pthread_int.h revision 1.35
1 /* $NetBSD: pthread_int.h,v 1.35 2006/12/23 05:14:47 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2001,2002,2003 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 #define PTHREAD__DEBUG 43 #define ERRORCHECK 44 45 #include "pthread_types.h" 46 #include "pthread_queue.h" 47 #include "pthread_debug.h" 48 #include "pthread_md.h" 49 50 #ifndef PTHREAD_SA 51 #include <lwp.h> 52 #endif 53 54 #include <sa.h> 55 #include <signal.h> 56 57 #define PTHREAD_KEYS_MAX 256 58 /* 59 * The size of this structure needs to be no larger than struct 60 * __pthread_cleanup_store, defined in pthread.h. 61 */ 62 struct pt_clean_t { 63 PTQ_ENTRY(pt_clean_t) ptc_next; 64 void (*ptc_cleanup)(void *); 65 void *ptc_arg; 66 }; 67 68 struct pt_alarm_t { 69 PTQ_ENTRY(pt_alarm_t) pta_next; 70 pthread_spin_t pta_lock; 71 const struct timespec *pta_time; 72 void (*pta_func)(void *); 73 void *pta_arg; 74 int pta_fired; 75 }; 76 77 /* Private data for pthread_attr_t */ 78 struct pthread_attr_private { 79 char ptap_name[PTHREAD_MAX_NAMELEN_NP]; 80 void *ptap_namearg; 81 void *ptap_stackaddr; 82 size_t ptap_stacksize; 83 size_t ptap_guardsize; 84 }; 85 86 struct __pthread_st { 87 unsigned int pt_magic; 88 /* Identifier, for debugging and for preventing recycling. */ 89 int pt_num; 90 91 #ifdef PTHREAD_SA 92 int pt_type; /* normal, upcall, or idle */ 93 #else 94 lwpid_t pt_lid; /* LWP ID */ 95 #endif 96 int pt_state; /* running, blocked, etc. */ 97 pthread_spin_t pt_statelock; /* lock on pt_state */ 98 int pt_flags; /* see PT_FLAG_* below */ 99 pthread_spin_t pt_flaglock; /* lock on pt_flag */ 100 int pt_cancel; /* Deferred cancellation */ 101 int pt_spinlocks; /* Number of spinlocks held. */ 102 int pt_blockedlwp; /* LWP/SA number when blocked */ 103 int pt_vpid; /* VP number */ 104 int pt_blockgen; /* SA_UPCALL_BLOCKED counter */ 105 int pt_unblockgen; /* SA_UPCALL_UNBLOCKED counter */ 106 107 int pt_errno; /* Thread-specific errno. */ 108 109 /* Entry on the run queue */ 110 PTQ_ENTRY(__pthread_st) pt_runq; 111 /* Entry on the list of all threads */ 112 PTQ_ENTRY(__pthread_st) pt_allq; 113 /* Entry on the sleep queue (xxx should be same as run queue?) */ 114 PTQ_ENTRY(__pthread_st) pt_sleep; 115 /* 116 * Object we're sleeping on. For 1:1 threads (!SA), this is 117 * protected by the interlock on the object that the thread is 118 * sleeping on. 119 */ 120 void *pt_sleepobj; 121 /* Queue we're sleeping on */ 122 struct pthread_queue_t *pt_sleepq; 123 /* Lock protecting that queue */ 124 pthread_spin_t *pt_sleeplock; 125 126 stack_t pt_stack; /* Our stack */ 127 ucontext_t *pt_uc; /* Saved context when we're stopped */ 128 ucontext_t *pt_trapuc; /* Kernel-saved context */ 129 ucontext_t *__pt_blockuc; /* Kernel-saved context when blocked */ 130 131 sigset_t pt_sigmask; /* Signals we won't take. */ 132 sigset_t pt_siglist; /* Signals pending for us. */ 133 sigset_t pt_sigblocked; /* Signals delivered while blocked. */ 134 sigset_t *pt_sigwait; /* Signals waited for in sigwait */ 135 siginfo_t *pt_wsig; 136 pthread_spin_t pt_siglock; /* Lock on above */ 137 138 void * pt_exitval; /* Read by pthread_join() */ 139 140 /* Stack of cancellation cleanup handlers and their arguments */ 141 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 142 143 /* Thread's name, set by the application. */ 144 char* pt_name; 145 146 /* Other threads trying to pthread_join() us. */ 147 struct pthread_queue_t pt_joiners; 148 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 149 * and for setting the DETACHED flag. Also protects pt_name. 150 */ 151 pthread_spin_t pt_join_lock; 152 153 /* Thread we were going to switch to before we were preempted 154 * ourselves. Will be used by the upcall that's continuing us. 155 */ 156 pthread_t pt_switchto; 157 ucontext_t* pt_switchtouc; 158 159 /* Threads that are preempted with spinlocks held will be 160 * continued until they unlock their spinlock. When they do 161 * so, they should jump ship to the thread pointed to by 162 * pt_next. 163 */ 164 pthread_t pt_next; 165 166 /* The upcall that is continuing this thread */ 167 pthread_t pt_parent; 168 169 /* A queue lock that this thread held while trying to 170 * context switch to another process. 