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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreMessageQueue
*
* @brief This source file contains the implementation of
* _CORE_message_queue_Submit().
*/
/*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* 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/coremsgimpl.h>
#include <rtems/score/objectimpl.h>
#include <rtems/score/isr.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/statesimpl.h>
Status_Control _CORE_message_queue_Submit(
CORE_message_queue_Control *the_message_queue,
Thread_Control *executing,
const void *buffer,
size_t size,
CORE_message_queue_Submit_types submit_type,
bool wait,
Thread_queue_Context *queue_context
)
{
CORE_message_queue_Buffer *the_message;
Thread_Control *the_thread;
if ( size > the_message_queue->maximum_message_size ) {
_CORE_message_queue_Release( the_message_queue, queue_context );
return STATUS_MESSAGE_INVALID_SIZE;
}
/*
* Is there a thread currently waiting on this message queue?
*/
the_thread = _CORE_message_queue_Dequeue_receiver(
the_message_queue,
buffer,
size,
submit_type,
queue_context
);
if ( the_thread != NULL ) {
return STATUS_SUCCESSFUL;
}
/*
* No one waiting on the message queue at this time, so attempt to
* queue the message up for a future receive.
*/
the_message =
_CORE_message_queue_Allocate_message_buffer( the_message_queue );
if ( the_message ) {
_CORE_message_queue_Insert_message(
the_message_queue,
the_message,
buffer,
size,
submit_type
);
#if defined(RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION)
/*
* According to POSIX, does this happen before or after the message
* is actually enqueued. It is logical to think afterwards, because
* the message is actually in the queue at this point.
*/
if (
the_message_queue->number_of_pending_messages == 1
&& the_message_queue->notify_handler != NULL
) {
( *the_message_queue->notify_handler )(
the_message_queue,
queue_context
);
} else {
_CORE_message_queue_Release( the_message_queue, queue_context );
}
#else
_CORE_message_queue_Release( the_message_queue, queue_context );
#endif
return STATUS_SUCCESSFUL;
}
#if !defined(RTEMS_SCORE_COREMSG_ENABLE_BLOCKING_SEND)
_CORE_message_queue_Release( the_message_queue, queue_context );
return STATUS_TOO_MANY;
#else
/*
* No message buffers were available so we may need to return an
* overflow error or block the sender until the message is placed
* on the queue.
*/
if ( !wait ) {
_CORE_message_queue_Release( the_message_queue, queue_context );
return STATUS_TOO_MANY;
}
/*
* Do NOT block on a send if the caller is in an ISR. It is
* deadly to block in an ISR.
*/
if ( _ISR_Is_in_progress() ) {
_CORE_message_queue_Release( the_message_queue, queue_context );
return STATUS_MESSAGE_QUEUE_WAIT_IN_ISR;
}
/*
* WARNING!! executing should NOT be used prior to this point.
* Thus the unusual choice to open a new scope and declare
* it as a variable. Doing this emphasizes how dangerous it
* would be to use this variable prior to here.
*/
executing->Wait.return_argument_second.immutable_object = buffer;
executing->Wait.option = (uint32_t) size;
executing->Wait.count = submit_type;
_Thread_queue_Context_set_thread_state(
queue_context,
STATES_WAITING_FOR_MESSAGE
);
_Thread_queue_Enqueue(
&the_message_queue->Wait_queue.Queue,
the_message_queue->operations,
executing,
queue_context
);
return _Thread_Wait_get_status( executing );
#endif
}
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