diff options
Diffstat (limited to 'cpukit/score/src/schedulersmp.c')
| -rw-r--r-- | cpukit/score/src/schedulersmp.c | 56 |
1 files changed, 34 insertions, 22 deletions
diff --git a/cpukit/score/src/schedulersmp.c b/cpukit/score/src/schedulersmp.c index cc566180b7..e26caac3e3 100644 --- a/cpukit/score/src/schedulersmp.c +++ b/cpukit/score/src/schedulersmp.c @@ -1,3 +1,5 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + /** * @file * @@ -8,11 +10,28 @@ */ /* - * Copyright (c) 2014, 2017 embedded brains GmbH. + * Copyright (C) 2014, 2017 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. * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. + * 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 @@ -21,28 +40,21 @@ #include <rtems/score/schedulersmpimpl.h> -void _Scheduler_Request_ask_for_help( Thread_Control *the_thread ) +void _Scheduler_SMP_Remove_ask_for_help_from_processor( + Thread_Control *thread, + Per_CPU_Control *cpu +) { - ISR_lock_Context scheduler_lock_context; - - _Thread_Scheduler_acquire_critical( the_thread, &scheduler_lock_context ); - - if ( _Chain_Is_node_off_chain( &the_thread->Scheduler.Help_node ) ) { - Per_CPU_Control *cpu; - ISR_lock_Context per_cpu_lock_context; - - cpu = _Thread_Get_CPU( the_thread ); - _Per_CPU_Acquire( cpu, &per_cpu_lock_context ); + ISR_lock_Context lock_context; - _Chain_Append_unprotected( - &cpu->Threads_in_need_for_help, - &the_thread->Scheduler.Help_node - ); + _Assert( _ISR_lock_Is_owner( &thread->Scheduler.Lock ) ); - _Per_CPU_Release( cpu, &per_cpu_lock_context ); + _Per_CPU_Acquire( cpu, &lock_context ); - _Thread_Dispatch_request( _Per_CPU_Get(), cpu ); + if ( thread->Scheduler.ask_for_help_cpu == cpu ) { + _Chain_Extract_unprotected( &thread->Scheduler.Help_node ); + thread->Scheduler.ask_for_help_cpu = NULL; } - _Thread_Scheduler_release_critical( the_thread, &scheduler_lock_context ); + _Per_CPU_Release( cpu, &lock_context ); } |