104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/* $OpenBSD: rthread.h,v 1.64 2019/02/13 13:22:14 mpi Exp $ */
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/*
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* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
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* All Rights Reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Private data structures that back up the typedefs in pthread.h.
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* Since only the thread library cares about their size or arrangement,
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* it should be possible to switch libraries without relinking.
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*
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* Do not reorder _atomic_lock_t and sem_t variables in the structs.
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* This is due to alignment requirements of certain arches like hppa.
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* The current requirement is 16 bytes.
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*
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* THE MACHINE DEPENDENT CERROR CODE HAS HARD CODED OFFSETS INTO PTHREAD_T!
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*/
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#ifndef _RTHREAD_H_
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#define _RTHREAD_H_
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#include <semaphore.h>
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#include "thread_private.h"
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#ifdef __LP64__
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#define RTHREAD_STACK_SIZE_DEF (512 * 1024)
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#else
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#define RTHREAD_STACK_SIZE_DEF (256 * 1024)
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#endif
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struct stack {
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SLIST_ENTRY(stack) link; /* link for free default stacks */
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void *sp; /* machine stack pointer */
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void *base; /* bottom of allocated area */
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size_t guardsize; /* size of PROT_NONE zone or */
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/* ==1 if application alloced */
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size_t len; /* total size of allocated stack */
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};
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#define PTHREAD_MIN_PRIORITY 0
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#define PTHREAD_MAX_PRIORITY 31
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struct pthread_rwlockattr {
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int pshared;
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};
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struct pthread_barrier {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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int threshold;
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int in;
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int out;
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int generation;
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};
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struct pthread_barrierattr {
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int pshared;
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};
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struct pthread_spinlock {
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_atomic_lock_t lock;
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pthread_t owner;
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};
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#define ROUND_TO_PAGE(size) \
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(((size) + (_thread_pagesize - 1)) & ~(_thread_pagesize - 1))
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__BEGIN_HIDDEN_DECLS
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int _sem_wait(sem_t, int, const struct timespec *, int *);
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int _sem_post(sem_t);
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void _rthread_init(void);
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struct stack *_rthread_alloc_stack(pthread_t);
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void _rthread_free_stack(struct stack *);
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#ifndef NO_PIC
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void _rthread_dl_lock(int what);
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#endif
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extern int _threads_ready;
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extern size_t _thread_pagesize;
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extern LIST_HEAD(listhead, pthread) _thread_list;
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extern _atomic_lock_t _thread_lock;
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extern struct pthread_attr _rthread_attr_default;
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__END_HIDDEN_DECLS
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void _thread_dump_info(void);
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#define REDIRECT_SYSCALL(x) typeof(x) x asm("_thread_sys_"#x)
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#endif /* _RTHREAD_H_ */
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