pthread_int.h revision 1.40
1 /* $NetBSD: pthread_int.h,v 1.40 2007/03/20 23:33:10 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2002, 2003, 2006, 2007 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 and Andrew Doran. 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 #include <lwp.h> 51 #include <signal.h> 52 53 #define PTHREAD_KEYS_MAX 256 54 /* 55 * The size of this structure needs to be no larger than struct 56 * __pthread_cleanup_store, defined in pthread.h. 57 */ 58 struct pt_clean_t { 59 PTQ_ENTRY(pt_clean_t) ptc_next; 60 void (*ptc_cleanup)(void *); 61 void *ptc_arg; 62 }; 63 64 /* Private data for pthread_attr_t */ 65 struct pthread_attr_private { 66 char ptap_name[PTHREAD_MAX_NAMELEN_NP]; 67 void *ptap_namearg; 68 void *ptap_stackaddr; 69 size_t ptap_stacksize; 70 size_t ptap_guardsize; 71 }; 72 73 struct __pthread_st { 74 unsigned int pt_magic; 75 /* Identifier, for debugging and for preventing recycling. */ 76 int pt_num; 77 78 lwpid_t pt_lid; /* LWP ID */ 79 int pt_state; /* running, blocked, etc. */ 80 pthread_spin_t pt_statelock; /* lock on pt_state */ 81 int pt_flags; /* see PT_FLAG_* below */ 82 pthread_spin_t pt_flaglock; /* lock on pt_flag */ 83 int pt_cancel; /* Deferred cancellation */ 84 int pt_spinlocks; /* Number of spinlocks held. */ 85 void *pt_mutexhint; /* Last mutex held. */ 86 int pt_sleeponq; /* on a sleep queue */ 87 int pt_errno; /* Thread-specific errno. */ 88 89 /* Entry on the list of all threads */ 90 PTQ_ENTRY(__pthread_st) pt_allq; 91 /* Entry on the sleep queue (xxx should be same as run queue?) */ 92 PTQ_ENTRY(__pthread_st) pt_sleep; 93 /* 94 * Object we're sleeping on. For 1:1 threads (!SA), this is 95 * protected by the interlock on the object that the thread is 96 * sleeping on. 97 */ 98 void *pt_sleepobj; 99 /* Queue we're sleeping on */ 100 struct pthread_queue_t *pt_sleepq; 101 102 stack_t pt_stack; /* Our stack */ 103 ucontext_t *pt_uc; /* Saved context when we're stopped */ 104 void *pt_exitval; /* Read by pthread_join() */ 105 char *pt_name; /* Thread's name, set by the app. */ 106 107 /* Stack of cancellation cleanup handlers and their arguments */ 108 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 109 110 /* Other threads trying to pthread_join() us. */ 111 struct pthread_queue_t pt_joiners; 112 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 113 * and for setting the DETACHED flag. Also protects pt_name. 114 */ 115 pthread_spin_t pt_join_lock; 116 117 /* Thread-specific data */ 118 void* pt_specific[PTHREAD_KEYS_MAX]; 119 }; 120 121 struct pthread_lock_ops { 122 void (*plo_init)(__cpu_simple_lock_t *); 123 int (*plo_try)(__cpu_simple_lock_t *); 124 void (*plo_unlock)(__cpu_simple_lock_t *); 125 }; 126 127 /* Thread states */ 128 #define PT_STATE_RUNNING 1 129 #define PT_STATE_ZOMBIE 5 130 #define PT_STATE_DEAD 6 131 132 /* Flag values */ 133 134 #define PT_FLAG_DETACHED 0x0001 135 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 136 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 137 #define PT_FLAG_CS_PENDING 0x0010 138 #define PT_FLAG_SCOPE_SYSTEM 0x0040 139 #define PT_FLAG_EXPLICIT_SCHED 0x0080 140 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 141 142 #define PT_MAGIC 0x11110001 143 #define PT_DEAD 0xDEAD0001 144 145 #define PT_ATTR_MAGIC 0x22220002 146 #define PT_ATTR_DEAD 0xDEAD0002 147 148 #ifdef PT_FIXEDSTACKSIZE_LG 149 150 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 151 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 152 #define PT_STACKMASK (PT_STACKSIZE-1) 153 154 #else /* PT_FIXEDSTACKSIZE_LG */ 155 156 extern int pthread_stacksize_lg; 157 extern size_t pthread_stacksize; 158 extern vaddr_t pthread_stackmask; 159 160 #define PT_STACKSIZE_LG pthread_stacksize_lg 161 #define PT_STACKSIZE pthread_stacksize 162 #define PT_STACKMASK pthread_stackmask 163 164 #endif /* PT_FIXEDSTACKSIZE_LG */ 165 166 /* Flag to be used in a ucontext_t's uc_flags indicating that 167 * the saved register state is "user" state only, not full 168 * trap state. 