From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sat, 9 Jul 2011 19:04:40 +0000 (-0400)
Subject: rculfhash: introduce REMOVED_FLAG and FLAG_MASK
X-Git-Tag: v0.7.0~43^2~205
X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=commitdiff_plain;h=d37166c6086a55443a65997f9aa3f0a61db8638b

rculfhash: introduce REMOVED_FLAG and FLAG_MASK

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/rculfhash.c b/rculfhash.c
index 3120d45..2ec91f2 100644
--- a/rculfhash.c
+++ b/rculfhash.c
@@ -53,6 +53,9 @@
 #define max(a, b)	((a) > (b) ? (a) : (b))
 #endif
 
+#define REMOVED_FLAG		(1UL << 0)
+#define FLAGS_MASK		((1UL << 1) - 1)
+
 struct rcu_table {
 	unsigned long size;	/* always a power of 2 */
 	unsigned long resize_target;
@@ -176,19 +179,19 @@ void check_resize(struct rcu_ht *ht, struct rcu_table *t,
 static
 struct rcu_ht_node *clear_flag(struct rcu_ht_node *node)
 {
-	return (struct rcu_ht_node *) (((unsigned long) node) & ~0x1);
+	return (struct rcu_ht_node *) (((unsigned long) node) & ~FLAGS_MASK);
 }
 
 static
 int is_removed(struct rcu_ht_node *node)
 {
-	return ((unsigned long) node) & 0x1;
+	return ((unsigned long) node) & REMOVED_FLAG;
 }
 
 static
 struct rcu_ht_node *flag_removed(struct rcu_ht_node *node)
 {
-	return (struct rcu_ht_node *) (((unsigned long) node) | 0x1);
+	return (struct rcu_ht_node *) (((unsigned long) node) | REMOVED_FLAG);
 }
 
 static