171 */ 172 pthread_spin_t* pt_heldlock; 173 174 /* Upcall stack information shared between kernel and 175 * userland. 176 */ 177 struct sa_stackinfo_t pt_stackinfo; 178 179 /* Thread-specific data */ 180 void* pt_specific[PTHREAD_KEYS_MAX]; 181 182 #ifdef PTHREAD__DEBUG 183 int blocks; 184 int preempts; 185 int rescheds; 186 #endif 187 }; 188 189 struct pthread_lock_ops { 190 void (*plo_init)(__cpu_simple_lock_t *); 191 int (*plo_try)(__cpu_simple_lock_t *); 192 void (*plo_unlock)(__cpu_simple_lock_t *); 193 }; 194 195 #ifdef PTHREAD_SA 196 197 /* Thread types */ 198 #define PT_THREAD_NORMAL 1 199 #define PT_THREAD_UPCALL 2 200 #define PT_THREAD_IDLE 3 201 202 /* Thread states */ 203 #define PT_STATE_RUNNING 1 204 #define PT_STATE_RUNNABLE 2 205 #define _PT_STATE_BLOCKED_SYS 3 /* Only used in libpthread_dbg */ 206 #define PT_STATE_BLOCKED_QUEUE 4 207 #define PT_STATE_ZOMBIE 5 208 #define PT_STATE_DEAD 6 209 #define PT_STATE_SUSPENDED 7 210 211 #else /* PTHREAD_SA */ 212 213 /* Thread states */ 214 #define PT_STATE_RUNNING 1 215 #define PT_STATE_ZOMBIE 5 216 #define PT_STATE_DEAD 6 217 218 #endif /* PTHREAD_SA */ 219 220 /* Flag values */ 221 222 #define PT_FLAG_DETACHED 0x0001 223 #define PT_FLAG_IDLED 0x0002 224 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 225 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 226 #define PT_FLAG_CS_PENDING 0x0010 227 #define PT_FLAG_SIGDEFERRED 0x0020 /* There are signals to take */ 228 #define PT_FLAG_SCOPE_SYSTEM 0x0040 229 #define PT_FLAG_EXPLICIT_SCHED 0x0080 230 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 231 #define PT_FLAG_SIGNALED 0x0200 232 233 #define PT_MAGIC 0x11110001 234 #define PT_DEAD 0xDEAD0001 235 236 #define PT_ATTR_MAGIC 0x22220002 237 #define PT_ATTR_DEAD 0xDEAD0002 238 239 #ifdef PT_FIXEDSTACKSIZE_LG 240 241 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 242 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 243 #define PT_STACKMASK (PT_STACKSIZE-1) 244 245 #else /* PT_FIXEDSTACKSIZE_LG */ 246 247 extern int pthread_stacksize_lg; 248 extern size_t pthread_stacksize; 249 extern vaddr_t pthread_stackmask; 250 251 #define PT_STACKSIZE_LG pthread_stacksize_lg 252 #define PT_STACKSIZE pthread_stacksize 253 #define PT_STACKMASK pthread_stackmask 254 255 #endif /* PT_FIXEDSTACKSIZE_LG */ 256 257 258 #define PT_UPCALLSTACKS 16 259 260 #define PT_ALARMTIMER_MAGIC 0x88880010 261 #define PT_RRTIMER_MAGIC 0x88880020 262 #define NIDLETHREADS 4 263 264 /* Flag to be used in a ucontext_t's uc_flags indicating that 265 * the saved register state is "user" state only, not full 266 * trap state. 267 */ 268 #define _UC_USER_BIT 30 269 #define _UC_USER (1LU << _UC_USER_BIT) 270 271 void pthread_init(void) __attribute__ ((__constructor__)); 272 273 /* Utility functions */ 274 275 /* Set up/clean up a thread's basic state. */ 276 void pthread__initthread(pthread_t self, pthread_t t); 277 /* Get offset from stack start to struct sa_stackinfo */ 278 ssize_t pthread__stackinfo_offset(void); 279 280 /* Go do something else. Don't go back on the run queue */ 281 void pthread__block(pthread_t self, pthread_spin_t* queuelock); 282 /* Put a thread back on the suspended queue */ 283 void pthread__suspend(pthread_t self, pthread_t thread); 284 /* Put a thread back on the run queue */ 285 void pthread__sched(pthread_t self, pthread_t thread); 286 void pthread__sched_sleepers(pthread_t self, struct pthread_queue_t *threadq); 287 void pthread__sched_idle(pthread_t self, pthread_t thread); 288 void pthread__sched_idle2(pthread_t self); 289 290 void pthread__sched_bulk(pthread_t self, pthread_t qhead); 291 292 void pthread__idle(void); 293 294 /* Get the next thread */ 295 pthread_t pthread__next(pthread_t self); 