/*
 * Copyright 2001-2008, Haiku Inc. All Rights Reserved.
 * Distributed under the terms of the Haiku License.
 */
#ifndef _PTHREAD_H_
#define _PTHREAD_H_


#include <stdint.h>
#include <time.h>


typedef struct	_pthread_thread		*pthread_t;
typedef struct  _pthread_attr		*pthread_attr_t;
typedef struct  _pthread_mutex		pthread_mutex_t;
typedef struct  _pthread_mutexattr	*pthread_mutexattr_t;
typedef struct  _pthread_cond		pthread_cond_t;
typedef struct  _pthread_condattr	*pthread_condattr_t;
typedef int							pthread_key_t;
typedef struct  _pthread_once		pthread_once_t;
typedef struct  _pthread_rwlock		pthread_rwlock_t;
typedef struct  _pthread_rwlockattr	*pthread_rwlockattr_t;
/*
typedef struct  _pthread_barrier	*pthread_barrier_t;
typedef struct  _pthread_barrierattr *pthread_barrierattr_t;
typedef struct  _pthread_spinlock	*pthread_spinlock_t;
*/

struct _pthread_mutex {
	uint32_t	flags;
	int32_t		count;
	int32_t		sem;
	int32_t		owner;
	int32_t		owner_count;
};

struct _pthread_cond {
	uint32_t		flags;
	int32_t			sem;
	pthread_mutex_t	*mutex;
	int32_t			waiter_count;
	int32_t			event_counter;
};

struct _pthread_once {
	int32_t		state;
};

struct _pthread_rwlock {
	uint32_t	flags;
	int32_t		owner;
	union {
		struct {
			int32_t		sem;
		} shared;
		struct {
			int32_t		lock_sem;
			int32_t		lock_count;
			int32_t		reader_count;
			int32_t		writer_count;
			void*		waiters[2];
		} local;
	};
};

enum pthread_mutex_type {
	PTHREAD_MUTEX_DEFAULT,
	PTHREAD_MUTEX_NORMAL,
	PTHREAD_MUTEX_ERRORCHECK,
	PTHREAD_MUTEX_RECURSIVE
};

enum pthread_process_shared {
	PTHREAD_PROCESS_PRIVATE,
	PTHREAD_PROCESS_SHARED
};

/*
 * Flags for threads and thread attributes.
 */
#define PTHREAD_DETACHED			0x1
#define PTHREAD_SCOPE_SYSTEM		0x2
#define PTHREAD_INHERIT_SCHED		0x4
#define PTHREAD_NOFLOAT				0x8

#define PTHREAD_CREATE_DETACHED		PTHREAD_DETACHED
#define PTHREAD_CREATE_JOINABLE		0
#define PTHREAD_SCOPE_PROCESS		0
#define PTHREAD_EXPLICIT_SCHED		0

/*
 * Flags for cancelling threads
 */
#define PTHREAD_CANCEL_ENABLE		0
#define PTHREAD_CANCEL_DISABLE		1
#define PTHREAD_CANCEL_DEFERRED		0
#define PTHREAD_CANCEL_ASYNCHRONOUS	2
#define PTHREAD_CANCELED			((void *) 1)

#define PTHREAD_ONCE_INIT 			{ -1 }

#define PTHREAD_BARRIER_SERIAL_THREAD -1
#define PTHREAD_PRIO_NONE			0
#define PTHREAD_PRIO_INHERIT		1
#define PTHREAD_PRIO_PROTECT		2

/* private structure */
struct __pthread_cleanup_handler {
	struct __pthread_cleanup_handler *previous;
	void	(*function)(void *argument);
	void	*argument;
};

#define pthread_cleanup_push(func, arg) \
	do { \
		struct __pthread_cleanup_handler __handler; \
		__handler.function = (func); \
		__handler.argument = (arg); \
		__pthread_cleanup_push_handler(&__handler);

#define pthread_cleanup_pop(execute) \
		if (execute) \
			__handler.function(__handler.argument); \
		__pthread_cleanup_pop_handler(); \
	} while (0)


#ifdef __cplusplus
extern "C" {
#endif

#define PTHREAD_MUTEX_INITIALIZER \
	{ PTHREAD_MUTEX_DEFAULT, 0, -42, -1, 0 }
#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER \
	{ PTHREAD_MUTEX_RECURSIVE, 0, -42, -1, 0 }
#define PTHREAD_COND_INITIALIZER	\
	{ 0, -42, NULL, 0, 0 }

/* mutex functions */
extern int pthread_mutex_destroy(pthread_mutex_t *mutex);
extern int pthread_mutex_getprioceiling(pthread_mutex_t *mutex,
	int *_priorityCeiling);
extern int pthread_mutex_init(pthread_mutex_t *mutex,
	const pthread_mutexattr_t *attr);
extern int pthread_mutex_lock(pthread_mutex_t *mutex);
extern int pthread_mutex_setprioceiling(pthread_mutex_t *mutex,
	int newPriorityCeiling, int *_oldPriorityCeiling);
extern int pthread_mutex_timedlock(pthread_mutex_t *mutex,
	const struct timespec *spec);
extern int pthread_mutex_trylock(pthread_mutex_t *mutex);
extern int pthread_mutex_unlock(pthread_mutex_t *mutex);

