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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSAPIClassicChains
*
* @brief This source file contains the implementation of rtems_chain_append(),
* rtems_chain_append_with_empty_check(), rtems_chain_extract(),
* rtems_chain_get(), rtems_chain_get_with_empty_check(),
* rtems_chain_insert(), rtems_chain_prepend(), and
* rtems_chain_prepend_with_empty_check().
*/
/*
* Copyright (C) 2013, 2016 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/chain.h>
#include <rtems/rtems/intr.h>
RTEMS_INTERRUPT_LOCK_DEFINE( static, chain_lock, "Chains" )
static void chain_acquire( rtems_interrupt_lock_context *lock_context )
{
rtems_interrupt_lock_acquire( &chain_lock, lock_context );
}
static void chain_release( rtems_interrupt_lock_context *lock_context )
{
rtems_interrupt_lock_release( &chain_lock, lock_context );
}
void rtems_chain_extract( rtems_chain_node *node )
{
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
_Chain_Extract_unprotected( node );
chain_release( &lock_context );
}
rtems_chain_node *rtems_chain_get( rtems_chain_control *chain )
{
rtems_chain_node *node;
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
node = _Chain_Get_unprotected( chain );
chain_release( &lock_context );
return node;
}
void rtems_chain_insert( rtems_chain_node *after_node, rtems_chain_node *node )
{
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
_Chain_Insert_unprotected( after_node, node );
chain_release( &lock_context );
}
void rtems_chain_append(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
_Chain_Append_unprotected( chain, node );
chain_release( &lock_context );
}
void rtems_chain_prepend(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
_Chain_Prepend_unprotected( chain, node );
chain_release( &lock_context );
}
bool rtems_chain_append_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
bool was_empty;
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
was_empty = _Chain_Append_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return was_empty;
}
bool rtems_chain_prepend_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
bool was_empty;
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
was_empty = _Chain_Prepend_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return was_empty;
}
bool rtems_chain_get_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node **node
)
{
bool is_empty_now;
rtems_interrupt_lock_context lock_context;
chain_acquire( &lock_context );
is_empty_now = _Chain_Get_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return is_empty_now;
}
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