1 files changed, 0 insertions, 335 deletions
diff --git a/lib/libpthread/thread/thr_rwlock.c b/lib/libpthread/thread/thr_rwlock.c
deleted file mode 100644
index f398a1857d4a..000000000000
--- a/lib/libpthread/thread/thr_rwlock.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/*-
- * Copyright (c) 1998 Alex Nash
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	$Id: uthread_rwlock.c,v 1.2 1998/09/07 19:23:55 alex Exp $
- */
-
-#ifdef _THREAD_SAFE
-#include <errno.h>
-#include <limits.h>
-#include <stdlib.h>
-
-#include <pthread.h>
-#include "pthread_private.h"
-
-/* maximum number of times a read lock may be obtained */
-#define	MAX_READ_LOCKS		(INT_MAX - 1)
-
-static int init_static (pthread_rwlock_t *rwlock);
-
-static spinlock_t static_init_lock = _SPINLOCK_INITIALIZER;
-
-static int
-init_static (pthread_rwlock_t *rwlock)
-{
-	int ret;
-
-	_SPINLOCK(&static_init_lock);
-
-	if (*rwlock == NULL)
-		ret = pthread_rwlock_init(rwlock, NULL);
-	else
-		ret = 0;
-
-	_SPINUNLOCK(&static_init_lock);
-
-	return(ret);
-}
-
-int
-pthread_rwlock_destroy (pthread_rwlock_t *rwlock)
-{
-	int ret;
-
-	if (rwlock == NULL)
-		ret = EINVAL;
-	else {
-		pthread_rwlock_t prwlock;
-
-		prwlock = *rwlock;
-
-		pthread_mutex_destroy(&prwlock->lock);
-		pthread_cond_destroy(&prwlock->read_signal);
-		pthread_cond_destroy(&prwlock->write_signal);
-		free(prwlock);
-
-		*rwlock = NULL;
-
-		ret = 0;
-	}
-
-	return(ret);
-}
-
-int
-pthread_rwlock_init (pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr)
-{
-	pthread_rwlock_t	prwlock;
-	int			ret;
-
-	/* allocate rwlock object */
-	prwlock = (pthread_rwlock_t)malloc(sizeof(struct pthread_rwlock));
-
-	if (prwlock == NULL)
-		return(ENOMEM);
-
-	/* initialize the lock */
-	if ((ret = pthread_mutex_init(&prwlock->lock, NULL)) != 0)
-		free(prwlock);
-	else {
-		/* initialize the read condition signal */
-		ret = pthread_cond_init(&prwlock->read_signal, NULL);
-
-		if (ret != 0) {
-			pthread_mutex_destroy(&prwlock->lock);
-			free(prwlock);
-		} else {
-			/* initialize the write condition signal */
-			ret = pthread_cond_init(&prwlock->write_signal, NULL);
-
-			if (ret != 0) {
-				pthread_cond_destroy(&prwlock->read_signal);
-				pthread_mutex_destroy(&prwlock->lock);
-				free(prwlock);
-			} else {
-				/* success */
-				prwlock->state		 = 0;
-				prwlock->blocked_writers = 0;
-
-				*rwlock = prwlock;
-			}
-		}
-	}
-
-	return(ret);
-}
-
-int
-pthread_rwlock_rdlock (pthread_rwlock_t *rwlock)
-{
-	pthread_rwlock_t 	prwlock;
-	int			ret;
-
-	if (rwlock == NULL)
-		return(EINVAL);
-
-	prwlock = *rwlock;
-
-	/* check for static initialization */
-	if (prwlock == NULL) {
-		if ((ret = init_static(rwlock)) != 0)
-			return(ret);
-
-		prwlock = *rwlock;
-	}
-
-	/* grab the monitor lock */
-	if ((ret = pthread_mutex_lock(&prwlock->lock)) != 0)
-		return(ret);
-
-	/* give writers priority over readers */
-	while (prwlock->blocked_writers || prwlock->state < 0) {
-		ret = pthread_cond_wait(&prwlock->read_signal, &prwlock->lock);
-
-		if (ret != 0) {
-			/* can't do a whole lot if this fails */
-			pthread_mutex_unlock(&prwlock->lock);
-			return(ret);
-		}
-	}
-
-	/* check lock count */
-	if (prwlock->state == MAX_READ_LOCKS)
-		ret = EAGAIN;
-	else
-		++prwlock->state; /* indicate we are locked for reading */
-
-	/*
-	 * Something is really wrong if this call fails.  Returning
-	 * error won't do because we've already obtained the read
-	 * lock.  Decrementing 'state' is no good because we probably
-	 * don't have the monitor lock.
