diff options
Diffstat (limited to 'cpukit/score/src/threadqdequeuefifo.c')
-rw-r--r-- | cpukit/score/src/threadqdequeuefifo.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/cpukit/score/src/threadqdequeuefifo.c b/cpukit/score/src/threadqdequeuefifo.c new file mode 100644 index 0000000000..0ea36791fc --- /dev/null +++ b/cpukit/score/src/threadqdequeuefifo.c @@ -0,0 +1,79 @@ +/* + * Thread Queue Handler + * + * + * COPYRIGHT (c) 1989-2008. + * 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/chain.h> +#include <rtems/score/isr.h> +#include <rtems/score/object.h> +#include <rtems/score/states.h> +#include <rtems/score/thread.h> +#include <rtems/score/threadq.h> +#include <rtems/score/tqdata.h> + +/*PAGE + * + * _Thread_queue_Dequeue_fifo + * + * This routine removes a thread from the specified threadq. + * + * Input parameters: + * the_thread_queue - pointer to threadq + * + * Output parameters: + * returns - thread dequeued or NULL + * + * INTERRUPT LATENCY: + * check sync + * FIFO + */ + +Thread_Control *_Thread_queue_Dequeue_fifo( + Thread_queue_Control *the_thread_queue +) +{ + ISR_Level level; + Thread_Control *the_thread; + + _ISR_Disable( level ); + if ( !_Chain_Is_empty( &the_thread_queue->Queues.Fifo ) ) { + + the_thread = (Thread_Control *) + _Chain_Get_first_unprotected( &the_thread_queue->Queues.Fifo ); + + the_thread->Wait.queue = NULL; + if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { + _ISR_Enable( level ); + _Thread_Unblock( the_thread ); + } else { + _Watchdog_Deactivate( &the_thread->Timer ); + _ISR_Enable( level ); + (void) _Watchdog_Remove( &the_thread->Timer ); + _Thread_Unblock( the_thread ); + } + +#if defined(RTEMS_MULTIPROCESSING) + if ( !_Objects_Is_local_id( the_thread->Object.id ) ) + _Thread_MP_Free_proxy( the_thread ); +#endif + + return the_thread; + } + + _ISR_Enable( level ); + return NULL; +} |