[PATCH urcu] cds_lfht_is_node_deleted parameter can be marked const

[PATCH urcu] cds_lfht_is_node_deleted parameter can be marked const

[Jérémie Galarneau]

Mark the cds_lfht_node pointer parameter of cds_lfht_is_node_deleted
as const. The fact that this parameter is mutable makes it harder to
use liburcu in const-correct code.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---
 include/urcu/rculfhash.h | 2 +-
 src/rculfhash.c          | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/urcu/rculfhash.h b/include/urcu/rculfhash.h
index cbf513e..20b822f 100644
--- a/include/urcu/rculfhash.h
+++ b/include/urcu/rculfhash.h
@@ -499,7 +499,7 @@ int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node *node);
  * This function does not issue any memory barrier.
  */
 extern
-int cds_lfht_is_node_deleted(struct cds_lfht_node *node);
+int cds_lfht_is_node_deleted(const struct cds_lfht_node *node);
 
 /*
  * cds_lfht_resize - Force a hash table resize
diff --git a/src/rculfhash.c b/src/rculfhash.c
index ff42df0..8e60f19 100644
--- a/src/rculfhash.c
+++ b/src/rculfhash.c
@@ -825,7 +825,7 @@ struct cds_lfht_node *clear_flag(struct cds_lfht_node *node)
 }
 
 static
-int is_removed(struct cds_lfht_node *node)
+int is_removed(const struct cds_lfht_node *node)
 {
 	return ((unsigned long) node) & REMOVED_FLAG;
 }
@@ -1829,7 +1829,7 @@ int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node *node)
 	return ret;
 }
 
-int cds_lfht_is_node_deleted(struct cds_lfht_node *node)
+int cds_lfht_is_node_deleted(const struct cds_lfht_node *node)
 {
 	return is_removed(CMM_LOAD_SHARED(node->next));
 }
-- 
2.23.0

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Re: [PATCH urcu] cds_lfht_is_node_deleted parameter can be marked const

[Mathieu Desnoyers]

Merged into liburcu master, thanks!

Mathieu

----- On Oct 28, 2019, at 3:24 PM, Jeremie Galarneau jeremie.galarneau@efficios.com wrote:

> Mark the cds_lfht_node pointer parameter of cds_lfht_is_node_deleted
> as const. The fact that this parameter is mutable makes it harder to
> use liburcu in const-correct code.
> 
> Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
> ---
> include/urcu/rculfhash.h | 2 +-
> src/rculfhash.c          | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/include/urcu/rculfhash.h b/include/urcu/rculfhash.h
> index cbf513e..20b822f 100644
> --- a/include/urcu/rculfhash.h
> +++ b/include/urcu/rculfhash.h
> @@ -499,7 +499,7 @@ int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node
> *node);
>  * This function does not issue any memory barrier.
>  */
> extern
> -int cds_lfht_is_node_deleted(struct cds_lfht_node *node);
> +int cds_lfht_is_node_deleted(const struct cds_lfht_node *node);
> 
> /*
>  * cds_lfht_resize - Force a hash table resize
> diff --git a/src/rculfhash.c b/src/rculfhash.c
> index ff42df0..8e60f19 100644
> --- a/src/rculfhash.c
> +++ b/src/rculfhash.c
> @@ -825,7 +825,7 @@ struct cds_lfht_node *clear_flag(struct cds_lfht_node *node)
> }
> 
> static
> -int is_removed(struct cds_lfht_node *node)
> +int is_removed(const struct cds_lfht_node *node)
> {
> 	return ((unsigned long) node) & REMOVED_FLAG;
> }
> @@ -1829,7 +1829,7 @@ int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node
> *node)
> 	return ret;
> }
> 
> -int cds_lfht_is_node_deleted(struct cds_lfht_node *node)
> +int cds_lfht_is_node_deleted(const struct cds_lfht_node *node)
> {
> 	return is_removed(CMM_LOAD_SHARED(node->next));
> }
> --
> 2.23.0

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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