pthread_int.h revision 1.47
1 /* $NetBSD: pthread_int.h,v 1.47 2007/08/16 01:09:35 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 extern int pthread__stacksize_lg; 145 extern size_t pthread__stacksize; 146 extern vaddr_t pthread__stackmask; 147 148 /* Flag to be used in a ucontext_t's uc_flags indicating that 149 * the saved register state is "user" state only, not full 150 * trap state. 151 */ 152 #define _UC_USER_BIT 30 153 #define _UC_USER (1LU << _UC_USER_BIT) 154 155 void pthread_init(void) __attribute__ ((__constructor__)); 156 157 /* Utility functions */ 158 void pthread__unpark_all(pthread_t self, pthread_spin_t *lock, 159 pthread_queue_t *threadq); 160 void pthread__unpark(pthread_t self, pthread_spin_t *lock, 161 pthread_queue_t *queue, pthread_t target); 162 int pthread__park(pthread_t self, pthread_spin_t *lock, 163 pthread_queue_t *threadq, 164 const struct timespec *abs_timeout, 165 int cancelpt, const void *hint); 166 167 /* Internal locking primitives */ 168 void pthread__lockprim_init(int ncpu); 169 void pthread_lockinit(pthread_spin_t *lock); 170 void pthread_spinlock(pthread_t thread, pthread_spin_t *lock); 171 int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock); 172 void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock); 173 174 extern const struct pthread_lock_ops *pthread__lock_ops; 175 176 void pthread__simple_lock_init(__cpu_simple_lock_t *); 177 int pthread__simple_lock_try(__cpu_simple_lock_t *); 178 void pthread__simple_unlock(__cpu_simple_lock_t *); 179 180 #ifndef _getcontext_u 181 int _getcontext_u(ucontext_t *); 182 #endif 183 #ifndef _setcontext_u 184 int _setcontext_u(const ucontext_t *); 185 #endif 186 #ifndef _swapcontext_u 187 int _swapcontext_u(ucontext_t *, const ucontext_t *); 188 #endif 189 190 void pthread__testcancel(pthread_t self); 191 int pthread__find(pthread_t self, pthread_t target); 192 193 #ifndef PTHREAD_MD_INIT 194 #define PTHREAD_MD_INIT 195 #endif 196 197 #ifndef _INITCONTEXT_U_MD 198 #define _INITCONTEXT_U_MD(ucp) 199 #endif 200 201 #define _INITCONTEXT_U(ucp) do { \ 202 (ucp)->uc_flags = _UC_CPU | _UC_STACK; \ 203 _INITCONTEXT_U_MD(ucp) \ 204 } while (/*CONSTCOND*/0) 205 206 #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER 207 #define pthread__id(reg) (reg) 208 #else 209 /* Stack location of pointer to a particular thread */ 210 #define pthread__id(sp) \ 211 ((pthread_t) (((vaddr_t)(sp)) & ~pthread__stackmask)) 212 213 #define pthread__id_reg() pthread__sp() 214 #endif 215 216 #define pthread__self() (pthread__id(pthread__id_reg())) 217 218 #define pthread__abort() \ 219 pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable") 220 221 #define pthread__assert(e) do { \ 222 if (__predict_false(!(e))) \ 223 pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \ 224 } while (/*CONSTCOND*/0) 225 226 #define pthread__error(err, msg, e) do { \ 227 if (__predict_false(!(e))) { \ 228 pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \ 229 return (err); \ 230 } \ 231 } while (/*CONSTCOND*/0) 232 233 void pthread__destroy_tsd(pthread_t self); 234 void pthread__assertfunc(const char *file, int line, const char *function, 235 const char *expr); 236 void pthread__errorfunc(const char *file, int line, const char *function, 237 const char *msg); 238 239 #if defined(i386) || defined(__x86_64__) 240 #define pthread__smt_pause() __asm __volatile("rep; nop" ::: "memory") 241 #else 242 #define pthread__smt_pause() /* nothing */ 243 #endif 244 245 extern int pthread__nspins; 246 extern int pthread__osrev; 247 248 #endif /* _LIB_PTHREAD_INT_H */ 249
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