Annotation of src/lib/libpthread/pthread_int.h, Revision 1.1.2.5
1.1.2.5 ! nathanw 1: /* $NetBSD: pthread_int.h,v 1.1.2.4 2001/07/13 02:42:38 nathanw Exp $ */
1.1.2.4 nathanw 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: */
1.1.2.1 nathanw 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:
1.1.2.2 nathanw 47: #include "pthread_types.h"
1.1.2.1 nathanw 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 */
1.1.2.2 nathanw 59: PTQ_ENTRY(pthread_st) pt_runq;
1.1.2.1 nathanw 60: /* Entry on the list of all threads */
1.1.2.2 nathanw 61: PTQ_ENTRY(pthread_st) pt_allq;
1.1.2.1 nathanw 62: /* Entry on the sleep queue (xxx should be same as run queue?) */
1.1.2.2 nathanw 63: PTQ_ENTRY(pthread_st) pt_sleep;
1.1.2.1 nathanw 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
1.1.2.2 nathanw 129: #define PT_DEAD 0xDEADBEEF
130:
1.1.2.1 nathanw 131: #define PT_ATTR_MAGIC 0x5555FACE
132: #define PT_ATTR_DEAD 0xFACEDEAD
133:
1.1.2.3 nathanw 134: #define PT_STACKSIZE (1<<16)
1.1.2.1 nathanw 135: #define PT_STACKMASK (PT_STACKSIZE-1)
136:
137: #define PT_UPCALLSTACKS 16
138:
1.1.2.5 ! nathanw 139: #define NIDLETHREADS 4
1.1.2.1 nathanw 140: #define IDLESPINS 1000
141:
142: /* Utility functions */
143:
144: void* pthread__malloc(size_t size);
145: void pthread__free(void *ptr);
146:
147: /* Set up/clean up a thread's basic state. */
148: void pthread__initthread(pthread_t t);
149:
150: /* Go do something else. Don't go back on the run queue */
151: void pthread__block(pthread_t self, pt_spin_t* queuelock);
152: /* Put a thread back on the run queue */
153: void pthread__sched(pthread_t self, pthread_t thread);
154: void pthread__sched_idle(pthread_t self, pthread_t thread);
155: void pthread__sched_idle2(pthread_t self);
156:
157: void pthread__sched_bulk(pthread_t self, pthread_t qhead);
158:
159: void pthread__idle(void);
160:
161: /* Get the next thread */
162: pthread_t pthread__next(pthread_t self);
163:
164: int pthread__stackalloc(pthread_t *t);
165: void pthread__initmain(pthread_t *t);
166:
167: void pthread__sa_start(void);
168: void pthread__sa_recycle(pthread_t old, pthread_t new);
169:
170: #include "pthread_md.h"
171:
172: /* Stack location of pointer to a particular thread */
173: #define pthread__id(sp) \
174: ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK))
175:
176: #define pthread__self() (pthread__id(pthread__sp()))
177:
178: void pthread__upcall_switch(pthread_t self, pthread_t next);
179: void pthread__switch(pthread_t self, pthread_t next, int locks);
180: void pthread__locked_switch(pthread_t self, pthread_t next,
181: pt_spin_t *lock);
182:
1.1.2.2 nathanw 183: void pthread_lockinit(pt_spin_t *lock);
1.1.2.1 nathanw 184: void pthread_spinlock(pthread_t thread, pt_spin_t *lock);
185: int pthread_spintrylock(pthread_t thread, pt_spin_t *lock);
186: void pthread_spinunlock(pthread_t thread, pt_spin_t *lock);
187:
188: void pthread__signal(pthread_t t, int sig, int code);
189:
190:
191:
192: #define PTHREADD_CREATE 0
193: #define PTHREADD_IDLE 1
194: #define PTHREADD_UPCALLS 2
195: #define PTHREADD_UP_BLOCK 3
196: #define PTHREADD_UP_NEW 4
197: #define PTHREADD_UP_PREEMPT 5
198: #define PTHREADD_UP_UNBLOCK 6
199: #define PTHREADD_UP_SIGNAL 7
200: #define PTHREADD_SPINLOCKS 8
201: #define PTHREADD_SPINUNLOCKS 9
202: #define PTHREADD_SPINPREEMPT 10
203: #define PTHREADD_RESOLVELOCKS 11
204: #define PTHREADD_SWITCHTO 12
205: #define PTHREADD_NCOUNTERS 13
206:
207: #ifdef PTHREAD__DEBUG
208:
209: extern int pthread__debug_counters[PTHREADD_NCOUNTERS];
210:
211: #define PTHREADD_ADD(x) (pthread__debug_counters[(x)]++)
212:
213: #else /* PTHREAD_DEBUG */
214:
215: #define PTHREADD_ADD(x)
216:
217: #endif /* PTHREAD_DEBUG */
218:
219:
220:
221:
222: #endif /* _LIB_PTHREAD_INT_H */
223:
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