169 */ 170 #define _UC_USER_BIT 30 171 #define _UC_USER (1LU << _UC_USER_BIT) 172 173 void pthread_init(void) __attribute__ ((__constructor__)); 174 175 /* Utility functions */ 176 177 /* Set up/clean up a thread's basic state. */ 178 void pthread__initthread(pthread_t self, pthread_t t); 179 /* Get offset from stack start to struct sa_stackinfo */ 180 ssize_t pthread__stackinfo_offset(void); 181 182 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 183 struct pthread_queue_t *threadq); 184 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 185 struct pthread_queue_t *queue, pthread_t target); 186 int pthread__park(pthread_t self, pthread_spin_t *lock, 187 struct pthread_queue_t *threadq, 188 const struct timespec *abs_timeout, 189 int cancelpt); 190 191 int pthread__stackalloc(pthread_t *t); 192 void pthread__initmain(pthread_t *t); 193 194 /* Internal locking primitives */ 195 void pthread__lockprim_init(int ncpu); 196 void pthread_lockinit(pthread_spin_t *lock); 197 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 198 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 199 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 200 201 extern const struct pthread_lock_ops *pthread__lock_ops; 202 203 #define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp) 204 #define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp) 205 #define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp) 206 207 #ifndef _getcontext_u 208 int _getcontext_u(ucontext_t *); 209 #endif 210 #ifndef _setcontext_u 211 int _setcontext_u(const ucontext_t *); 212 #endif 213 #ifndef _swapcontext_u 214 int _swapcontext_u(ucontext_t *, const ucontext_t *); 215 #endif 216 217 void pthread__testcancel(pthread_t self); 218 int pthread__find(pthread_t self, pthread_t target); 219 220 #ifndef PTHREAD_MD_INIT 221 #define PTHREAD_MD_INIT 222 #endif 223 224 #ifndef _INITCONTEXT_U_MD 225 #define _INITCONTEXT_U_MD(ucp) 226 #endif 227 228 #define _INITCONTEXT_U(ucp) do { \ 229 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 230 _INITCONTEXT_U_MD(ucp) \ 231 } while (/*CONSTCOND*/0) 232 233 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 234 #define pthread__id(reg) (reg) 235 #else 236 /* Stack location of pointer to a particular thread */ 237 #define pthread__id(sp) \ 238 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 239 240 #define pthread__id_reg() pthread__sp() 241 #endif 242 243 #define pthread__self() (pthread__id(pthread__id_reg())) 244 245 #define pthread__abort() \ 246 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 247 248 #define pthread__assert(e) do { \ 249 if (__predict_false(!(e))) \ 250 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 251 } while (/*CONSTCOND*/0) 252 253 #define pthread__error(err, msg, e) do { \ 254 if (__predict_false(!(e))) { \ 255 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 256 return (err); \ 257 } \ 258 } while (/*CONSTCOND*/0) 259 260 void pthread__destroy_tsd(pthread_t self); 261 void pthread__assertfunc(const char *file, int line, const char *function, 262 const char *expr); 263 void pthread__errorfunc(const char *file, int line, const char *function, 264 const char *msg); 265 266 #endif /* _LIB_PTHREAD_INT_H */ 267
Indexes created Mon Sep 22 13:09:51 GMT 2025