pthread_int.h revision 1.46
1 /* $NetBSD: pthread_int.h,v 1.46 2007/08/16 00:41:23 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; /* Magic number */ 75 int pt_num; /* ID XXX should die */ 76 int pt_state; /* running, blocked, etc. */ 77 pthread_spin_t pt_lock; /* lock on state */ 78 int pt_flags; /* see PT_FLAG_* below */ 79 int pt_cancel; /* Deferred cancellation */ 80 int pt_spinlocks; /* Number of spinlocks held. */ 81 void *pt_mutexhint; /* Last mutex held. */ 82 int pt_errno; /* Thread-specific errno. */ 83 stack_t pt_stack; /* Our stack */ 84 void *pt_exitval; /* Read by pthread_join() */ 85 char *pt_name; /* Thread's name, set by the app. */ 86 int pt_willpark; /* About to park */ 87 lwpid_t pt_unpark; /* Unpark this when parking */ 88 void *pt_unparkhint; /* Hint for the above */ 89 90 /* Stack of cancellation cleanup handlers and their arguments */ 91 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 92 93 /* Thread-specific data */ 94 void *pt_specific[PTHREAD_KEYS_MAX]; 95 96 /* For debugger: LWPs waiting to join. */ 97 pthread_queue_t pt_joiners; 98 PTQ_ENTRY(__pthread_st) pt_joinq; 99 100 /* LWP ID and entry on the list of all threads. */ 101 lwpid_t pt_lid; 102 PTQ_ENTRY(__pthread_st) pt_allq; 103 104 /* 105 * General synchronization data. We try to align, as threads 106 * on other CPUs will access this data frequently. 107 */ 108 int pt_dummy1 __aligned(128); 109 int pt_sleeponq; /* on a sleep queue */ 110 int pt_signalled; /* Received pthread_cond_signal() */ 111 void *pt_sleepobj; /* object slept on */ 112 pthread_queue_t *pt_sleepq; /* sleep queue */ 113 PTQ_ENTRY(__pthread_st) pt_sleep; 114 int pt_dummy2 __aligned(128); 115 116 /* 117 * Context for thread creation. At the end as it's cached 118 * and then only ever passed to _lwp_create(). 119 */ 120 ucontext_t pt_uc; 121 }; 122 123 /* Thread states */ 124 #define PT_STATE_RUNNING 1 125 #define PT_STATE_ZOMBIE 5 126 #define PT_STATE_DEAD 6 127 128 /* Flag values */ 129 130 #define PT_FLAG_DETACHED 0x0001 131 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 132 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 133 #define PT_FLAG_CS_PENDING 0x0010 134 #define PT_FLAG_SCOPE_SYSTEM 0x0040 135 #define PT_FLAG_EXPLICIT_SCHED 0x0080 136 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 137 138 #define PT_MAGIC 0x11110001 139 #define PT_DEAD 0xDEAD0001 140 141 #define PT_ATTR_MAGIC 0x22220002 142 #define PT_ATTR_DEAD 0xDEAD0002 143 144 #ifdef PT_FIXEDSTACKSIZE_LG 145 146 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 147 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 148 #define PT_STACKMASK (PT_STACKSIZE-1) 149 150 #else /* PT_FIXEDSTACKSIZE_LG */ 151 152 extern int pthread_stacksize_lg; 153 extern size_t pthread_stacksize; 154 extern vaddr_t pthread_stackmask; 155 156 #define PT_STACKSIZE_LG pthread_stacksize_lg 157 #define PT_STACKSIZE pthread_stacksize 158 #define PT_STACKMASK pthread_stackmask 159 160 #endif /* PT_FIXEDSTACKSIZE_LG */ 161 162 /* Flag to be used in a ucontext_t's uc_flags indicating that 163 * the saved register state is "user" state only, not full 164 * trap state. 165 */ 166 #define _UC_USER_BIT 30 167 #define _UC_USER (1LU << _UC_USER_BIT) 168 169 void pthread_init(void) __attribute__ ((__constructor__)); 170 171 /* Utility functions */ 172 173 /* Get offset from stack start to struct sa_stackinfo */ 174 ssize_t pthread__stackinfo_offset(void); 175 176 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 177 pthread_queue_t *threadq); 178 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 179 pthread_queue_t *queue, pthread_t target); 180 int pthread__park(pthread_t self, pthread_spin_t *lock, 181 pthread_queue_t *threadq, 182 const struct timespec *abs_timeout, 183 int cancelpt, const void *hint); 184 185 int pthread__stackalloc(pthread_t *t); 186 void pthread__initmain(pthread_t *t); 187 188 /* Internal locking primitives */ 189 void pthread__lockprim_init(int ncpu); 190 void pthread_lockinit(pthread_spin_t *lock); 191 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 192 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 193 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 194 195 extern const struct pthread_lock_ops *pthread__lock_ops; 196 197 void pthread__simple_lock_init(__cpu_simple_lock_t *); 198 int pthread__simple_lock_try(__cpu_simple_lock_t *); 199 void pthread__simple_unlock(__cpu_simple_lock_t *); 200 201 #ifndef _getcontext_u 202 int _getcontext_u(ucontext_t *); 203 #endif 204 #ifndef _setcontext_u 205 int _setcontext_u(const ucontext_t *); 206 #endif 207 #ifndef _swapcontext_u 208 int _swapcontext_u(ucontext_t *, const ucontext_t *); 209 #endif 210 211 void pthread__testcancel(pthread_t self); 212 int pthread__find(pthread_t self, pthread_t target); 213 214 #ifndef PTHREAD_MD_INIT 215 #define PTHREAD_MD_INIT 216 #endif 217 218 #ifndef _INITCONTEXT_U_MD 219 #define _INITCONTEXT_U_MD(ucp) 220 #endif 221 222 #define _INITCONTEXT_U(ucp) do { \ 223 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 224 _INITCONTEXT_U_MD(ucp) \ 225 } while (/*CONSTCOND*/0) 226 227 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 228 #define pthread__id(reg) (reg) 229 #else 230 /* Stack location of pointer to a particular thread */ 231 #define pthread__id(sp) \ 232 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 233 234 #define pthread__id_reg() pthread__sp() 235 #endif 236 237 #define pthread__self() (pthread__id(pthread__id_reg())) 238 239 #define pthread__abort() \ 240 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 241 242 #define pthread__assert(e) do { \ 243 if (__predict_false(!(e))) \ 244 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 245 } while (/*CONSTCOND*/0) 246 247 #define pthread__error(err, msg, e) do { \ 248 if (__predict_false(!(e))) { \ 249 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 250 return (err); \ 251 } \ 252 } while (/*CONSTCOND*/0) 253 254 void pthread__destroy_tsd(pthread_t self); 255 void pthread__assertfunc(const char *file, int line, const char *function, 256 const char *expr); 257 void pthread__errorfunc(const char *file, int line, const char *function, 258 const char *msg); 259 260 #if defined(i386) || defined(__x86_64__) 261 #define pthread__smt_pause() __asm __volatile("rep; nop" ::: "memory") 262 #else 263 #define pthread__smt_pause() /* nothing */ 264 #endif 265 266 extern int pthread__nspins; 267 extern int pthread__osrev; 268 269 #endif /* _LIB_PTHREAD_INT_H */ 270
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