1/* $OpenBSD: rthread.h,v 1.64 2019/02/13 13:22:14 mpi Exp $ */ 2/* 3 * Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org> 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18/* 19 * Private data structures that back up the typedefs in pthread.h. 20 * Since only the thread library cares about their size or arrangement, 21 * it should be possible to switch libraries without relinking. 22 * 23 * Do not reorder _atomic_lock_t and sem_t variables in the structs. 24 * This is due to alignment requirements of certain arches like hppa. 25 * The current requirement is 16 bytes. 26 * 27 * THE MACHINE DEPENDENT CERROR CODE HAS HARD CODED OFFSETS INTO PTHREAD_T! 28 */ 29 30#ifndef _RTHREAD_H_ 31#define _RTHREAD_H_ 32 33#include <semaphore.h> 34#include "thread_private.h" 35 36#ifdef __LP64__ 37#define RTHREAD_STACK_SIZE_DEF (512 * 1024) 38#else 39#define RTHREAD_STACK_SIZE_DEF (256 * 1024) 40#endif 41 42struct stack { 43 SLIST_ENTRY(stack) link; /* link for free default stacks */ 44 void *sp; /* machine stack pointer */ 45 void *base; /* bottom of allocated area */ 46 size_t guardsize; /* size of PROT_NONE zone or */ 47 /* ==1 if application alloced */ 48 size_t len; /* total size of allocated stack */ 49}; 50 51#define PTHREAD_MIN_PRIORITY 0 52#define PTHREAD_MAX_PRIORITY 31 53 54 55struct pthread_rwlockattr { 56 int pshared; 57}; 58 59struct pthread_barrier { 60 pthread_mutex_t mutex; 61 pthread_cond_t cond; 62 int threshold; 63 int in; 64 int out; 65 int generation; 66}; 67 68struct pthread_barrierattr { 69 int pshared; 70}; 71 72struct pthread_spinlock { 73 _atomic_lock_t lock; 74 pthread_t owner; 75}; 76 77 78#define ROUND_TO_PAGE(size) \ 79 (((size) + (_thread_pagesize - 1)) & ~(_thread_pagesize - 1)) 80 81__BEGIN_HIDDEN_DECLS 82int _sem_wait(sem_t, int, const struct timespec *, int *); 83int _sem_post(sem_t); 84 85void _rthread_init(void); 86struct stack *_rthread_alloc_stack(pthread_t); 87void _rthread_free_stack(struct stack *); 88#ifndef NO_PIC 89void _rthread_dl_lock(int what); 90#endif 91 92extern int _threads_ready; 93extern size_t _thread_pagesize; 94extern LIST_HEAD(listhead, pthread) _thread_list; 95extern _atomic_lock_t _thread_lock; 96extern struct pthread_attr _rthread_attr_default; 97__END_HIDDEN_DECLS 98 99void _thread_dump_info(void); 100 101#define REDIRECT_SYSCALL(x) typeof(x) x asm("_thread_sys_"#x) 102 103#endif /* _RTHREAD_H_ */ 104