1 files changed, 87 insertions, 0 deletions
diff --git a/c/src/exec/score/src/threadqdequeuefifo.c b/c/src/exec/score/src/threadqdequeuefifo.c
new file mode 100644
index 0000000000..243f0e2ec2
--- /dev/null
+++ b/c/src/exec/score/src/threadqdequeuefifo.c
@@ -0,0 +1,87 @@
+/*
+ *  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_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 );
+
+    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;
+  } 
+
+  switch ( the_thread_queue->sync_state ) {
+    case THREAD_QUEUE_SYNCHRONIZED:
+    case THREAD_QUEUE_SATISFIED:
+      _ISR_Enable( level );
+      return NULL;
+
+    case THREAD_QUEUE_NOTHING_HAPPENED:
+    case THREAD_QUEUE_TIMEOUT:
+      the_thread_queue->sync_state = THREAD_QUEUE_SATISFIED;
+      _ISR_Enable( level );
+      return _Thread_Executing;
+  }
+  return NULL;                /* this is only to prevent warnings */
+}
+