/* mutex attribute functions */
extern int pthread_mutexattr_destroy(pthread_mutexattr_t *mutexAttr);
extern int pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mutexAttr,
	int *_priorityCeiling);
extern int pthread_mutexattr_getprotocol(pthread_mutexattr_t *mutexAttr,
	int *_protocol);
extern int pthread_mutexattr_getpshared(pthread_mutexattr_t *mutexAttr,
	int *_processShared);
extern int pthread_mutexattr_gettype(pthread_mutexattr_t *mutexAttr,
	int *_type);
extern int pthread_mutexattr_init(pthread_mutexattr_t *mutexAttr);
extern int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mutexAttr,
	int priorityCeiling);
extern int pthread_mutexattr_setprotocol(pthread_mutexattr_t *mutexAttr,
	int protocol);
extern int pthread_mutexattr_setpshared(pthread_mutexattr_t *mutexAttr,
	int processShared);
extern int pthread_mutexattr_settype(pthread_mutexattr_t *mutexAttr, int type);

/* condition variable functions */
extern int pthread_cond_destroy(pthread_cond_t *cond);
extern int pthread_cond_init(pthread_cond_t *cond,
	const pthread_condattr_t *attr);
extern int pthread_cond_broadcast(pthread_cond_t *cond);
extern int pthread_cond_signal(pthread_cond_t *cond);
extern int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
	const struct timespec *abstime);
extern int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);

/* condition variable attribute functions */
extern int pthread_condattr_destroy(pthread_condattr_t *condAttr);
extern int pthread_condattr_init(pthread_condattr_t *condAttr);
extern int pthread_condattr_getpshared(const pthread_condattr_t *condAttr,
	int *processShared);
extern int pthread_condattr_setpshared(pthread_condattr_t *condAttr,
	int processShared);

/* rwlock functions */
extern int pthread_rwlock_init(pthread_rwlock_t *lock,
	const pthread_rwlockattr_t *attr);
extern int pthread_rwlock_destroy(pthread_rwlock_t *lock);
extern int pthread_rwlock_rdlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_tryrdlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_timedrdlock(pthread_rwlock_t *lock,
	const struct timespec *timeout);
extern int pthread_rwlock_wrlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_trywrlock(pthread_rwlock_t *lock);
extern int pthread_rwlock_timedwrlock(pthread_rwlock_t *lock,
	const struct timespec *timeout);
extern int pthread_rwlock_unlock(pthread_rwlock_t *lock);

/* rwlock attribute functions */
extern int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
extern int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
extern int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr,
	int *shared);
extern int pthread_rwlockattr_setpshared(pthread_rwlockattr_t *attr,
	int shared);

/* misc. functions */
extern int pthread_atfork(void (*prepare)(void), void (*parent)(void),
	void (*child)(void));
extern int pthread_once(pthread_once_t *once_control,
	void (*init_routine)(void));

/* thread attributes functions */
extern int pthread_attr_destroy(pthread_attr_t *attr);
extern int pthread_attr_init(pthread_attr_t *attr);
extern int pthread_attr_getdetachstate(const pthread_attr_t *attr,
	int *detachstate);
extern int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
extern int pthread_attr_getstacksize(const pthread_attr_t *attr,
	size_t *stacksize);
extern int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
extern int pthread_attr_getscope(const pthread_attr_t *attr,
	int *contentionScope);
extern int pthread_attr_setscope(pthread_attr_t *attr, int contentionScope);

#if 0	/* Unimplemented attribute functions: */

/* mandatory! */
extern int pthread_attr_getschedparam(const pthread_attr_t *attr,
	struct sched_param *param);
extern int pthread_attr_setschedparam(pthread_attr_t *attr,
	const struct sched_param *param);

/* [TPS] */
extern int pthread_attr_getinheritsched(const pthread_attr_t *attr,
	int *inheritsched);
extern int pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched);

extern int pthread_attr_getschedpolicy(const pthread_attr_t *attr,
	int *policy);
extern int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);

/* [XSI] */
extern int pthread_attr_getguardsize(const pthread_attr_t *attr,
	size_t *guardsize);
extern int pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize);

/* [TSA] */
extern int pthread_attr_getstackaddr(const pthread_attr_t *attr,
	void **stackaddr);
extern int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr);

/* [TSA TSS] */
extern int pthread_attr_getstack(const pthread_attr_t *attr,
	void **stackaddr, size_t *stacksize);
extern int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize);

#endif	/* 0 */


/* thread functions */
extern int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
	void *(*start_routine)(void*), void *arg);
extern int pthread_detach(pthread_t thread);
extern int pthread_equal(pthread_t t1, pthread_t t2);
extern void pthread_exit(void *value_ptr);
extern int pthread_join(pthread_t thread, void **_value);
extern pthread_t pthread_self(void);
extern int pthread_kill(pthread_t thread, int sig);
extern int pthread_getconcurrency(void);
extern int pthread_setconcurrency(int newLevel);

extern int pthread_cancel(pthread_t thread);
extern int pthread_setcancelstate(int state, int *_oldState);
extern int pthread_setcanceltype(int type, int *_oldType);
extern void pthread_testcancel(void);

/* thread specific data functions */
extern int pthread_key_create(pthread_key_t *key,
	void (*destructorFunc)(void*));
extern int pthread_key_delete(pthread_key_t key);
extern void *pthread_getspecific(pthread_key_t key);
extern int pthread_setspecific(pthread_key_t key, const void *value);

/* private functions */
extern void __pthread_cleanup_push_handler(
	struct __pthread_cleanup_handler *handler);
extern struct __pthread_cleanup_handler *__pthread_cleanup_pop_handler(void);

#ifdef __cplusplus
}
#endif

#endif	/* _PTHREAD_ */