pthread_int.h revision 1.1.2.16
1 /* $NetBSD: pthread_int.h,v 1.1.2.16 2001/09/04 21:19:23 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 #define ERRORCHECK 47 48 #include "pthread_types.h" 49 50 51 struct pthread_st { 52 unsigned int pt_magic; 53 54 int pt_type; /* normal, upcall, or idle */ 55 int pt_state; /* running, blocked, etc. */ 56 int pt_flags; 57 int pt_spinlocks; /* Number of spinlocks held. */ 58 59 /* Entry on the run queue */ 60 PTQ_ENTRY(pthread_st) pt_runq; 61 /* Entry on the list of all threads */ 62 PTQ_ENTRY(pthread_st) pt_allq; 63 /* Entry on the sleep queue (xxx should be same as run queue?) */ 64 PTQ_ENTRY(pthread_st) pt_sleep; 65 66 stack_t pt_stack; /* Our stack */ 67 ucontext_t *pt_uc; /* Saved context when we're stopped */ 68 69 sigset_t pt_sigmask; /* Signals we won't take. */ 70 sigset_t pt_siglist; /* Signals pending for us. */ 71 pt_spin_t pt_siglock; /* Lock on above */ 72 73 void * pt_exitval; /* Read by pthread_join() */ 74 75 /* Other threads trying to pthread_join() us. */ 76 struct pt_queue_t pt_joiners; 77 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 78 * and for setting the DETACHED flag 79 */ 80 pt_spin_t pt_join_lock; 81 82 /* Thread we were going to switch to before we were preempted 83 * ourselves. Will be used by the upcall that's continuing us. 84 */ 85 pthread_t pt_switchto; 86 ucontext_t* pt_switchtouc; 87 88 /* The context we saved in pthread__locked_switch but which 89 * was trashed when we were preempted before switching stacks. 90 */ 91 ucontext_t* pt_sleepuc; 92 93 /* Threads that are preempted with spinlocks held will be 94 * continued until they unlock their spinlock. When they do 95 * so, they should jump ship to the thread pointed to by 96 * pt_next. 97 */ 98 pthread_t pt_next; 99 100 /* The upcall that is continuing this thread */ 101 pthread_t pt_parent; 102 103 /* A queue lock that this thread held while trying to 104 * context switch to another process. 105 */ 106 pt_spin_t* pt_heldlock; 107 108 /* Thread-specific data */ 109 void* pt_specific[PTHREAD_KEYS_MAX]; 110 111 #ifdef PTHREAD__DEBUG 112 int blocks; 113 int preempts; 114 int rescheds; 115 #endif 116 }; 117 118 119 120 /* Thread types */ 121 #define PT_THREAD_NORMAL 1 122 #define PT_THREAD_UPCALL 2 123 #define PT_THREAD_IDLE 3 124 125 /* Thread states */ 126 #define PT_STATE_RUNNABLE 1 127 #define PT_STATE_BLOCKED 2 128 #define PT_STATE_ZOMBIE 3 129 #define PT_STATE_DEAD 4 130 #define PT_STATE_RECYCLABLE 5 131 132 /* Flag values */ 133 134 #define PT_FLAG_DETACHED 0x0001 135 #define PT_FLAG_IDLED 0x0002 136 137 #define PT_MAGIC 0x11110001 138 #define PT_DEAD 0xDEAD0001 139 140 #define PT_ATTR_MAGIC 0x22220002 141 #define PT_ATTR_DEAD 0xDEAD0002 142 143 #define PT_STACKSIZE (1<<16) 144 #define PT_STACKMASK (PT_STACKSIZE-1) 145 146 #define PT_UPCALLSTACKS 16 147 148 #define NIDLETHREADS 4 149 #define IDLESPINS 1000 150 151 /* Flag to be used in a ucontext_t's uc_flags indicating that 152 * the saved register state is "user" state only, not full 153 * trap state. 