pthread_int.h revision 1.42
1 /* $NetBSD: pthread_int.h,v 1.42 2007/04/12 21:36:06 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 int pt_signalled; /* Received pthread_cond_signal() */ 89 90 /* Entry on the list of all threads */ 91 PTQ_ENTRY(__pthread_st) pt_allq; 92 /* Entry on the sleep queue (xxx should be same as run queue?) */ 93 PTQ_ENTRY(__pthread_st) pt_sleep; 94 /* 95 * Object we're sleeping on. For 1:1 threads (!SA), this is 96 * protected by the interlock on the object that the thread is 97 * sleeping on. 98 */ 99 void *pt_sleepobj; 100 /* Queue we're sleeping on */ 101 struct pthread_queue_t *pt_sleepq; 102 103 stack_t pt_stack; /* Our stack */ 104 ucontext_t *pt_uc; /* Saved context when we're stopped */ 105 void *pt_exitval; /* Read by pthread_join() */ 106 char *pt_name; /* Thread's name, set by the app. */ 107 108 /* Stack of cancellation cleanup handlers and their arguments */ 109 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 110 111 /* Other threads trying to pthread_join() us. */ 112 struct pthread_queue_t pt_joiners; 113 /* Lock for above, and for changing pt_state to ZOMBIE or DEAD, 114 * and for setting the DETACHED flag. Also protects pt_name. 115 */ 116 pthread_spin_t pt_join_lock; 117 118 /* Thread-specific data */ 119 void* pt_specific[PTHREAD_KEYS_MAX]; 120 }; 121 122 /* Thread states */ 123 #define PT_STATE_RUNNING 1 124 #define PT_STATE_ZOMBIE 5 125 #define PT_STATE_DEAD 6 126 127 /* Flag values */ 128 129 #define PT_FLAG_DETACHED 0x0001 130 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 131 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 132 #define PT_FLAG_CS_PENDING 0x0010 133 #define PT_FLAG_SCOPE_SYSTEM 0x0040 134 #define PT_FLAG_EXPLICIT_SCHED 0x0080 135 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 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 #ifdef PT_FIXEDSTACKSIZE_LG 144 145 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 146 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 147 #define PT_STACKMASK (PT_STACKSIZE-1) 148 149 #else /* PT_FIXEDSTACKSIZE_LG */ 150 151 extern int pthread_stacksize_lg; 152 extern size_t pthread_stacksize; 153 extern vaddr_t pthread_stackmask; 154 155 #define PT_STACKSIZE_LG pthread_stacksize_lg 156 #define PT_STACKSIZE pthread_stacksize 157 #define PT_STACKMASK pthread_stackmask 158 159 #endif /* PT_FIXEDSTACKSIZE_LG */ 160 161 /* Flag to be used in a ucontext_t's uc_flags indicating that 162 * the saved register state is "user" state only, not full 163 * trap state. 164 */ 165 #define _UC_USER_BIT 30 166 #define _UC_USER (1LU << _UC_USER_BIT) 167 168 void pthread_init(void) __attribute__ ((__constructor__)); 169 170 /* Utility functions */ 171 172 /* Set up/clean up a thread's basic state. */ 173 void pthread__initthread(pthread_t self, pthread_t t); 174 /* Get offset from stack start to struct sa_stackinfo */ 175 ssize_t pthread__stackinfo_offset(void); 176 177 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 178 struct pthread_queue_t *threadq); 179 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 180 struct pthread_queue_t *queue, pthread_t target); 181 int pthread__park(pthread_t self, pthread_spin_t *lock, 182 struct pthread_queue_t *threadq, 183 const struct timespec *abs_timeout, 184 int cancelpt, const void *hint); 185 186 int pthread__stackalloc(pthread_t *t); 187 void pthread__initmain(pthread_t *t); 188 189 /* Internal locking primitives */ 190 void pthread__lockprim_init(int ncpu); 191 void pthread_lockinit(pthread_spin_t *lock); 192 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 193 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 194 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 195 196 extern const struct pthread_lock_ops *pthread__lock_ops; 197 198 void pthread__simple_lock_init(__cpu_simple_lock_t *); 199 int pthread__simple_lock_try(__cpu_simple_lock_t *); 200 void pthread__simple_unlock(__cpu_simple_lock_t *); 201 202 #ifndef _getcontext_u 203 int _getcontext_u(ucontext_t *); 204 #endif 205 #ifndef _setcontext_u 206 int _setcontext_u(const ucontext_t *); 207 #endif 208 #ifndef _swapcontext_u 209 int _swapcontext_u(ucontext_t *, const ucontext_t *); 210 #endif 211 212 void pthread__testcancel(pthread_t self); 213 int pthread__find(pthread_t self, pthread_t target); 214 215 #ifndef PTHREAD_MD_INIT 216 #define PTHREAD_MD_INIT 217 #endif 218 219 #ifndef _INITCONTEXT_U_MD 220 #define _INITCONTEXT_U_MD(ucp) 221 #endif 222 223 #define _INITCONTEXT_U(ucp) do { \ 224 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 225 _INITCONTEXT_U_MD(ucp) \ 226 } while (/*CONSTCOND*/0) 227 228 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 229 #define pthread__id(reg) (reg) 230 #else 231 /* Stack location of pointer to a particular thread */ 232 #define pthread__id(sp) \ 233 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 234 235 #define pthread__id_reg() pthread__sp() 236 #endif 237 238 #define pthread__self() (pthread__id(pthread__id_reg())) 239 240 #define pthread__abort() \ 241 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 242 243 #define pthread__assert(e) do { \ 244 if (__predict_false(!(e))) \ 245 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 246 } while (/*CONSTCOND*/0) 247 248 #define pthread__error(err, msg, e) do { \ 249 if (__predict_false(!(e))) { \ 250 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 251 return (err); \ 252 } \ 253 } while (/*CONSTCOND*/0) 254 255 void pthread__destroy_tsd(pthread_t self); 256 void pthread__assertfunc(const char *file, int line, const char *function, 257 const char *expr); 258 void pthread__errorfunc(const char *file, int line, const char *function, 259 const char *msg); 260 261 #endif /* _LIB_PTHREAD_INT_H */ 262
Indexes created Mon Sep 22 05:09:51 GMT 2025