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/**
* @file
*
* @brief RTEMS Send Signal
* @ingroup ClassicSignal
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/signalimpl.h>
#include <rtems/rtems/asrimpl.h>
#include <rtems/rtems/tasksdata.h>
#include <rtems/score/threaddispatch.h>
#include <rtems/score/threadimpl.h>
rtems_status_code rtems_signal_send(
rtems_id id,
rtems_signal_set signal_set
)
{
Thread_Control *the_thread;
ISR_lock_Context lock_context;
RTEMS_API_Control *api;
ASR_Information *asr;
if ( signal_set == 0 ) {
return RTEMS_INVALID_NUMBER;
}
the_thread = _Thread_Get( id, &lock_context );
if ( the_thread == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
return _Signal_MP_Send( id, signal_set );
#else
return RTEMS_INVALID_ID;
#endif
}
api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
asr = &api->Signal;
_Thread_State_acquire_critical( the_thread, &lock_context );
if ( _ASR_Is_null_handler( asr->handler ) ) {
_Thread_State_release( the_thread, &lock_context );
return RTEMS_NOT_DEFINED;
}
if ( asr->is_enabled ) {
Per_CPU_Control *cpu_self;
_ASR_Post_signals( signal_set, &asr->signals_posted );
_Thread_Add_post_switch_action(
the_thread,
&api->Signal_action,
_Signal_Action_handler
);
cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
_Thread_State_release( the_thread, &lock_context );
_Thread_Dispatch_enable( cpu_self );
} else {
_ASR_Post_signals( signal_set, &asr->signals_pending );
_Thread_State_release( the_thread, &lock_context );
}
return RTEMS_SUCCESSFUL;
}
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