diff options
Diffstat (limited to 'c/src/exec/rtems/src/ratemonperiod.c')
| -rw-r--r-- | c/src/exec/rtems/src/ratemonperiod.c | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/c/src/exec/rtems/src/ratemonperiod.c b/c/src/exec/rtems/src/ratemonperiod.c deleted file mode 100644 index 854f39f812..0000000000 --- a/c/src/exec/rtems/src/ratemonperiod.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Rate Monotonic Manager - * - * - * COPYRIGHT (c) 1989-1999. - * 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.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/rtems/status.h> -#include <rtems/rtems/support.h> -#include <rtems/score/isr.h> -#include <rtems/score/object.h> -#include <rtems/rtems/ratemon.h> -#include <rtems/score/thread.h> - -/*PAGE - * - * rtems_rate_monotonic_period - * - * This directive allows a thread to manipulate a rate monotonic timer. - * - * Input parameters: - * id - rate monotonic id - * length - length of period (in ticks) - * - * Output parameters: - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_rate_monotonic_period( - Objects_Id id, - rtems_interval length -) -{ - Rate_monotonic_Control *the_period; - Objects_Locations location; - rtems_status_code return_value; - rtems_rate_monotonic_period_states local_state; - ISR_Level level; - - the_period = _Rate_monotonic_Get( id, &location ); - switch ( location ) { - case OBJECTS_REMOTE: /* should never return this */ - return RTEMS_INTERNAL_ERROR; - - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - - case OBJECTS_LOCAL: - if ( !_Thread_Is_executing( the_period->owner ) ) { - _Thread_Enable_dispatch(); - return RTEMS_NOT_OWNER_OF_RESOURCE; - } - - if ( length == RTEMS_PERIOD_STATUS ) { - switch ( the_period->state ) { - case RATE_MONOTONIC_INACTIVE: - return_value = RTEMS_NOT_DEFINED; - break; - case RATE_MONOTONIC_ACTIVE: - return_value = RTEMS_SUCCESSFUL; - break; - case RATE_MONOTONIC_EXPIRED: - return_value = RTEMS_TIMEOUT; - break; - default: /* unreached -- only to remove warnings */ - return_value = RTEMS_INTERNAL_ERROR; - break; - } - _Thread_Enable_dispatch(); - return( return_value ); - } - - _ISR_Disable( level ); - switch ( the_period->state ) { - case RATE_MONOTONIC_INACTIVE: - _ISR_Enable( level ); - the_period->state = RATE_MONOTONIC_ACTIVE; - _Watchdog_Initialize( - &the_period->Timer, - _Rate_monotonic_Timeout, - id, - NULL - ); - - the_period->owner_ticks_executed_at_period = - _Thread_Executing->ticks_executed; - - the_period->time_at_period = _Watchdog_Ticks_since_boot; - the_period->next_length = length; - - _Watchdog_Insert_ticks( &the_period->Timer, length ); - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - - case RATE_MONOTONIC_ACTIVE: - /* - * This tells the _Rate_monotonic_Timeout that this task is - * in the process of blocking on the period and that we - * may be changing the length of the next period. - */ - - the_period->state = RATE_MONOTONIC_OWNER_IS_BLOCKING; - the_period->next_length = length; - - _ISR_Enable( level ); - - _Thread_Executing->Wait.id = the_period->Object.id; - _Thread_Set_state( _Thread_Executing, STATES_WAITING_FOR_PERIOD ); - - /* - * Did the watchdog timer expire while we were actually blocking - * on it? - */ - - _ISR_Disable( level ); - local_state = the_period->state; - the_period->state = RATE_MONOTONIC_ACTIVE; - _ISR_Enable( level ); - - /* - * If it did, then we want to unblock ourself and continue as - * if nothing happen. The period was reset in the timeout routine. - */ - - if ( local_state == RATE_MONOTONIC_EXPIRED_WHILE_BLOCKING ) - _Thread_Clear_state( _Thread_Executing, STATES_WAITING_FOR_PERIOD ); - - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - break; - - case RATE_MONOTONIC_EXPIRED: - _ISR_Enable( level ); - the_period->state = RATE_MONOTONIC_ACTIVE; - the_period->owner_ticks_executed_at_period = - _Thread_Executing->ticks_executed; - the_period->time_at_period = _Watchdog_Ticks_since_boot; - the_period->next_length = length; - - _Watchdog_Insert_ticks( &the_period->Timer, length ); - _Thread_Enable_dispatch(); - return RTEMS_TIMEOUT; - - case RATE_MONOTONIC_OWNER_IS_BLOCKING: - case RATE_MONOTONIC_EXPIRED_WHILE_BLOCKING: - /* - * These should never happen. - */ - break; - } - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} |