X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Frculfstack.h;h=7d359d4ce34ce7dc5a02cfd0c3207f1ec9c1d720;hp=8cf7d13b35cc09ffc79f6646dd9c0d2c75b3e9b5;hb=6e5f88cf94a225b155719046d87bfd32ba47e06a;hpb=c97740a3b28836ade49d266e0ef1420f348b0b7d

diff --git a/urcu/rculfstack.h b/urcu/rculfstack.h
index 8cf7d13..7d359d4 100644
--- a/urcu/rculfstack.h
+++ b/urcu/rculfstack.h
@@ -27,81 +27,60 @@
 extern "C" {
 #endif
 
-#if (!defined(_GNU_SOURCE) && !defined(_LGPL_SOURCE))
-#error "Dynamic loader LGPL wrappers not implemented yet"
-#endif
-
-struct rcu_lfs_node {
-	struct rcu_lfs_node *next;
+struct cds_lfs_node_rcu {
+	struct cds_lfs_node_rcu *next;
 };
 
-struct rcu_lfs_stack {
-	struct rcu_lfs_node *head;
+struct cds_lfs_stack_rcu {
+	struct cds_lfs_node_rcu *head;
 };
 
-void rcu_lfs_node_init(struct rcu_lfs_node *node)
-{
-}
+#ifdef _LGPL_SOURCE
 
-void rcu_lfs_init(struct rcu_lfs_stack *s)
-{
-	s->head = NULL;
-}
+#include <urcu/static/rculfstack.h>
 
-void rcu_lfs_push(struct rcu_lfs_stack *s, struct rcu_lfs_node *node)
-{
-	for (;;) {
-		struct rcu_lfs_node *head;
-
-		rcu_read_lock();
-		head = rcu_dereference(s->head);
-		node->next = head;
-		/*
-		 * uatomic_cmpxchg() implicit memory barrier orders earlier
-		 * stores to node before publication.
-		 */
-		if (uatomic_cmpxchg(&s->head, head, node) == head) {
-			rcu_read_unlock();
-			return;
-		} else {
-			/* Failure to prepend. Retry. */
-			rcu_read_unlock();
-			continue;
-		}
-	}
-}
+#define cds_lfs_node_init_rcu_qsbr	_cds_lfs_node_init_rcu
+#define cds_lfs_init_rcu_qsbr		_cds_lfs_init_rcu
+#define cds_lfs_push_rcu_qsbr		_cds_lfs_push_rcu
+#define cds_lfs_pop_rcu_qsbr		_cds_lfs_pop_rcu
+
+#define cds_lfs_node_init_rcu_bp	_cds_lfs_node_init_rcu
+#define cds_lfs_init_rcu_bp		_cds_lfs_init_rcu
+#define cds_lfs_push_rcu_bp		_cds_lfs_push_rcu
+#define cds_lfs_pop_rcu_bp		_cds_lfs_pop_rcu
+
+#define cds_lfs_node_init_rcu_memb	_cds_lfs_node_init_rcu
+#define cds_lfs_init_rcu_memb		_cds_lfs_init_rcu
+#define cds_lfs_push_rcu_memb		_cds_lfs_push_rcu
+#define cds_lfs_pop_rcu_memb		_cds_lfs_pop_rcu
+
+#define cds_lfs_node_init_rcu_mb	_cds_lfs_node_init_rcu
+#define cds_lfs_init_rcu_mb		_cds_lfs_init_rcu
+#define cds_lfs_push_rcu_mb		_cds_lfs_push_rcu
+#define cds_lfs_pop_rcu_mb		_cds_lfs_pop_rcu
+
+#define cds_lfs_node_init_rcu_sig	_cds_lfs_node_init_rcu
+#define cds_lfs_init_rcu_sig		_cds_lfs_init_rcu
+#define cds_lfs_push_rcu_sig		_cds_lfs_push_rcu
+#define cds_lfs_pop_rcu_sig		_cds_lfs_pop_rcu
+
+#else /* !_LGPL_SOURCE */
+
+extern void cds_lfs_node_init_rcu(struct cds_lfs_node_rcu *node);
+extern void cds_lfs_init_rcu(struct cds_lfs_stack_rcu *s);
+extern int cds_lfs_push_rcu(struct cds_lfs_stack_rcu *s,
+			struct cds_lfs_node_rcu *node);
 
 /*
+ * Should be called under rcu read lock critical section.
+ *
  * The caller must wait for a grace period to pass before freeing the returned
- * node or modifying the rcu_lfs_node structure.
+ * node or modifying the cds_lfs_node_rcu structure.
  * Returns NULL if stack is empty.
  */
-struct rcu_lfs_node *
-rcu_lfs_pop(struct rcu_lfs_stack *s)
-{
-	for (;;) {
-		struct rcu_lfs_node *head;
-
-		rcu_read_lock();
-		head = rcu_dereference(s->head);
-		if (head) {
-			struct rcu_lfs_node *next = rcu_dereference(head->next);
-
-			if (uatomic_cmpxchg(&s->head, head, next) == head) {
-				rcu_read_unlock();
-				return head;
-			} else {
-				/* Concurrent modification. Retry. */
-				rcu_read_unlock();
-				continue;
-			}
-		} else {
-			/* Empty stack */
-			rcu_read_unlock();
-			return NULL;
-		}
-	}
-}
+extern struct cds_lfs_node_rcu *cds_lfs_pop_rcu(struct cds_lfs_stack_rcu *s);
+
+#endif /* !_LGPL_SOURCE */
 
 #ifdef __cplusplus
 }