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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicEvent
*
* @brief This source file contains the implementation of
* _Event_Seize() and the Event Manager multiprocessing (MP) support system
* initialization.
*/
/*
* COPYRIGHT (c) 1989-2008.
* 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/sysinit.h>
#include <rtems/rtems/eventimpl.h>
#include <rtems/rtems/optionsimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/watchdogimpl.h>
rtems_status_code _Event_Seize(
rtems_event_set event_in,
rtems_option option_set,
rtems_interval ticks,
rtems_event_set *event_out,
Thread_Control *executing,
Event_Control *event,
Thread_Wait_flags wait_class,
States_Control block_state,
ISR_lock_Context *lock_context
)
{
rtems_event_set seized_events;
rtems_event_set pending_events;
bool success;
Thread_Wait_flags intend_to_block;
Per_CPU_Control *cpu_self;
pending_events = event->pending_events;
seized_events = _Event_sets_Get( pending_events, event_in );
if ( !_Event_sets_Is_empty( seized_events ) &&
(seized_events == event_in || _Options_Is_any( option_set )) ) {
event->pending_events =
_Event_sets_Clear( pending_events, seized_events );
_Thread_Wait_release_default( executing, lock_context );
*event_out = seized_events;
return RTEMS_SUCCESSFUL;
}
if ( _Options_Is_no_wait( option_set ) ) {
_Thread_Wait_release_default( executing, lock_context );
*event_out = seized_events;
return RTEMS_UNSATISFIED;
}
intend_to_block = wait_class | THREAD_WAIT_STATE_INTEND_TO_BLOCK;
/*
* Note what we are waiting for BEFORE we enter the critical section.
* The interrupt critical section management code needs this to be
* set properly when we are marked as in the event critical section.
*
* NOTE: Since interrupts are disabled, this isn't that much of an
* issue but better safe than sorry.
*/
executing->Wait.return_code = STATUS_SUCCESSFUL;
executing->Wait.option = option_set;
executing->Wait.count = event_in;
executing->Wait.return_argument = event_out;
_Thread_Wait_flags_set( executing, intend_to_block );
cpu_self = _Thread_Dispatch_disable_critical( lock_context );
_Thread_Wait_release_default( executing, lock_context );
if ( ticks ) {
_Thread_Add_timeout_ticks( executing, cpu_self, ticks );
}
_Thread_Set_state( executing, block_state );
success = _Thread_Wait_flags_try_change_acquire(
executing,
intend_to_block,
wait_class | THREAD_WAIT_STATE_BLOCKED
);
if ( !success ) {
_Thread_Timer_remove( executing );
_Thread_Unblock( executing );
}
_Thread_Dispatch_direct( cpu_self );
return _Status_Get_after_wait( executing );
}
#if defined(RTEMS_MULTIPROCESSING)
static void _Event_MP_Initialize( void )
{
_MPCI_Register_packet_processor( MP_PACKET_EVENT, _Event_MP_Process_packet );
}
RTEMS_SYSINIT_ITEM(
_Event_MP_Initialize,
RTEMS_SYSINIT_CLASSIC_EVENT_MP,
RTEMS_SYSINIT_ORDER_MIDDLE
);
#endif
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