[rtems commit] score: Use only next field for chain on/off
Sebastian Huber
sebh at rtems.org
Mon Mar 17 08:10:34 UTC 2014
Module: rtems
Branch: master
Commit: d6da1b1ef4bf83faa6cc15d3ca7bf0c8b8e80508
Changeset: http://git.rtems.org/rtems/commit/?id=d6da1b1ef4bf83faa6cc15d3ca7bf0c8b8e80508
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Mar 14 13:55:00 2014 +0100
score: Use only next field for chain on/off
It is sufficient to use one field for the chain on/off indication. The
chain API functions are highly performance critical.
---
cpukit/score/include/rtems/score/chainimpl.h | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/cpukit/score/include/rtems/score/chainimpl.h b/cpukit/score/include/rtems/score/chainimpl.h
index 98416b2..1a7ee5d 100644
--- a/cpukit/score/include/rtems/score/chainimpl.h
+++ b/cpukit/score/include/rtems/score/chainimpl.h
@@ -221,8 +221,8 @@ size_t _Chain_Node_count_unprotected( const Chain_Control *chain );
/**
* @brief Set off chain.
*
- * This function sets the next and previous fields of the @a node to NULL
- * indicating the @a node is not part of a chain.
+ * This function sets the next field of the @a node to NULL indicating the @a
+ * node is not part of a chain.
*
* @param[in] node the node set to off chain.
*/
@@ -230,14 +230,14 @@ RTEMS_INLINE_ROUTINE void _Chain_Set_off_chain(
Chain_Node *node
)
{
- node->next = node->previous = NULL;
+ node->next = NULL;
}
/**
* @brief Is the node off chain.
*
- * This function returns true if the @a node is not on a chain. A @a node is
- * off chain if the next and previous fields are set to NULL.
+ * This function returns true if the @a node is not on a chain. A @a node is
+ * off chain if the next field is set to NULL.
*
* @param[in] node is the node off chain.
*
@@ -248,7 +248,7 @@ RTEMS_INLINE_ROUTINE bool _Chain_Is_node_off_chain(
const Chain_Node *node
)
{
- return (node->next == NULL) && (node->previous == NULL);
+ return node->next == NULL;
}
/**
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