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/**
* @file
*
* @ingroup RTEMSImplClassicTimer
*
* @brief This source file contains the definition of ::_Timer_server and the
* implementation of _Timer_Routine_adaptor(), _Timer_Fire(),
* _Timer_Fire_after(), _Timer_Fire_when(), _Timer_Cancel(), and the Timer
* Manager system initialization.
*/
/*
* COPYRIGHT (c) 1989-2002.
* 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/timerimpl.h>
#include <rtems/rtems/clockimpl.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/score/assert.h>
#include <rtems/score/chainimpl.h>
#include <rtems/score/thread.h>
#include <rtems/score/todimpl.h>
#include <rtems/score/watchdogimpl.h>
#include <rtems/sysinit.h>
RTEMS_STATIC_ASSERT(
PER_CPU_WATCHDOG_REALTIME == TIMER_CLASS_BIT_TIME_OF_DAY,
TIMER_CLASS_BIT_TIME_OF_DAY
);
Timer_server_Control *volatile _Timer_server;
void _Timer_Routine_adaptor( Watchdog_Control *the_watchdog )
{
Timer_Control *the_timer;
Per_CPU_Control *cpu;
the_timer = RTEMS_CONTAINER_OF( the_watchdog, Timer_Control, Ticker );
cpu = _Watchdog_Get_CPU( &the_timer->Ticker );
the_timer->stop_time = _Timer_Get_CPU_ticks( cpu );
( *the_timer->routine )( the_timer->Object.id, the_timer->user_data );
}
rtems_status_code _Timer_Fire(
rtems_id id,
rtems_interval interval,
rtems_timer_service_routine_entry routine,
void *user_data,
Timer_Classes the_class,
Watchdog_Service_routine_entry adaptor
)
{
Timer_Control *the_timer;
ISR_lock_Context lock_context;
the_timer = _Timer_Get( id, &lock_context );
if ( the_timer != NULL ) {
Per_CPU_Control *cpu;
cpu = _Timer_Acquire_critical( the_timer, &lock_context );
_Timer_Cancel( cpu, the_timer );
_Watchdog_Initialize( &the_timer->Ticker, adaptor );
the_timer->the_class = the_class;
the_timer->routine = routine;
the_timer->user_data = user_data;
the_timer->initial = interval;
the_timer->start_time = _Timer_Get_CPU_ticks( cpu );
if ( _Timer_Is_interval_class( the_class ) ) {
_Watchdog_Insert(
&cpu->Watchdog.Header[ PER_CPU_WATCHDOG_TICKS ],
&the_timer->Ticker,
cpu->Watchdog.ticks + interval
);
} else {
_Watchdog_Insert(
&cpu->Watchdog.Header[ PER_CPU_WATCHDOG_REALTIME ],
&the_timer->Ticker,
_Watchdog_Ticks_from_seconds( interval )
);
}
_Timer_Release( cpu, &lock_context );
return RTEMS_SUCCESSFUL;
}
return RTEMS_INVALID_ID;
}
rtems_status_code _Timer_Fire_after(
rtems_id id,
rtems_interval ticks,
rtems_timer_service_routine_entry routine,
void *user_data,
Timer_Classes the_class,
Watchdog_Service_routine_entry adaptor
)
{
if ( ticks == 0 )
return RTEMS_INVALID_NUMBER;
if ( !routine )
return RTEMS_INVALID_ADDRESS;
return _Timer_Fire(
id,
ticks,
routine,
user_data,
the_class,
adaptor
);
}
rtems_status_code _Timer_Fire_when(
rtems_id id,
const rtems_time_of_day *wall_time,
rtems_timer_service_routine_entry routine,
void *user_data,
Timer_Classes the_class,
Watchdog_Service_routine_entry adaptor
)
{
rtems_interval seconds;
if ( !_TOD_Is_set() )
return RTEMS_NOT_DEFINED;
if ( !routine )
return RTEMS_INVALID_ADDRESS;
if ( !_TOD_Validate( wall_time ) )
return RTEMS_INVALID_CLOCK;
seconds = _TOD_To_seconds( wall_time );
if ( seconds <= _TOD_Seconds_since_epoch() )
return RTEMS_INVALID_CLOCK;
return _Timer_Fire(
id,
seconds,
routine,
user_data,
the_class,
adaptor
);
}
void _Timer_Cancel( Per_CPU_Control *cpu, Timer_Control *the_timer )
{
Timer_Classes the_class;
the_class = the_timer->the_class;
if ( _Watchdog_Is_scheduled( &the_timer->Ticker ) ) {
the_timer->stop_time = _Timer_Get_CPU_ticks( cpu );
_Watchdog_Remove(
&cpu->Watchdog.Header[ _Timer_Watchdog_header_index( the_class ) ],
&the_timer->Ticker
);
} else if ( _Timer_Is_on_task_class( the_class ) ) {
Timer_server_Control *timer_server;
ISR_lock_Context lock_context;
timer_server = _Timer_server;
_Assert( timer_server != NULL );
_Timer_server_Acquire_critical( timer_server, &lock_context );
if ( _Watchdog_Get_state( &the_timer->Ticker ) == WATCHDOG_PENDING ) {
_Watchdog_Set_state( &the_timer->Ticker, WATCHDOG_INACTIVE );
_Chain_Extract_unprotected( &the_timer->Ticker.Node.Chain );
}
_Timer_server_Release_critical( timer_server, &lock_context );
}
}
rtems_status_code rtems_timer_create(
rtems_name name,
rtems_id *id
)
{
Timer_Control *the_timer;
if ( !rtems_is_name_valid( name ) )
return RTEMS_INVALID_NAME;
if ( !id )
return RTEMS_INVALID_ADDRESS;
the_timer = _Timer_Allocate();
if ( !the_timer ) {
_Objects_Allocator_unlock();
return RTEMS_TOO_MANY;
}
the_timer->the_class = TIMER_DORMANT;
_Watchdog_Preinitialize( &the_timer->Ticker, _Per_CPU_Get_snapshot() );
*id = _Objects_Open_u32(
&_Timer_Information,
&the_timer->Object,
name
);
_Objects_Allocator_unlock();
return RTEMS_SUCCESSFUL;
}
static void _Timer_Manager_initialization( void )
{
_Objects_Initialize_information( &_Timer_Information );
}
RTEMS_SYSINIT_ITEM(
_Timer_Manager_initialization,
RTEMS_SYSINIT_CLASSIC_TIMER,
RTEMS_SYSINIT_ORDER_MIDDLE
);
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