296 297 #ifndef PTHREAD_SA 298 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 299 void *obj, struct pthread_queue_t *threadq); 300 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 301 void *obj, pthread_t target); 302 int pthread__park(pthread_t self, pthread_spin_t *lock, 303 void *obj, struct pthread_queue_t *threadq, 304 const struct timespec *abs_timeout, int tail); 305 #endif 306 307 int pthread__stackalloc(pthread_t *t); 308 void pthread__initmain(pthread_t *t); 309 310 void pthread__sa_start(void); 311 void pthread__sa_recycle(pthread_t old, pthread_t new); 312 void pthread__setconcurrency(int); 313 314 /* Alarm code */ 315 void pthread__alarm_init(void); 316 void pthread__alarm_add(pthread_t, struct pt_alarm_t *, 317 const struct timespec *, void (*)(void *), void *); 318 void pthread__alarm_del(pthread_t, struct pt_alarm_t *); 319 int pthread__alarm_fired(struct pt_alarm_t *); 320 void pthread__alarm_process(pthread_t self, void *arg); 321 322 /* Internal locking primitives */ 323 void pthread__lockprim_init(int ncpu); 324 void pthread_lockinit(pthread_spin_t *lock); 325 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 326 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 327 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 328 329 extern const struct pthread_lock_ops *pthread__lock_ops; 330 331 #define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp) 332 #define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp) 333 #define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp) 334 335 #ifndef _getcontext_u 336 int _getcontext_u(ucontext_t *); 337 #endif 338 #ifndef _setcontext_u 339 int _setcontext_u(const ucontext_t *); 340 #endif 341 #ifndef _swapcontext_u 342 int _swapcontext_u(ucontext_t *, const ucontext_t *); 343 #endif 344 345 void pthread__testcancel(pthread_t self); 346 int pthread__find(pthread_t self, pthread_t target); 347 348 #ifndef PTHREAD_MD_INIT 349 #define PTHREAD_MD_INIT 350 #endif 351 352 #ifndef _INITCONTEXT_U_MD 353 #define _INITCONTEXT_U_MD(ucp) 354 #endif 355 356 #define _INITCONTEXT_U(ucp) do { \ 357 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 358 _INITCONTEXT_U_MD(ucp) \ 359 } while (/*CONSTCOND*/0) 360 361 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 362 #define pthread__id(reg) (reg) 363 #else 364 /* Stack location of pointer to a particular thread */ 365 #define pthread__id(sp) \ 366 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 367 368 #define pthread__id_reg() pthread__sp() 369 #endif 370 371 #define pthread__self() (pthread__id(pthread__id_reg())) 372 373 #define pthread__abort() \ 374 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 375 376 #define pthread__assert(e) do { \ 377 if (__predict_false(!(e))) \ 378 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 379 } while (/*CONSTCOND*/0) 380 381 #define pthread__error(err, msg, e) do { \ 382 if (__predict_false(!(e))) { \ 383 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 384 return (err); \ 385 } \ 386 } while (/*CONSTCOND*/0) 387 388 389 390 /* These three routines are defined in processor-specific code. */ 391 void pthread__upcall_switch(pthread_t self, pthread_t next); 392 void pthread__switch(pthread_t self, pthread_t next); 393 void pthread__locked_switch(pthread_t self, pthread_t next, 394 pthread_spin_t *lock); 395 396 void pthread__signal_init(void); 397 void pthread__signal_start(void); 398 399 void pthread__signal(pthread_t self, pthread_t t, siginfo_t *si); 400 void pthread__deliver_signal(pthread_t self, pthread_t t, siginfo_t *si); 401 void pthread__signal_deferred(pthread_t self, pthread_t t); 402 403 void pthread__destroy_tsd(pthread_t self); 404 void pthread__assertfunc(const char *file, int line, const char *function, 405 const char *expr); 406 void pthread__errorfunc(const char *file, int line, const char *function, 407 const char *msg); 408 409 #endif /* _LIB_PTHREAD_INT_H */ 410
Indexes created Mon Sep 22 13:09:51 GMT 2025