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/* $OpenBSD: rthread.h,v 1.60 2016/09/04 10:13:35 akfaew 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 _atomic_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.
*
* THE MACHINE DEPENDENT CERROR CODE HAS HARD CODED OFFSETS INTO PTHREAD_T!
*/
#include <sys/queue.h>
#include <semaphore.h>
#include <machine/spinlock.h>
#ifdef __LP64__
#define RTHREAD_STACK_SIZE_DEF (512 * 1024)
#else
#define RTHREAD_STACK_SIZE_DEF (256 * 1024)
#endif
#define _SPINLOCK_UNLOCKED _ATOMIC_LOCK_UNLOCKED
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 {
_atomic_lock_t lock;
volatile int waitcount;
volatile int value;
int shared;
};
TAILQ_HEAD(pthread_queue, pthread);
struct pthread_mutex {
_atomic_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 {
_atomic_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 {
_atomic_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_barrier {
pthread_mutex_t mutex;
pthread_cond_t cond;
int threshold;
int in;
int out;
int generation;
};
struct pthread_barrierattr {
int pshared;
};
struct pthread_spinlock {
_atomic_lock_t lock;
pthread_t owner;
};
struct tib;
struct pthread {
struct __sem donesem;
unsigned int flags;
_atomic_lock_t flags_lock;
struct tib *tib;
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;
struct pthread_attr attr;
struct rthread_storage *local_storage;
struct rthread_cleanup_fn *cleanup_fns;
int myerrno;
/* cancel received in a delayed cancel block? */
int delayed_cancel;
};
/* flags in pthread->flags */
#define THREAD_DONE 0x001
#define THREAD_DETACHED 0x002
/* flags in tib->tib_thread_flags */
#define TIB_THREAD_ASYNC_CANCEL 0x001
#define TIB_THREAD_INITIAL_STACK 0x002 /* has stack from exec */
#define ENTER_DELAYED_CANCEL_POINT(tib, self) \
(self)->delayed_cancel = 0; \
ENTER_CANCEL_POINT_INNER(tib, 1, 1)
#define ROUND_TO_PAGE(size) \
(((size) + (_thread_pagesize - 1)) & ~(_thread_pagesize - 1))
__BEGIN_HIDDEN_DECLS
void _spinlock(volatile _atomic_lock_t *);
int _spinlocktry(volatile _atomic_lock_t *);
void _spinunlock(volatile _atomic_lock_t *);
int _sem_wait(sem_t, int, const struct timespec *, int *);
int _sem_post(sem_t);
void _rthread_init(void);
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);
#ifndef NO_PIC
void _rthread_dl_lock(int what);
#endif
void _thread_malloc_reinit(void);
extern int _threads_ready;
extern size_t _thread_pagesize;
extern LIST_HEAD(listhead, pthread) _thread_list;
extern _atomic_lock_t _thread_lock;
extern struct pthread_attr _rthread_attr_default;
__END_HIDDEN_DECLS
void _thread_dump_info(void);
/* syscalls not declared in system headers */
#define REDIRECT_SYSCALL(x) typeof(x) x asm("_thread_sys_"#x)
void __threxit(pid_t *);
int __thrsleep(const volatile void *, clockid_t, const struct timespec *,
volatile void *, const int *);
int __thrwakeup(const volatile void *, int n);
int __thrsigdivert(sigset_t, siginfo_t *, const struct timespec *);
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