score/src/threadgetcputimeused.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreThread
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _Thread_Get_CPU_time_used() and _Thread_Get_CPU_time_used_locked().
0010  */
0011
0012 /*
0013  * Copyright (c) 2016 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/score/threadimpl.h>
0042 #include <rtems/score/schedulerimpl.h>
0043
0044 static bool _Thread_Is_scheduled( const Thread_Control *the_thread )
0045 {
0046 #if defined(RTEMS_SMP)
0047   return the_thread->Scheduler.state == THREAD_SCHEDULER_SCHEDULED;
0048 #else
0049   return _Thread_Is_executing( the_thread );
0050 #endif
0051 }
0052
0053 Timestamp_Control _Thread_Get_CPU_time_used_locked(
0054   Thread_Control *the_thread
0055 )
0056 {
0057   _Assert( _Thread_State_is_owner( the_thread ) );
0058   _Assert(
0059     _ISR_lock_Is_owner(
0060       &_Scheduler_Get_context( _Thread_Scheduler_get_home( the_thread ) )->Lock
0061     )
0062   );
0063
0064   if ( _Thread_Is_scheduled( the_thread ) ) {
0065     _Thread_Update_CPU_time_used( the_thread, _Thread_Get_CPU( the_thread ) );
0066   }
0067
0068   return the_thread->cpu_time_used;
0069 }
0070
0071 Timestamp_Control _Thread_Get_CPU_time_used( Thread_Control *the_thread )
0072 {
0073   const Scheduler_Control *scheduler;
0074   ISR_lock_Context         state_lock_context;
0075   ISR_lock_Context         scheduler_lock_context;
0076   Timestamp_Control        cpu_time_used;
0077
0078   _Thread_State_acquire( the_thread, &state_lock_context );
0079   scheduler = _Thread_Scheduler_get_home( the_thread );
0080   _Scheduler_Acquire_critical( scheduler, &scheduler_lock_context );
0081
0082   cpu_time_used = _Thread_Get_CPU_time_used_locked( the_thread );
0083
0084   _Scheduler_Release_critical( scheduler, &scheduler_lock_context );
0085   _Thread_State_release( the_thread, &state_lock_context );
0086
0087   return cpu_time_used;
0088 }