pthread_int.h revision 1.1.2.4 1 /* $NetBSD: pthread_int.h,v 1.1.2.4 2001/07/13 02:42:38 nathanw Exp $ */
2
3 /*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Nathan J. Williams.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 #ifndef _LIB_PTHREAD_INT_H
40 #define _LIB_PTHREAD_INT_H
41
42 #include <sa.h>
43 #include <signal.h>
44
45 #define PTHREAD__DEBUG
46
47 #include "pthread_types.h"
48
49
50 struct pthread_st {
51 unsigned int pt_magic;
52
53 int pt_type; /* normal, upcall, or idle */
54 int pt_state; /* running, blocked, etc. */
55 int pt_flags;
56 int pt_spinlocks; /* Number of spinlocks held. */
57
58 /* Entry on the run queue */
59 PTQ_ENTRY(pthread_st) pt_runq;
60 /* Entry on the list of all threads */
61 PTQ_ENTRY(pthread_st) pt_allq;
62 /* Entry on the sleep queue (xxx should be same as run queue?) */
63 PTQ_ENTRY(pthread_st) pt_sleep;
64
65 stack_t pt_stack; /* Our stack */
66 ucontext_t *pt_uc; /* Saved context when we're stopped */
67
68 sigset_t pt_sigmask; /* Signals we won't take. */
69 sigset_t pt_siglist; /* Signals pending for us. */
70 pt_spin_t pt_siglock; /* Lock on above */
71
72 void * pt_exitval; /* Read by pthread_join() */
73
74 /* Other threads trying to pthread_join() us. */
75 struct pt_queue_t pt_joiners;
76 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD,
77 * and for setting the DETACHED flag
78 */
79 pt_spin_t pt_join_lock;
80
81 /* Thread we were going to switch to before we were preempted
82 * ourselves. Will be used by the upcall that's continuing us.
83 */
84 pthread_t pt_switchto;
85 ucontext_t* pt_switchtouc;
86
87 /* Threads that are preempted with spinlocks held will be
88 * continued until they unlock their spinlock. When they do
89 * so, they should jump ship to the thread pointed to by
90 * pt_next.
91 */
92 pthread_t pt_next;
93
94 /* The upcall that is continuing this thread */
95 pthread_t pt_parent;
96
97 /* A queue lock that this thread held while trying to
98 * context switch to another process.
99 */
100 pt_spin_t* pt_heldlock;
101
102 #ifdef PTHREAD__DEBUG
103 int blocks;
104 int preempts;
105 int rescheds;
106 #endif
107 };
108
109
110
111 /* Thread types */
112 #define PT_THREAD_NORMAL 1
113 #define PT_THREAD_UPCALL 2
114 #define PT_THREAD_IDLE 3
115
116 /* Thread states */
117 #define PT_STATE_RUNNABLE 1
118 #define PT_STATE_BLOCKED 2
119 #define PT_STATE_ZOMBIE 3
120 #define PT_STATE_DEAD 4
121 #define PT_STATE_RECYCLABLE 5
122
123 /* Flag values */
124
125 #define PT_FLAG_DETACHED 0x0001
126 #define PT_FLAG_IDLED 0x0002
127
128 #define PT_MAGIC 0xBABCAAAA
129 #define PT_DEAD 0xDEADBEEF
130
131 #define PT_ATTR_MAGIC 0x5555FACE
132 #define PT_ATTR_DEAD 0xFACEDEAD
133
134 #define PT_STACKSIZE (1<<16)
135 #define PT_STACKMASK (PT_STACKSIZE-1)
136
137 #define PT_UPCALLSTACKS 16
138
139 #define IDLESPINS 1000
140
141 /* Utility functions */
142
143 void* pthread__malloc(size_t size);
144 void pthread__free(void *ptr);
145
146 /* Set up/clean up a thread's basic state. */
147 void pthread__initthread(pthread_t t);
148
149 /* Go do something else. Don't go back on the run queue */
150 void pthread__block(pthread_t self, pt_spin_t* queuelock);
151 /* Put a thread back on the run queue */
152 void pthread__sched(pthread_t self, pthread_t thread);
153 void pthread__sched_idle(pthread_t self, pthread_t thread);
154 void pthread__sched_idle2(pthread_t self);
155
156 void pthread__sched_bulk(pthread_t self, pthread_t qhead);
157
158 void pthread__idle(void);
159
160 /* Get the next thread */
161 pthread_t pthread__next(pthread_t self);
162
163 int pthread__stackalloc(pthread_t *t);
164 void pthread__initmain(pthread_t *t);
165
166 void pthread__sa_start(void);
167 void pthread__sa_recycle(pthread_t old, pthread_t new);
168
169 #include "pthread_md.h"
170
171 /* Stack location of pointer to a particular thread */
172 #define pthread__id(sp) \
173 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK))
174
175 #define pthread__self() (pthread__id(pthread__sp()))
176
177 void pthread__upcall_switch(pthread_t self, pthread_t next);
178 void pthread__switch(pthread_t self, pthread_t next, int locks);
179 void pthread__locked_switch(pthread_t self, pthread_t next,
180 pt_spin_t *lock);
181
182 void pthread_lockinit(pt_spin_t *lock);
183 void pthread_spinlock(pthread_t thread, pt_spin_t *lock);
184 int pthread_spintrylock(pthread_t thread, pt_spin_t *lock);
185 void pthread_spinunlock(pthread_t thread, pt_spin_t *lock);
186
187 void pthread__signal(pthread_t t, int sig, int code);
188
189
190
191 #define PTHREADD_CREATE 0
192 #define PTHREADD_IDLE 1
193 #define PTHREADD_UPCALLS 2
194 #define PTHREADD_UP_BLOCK 3
195 #define PTHREADD_UP_NEW 4
196 #define PTHREADD_UP_PREEMPT 5
197 #define PTHREADD_UP_UNBLOCK 6
198 #define PTHREADD_UP_SIGNAL 7
199 #define PTHREADD_SPINLOCKS 8
200 #define PTHREADD_SPINUNLOCKS 9
201 #define PTHREADD_SPINPREEMPT 10
202 #define PTHREADD_RESOLVELOCKS 11
203 #define PTHREADD_SWITCHTO 12
204 #define PTHREADD_NCOUNTERS 13
205
206 #ifdef PTHREAD__DEBUG
207
208 extern int pthread__debug_counters[PTHREADD_NCOUNTERS];
209
210 #define PTHREADD_ADD(x) (pthread__debug_counters[(x)]++)
211
212 #else /* PTHREAD_DEBUG */
213
214 #define PTHREADD_ADD(x)
215
216 #endif /* PTHREAD_DEBUG */
217
218
219
220
221 #endif /* _LIB_PTHREAD_INT_H */
222
223