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/* $OpenBSD: rthread.h,v 1.37 2012/03/22 15:26:04 kurt Exp $ */
/*
* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Private data structures that back up the typedefs in pthread.h.
* Since only the thread library cares about their size or arrangement,
* it should be possible to switch libraries without relinking.
*
* Do not reorder _spinlock_lock_t and sem_t variables in the structs.
* This is due to alignment requirements of certain arches like hppa.
* The current requirement is 16 bytes.
*/
#include <sys/queue.h>
#include <semaphore.h>
#include <machine/spinlock.h>
#include <machine/tcb.h> /* for TLS_VARIANT */
#ifdef __LP64__
#define RTHREAD_STACK_SIZE_DEF (512 * 1024)
#else
#define RTHREAD_STACK_SIZE_DEF (256 * 1024)
#endif
struct stack {
SLIST_ENTRY(stack) link; /* link for free default stacks */
void *sp; /* machine stack pointer */
void *base; /* bottom of allocated area */
size_t guardsize; /* size of PROT_NONE zone or */
/* ==1 if application alloced */
size_t len; /* total size of allocated stack */
};
struct sem {
_spinlock_lock_t lock;
volatile int waitcount;
volatile int value;
int pad;
};
TAILQ_HEAD(pthread_queue, pthread);
struct pthread_mutex {
_spinlock_lock_t lock;
struct pthread_queue lockers;
int type;
pthread_t owner;
int count;
int prioceiling;
};
struct pthread_mutex_attr {
int ma_type;
int ma_protocol;
int ma_prioceiling;
};
struct pthread_cond {
_spinlock_lock_t lock;
struct pthread_queue waiters;
struct pthread_mutex *mutex;
clockid_t clock;
};
struct pthread_cond_attr {
clockid_t ca_clock;
};
struct pthread_rwlock {
_spinlock_lock_t lock;
pthread_t owner;
struct pthread_queue writers;
int readers;
};
struct pthread_rwlockattr {
int pshared;
};
struct pthread_attr {
void *stack_addr;
size_t stack_size;
size_t guard_size;
int detach_state;
int contention_scope;
int sched_policy;
struct sched_param sched_param;
int sched_inherit;
};
#define PTHREAD_MIN_PRIORITY 0
#define PTHREAD_MAX_PRIORITY 31
struct rthread_key {
int used;
void (*destructor)(void *);
};
struct rthread_storage {
int keyid;
struct rthread_storage *next;
void *data;
};
struct rthread_cleanup_fn {
void (*fn)(void *);
void *arg;
struct rthread_cleanup_fn *next;
};
struct pthread {
struct sem donesem;
#if TLS_VARIANT == 1
int *errno_ptr;
#endif
pid_t tid;
unsigned int flags;
_spinlock_lock_t flags_lock;
void *retval;
void *(*fn)(void *);
void *arg;
char name[32];
struct stack *stack;
LIST_ENTRY(pthread) threads;
TAILQ_ENTRY(pthread) waiting;
pthread_cond_t blocking_cond;
int sched_policy;
struct pthread_attr attr;
struct sched_param sched_param;
struct rthread_storage *local_storage;
struct rthread_cleanup_fn *cleanup_fns;
int myerrno;
/* currently in a cancel point? */
int cancel_point;
/* cancel received in a delayed cancel block? */
int delayed_cancel;
};
#define THREAD_DONE 0x001
#define THREAD_DETACHED 0x002
#define THREAD_CANCELED 0x004
#define THREAD_CANCEL_ENABLE 0x008
#define THREAD_CANCEL_DEFERRED 0x010
#define THREAD_CANCEL_DELAY 0x020
#define THREAD_DYING 0x040
#define IS_CANCELED(thread) \
(((thread)->flags & (THREAD_CANCELED|THREAD_DYING)) == THREAD_CANCELED)
extern int _threads_ready;
extern size_t _thread_pagesize;
extern LIST_HEAD(listhead, pthread) _thread_list;
extern struct pthread _initial_thread;
extern _spinlock_lock_t _thread_lock;
extern struct pthread_attr _rthread_attr_default;
#define ROUND_TO_PAGE(size) \
(((size) + (_thread_pagesize - 1)) & ~(_thread_pagesize - 1))
void _spinlock(_spinlock_lock_t *);
void _spinunlock(_spinlock_lock_t *);
int _sem_wait(sem_t, int, const struct timespec *, int *);
int _sem_post(sem_t);
int _rthread_init(void);
void _rthread_setflag(pthread_t, int);
void _rthread_clearflag(pthread_t, int);
struct stack *_rthread_alloc_stack(pthread_t);
void _rthread_free_stack(struct stack *);
void _rthread_tls_destructors(pthread_t);
void _rthread_debug(int, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
void _rthread_debug_init(void);
#if defined(__ELF__) && defined(PIC)
void _rthread_dl_lock(int what);
void _rthread_bind_lock(int);
#endif
/* rthread_cancel.c */
void _enter_cancel(pthread_t);
void _leave_cancel(pthread_t);
void _enter_delayed_cancel(pthread_t);
void _leave_delayed_cancel(pthread_t, int);
void _thread_dump_info(void);
int _atomic_lock(register volatile _spinlock_lock_t *);
/* syscalls */
int getthrid(void);
void __threxit(pid_t *);
int __thrsleep(const volatile void *, clockid_t, const struct timespec *,
void *, const int *);
int __thrwakeup(const volatile void *, int n);
int __thrsigdivert(sigset_t, siginfo_t *, const struct timespec *);
int sched_yield(void);
int _thread_sys_sigaction(int, const struct sigaction *,
struct sigaction *);
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