Annotation of src/lib/libpthread/pthread_int.h, Revision 1.39
1.39 ! ad 1: /* $NetBSD: pthread_int.h,v 1.38 2007/03/02 18:53:52 ad Exp $ */
1.2 thorpej 2:
3: /*-
1.38 ad 4: * Copyright (c) 2001, 2002, 2003, 2006, 2007 The NetBSD Foundation, Inc.
1.2 thorpej 5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
1.38 ad 8: * by Nathan J. Williams and Andrew Doran.
1.2 thorpej 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:
1.35 ad 50: #include <lwp.h>
1.2 thorpej 51: #include <signal.h>
52:
1.15 nathanw 53: #define PTHREAD_KEYS_MAX 256
1.2 thorpej 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:
1.16 nathanw 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;
1.2 thorpej 71: };
72:
1.15 nathanw 73: struct __pthread_st {
1.2 thorpej 74: unsigned int pt_magic;
1.4 nathanw 75: /* Identifier, for debugging and for preventing recycling. */
76: int pt_num;
1.2 thorpej 77:
1.35 ad 78: lwpid_t pt_lid; /* LWP ID */
1.2 thorpej 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 */
1.17 nathanw 82: pthread_spin_t pt_flaglock; /* lock on pt_flag */
1.2 thorpej 83: int pt_cancel; /* Deferred cancellation */
84: int pt_spinlocks; /* Number of spinlocks held. */
1.36 ad 85: int pt_sleeponq; /* on a sleep queue */
1.2 thorpej 86: int pt_errno; /* Thread-specific errno. */
87:
88: /* Entry on the list of all threads */
1.15 nathanw 89: PTQ_ENTRY(__pthread_st) pt_allq;
1.2 thorpej 90: /* Entry on the sleep queue (xxx should be same as run queue?) */
1.15 nathanw 91: PTQ_ENTRY(__pthread_st) pt_sleep;
1.35 ad 92: /*
93: * Object we're sleeping on. For 1:1 threads (!SA), this is
94: * protected by the interlock on the object that the thread is
95: * sleeping on.
96: */
1.6 jdolecek 97: void *pt_sleepobj;
1.2 thorpej 98: /* Queue we're sleeping on */
1.6 jdolecek 99: struct pthread_queue_t *pt_sleepq;
1.2 thorpej 100:
101: stack_t pt_stack; /* Our stack */
102: ucontext_t *pt_uc; /* Saved context when we're stopped */
1.38 ad 103: void *pt_exitval; /* Read by pthread_join() */
104: char *pt_name; /* Thread's name, set by the app. */
1.2 thorpej 105:
106: /* Stack of cancellation cleanup handlers and their arguments */
107: PTQ_HEAD(, pt_clean_t) pt_cleanup_stack;
108:
109: /* Other threads trying to pthread_join() us. */
110: struct pthread_queue_t pt_joiners;
111: /* Lock for above, and for changing pt_state to ZOMBIE or DEAD,
1.9 thorpej 112: * and for setting the DETACHED flag. Also protects pt_name.
1.2 thorpej 113: */
114: pthread_spin_t pt_join_lock;
115:
116: /* Thread-specific data */
117: void* pt_specific[PTHREAD_KEYS_MAX];
118: };
119:
120: struct pthread_lock_ops {
121: void (*plo_init)(__cpu_simple_lock_t *);
122: int (*plo_try)(__cpu_simple_lock_t *);
123: void (*plo_unlock)(__cpu_simple_lock_t *);
124: };
125:
126: /* Thread states */
127: #define PT_STATE_RUNNING 1
128: #define PT_STATE_ZOMBIE 5
129: #define PT_STATE_DEAD 6
1.35 ad 130:
1.2 thorpej 131: /* Flag values */
132:
133: #define PT_FLAG_DETACHED 0x0001
134: #define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */
135: #define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */
136: #define PT_FLAG_CS_PENDING 0x0010
1.15 nathanw 137: #define PT_FLAG_SCOPE_SYSTEM 0x0040
138: #define PT_FLAG_EXPLICIT_SCHED 0x0080
1.29 nathanw 139: #define PT_FLAG_SUSPENDED 0x0100 /* In the suspended queue */
1.2 thorpej 140:
141: #define PT_MAGIC 0x11110001
142: #define PT_DEAD 0xDEAD0001
143:
144: #define PT_ATTR_MAGIC 0x22220002
145: #define PT_ATTR_DEAD 0xDEAD0002
146:
1.22 cl 147: #ifdef PT_FIXEDSTACKSIZE_LG
148:
149: #define PT_STACKSIZE_LG PT_FIXEDSTACKSIZE_LG
150: #define PT_STACKSIZE (1<<(PT_STACKSIZE_LG))
151: #define PT_STACKMASK (PT_STACKSIZE-1)
152:
153: #else /* PT_FIXEDSTACKSIZE_LG */
154:
1.25 nathanw 155: extern int pthread_stacksize_lg;
156: extern size_t pthread_stacksize;
157: extern vaddr_t pthread_stackmask;
158:
159: #define PT_STACKSIZE_LG pthread_stacksize_lg
160: #define PT_STACKSIZE pthread_stacksize
161: #define PT_STACKMASK pthread_stackmask
1.22 cl 162:
163: #endif /* PT_FIXEDSTACKSIZE_LG */
164:
1.2 thorpej 165: /* Flag to be used in a ucontext_t's uc_flags indicating that
166: * the saved register state is "user" state only, not full
167: * trap state.