-	 */
-	pthread_mutex_unlock(&prwlock->lock);
-
-	return(ret);
-}
-
-int
-pthread_rwlock_tryrdlock (pthread_rwlock_t *rwlock)
-{
-	pthread_rwlock_t 	prwlock;
-	int			ret;
-
-	if (rwlock == NULL)
-		return(EINVAL);
-
-	prwlock = *rwlock;
-
-	/* check for static initialization */
-	if (prwlock == NULL) {
-		if ((ret = init_static(rwlock)) != 0)
-			return(ret);
-
-		prwlock = *rwlock;
-	}
-
-	/* grab the monitor lock */
-	if ((ret = pthread_mutex_lock(&prwlock->lock)) != 0)
-		return(ret);
-
-	/* give writers priority over readers */
-	if (prwlock->blocked_writers || prwlock->state < 0)
-		ret = EWOULDBLOCK;
-	else if (prwlock->state == MAX_READ_LOCKS)
-		ret = EAGAIN; /* too many read locks acquired */
-	else
-		++prwlock->state; /* indicate we are locked for reading */
-
-	/* see the comment on this in pthread_rwlock_rdlock */
-	pthread_mutex_unlock(&prwlock->lock);
-
-	return(ret);
-}
-
-int
-pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock)
-{
-	pthread_rwlock_t 	prwlock;
-	int			ret;
-
-	if (rwlock == NULL)
-		return(EINVAL);
-
-	prwlock = *rwlock;
-
-	/* check for static initialization */
-	if (prwlock == NULL) {
-		if ((ret = init_static(rwlock)) != 0)
-			return(ret);
-
-		prwlock = *rwlock;
-	}
-
-	/* grab the monitor lock */
-	if ((ret = pthread_mutex_lock(&prwlock->lock)) != 0)
-		return(ret);
-
-	if (prwlock->state != 0)
-		ret = EWOULDBLOCK;
-	else
-		/* indicate we are locked for writing */
-		prwlock->state = -1;
-
-	/* see the comment on this in pthread_rwlock_rdlock */
-	pthread_mutex_unlock(&prwlock->lock);
-
-	return(ret);
-}
-
-int
-pthread_rwlock_unlock (pthread_rwlock_t *rwlock)
-{
-	pthread_rwlock_t 	prwlock;
-	int			ret;
-
-	if (rwlock == NULL)
-		return(EINVAL);
-
-	prwlock = *rwlock;
-
-	if (prwlock == NULL)
-		return(EINVAL);
-
-	/* grab the monitor lock */
-	if ((ret = pthread_mutex_lock(&prwlock->lock)) != 0)
-		return(ret);
-
-	if (prwlock->state > 0) {
-		if (--prwlock->state == 0 && prwlock->blocked_writers)
-			ret = pthread_cond_signal(&prwlock->write_signal);
-	} else if (prwlock->state < 0) {
-		prwlock->state = 0;
-
-		if (prwlock->blocked_writers)
-			ret = pthread_cond_signal(&prwlock->write_signal);
-		else
-			ret = pthread_cond_broadcast(&prwlock->read_signal);
-	} else
-		ret = EINVAL;
-
-	/* see the comment on this in pthread_rwlock_rdlock */
-	pthread_mutex_unlock(&prwlock->lock);
-
-	return(ret);
-}
-
-int
-pthread_rwlock_wrlock (pthread_rwlock_t *rwlock)
-{
-	pthread_rwlock_t 	prwlock;
-	int			ret;
-
-	if (rwlock == NULL)
-		return(EINVAL);
-
-	prwlock = *rwlock;
-
-	/* check for static initialization */
-	if (prwlock == NULL) {
-		if ((ret = init_static(rwlock)) != 0)
-			return(ret);
-
-		prwlock = *rwlock;
-	}
-
-	/* grab the monitor lock */
-	if ((ret = pthread_mutex_lock(&prwlock->lock)) != 0)
-		return(ret);
-
-	while (prwlock->state != 0) {
-		++prwlock->blocked_writers;
-
-		ret = pthread_cond_wait(&prwlock->write_signal, &prwlock->lock);
-
-		if (ret != 0) {
-			--prwlock->blocked_writers;
-			pthread_mutex_unlock(&prwlock->lock);
-			return(ret);
-		}
-
-		--prwlock->blocked_writers;
-	}
-
-	/* indicate we are locked for writing */
-	prwlock->state = -1;
-
-	/* see the comment on this in pthread_rwlock_rdlock */
-	pthread_mutex_unlock(&prwlock->lock);
-
-	return(ret);
-}
-
-#endif /* _THREAD_SAFE */