/* * RTLinux POSIX spinlock implementation * * Written by Michael Barabanov * Copyright (C) Finite State Machine Labs Inc., 1999 * Released under the terms of the GPL Version 2 * */#ifndef __RTL_SPINLOCK_H__#define __RTL_SPINLOCK_H__#include <rtl_sync.h>#include <linux/errno.h>typedef struct {	spinlock_t lock;	rtl_irqstate_t flags;} pthread_spinlock_t;#define PTHREAD_SPINLOCK_INITIALIZER { SPIN_LOCK_UNLOCKED, 0 }static inline int pthread_spin_init(pthread_spinlock_t *lock, int pshared){	spin_lock_init(&lock->lock);	return 0;}static inline int pthread_spin_destroy(pthread_spinlock_t *lock){	return 0;}static inline int pthread_spin_lock(pthread_spinlock_t *lock){	rtl_irqstate_t flags;	rtl_no_interrupts (flags);	spin_lock (&lock->lock);	lock->flags = flags;	return 0;}static inline int pthread_spin_trylock(pthread_spinlock_t *lock){	rtl_irqstate_t flags;	rtl_no_interrupts (flags);	if (rtl_spin_trylock(&lock->lock)) {		rtl_restore_interrupts (flags);		return EBUSY;	} else {		lock->flags = flags;		return 0;	}}static inline int pthread_spin_unlock(pthread_spinlock_t *lock){	rtl_irqstate_t flags;	flags = lock->flags;	rtl_spin_unlock(&lock->lock);	rtl_restore_interrupts (flags);	return 0;}#endif