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score: Add _Chain_Append_if_is_off_chain_*()

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This commit is contained in:
Sebastian Huber
2012-12-05 18:07:04 +01:00
parent 038bc6e775
commit 0d66dd77d1
1 changed files with 19 additions and 0 deletions
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cpukit/score/inline/rtems/score/chain.inl
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@@ -538,6 +538,25 @@ RTEMS_INLINE_ROUTINE void _Chain_Append_unprotected(
the_node->previous = old_last;
}
/**
* @brief Append a node on the end of a chain if the node is in the off chain
* state (unprotected).
*
* @note It does NOT disable interrupts to ensure the atomicity of the
* append operation.
*
* @see _Chain_Append_unprotected() and _Chain_Is_node_off_chain().
*/
RTEMS_INLINE_ROUTINE void _Chain_Append_if_is_off_chain_unprotected(
Chain_Control *the_chain,
Chain_Node *the_node
)
{
if ( _Chain_Is_node_off_chain( the_node ) ) {
_Chain_Append_unprotected( the_chain, the_node );
}
}
/** @brief Prepend a Node (unprotected)
*
* This routine prepends the_node onto the front of the_chain.