X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Fwfstack-static.h;fp=urcu%2Fwfstack-static.h;h=0000000000000000000000000000000000000000;hb=af7c2dbeac32c663b64ad05e4eca70e18784463b;hp=ff18c4a3f213214188ef6bfe6f6c98a795132bab;hpb=acfd099eae9026369f558e73b2a7e35860962d9d;p=urcu.git

diff --git a/urcu/wfstack-static.h b/urcu/wfstack-static.h
deleted file mode 100644
index ff18c4a..0000000
--- a/urcu/wfstack-static.h
+++ /dev/null
@@ -1,121 +0,0 @@
-#ifndef _URCU_WFSTACK_STATIC_H
-#define _URCU_WFSTACK_STATIC_H
-
-/*
- * wfstack-static.h
- *
- * Userspace RCU library - Stack with Wait-Free push, Blocking pop.
- *
- * TO BE INCLUDED ONLY IN LGPL-COMPATIBLE CODE. See wfstack.h for linking
- * dynamically with the userspace rcu library.
- *
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <pthread.h>
-#include <assert.h>
-#include <poll.h>
-#include <urcu/compiler.h>
-#include <urcu/uatomic_arch.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define CDS_WF_STACK_END			((void *)0x1UL)
-#define CDS_WFS_ADAPT_ATTEMPTS		10	/* Retry if being set */
-#define CDS_WFS_WAIT			10	/* Wait 10 ms if being set */
-
-void _cds_wfs_node_init(struct cds_wfs_node *node)
-{
-	node->next = NULL;
-}
-
-void _cds_wfs_init(struct cds_wfs_stack *s)
-{
-	int ret;
-
-	s->head = CDS_WF_STACK_END;
-	ret = pthread_mutex_init(&s->lock, NULL);
-	assert(!ret);
-}
-
-void _cds_wfs_push(struct cds_wfs_stack *s, struct cds_wfs_node *node)
-{
-	struct cds_wfs_node *old_head;
-
-	assert(node->next == NULL);
-	/*
-	 * uatomic_xchg() implicit memory barrier orders earlier stores to node
-	 * (setting it to NULL) before publication.
-	 */
-	old_head = uatomic_xchg(&s->head, node);
-	/*
-	 * At this point, dequeuers see a NULL node->next, they should busy-wait
-	 * until node->next is set to old_head.
-	 */
-	CMM_STORE_SHARED(node->next, old_head);
-}
-
-/*
- * Returns NULL if stack is empty.
- */
-struct cds_wfs_node *
-___cds_wfs_pop_blocking(struct cds_wfs_stack *s)
-{
-	struct cds_wfs_node *head, *next;
-	int attempt = 0;
-
-retry:
-	head = CMM_LOAD_SHARED(s->head);
-	if (head == CDS_WF_STACK_END)
-		return NULL;
-	/*
-	 * Adaptative busy-looping waiting for push to complete.
-	 */
-	while ((next = CMM_LOAD_SHARED(head->next)) == NULL) {
-		if (++attempt >= CDS_WFS_ADAPT_ATTEMPTS) {
-			poll(NULL, 0, CDS_WFS_WAIT);	/* Wait for 10ms */
-			attempt = 0;
-		} else
-			caa_cpu_relax();
-	}
-	if (uatomic_cmpxchg(&s->head, head, next) == head)
-		return head;
-	else
-		goto retry;		/* Concurrent modification. Retry. */
-}
-
-struct cds_wfs_node *
-_cds_wfs_pop_blocking(struct cds_wfs_stack *s)
-{
-	struct cds_wfs_node *retnode;
-	int ret;
-
-	ret = pthread_mutex_lock(&s->lock);
-	assert(!ret);
-	retnode = ___cds_wfs_pop_blocking(s);
-	ret = pthread_mutex_unlock(&s->lock);
-	assert(!ret);
-	return retnode;
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _URCU_WFSTACK_STATIC_H */