pthread_int.h revision 1.36
1 /* $NetBSD: pthread_int.h,v 1.36 2006/12/24 18:39:46 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 #ifdef PTHREAD_SA 106 int pt_unblockgen; /* SA_UPCALL_UNBLOCKED counter */ 107 #else 108 int pt_sleeponq; /* on a sleep queue */ 109 #endif 110 111 int pt_errno; /* Thread-specific errno. */ 112 113 /* Entry on the run queue */ 114 PTQ_ENTRY(__pthread_st) pt_runq; 115 /* Entry on the list of all threads */ 116 PTQ_ENTRY(__pthread_st) pt_allq; 117 /* Entry on the sleep queue (xxx should be same as run queue?) */ 118 PTQ_ENTRY(__pthread_st) pt_sleep; 119 /* 120 * Object we're sleeping on. For 1:1 threads (!SA), this is 121 * protected by the interlock on the object that the thread is 122 * sleeping on. 123 */ 124 void *pt_sleepobj; 125 /* Queue we're sleeping on */ 126 struct pthread_queue_t *pt_sleepq; 127 /* Lock protecting that queue */ 128 pthread_spin_t *pt_sleeplock; 129 130 stack_t pt_stack; /* Our stack */ 131 ucontext_t *pt_uc; /* Saved context when we're stopped */ 132 ucontext_t *pt_trapuc; /* Kernel-saved context */ 133 ucontext_t *__pt_blockuc; /* Kernel-saved context when blocked */ 134 135 sigset_t pt_sigmask; /* Signals we won't take. */ 136 sigset_t pt_siglist; /* Signals pending for us. */ 137 sigset_t pt_sigblocked; /* Signals delivered while blocked. */ 138 sigset_t *pt_sigwait; /* Signals waited for in sigwait */ 139 siginfo_t *pt_wsig; 140 pthread_spin_t pt_siglock; /* Lock on above */ 141 142 void * pt_exitval; /* Read by pthread_join() */ 143 144 /* Stack of cancellation cleanup handlers and their arguments */ 145 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 146 147 /* Thread's name, set by the application. */ 148 char* pt_name; 149 150 /* Other threads trying to pthread_join() us. */ 151 struct pthread_queue_t pt_joiners; 152 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 153 * and for setting the DETACHED flag. Also protects pt_name. 154 */ 155 pthread_spin_t pt_join_lock; 156 157 /* Thread we were going to switch to before we were preempted 158 * ourselves. Will be used by the upcall that's continuing us. 159 */ 160 pthread_t pt_switchto; 161 ucontext_t* pt_switchtouc; 162 163 /* Threads that are preempted with spinlocks held will be 164 * continued until they unlock their spinlock. When they do 165 * so, they should jump ship to the thread pointed to by 166 * pt_next. 167 */ 168 pthread_t pt_next; 169 170 /* The upcall that is continuing this thread */ 171 pthread_t pt_parent; 172 173 /* A queue lock that this thread held while trying to 174 * context switch to another process. 175 */ 176 pthread_spin_t* pt_heldlock; 177 178 /* Upcall stack information shared between kernel and 179 * userland. 180 */ 181 struct sa_stackinfo_t pt_stackinfo; 182 183 /* Thread-specific data */ 184 void* pt_specific[PTHREAD_KEYS_MAX]; 185 186 #ifdef PTHREAD__DEBUG 187 int blocks; 188 int preempts; 189 int rescheds; 190 #endif 191 }; 192 193 struct pthread_lock_ops { 194 void (*plo_init)(__cpu_simple_lock_t *); 195 int (*plo_try)(__cpu_simple_lock_t *); 196 void (*plo_unlock)(__cpu_simple_lock_t *); 197 }; 198 199 #ifdef PTHREAD_SA 200 201 /* Thread types */ 202 #define PT_THREAD_NORMAL 1 203 #define PT_THREAD_UPCALL 2 204 #define PT_THREAD_IDLE 3 205 206 /* Thread states */ 207 #define PT_STATE_RUNNING 1 208 #define PT_STATE_RUNNABLE 2 209 #define _PT_STATE_BLOCKED_SYS 3 /* Only used in libpthread_dbg */ 210 #define PT_STATE_BLOCKED_QUEUE 