: */
30:
31: /*
32: * threadstuff.h -- Definitions for threads, locks, and synchronization.
33: *
34: * The purpose of this file is provide some illusion of portability.
35: * If the functions below can be implemented with the same semantics on
36: * some new system, then at least the synchronization and thread control
37: * part of the code should not require modification to port to a new machine.
38: * The only other place where the pthread package is explicitly used is
39: * threadid.h
40: *
41: * This file should be included above stdio.h to get some necessary defines.
42: *
43: */
44:
45: #ifndef _RF__RF_THREADSTUFF_H_
46: #define _RF__RF_THREADSTUFF_H_
47:
48: #include "rf_types.h"
49: #include <sys/types.h>
50: #include <sys/param.h>
51: #ifdef _KERNEL
52: #include <sys/systm.h>
53: #include <sys/proc.h>
54: #include <sys/kthread.h>
55: #endif
56:
57: #define rf_create_managed_mutex(a,b) \
58: _rf_create_managed_mutex(a,b,__FILE__,__LINE__)
59: #define rf_create_managed_cond(a,b) \
60: _rf_create_managed_cond(a,b,__FILE__,__LINE__)
61: #define rf_init_managed_threadgroup(a,b) \
62: _rf_init_managed_threadgroup(a,b,__FILE__,__LINE__)
63: #define rf_init_threadgroup(a) \
64: _rf_init_threadgroup(a,__FILE__,__LINE__)
65: #define rf_destroy_threadgroup(a) \
66: _rf_destroy_threadgroup(a,__FILE__,__LINE__)
67:
68: int _rf_init_threadgroup(RF_ThreadGroup_t *, char *, int);
69: int _rf_destroy_threadgroup(RF_ThreadGroup_t *, char *, int);
70: int _rf_init_managed_threadgroup(RF_ShutdownList_t **, RF_ThreadGroup_t *,
71: char *, int);
72:
73: #include <sys/lock.h>
74: #define decl_simple_lock_data(a,b) a struct simplelock b
75: #define simple_lock_addr(a) ((struct simplelock *)&(a))
76:
77: typedef struct proc *RF_Thread_t;
78: typedef void *RF_ThreadArg_t;
79:
80: #define RF_DECLARE_MUTEX(_m_) decl_simple_lock_data(,(_m_))
81: #define RF_DECLARE_STATIC_MUTEX(_m_) decl_simple_lock_data(static,(_m_))
82: #define RF_DECLARE_EXTERN_MUTEX(_m_) decl_simple_lock_data(extern,(_m_))
83:
84: #define RF_DECLARE_COND(_c_) int _c_
85: #define RF_DECLARE_STATIC_COND(_c_) static int _c_
86: #define RF_DECLARE_EXTERN_COND(_c_) extern int _c_
87:
88: #define RF_LOCK_MUTEX(_m_) simple_lock(&(_m_))
89: #define RF_UNLOCK_MUTEX(_m_) simple_unlock(&(_m_))
90:
91: /*
92: * In Net- and OpenBSD, kernel threads are simply processes that share several
93: * substructures and never run in userspace.
94: */
95: #define RF_WAIT_COND(_c_,_m_) do { \
96: RF_UNLOCK_MUTEX(_m_); \
97: tsleep(&_c_, PRIBIO, "rfwcond", 0); \
98: RF_LOCK_MUTEX(_m_); \
99: } while (0)
100: #define RF_SIGNAL_COND(_c_) wakeup(&(_c_))
101: #define RF_BROADCAST_COND(_c_) wakeup(&(_c_))
102: #define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \
103: kthread_create((void (*)(void *))(_func_), (void *)(_arg_), \
104: (struct proc **)&(_handle_), _name_)
105:
106: struct RF_ThreadGroup_s {
107: int created;
108: int running;
109: int shutdown;
110: RF_DECLARE_MUTEX (mutex);
111: RF_DECLARE_COND (cond);
112: };
113:
114: /*
115: * Someone has started a thread in the group.
116: */
117: #define RF_THREADGROUP_STARTED(_g_) do { \
118: RF_LOCK_MUTEX((_g_)->mutex); \
119: (_g_)->created++; \
120: RF_UNLOCK_MUTEX((_g_)->mutex); \
121: } while (0)
122:
123: /*
124: * Thread announcing that it is now running.
125: */
126: #define RF_THREADGROUP_RUNNING(_g_) do { \
127: RF_LOCK_MUTEX((_g_)->mutex); \
128: (_g_)->running++; \
129: RF_UNLOCK_MUTEX((_g_)->mutex); \
130: RF_SIGNAL_COND((_g_)->cond); \
131: } while (0)
132:
133: /*
134: * Thread announcing that it is now done.
135: */
136: #define RF_THREADGROUP_DONE(_g_) do { \
137: RF_LOCK_MUTEX((_g_)->mutex); \
138: (_g_)->shutdown++; \
139: RF_UNLOCK_MUTEX((_g_)->mutex); \
140: RF_SIGNAL_COND((_g_)->cond); \
141: } while (0)
142:
143: /*
144: * Wait for all threads to start running.
145: */
146: #define RF_THREADGROUP_WAIT_START(_g_) do { \
147: RF_LOCK_MUTEX((_g_)->mutex); \
148: while((_g_)->running < (_g_)->created) { \
149: RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
150: } \
151: RF_UNLOCK_MUTEX((_g_)->mutex); \
152: } while (0)
153:
154: /*
155: * Wait for all threads to stop running.
156: */
157: #if !defined(__NetBSD__) && !defined(__OpenBSD__)
158: #define RF_THREADGROUP_WAIT_STOP(_g_) do { \
159: RF_LOCK_MUTEX((_g_)->mutex); \
160: RF_ASSERT((_g_)->running == (_g_)->created); \
161: while((_g_)->shutdown < (_g_)->running) { \
162: RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
163: } \
164: RF_UNLOCK_MUTEX((_g_)->mutex); \
165: } while (0)
166: #else
167: /*
168: * XXX Note that we've removed the assert. That should be put back in once
169: * we actually get something like a kernel thread running.
170: */
171: #define RF_THREADGROUP_WAIT_STOP(_g_) do { \
172: RF_LOCK_MUTEX((_g_)->mutex); \
173: while((_g_)->shutdown < (_g_)->running) { \
174: RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \
175: } \
176: RF_UNLOCK_MUTEX((_g_)->mutex); \
177: } while (0)
178: #endif
179:
180:
181: int rf_mutex_init(struct simplelock *);
182: int rf_mutex_destroy(struct simplelock *);
183: int _rf_create_managed_mutex(RF_ShutdownList_t **, struct simplelock *,
184: char *, int);
185: int _rf_create_managed_cond(RF_ShutdownList_t ** listp, int *, char *, int);
186:
187: int rf_cond_init(int *);
188: int rf_cond_destroy(int *);
189:
190: #endif /* !_RF__RF_THREADSTUFF_H_ */
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