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Diffstat (limited to 'cpukit/score/src/watchdogremove.c')
-rw-r--r-- | cpukit/score/src/watchdogremove.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/cpukit/score/src/watchdogremove.c b/cpukit/score/src/watchdogremove.c new file mode 100644 index 0000000000..3ce3367657 --- /dev/null +++ b/cpukit/score/src/watchdogremove.c @@ -0,0 +1,73 @@ +/* + * Watchdog Handler + * + * + * 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.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/system.h> +#include <rtems/score/isr.h> +#include <rtems/score/watchdog.h> + +/*PAGE + * + * _Watchdog_Remove + * + * The routine removes a watchdog from a delta chain and updates + * the delta counters of the remaining watchdogs. + */ + +Watchdog_States _Watchdog_Remove( + Watchdog_Control *the_watchdog +) +{ + ISR_Level level; + Watchdog_States previous_state; + Watchdog_Control *next_watchdog; + + _ISR_Disable( level ); + previous_state = the_watchdog->state; + switch ( previous_state ) { + case WATCHDOG_INACTIVE: + break; + + case WATCHDOG_BEING_INSERTED: + + /* + * It is not actually on the chain so just change the state and + * the Insert operation we interrupted will be aborted. + */ + the_watchdog->state = WATCHDOG_INACTIVE; + break; + + case WATCHDOG_ACTIVE: + case WATCHDOG_REMOVE_IT: + + the_watchdog->state = WATCHDOG_INACTIVE; + next_watchdog = _Watchdog_Next( the_watchdog ); + + if ( _Watchdog_Next(next_watchdog) ) + next_watchdog->delta_interval += the_watchdog->delta_interval; + + if ( _Watchdog_Sync_count ) + _Watchdog_Sync_level = _ISR_Nest_level; + + _Chain_Extract_unprotected( &the_watchdog->Node ); + break; + } + the_watchdog->stop_time = _Watchdog_Ticks_since_boot; + + _ISR_Enable( level ); + return( previous_state ); +} |