pthread_int.h revision 1.1.2.38
1 /* $NetBSD: pthread_int.h,v 1.1.2.38 2003/01/13 18:53:15 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 #include "pthread_queue.h" 50 #include "pthread_debug.h" 51 52 /* 53 * The size of this structure needs to be no larger than struct 54 * __pthread_cleanup_store, defined in pthread.h. 55 */ 56 struct pt_clean_t { 57 PTQ_ENTRY(pt_clean_t) ptc_next; 58 void (*ptc_cleanup)(void *); 59 void *ptc_arg; 60 }; 61 62 struct pt_alarm_t { 63 PTQ_ENTRY(pt_alarm_t) pta_next; 64 pthread_spin_t pta_lock; 65 const struct timespec *pta_time; 66 void (*pta_func)(void *); 67 void *pta_arg; 68 int pta_fired; 69 }; 70 71 struct pthread_st { 72 unsigned int pt_magic; 73 74 int pt_type; /* normal, upcall, or idle */ 75 int pt_state; /* running, blocked, etc. */ 76 pthread_spin_t pt_statelock; /* lock on pt_state */ 77 int pt_flags; /* see PT_FLAG_* below */ 78 int pt_cancel; /* Deferred cancellation */ 79 int pt_spinlocks; /* Number of spinlocks held. */ 80 int pt_blockedlwp; /* LWP/SA number when blocked */ 81 82 int pt_errno; /* Thread-specific errno. */ 83 84 /* Entry on the run queue */ 85 PTQ_ENTRY(pthread_st) pt_runq; 86 /* Entry on the list of all threads */ 87 PTQ_ENTRY(pthread_st) pt_allq; 88 /* Entry on the sleep queue (xxx should be same as run queue?) */ 89 PTQ_ENTRY(pthread_st) pt_sleep; 90 /* Object we're sleeping on */ 91 void *pt_sleepobj; 92 /* Queue we're sleeping on */ 93 struct pthread_queue_t *pt_sleepq; 94 /* Lock protecting that queue */ 95 pthread_spin_t *pt_sleeplock; 96 97 stack_t pt_stack; /* Our stack */ 98 ucontext_t *pt_uc; /* Saved context when we're stopped */ 99 100 sigset_t pt_sigmask; /* Signals we won't take. */ 101 sigset_t pt_siglist; /* Signals pending for us. */ 102 pthread_spin_t pt_siglock; /* Lock on above */ 103 104 void * pt_exitval; /* Read by pthread_join() */ 105 106 /* Stack of cancellation cleanup handlers and their arguments */ 107 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 108 109 /* Other threads trying to pthread_join() us. */ 110 struct pthread_queue_t pt_joiners; 111 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 112 * and for setting the DETACHED flag 113 */ 114 pthread_spin_t pt_join_lock; 115 116 /* Thread we were going to switch to before we were preempted 117 * ourselves. Will be used by the upcall that's continuing us. 118 */ 119 pthread_t pt_switchto; 120 ucontext_t* pt_switchtouc; 121 122 /* The context we saved in pthread__locked_switch but which 123 * was trashed when we were preempted before switching stacks. 124 */ 125 ucontext_t* pt_sleepuc; 126 127 /* Threads that are preempted with spinlocks held will be 128 * continued until they unlock their spinlock. When they do 129 * so, they should jump ship to the thread pointed to by 130 * pt_next. 131 */ 132 pthread_t pt_next; 133 134 /* The upcall that is continuing this thread */ 135 pthread_t pt_parent; 136 137 /* A queue lock that this thread held while trying to 138 * context switch to another process. 139 */ 140 pthread_spin_t* pt_heldlock; 141 142 /* Identifier, for debugging. */ 143 int pt_num; 144 145 /* Thread-specific data */ 146 void* pt_specific[PTHREAD_KEYS_MAX]; 147 148 #ifdef PTHREAD__DEBUG 149 int blocks; 150 int preempts; 151 int rescheds; 152 #endif 153 }; 154 155 struct pthread_lock_ops { 156 void (*plo_init)(__cpu_simple_lock_t *); 157 int (*plo_try)(__cpu_simple_lock_t *); 158 void (*plo_unlock)(__cpu_simple_lock_t *); 159 }; 160 161 /* Thread types */ 162 #define PT_THREAD_NORMAL 1 163 #define PT_THREAD_UPCALL 2 164 #define PT_THREAD_IDLE 3 165 166 /* Thread states */ 167 #define PT_STATE_RUNNING 1 168 #define PT_STATE_RUNNABLE 2 169 #define PT_STATE_BLOCKED_SYS 3 170 #define PT_STATE_BLOCKED_QUEUE 4 171 #define PT_STATE_ZOMBIE 5 172 #define PT_STATE_DEAD 6 173 #define PT_STATE_RECYCLABLE 7 174 175 /* Flag values */ 176 177 #define PT_FLAG_DETACHED 0x0001 178 #define PT_FLAG_IDLED 0x0002 179 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 