154 */ 155 #define _UC_USER_BIT 30 156 #define _UC_USER (1LU << _UC_USER_BIT) 157 158 void pthread_init(void) __attribute__ ((__constructor__)); 159 160 /* Utility functions */ 161 162 /* Set up/clean up a thread's basic state. */ 163 void pthread__initthread(pthread_t t); 164 165 /* Go do something else. Don't go back on the run queue */ 166 void pthread__block(pthread_t self, pt_spin_t* queuelock); 167 /* Put a thread back on the run queue */ 168 void pthread__sched(pthread_t self, pthread_t thread); 169 void pthread__sched_idle(pthread_t self, pthread_t thread); 170 void pthread__sched_idle2(pthread_t self); 171 172 void pthread__sched_bulk(pthread_t self, pthread_t qhead); 173 174 void pthread__idle(void); 175 176 /* Get the next thread */ 177 pthread_t pthread__next(pthread_t self); 178 179 int pthread__stackalloc(pthread_t *t); 180 void pthread__initmain(pthread_t *t); 181 182 void pthread__sa_start(void); 183 void pthread__sa_recycle(pthread_t old, pthread_t new); 184 185 #include "pthread_md.h" 186 187 int _getcontext_u(ucontext_t *); 188 int _setcontext_u(const ucontext_t *); 189 int _swapcontext_u(ucontext_t *, const ucontext_t *); 190 191 /* Stack location of pointer to a particular thread */ 192 #define pthread__id(sp) \ 193 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 194 195 #define pthread__self() (pthread__id(pthread__sp())) 196 197 /* These three routines are defined in processor-specific code. */ 198 void pthread__upcall_switch(pthread_t self, pthread_t next); 199 void pthread__switch(pthread_t self, pthread_t next); 200 void pthread__locked_switch(pthread_t self, pthread_t next, 201 pt_spin_t *lock); 202 203 204 void pthread__signal(pthread_t t, int sig, int code); 205 206 void pthread__destroy_tsd(pthread_t self); 207 208 209 #define PTHREADD_CREATE 0 210 #define PTHREADD_IDLE 1 211 #define PTHREADD_UPCALLS 2 212 #define PTHREADD_UP_BLOCK 3 213 #define PTHREADD_UP_NEW 4 214 #define PTHREADD_UP_PREEMPT 5 215 #define PTHREADD_UP_UNBLOCK 6 216 #define PTHREADD_UP_SIGNAL 7 217 #define PTHREADD_SPINLOCKS 8 218 #define PTHREADD_SPINUNLOCKS 9 219 #define PTHREADD_SPINPREEMPT 10 220 #define PTHREADD_RESOLVELOCKS 11 221 #define PTHREADD_SWITCHTO 12 222 #define PTHREADD_NCOUNTERS 13 223 224 #ifdef PTHREAD__DEBUG 225 226 #define PTHREAD__DEBUG_SHMKEY (0x000f) 227 #define PTHREAD__DEBUG_SHMSIZE (1<<18) 228 229 extern int pthread__debug_counters[PTHREADD_NCOUNTERS]; 230 231 #define PTHREADD_ADD(x) (pthread__debug_counters[(x)]++) 232 233 #define DPRINTF(x) pthread__debuglog_printf x 234 235 struct pthread_msgbuf { 236 #define BUF_MAGIC 0x090976 237 int msg_magic; 238 long msg_bufw; 239 long msg_bufr; 240 long msg_bufs; 241 char msg_bufc[1]; 242 }; 243 244 void pthread__debug_init(void); 245 struct pthread_msgbuf* pthread__debuglog_init(int force); 246 void pthread__debuglog_printf(const char *fmt, ...); 247 248 #else /* PTHREAD_DEBUG */ 249 250 #define PTHREADD_ADD(x) 251 #define DPRINTF(x) 252 253 #endif /* PTHREAD_DEBUG */ 254 255 #endif /* _LIB_PTHREAD_INT_H */ 256 257
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