diff options
Diffstat (limited to 'rtemsbsd/rtems/rtems-kernel-rwlockimpl.c')
| -rw-r--r-- | rtemsbsd/rtems/rtems-kernel-rwlockimpl.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/rtemsbsd/rtems/rtems-kernel-rwlockimpl.c b/rtemsbsd/rtems/rtems-kernel-rwlockimpl.c deleted file mode 100644 index 2434e51d..00000000 --- a/rtemsbsd/rtems/rtems-kernel-rwlockimpl.c +++ /dev/null @@ -1,177 +0,0 @@ -/** - * @file - * - * @ingroup rtems_bsd_rtems - * - * @brief TODO. - */ - -/* - * Copyright (c) 2017 embedded brains GmbH. All rights reserved. - * - * embedded brains GmbH - * Dornierstr. 4 - * 82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * 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 AUTHOR 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 AUTHOR 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. - */ - -#include <machine/rtems-bsd-kernel-space.h> -#include <machine/rtems-bsd-rwlockimpl.h> - -#include <rtems/score/schedulerimpl.h> - -void -rtems_bsd_rwlock_wlock_more(const struct lock_object *lock, - rtems_bsd_rwlock *rw, Thread_Control *executing, - rtems_bsd_rwlock_context *context) -{ - Thread_Control *wowner; - - wowner = rtems_bsd_rwlock_wowner(rw); - - if (wowner == executing) { - BSD_ASSERT(lock->lo_flags & LO_RECURSABLE); - ++rw->nest_level; - - _Thread_queue_Release(&rw->writer_queue, &context->writer); - } else { - _Thread_queue_Context_set_thread_state(&context->writer, - STATES_WAITING_FOR_RWLOCK); - _Thread_queue_Context_set_enqueue_do_nothing_extra( - &context->writer); - _Thread_queue_Context_set_deadlock_callout(&context->writer, - _Thread_queue_Deadlock_fatal); - _Thread_queue_Enqueue(&rw->writer_queue.Queue, - &_Thread_queue_Operations_priority, executing, - &context->writer); - } -} - -static Thread_Control * -rtems_bsd_rwlock_flush_reader_filter(Thread_Control *reader, - Thread_queue_Queue *queue, Thread_queue_Context *queue_context) -{ - rtems_bsd_rwlock *rw; - - rw = RTEMS_CONTAINER_OF(queue, rtems_bsd_rwlock, reader_queue.Queue); - ++rw->readers; - _Thread_Resource_count_increment(reader); - return (reader); -} - -static void -rtems_bsd_rwlock_flush_reader_post_release(Thread_queue_Queue *queue, - Thread_queue_Context *queue_context) -{ - rtems_bsd_rwlock *rw; - rtems_bsd_rwlock_context *context; - - rw = RTEMS_CONTAINER_OF(queue, rtems_bsd_rwlock, reader_queue.Queue); - context = RTEMS_CONTAINER_OF(queue_context, rtems_bsd_rwlock_context, - reader); - _Thread_queue_Release(&rw->writer_queue, &context->writer); -} - -void -rtems_bsd_rwlock_wunlock_more(rtems_bsd_rwlock *rw, Thread_Control *wowner, - rtems_bsd_rwlock_context *context) -{ - - if (!_Thread_queue_Is_empty(&rw->reader_queue.Queue)) { - BSD_ASSERT(rw->readers == 0); - rtems_bsd_rwlock_ready_waiting_readers(rw, context); - } else { - BSD_ASSERT(!_Thread_queue_Is_empty(&rw->writer_queue.Queue)); - _Thread_queue_Surrender(&rw->writer_queue.Queue, - rw->writer_queue.Queue.heads, wowner, &context->writer, - &_Thread_queue_Operations_priority); - } -} - -static void -rtems_bsd_rwlock_reader_enqueue(Thread_queue_Queue *queue, - Thread_Control *executing, Per_CPU_Control *cpu_self, - Thread_queue_Context *queue_context -) -{ - rtems_bsd_rwlock *rw; - rtems_bsd_rwlock_context *context; - - rw = RTEMS_CONTAINER_OF(queue, rtems_bsd_rwlock, reader_queue.Queue); - context = RTEMS_CONTAINER_OF(queue_context, rtems_bsd_rwlock_context, - reader); - _Thread_queue_Release(&rw->writer_queue, &context->writer); -} - -void -rtems_bsd_rwlock_rlock_more(rtems_bsd_rwlock *rw, - rtems_bsd_rwlock_context *context) -{ - Thread_Control *executing; - - executing = _Thread_Executing; - - _Thread_queue_Context_initialize(&context->reader); - _Thread_queue_Context_set_thread_state(&context->reader, - STATES_WAITING_FOR_RWLOCK); - _Thread_queue_Context_set_enqueue_callout( - &context->reader, rtems_bsd_rwlock_reader_enqueue); - _Thread_queue_Context_set_deadlock_callout(&context->reader, - _Thread_queue_Deadlock_fatal); - _Thread_queue_Acquire(&rw->reader_queue, &context->reader); - _Thread_queue_Enqueue(&rw->reader_queue.Queue, - &_Thread_queue_Operations_FIFO, executing, &context->reader); -} - -void -rtems_bsd_rwlock_runlock_more(rtems_bsd_rwlock *rw, - rtems_bsd_rwlock_context *context) -{ - - if (!_Thread_queue_Is_empty(&rw->writer_queue.Queue)) { - BSD_ASSERT(rw->readers == 0); - - _Thread_queue_Surrender(&rw->writer_queue.Queue, - rw->writer_queue.Queue.heads, NULL, &context->writer, - &_Thread_queue_Operations_priority); - } else { - BSD_ASSERT(!_Thread_queue_Is_empty(&rw->reader_queue.Queue)); - rtems_bsd_rwlock_ready_waiting_readers(rw, context); - } -} - -void -rtems_bsd_rwlock_ready_waiting_readers(rtems_bsd_rwlock *rw, - rtems_bsd_rwlock_context *context) -{ - - _Thread_queue_Context_initialize(&context->reader); - _Thread_queue_Acquire(&rw->reader_queue, &context->reader); - _Thread_queue_Flush_critical(&rw->reader_queue.Queue, - &_Thread_queue_Operations_FIFO, - rtems_bsd_rwlock_flush_reader_filter, - rtems_bsd_rwlock_flush_reader_post_release, - &context->reader); -} |