diff options
Diffstat (limited to 'c/src/exec/score/src/threadqdequeue.c')
-rw-r--r-- | c/src/exec/score/src/threadqdequeue.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/c/src/exec/score/src/threadqdequeue.c b/c/src/exec/score/src/threadqdequeue.c new file mode 100644 index 0000000000..0d34f20adb --- /dev/null +++ b/c/src/exec/score/src/threadqdequeue.c @@ -0,0 +1,63 @@ +/* + * Thread Queue Handler + * + * + * 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/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 + * + * This routine removes a thread from the specified threadq. If the + * threadq discipline is FIFO, it unblocks a thread, and cancels its + * timeout timer. Priority discipline is processed elsewhere. + * + * Input parameters: + * the_thread_queue - pointer to threadq + * + * Output parameters: + * returns - thread dequeued or NULL + * + * INTERRUPT LATENCY: + * check sync + */ + +Thread_Control *_Thread_queue_Dequeue( + Thread_queue_Control *the_thread_queue +) +{ + Thread_Control *the_thread; + + switch ( the_thread_queue->discipline ) { + case THREAD_QUEUE_DISCIPLINE_FIFO: + the_thread = _Thread_queue_Dequeue_fifo( the_thread_queue ); + break; + case THREAD_QUEUE_DISCIPLINE_PRIORITY: + the_thread = _Thread_queue_Dequeue_priority( the_thread_queue ); + break; + default: /* this is only to prevent warnings */ + the_thread = NULL; + break; + } + + return( the_thread ); +} + |