4 211 #define PT_STATE_ZOMBIE 5 212 #define PT_STATE_DEAD 6 213 #define PT_STATE_SUSPENDED 7 214 215 #else /* PTHREAD_SA */ 216 217 /* Thread states */ 218 #define PT_STATE_RUNNING 1 219 #define PT_STATE_ZOMBIE 5 220 #define PT_STATE_DEAD 6 221 222 #endif /* PTHREAD_SA */ 223 224 /* Flag values */ 225 226 #define PT_FLAG_DETACHED 0x0001 227 #define PT_FLAG_IDLED 0x0002 228 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 229 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 230 #define PT_FLAG_CS_PENDING 0x0010 231 #define PT_FLAG_SIGDEFERRED 0x0020 /* There are signals to take */ 232 #define PT_FLAG_SCOPE_SYSTEM 0x0040 233 #define PT_FLAG_EXPLICIT_SCHED 0x0080 234 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 235 #define PT_FLAG_SIGNALED 0x0200 236 237 #define PT_MAGIC 0x11110001 238 #define PT_DEAD 0xDEAD0001 239 240 #define PT_ATTR_MAGIC 0x22220002 241 #define PT_ATTR_DEAD 0xDEAD0002 242 243 #ifdef PT_FIXEDSTACKSIZE_LG 244 245 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 246 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 247 #define PT_STACKMASK (PT_STACKSIZE-1) 248 249 #else /* PT_FIXEDSTACKSIZE_LG */ 250 251 extern int pthread_stacksize_lg; 252 extern size_t pthread_stacksize; 253 extern vaddr_t pthread_stackmask; 254 255 #define PT_STACKSIZE_LG pthread_stacksize_lg 256 #define PT_STACKSIZE pthread_stacksize 257 #define PT_STACKMASK pthread_stackmask 258 259 #endif /* PT_FIXEDSTACKSIZE_LG */ 260 261 262 #define PT_UPCALLSTACKS 16 263 264 #define PT_ALARMTIMER_MAGIC 0x88880010 265 #define PT_RRTIMER_MAGIC 0x88880020 266 #define NIDLETHREADS 4 267 268 /* Flag to be used in a ucontext_t's uc_flags indicating that 269 * the saved register state is "user" state only, not full 270 * trap state. 271 */ 272 #define _UC_USER_BIT 30 273 #define _UC_USER (1LU << _UC_USER_BIT) 274 275 void pthread_init(void) __attribute__ ((__constructor__)); 276 277 /* Utility functions */ 278 279 /* Set up/clean up a thread's basic state. */ 280 void pthread__initthread(pthread_t self, pthread_t t); 281 /* Get offset from stack start to struct sa_stackinfo */ 282 ssize_t pthread__stackinfo_offset(void); 283 284 /* Go do something else. Don't go back on the run queue */ 285 void pthread__block(pthread_t self, pthread_spin_t* queuelock); 286 /* Put a thread back on the suspended queue */ 287 void pthread__suspend(pthread_t self, pthread_t thread); 288 /* Put a thread back on the run queue */ 289 void pthread__sched(pthread_t self, pthread_t thread); 290 void pthread__sched_sleepers(pthread_t self, struct pthread_queue_t *threadq); 291 void pthread__sched_idle(pthread_t self, pthread_t thread); 292 void pthread__sched_idle2(pthread_t self); 293 294 void pthread__sched_bulk(pthread_t self, pthread_t qhead); 295 296 void pthread__idle(void); 297 298 /* Get the next thread */ 299 pthread_t pthread__next(pthread_t self); 300 301 #ifndef PTHREAD_SA 302 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 303 void *obj, struct pthread_queue_t *threadq); 304 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 305 void *obj, pthread_t target); 306 int pthread__park(pthread_t self, pthread_spin_t *lock, 307 void *obj, struct pthread_queue_t *threadq, 308 const struct timespec *abs_timeout, int tail, 309 int cancelpt); 310 #endif 311 312 int pthread__stackalloc(pthread_t *t); 313 void pthread__initmain(pthread_t *t); 314 315 void pthread__sa_start(void); 316 void