180 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 181 #define PT_FLAG_CS_PENDING 0x0010 182 #define PT_FLAG_SIGCATCH 0x0020 /* Interrupt sleep on a signal */ 183 184 #define PT_MAGIC 0x11110001 185 #define PT_DEAD 0xDEAD0001 186 187 #define PT_ATTR_MAGIC 0x22220002 188 #define PT_ATTR_DEAD 0xDEAD0002 189 190 #define PT_STACKSIZE (1<<18) 191 #define PT_STACKMASK (PT_STACKSIZE-1) 192 193 #define PT_UPCALLSTACKS 16 194 195 #define PT_ALARMTIMER_MAGIC 0x88880010 196 #define PT_RRTIMER_MAGIC 0x88880020 197 #define NIDLETHREADS 4 198 #define IDLESPINS 1000 199 200 /* Flag to be used in a ucontext_t's uc_flags indicating that 201 * the saved register state is "user" state only, not full 202 * trap state. 203 */ 204 #define _UC_USER_BIT 30 205 #define _UC_USER (1LU << _UC_USER_BIT) 206 207 void pthread_init(void) __attribute__ ((__constructor__)); 208 209 /* Utility functions */ 210 211 /* Set up/clean up a thread's basic state. */ 212 void pthread__initthread(pthread_t self, pthread_t t); 213 214 /* Go do something else. Don't go back on the run queue */ 215 void pthread__block(pthread_t self, pthread_spin_t* queuelock); 216 /* Put a thread back on the run queue */ 217 void pthread__sched(pthread_t self, pthread_t thread); 218 void pthread__sched_idle(pthread_t self, pthread_t thread); 219 void pthread__sched_idle2(pthread_t self); 220 221 void pthread__sched_bulk(pthread_t self, pthread_t qhead); 222 223 void pthread__idle(void); 224 225 /* Get the next thread */ 226 pthread_t pthread__next(pthread_t self); 227 228 int pthread__stackalloc(pthread_t *t); 229 void pthread__initmain(pthread_t *t); 230 231 void pthread__sa_start(void); 232 void pthread__sa_recycle(pthread_t old, pthread_t new); 233 234 /* Alarm code */ 235 void pthread__alarm_init(void); 236 void pthread__alarm_add(pthread_t, struct pt_alarm_t *, 237 const struct timespec *, void (*)(void *), void *); 238 void pthread__alarm_del(pthread_t, struct pt_alarm_t *); 239 int pthread__alarm_fired(struct pt_alarm_t *); 240 void pthread__alarm_process(pthread_t self, void *arg); 241 242 /* Internal locking primitives */ 243 void pthread__lockprim_init(void); 244 void pthread_lockinit(pthread_spin_t *lock); 245 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 246 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 247 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 248 249 extern const struct pthread_lock_ops *pthread__lock_ops; 250 251 #define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp) 252 #define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp) 253 #define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp) 254 255 int _getcontext_u(ucontext_t *); 256 int _setcontext_u(const ucontext_t *); 257 int _swapcontext_u(ucontext_t *, const ucontext_t *); 258 259 void pthread__testcancel(pthread_t self); 260 int pthread__find(pthread_t self, pthread_t target); 261 262 #include "pthread_md.h" 263 264 #ifndef PTHREAD_MD_INIT 265 #define PTHREAD_MD_INIT 266 #endif 267 268 #ifndef _INITCONTEXT_U_MD 269 #define _INITCONTEXT_U_MD(ucp) 270 #endif 271 272 #define _INITCONTEXT_U(ucp) do { \ 273 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 274 _INITCONTEXT_U_MD(ucp) \ 275 } while (0) 276 277 /* Stack location of pointer to a particular thread */ 278 #define pthread__id(sp) \ 279 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 280 281 #define pthread__self() (pthread__id(pthread__sp())) 282 283 /* These three routines are defined in processor-specific code. */ 284 void pthread__upcall_switch(pthread_t self, pthread_t next); 285 void pthread__switch(pthread_t self, pthread_t next); 286 void pthread__locked_switch(pthread_t self, pthread_t next, 287 pthread_spin_t *lock); 288 289 void pthread__signal_init(void); 290 291 void pthread__signal(pthread_t t, int sig, int code); 292 293 void pthread__destroy_tsd(pthread_t self); 294 295 296 #endif /* _LIB_PTHREAD_INT_H */ 297
Indexes created Mon Sep 22 13:09:51 GMT 2025