168: */
169: #define _UC_USER_BIT 30
170: #define _UC_USER (1LU << _UC_USER_BIT)
171:
172: void pthread_init(void) __attribute__ ((__constructor__));
173:
174: /* Utility functions */
175:
176: /* Set up/clean up a thread's basic state. */
177: void pthread__initthread(pthread_t self, pthread_t t);
1.24 cl 178: /* Get offset from stack start to struct sa_stackinfo */
179: ssize_t pthread__stackinfo_offset(void);
1.2 thorpej 180:
1.35 ad 181: void pthread__unpark_all(pthread_t self, pthread_spin_t *lock,
1.39 ! ad 182: struct pthread_queue_t *threadq);
1.35 ad 183: void pthread__unpark(pthread_t self, pthread_spin_t *lock,
1.39 ! ad 184: struct pthread_queue_t *queue, pthread_t target);
1.35 ad 185: int pthread__park(pthread_t self, pthread_spin_t *lock,
1.39 ! ad 186: struct pthread_queue_t *threadq,
! 187: const struct timespec *abs_timeout,
1.36 ad 188: int cancelpt);
1.35 ad 189:
1.2 thorpej 190: int pthread__stackalloc(pthread_t *t);
191: void pthread__initmain(pthread_t *t);
192:
193: /* Internal locking primitives */
1.26 cl 194: void pthread__lockprim_init(int ncpu);
1.2 thorpej 195: void pthread_lockinit(pthread_spin_t *lock);
196: void pthread_spinlock(pthread_t thread, pthread_spin_t *lock);
197: int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock);
198: void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock);
199:
200: extern const struct pthread_lock_ops *pthread__lock_ops;
201:
202: #define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp)
203: #define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp)
204: #define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp)
205:
206: #ifndef _getcontext_u
207: int _getcontext_u(ucontext_t *);
208: #endif
209: #ifndef _setcontext_u
210: int _setcontext_u(const ucontext_t *);
211: #endif
212: #ifndef _swapcontext_u
213: int _swapcontext_u(ucontext_t *, const ucontext_t *);
214: #endif
215:
216: void pthread__testcancel(pthread_t self);
217: int pthread__find(pthread_t self, pthread_t target);
218:
219: #ifndef PTHREAD_MD_INIT
220: #define PTHREAD_MD_INIT
221: #endif
222:
223: #ifndef _INITCONTEXT_U_MD
224: #define _INITCONTEXT_U_MD(ucp)
225: #endif
226:
227: #define _INITCONTEXT_U(ucp) do { \
228: (ucp)->uc_flags = _UC_CPU | _UC_STACK; \
229: _INITCONTEXT_U_MD(ucp) \
1.3 christos 230: } while (/*CONSTCOND*/0)
1.2 thorpej 231:
1.13 nathanw 232: #ifdef PTHREAD_MACHINE_HAS_ID_REGISTER
233: #define pthread__id(reg) (reg)
234: #else
1.2 thorpej 235: /* Stack location of pointer to a particular thread */
236: #define pthread__id(sp) \
237: ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK))
238:
1.13 nathanw 239: #define pthread__id_reg() pthread__sp()
240: #endif
241:
242: #define pthread__self() (pthread__id(pthread__id_reg()))
1.2 thorpej 243:
1.12 christos 244: #define pthread__abort() \
245: pthread__assertfunc(__FILE__, __LINE__, __func__, "unreachable")
246:
1.11 nathanw 247: #define pthread__assert(e) do { \
248: if (__predict_false(!(e))) \
249: pthread__assertfunc(__FILE__, __LINE__, __func__, #e); \
1.12 christos 250: } while (/*CONSTCOND*/0)
1.11 nathanw 251:
252: #define pthread__error(err, msg, e) do { \
253: if (__predict_false(!(e))) { \
254: pthread__errorfunc(__FILE__, __LINE__, __func__, msg); \
255: return (err); \
256: } \
1.12 christos 257: } while (/*CONSTCOND*/0)
1.11 nathanw 258:
1.2 thorpej 259: void pthread__destroy_tsd(pthread_t self);
1.27 drochner 260: void pthread__assertfunc(const char *file, int line, const char *function,
261: const char *expr);
262: void pthread__errorfunc(const char *file, int line, const char *function,
263: const char *msg);
1.2 thorpej 264:
265: #endif /* _LIB_PTHREAD_INT_H */
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