pthread__sa_recycle(pthread_t old, pthread_t new); 317 void pthread__setconcurrency(int); 318 319 /* Alarm code */ 320 void pthread__alarm_init(void); 321 void pthread__alarm_add(pthread_t, struct pt_alarm_t *, 322 const struct timespec *, void (*)(void *), void *); 323 void pthread__alarm_del(pthread_t, struct pt_alarm_t *); 324 int pthread__alarm_fired(struct pt_alarm_t *); 325 void pthread__alarm_process(pthread_t self, void *arg); 326 327 /* Internal locking primitives */ 328 void pthread__lockprim_init(int ncpu); 329 void pthread_lockinit(pthread_spin_t *lock); 330 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 331 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 332 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 333 334 extern const struct pthread_lock_ops *pthread__lock_ops; 335 336 #define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp) 337 #define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp) 338 #define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp) 339 340 #ifndef _getcontext_u 341 int _getcontext_u(ucontext_t *); 342 #endif 343 #ifndef _setcontext_u 344 int _setcontext_u(const ucontext_t *); 345 #endif 346 #ifndef _swapcontext_u 347 int _swapcontext_u(ucontext_t *, const ucontext_t *); 348 #endif 349 350 void pthread__testcancel(pthread_t self); 351 int pthread__find(pthread_t self, pthread_t target); 352 353 #ifndef PTHREAD_MD_INIT 354 #define PTHREAD_MD_INIT 355 #endif 356 357 #ifndef _INITCONTEXT_U_MD 358 #define _INITCONTEXT_U_MD(ucp) 359 #endif 360 361 #define _INITCONTEXT_U(ucp) do { \ 362 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 363 _INITCONTEXT_U_MD(ucp) \ 364 } while (/*CONSTCOND*/0) 365 366 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 367 #define pthread__id(reg) (reg) 368 #else 369 /* Stack location of pointer to a particular thread */ 370 #define pthread__id(sp) \ 371 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 372 373 #define pthread__id_reg() pthread__sp() 374 #endif 375 376 #define pthread__self() (pthread__id(pthread__id_reg())) 377 378 #define pthread__abort() \ 379 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 380 381 #define pthread__assert(e) do { \ 382 if (__predict_false(!(e))) \ 383 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 384 } while (/*CONSTCOND*/0) 385 386 #define pthread__error(err, msg, e) do { \ 387 if (__predict_false(!(e))) { \ 388 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 389 return (err); \ 390 } \ 391 } while (/*CONSTCOND*/0) 392 393 394 395 /* These three routines are defined in processor-specific code. */ 396 void pthread__upcall_switch(pthread_t self, pthread_t next); 397 void pthread__switch(pthread_t self, pthread_t next); 398 void pthread__locked_switch(pthread_t self, pthread_t next, 399 pthread_spin_t *lock); 400 401 void pthread__signal_init(void); 402 void pthread__signal_start(void); 403 404 void pthread__signal(pthread_t self, pthread_t t, siginfo_t *si); 405 void pthread__deliver_signal(pthread_t self, pthread_t t, siginfo_t *si); 406 void pthread__signal_deferred(pthread_t self, pthread_t t); 407 408 void pthread__destroy_tsd(pthread_t self); 409 void pthread__assertfunc(const char *file, int line, const char *function, 410 const char *expr); 411 void pthread__errorfunc(const char *file, int line, const char *function, 412 const char *msg); 413 414 #endif /* _LIB_PTHREAD_INT_H */ 415
Indexes created Tue Sep 23 01:09:51 GMT 2025