pthread_int.h revision 1.42.2.1
1 /* $NetBSD: pthread_int.h,v 1.42.2.1 2007/08/15 13:46:52 skrll 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 ucontext_t *pt_uc; /* Saved context when we're stopped */ 85 void *pt_exitval; /* Read by pthread_join() */ 86 char *pt_name; /* Thread's name, set by the app. */ 87 int pt_willpark; /* About to park */ 88 lwpid_t pt_unpark; /* Unpark this when parking */ 89 void *pt_unparkhint; /* Hint for the above */ 90 91 /* Stack of cancellation cleanup handlers and their arguments */ 92 PTQ_HEAD(, pt_clean_t) pt_cleanup_stack; 93 94 /* Thread-specific data */ 95 void *pt_specific[PTHREAD_KEYS_MAX]; 96 97 /* For debugger: LWPs waiting to join. */ 98 pthread_queue_t pt_joiners; 99 PTQ_ENTRY(__pthread_st) pt_joinq; 100 101 /* LWP ID and entry on the list of all threads. */ 102 lwpid_t pt_lid; 103 PTQ_ENTRY(__pthread_st) pt_allq; 104 105 /* 106 * General synchronization data. We try to align, as threads 107 * on other CPUs will access this data frequently. 108 */ 109 int pt_dummy1 __aligned(128); 110 int pt_sleeponq; /* on a sleep queue */ 111 int pt_signalled; /* Received pthread_cond_signal() */ 112 void *pt_sleepobj; /* object slept on */ 113 pthread_queue_t *pt_sleepq; /* sleep queue */ 114 PTQ_ENTRY(__pthread_st) pt_sleep; 115 int pt_dummy2 __aligned(128); 116 }; 117 118 /* Thread states */ 119 #define PT_STATE_RUNNING 1 120 #define PT_STATE_ZOMBIE 5 121 #define PT_STATE_DEAD 6 122 123 /* Flag values */ 124 125 #define PT_FLAG_DETACHED 0x0001 126 #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */ 127 #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */ 128 #define PT_FLAG_CS_PENDING 0x0010 129 #define PT_FLAG_SCOPE_SYSTEM 0x0040 130 #define PT_FLAG_EXPLICIT_SCHED 0x0080 131 #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */ 132 133 #define PT_MAGIC 0x11110001 134 #define PT_DEAD 0xDEAD0001 135 136 #define PT_ATTR_MAGIC 0x22220002 137 #define PT_ATTR_DEAD 0xDEAD0002 138 139 #ifdef PT_FIXEDSTACKSIZE_LG 140 141 #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG 142 #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG)) 143 #define PT_STACKMASK (PT_STACKSIZE-1) 144 145 #else /* PT_FIXEDSTACKSIZE_LG */ 146 147 extern int pthread_stacksize_lg; 148 extern size_t pthread_stacksize; 149 extern vaddr_t pthread_stackmask; 150 151 #define PT_STACKSIZE_LG pthread_stacksize_lg 152 #define PT_STACKSIZE pthread_stacksize 153 #define PT_STACKMASK pthread_stackmask 154 155 #endif /* PT_FIXEDSTACKSIZE_LG */ 156 157 /* Flag to be used in a ucontext_t's uc_flags indicating that 158 * the saved register state is "user" state only, not full 159 * trap state. 160 */ 161 #define _UC_USER_BIT 30 162 #define _UC_USER (1LU << _UC_USER_BIT) 163 164 void pthread_init(void) __attribute__ ((__constructor__)); 165 166 /* Utility functions */ 167 168 /* Get offset from stack start to struct sa_stackinfo */ 169 ssize_t pthread__stackinfo_offset(void); 170 171 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 172 pthread_queue_t *threadq); 173 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 174 pthread_queue_t *queue, pthread_t target); 175 int pthread__park(pthread_t self, pthread_spin_t *lock, 176 pthread_queue_t *threadq, 177 const struct timespec *abs_timeout, 178 int cancelpt, const void *hint); 179 180 int pthread__stackalloc(pthread_t *t); 181 void pthread__initmain(pthread_t *t); 182 183 /* Internal locking primitives */ 184 void pthread__lockprim_init(int ncpu); 185 void pthread_lockinit(pthread_spin_t *lock); 186 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 187 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 188 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 189 190 extern const struct pthread_lock_ops *pthread__lock_ops; 191 192 int pthread__simple_locked_p(__cpu_simple_lock_t *); 193 void pthread__simple_lock_init(__cpu_simple_lock_t *); 194 int pthread__simple_lock_try(__cpu_simple_lock_t *); 195 void pthread__simple_unlock(__cpu_simple_lock_t *); 196 197 #ifndef _getcontext_u 198 int _getcontext_u(ucontext_t *); 199 #endif 200 #ifndef _setcontext_u 201 int _setcontext_u(const ucontext_t *); 202 #endif 203 #ifndef _swapcontext_u 204 int _swapcontext_u(ucontext_t *, const ucontext_t *); 205 #endif 206 207 void pthread__testcancel(pthread_t self); 208 int pthread__find(pthread_t self, pthread_t target); 209 210 #ifndef PTHREAD_MD_INIT 211 #define PTHREAD_MD_INIT 212 #endif 213 214 #ifndef _INITCONTEXT_U_MD 215 #define _INITCONTEXT_U_MD(ucp) 216 #endif 217 218 #define _INITCONTEXT_U(ucp) do { \ 219 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 220 _INITCONTEXT_U_MD(ucp) \ 221 } while (/*CONSTCOND*/0) 222 223 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 224 #define pthread__id(reg) (reg) 225 #else 226 /* Stack location of pointer to a particular thread */ 227 #define pthread__id(sp) \ 228 ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK)) 229 230 #define pthread__id_reg() pthread__sp() 231 #endif 232 233 #define pthread__self() (pthread__id(pthread__id_reg())) 234 235 #define pthread__abort() \ 236 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 237 238 #define pthread__assert(e) do { \ 239 if (__predict_false(!(e))) \ 240 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 241 } while (/*CONSTCOND*/0) 242 243 #define pthread__error(err, msg, e) do { \ 244 if (__predict_false(!(e))) { \ 245 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 246 return (err); \ 247 } \ 248 } while (/*CONSTCOND*/0) 249 250 void pthread__destroy_tsd(pthread_t self); 251 void pthread__assertfunc(const char *file, int line, const char *function, 252 const char *expr); 253 void pthread__errorfunc(const char *file, int line, const char *function, 254 const char *msg); 255 256 #if defined(i386) || defined(__x86_64__) 257 #define pthread__smt_pause() __asm __volatile("rep; nop" ::: "memory") 258 #else 259 #define pthread__smt_pause() /* nothing */ 260 #endif 261 262 extern int pthread__nspins; 263 extern int pthread__osrev; 264 265 #endif /* _LIB_PTHREAD_INT_H */ 266
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