diff options
Diffstat (limited to 'cpukit/rtems/src/ratemongetstatus.c')
-rw-r--r-- | cpukit/rtems/src/ratemongetstatus.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/cpukit/rtems/src/ratemongetstatus.c b/cpukit/rtems/src/ratemongetstatus.c new file mode 100644 index 0000000000..4a05a93ca6 --- /dev/null +++ b/cpukit/rtems/src/ratemongetstatus.c @@ -0,0 +1,80 @@ +/* + * Rate Monotonic Manager + * + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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_get_status + * + * This directive allows a thread to obtain status information on a + * period. + * + * Input parameters: + * id - rate monotonic id + * status - pointer to status control block + * + * Output parameters: + * RTEMS_SUCCESSFUL - if successful + * error code - if unsuccessful + * + */ + +rtems_status_code rtems_rate_monotonic_get_status( + Objects_Id id, + rtems_rate_monotonic_period_status *status +) +{ + Objects_Locations location; + Rate_monotonic_Control *the_period; + + if ( status == NULL ) + return RTEMS_INVALID_ADDRESS; + + 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: + status->state = the_period->state; + + if ( status->state == RATE_MONOTONIC_INACTIVE ) { + status->ticks_since_last_period = 0; + status->ticks_executed_since_last_period = 0; + } else { + status->ticks_since_last_period = + _Watchdog_Ticks_since_boot - the_period->time_at_period; + + status->ticks_executed_since_last_period = + the_period->owner->ticks_executed - + the_period->owner_ticks_executed_at_period; + } + + _Thread_Enable_dispatch(); + return RTEMS_SUCCESSFUL; + } + + return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ +} |