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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreThread
*
* @brief This source file contains the implementation of
* _Thread_Do_unpin().
*/
/*
* Copyright (c) 2018 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/score/schedulerimpl.h>
void _Thread_Do_unpin( Thread_Control *executing, Per_CPU_Control *cpu_self )
{
ISR_lock_Context state_lock_context;
ISR_lock_Context scheduler_lock_context;
Scheduler_Node *pinned_node;
const Scheduler_Control *pinned_scheduler;
Scheduler_Node *home_node;
const Scheduler_Control *home_scheduler;
const Scheduler_Control *scheduler;
_Thread_State_acquire( executing, &state_lock_context );
executing->Scheduler.pin_level = 0;
pinned_node = SCHEDULER_NODE_OF_THREAD_SCHEDULER_NODE(
_Chain_First( &executing->Scheduler.Scheduler_nodes )
);
pinned_scheduler = _Scheduler_Node_get_scheduler( pinned_node );
home_node = _Thread_Scheduler_get_home_node( executing );
home_scheduler = _Thread_Scheduler_get_home( executing );
scheduler = pinned_scheduler;
executing->Scheduler.pinned_scheduler = NULL;
_Scheduler_Acquire_critical( scheduler, &scheduler_lock_context );
if ( _Thread_Is_ready( executing ) ) {
( *scheduler->Operations.block )( scheduler, executing, pinned_node );
}
( *scheduler->Operations.unpin )(
scheduler,
executing,
pinned_node,
cpu_self
);
if ( home_node != pinned_node ) {
_Scheduler_Release_critical( scheduler, &scheduler_lock_context );
_Chain_Extract_unprotected( &home_node->Thread.Scheduler_node.Chain );
_Chain_Prepend_unprotected(
&executing->Scheduler.Scheduler_nodes,
&home_node->Thread.Scheduler_node.Chain
);
scheduler = home_scheduler;
_Scheduler_Acquire_critical( scheduler, &scheduler_lock_context );
}
if ( _Thread_Is_ready( executing ) ) {
( *scheduler->Operations.unblock )( scheduler, executing, home_node );
}
_Scheduler_Release_critical( scheduler, &scheduler_lock_context );
_Thread_State_release( executing, &state_lock_context );
}
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