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-rw-r--r--cpukit/score/src/coremsgflushsupp.c84
1 files changed, 0 insertions, 84 deletions
diff --git a/cpukit/score/src/coremsgflushsupp.c b/cpukit/score/src/coremsgflushsupp.c
deleted file mode 100644
index 041972fb9c..0000000000
--- a/cpukit/score/src/coremsgflushsupp.c
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@@ -1,84 +0,0 @@
-/**
- * @file
- *
- * @brief Flush Messages Support Routine
- *
- * @ingroup ScoreMessageQueue
- */
-
-/*
- * 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.org/license/LICENSE.
- */
-
-#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/coremsgimpl.h>
-#include <rtems/score/thread.h>
-#include <rtems/score/wkspace.h>
-
-uint32_t _CORE_message_queue_Flush_support(
- CORE_message_queue_Control *the_message_queue
-)
-{
- ISR_Level level;
- Chain_Node *inactive_head;
- Chain_Node *inactive_first;
- Chain_Node *message_queue_first;
- Chain_Node *message_queue_last;
- uint32_t count;
-
- /*
- * Currently, RTEMS supports no API that has both flush and blocking
- * sends. Thus, this routine assumes that there are no senders
- * blocked waiting to send messages. In the event, that an API is
- * added that can flush a message queue when threads are blocked
- * waiting to send, there are two basic behaviors envisioned:
- *
- * (1) The thread queue of pending senders is a logical extension
- * of the pending message queue. In this case, it should be
- * flushed using the _Thread_queue_Flush() service with a status
- * such as CORE_MESSAGE_QUEUE_SENDER_FLUSHED (which currently does
- * not exist). This can be implemented without changing the "big-O"
- * of the message flushing part of the routine.
- *
- * (2) Only the actual messages queued should be purged. In this case,
- * the blocked sender threads must be allowed to send their messages.
- * In this case, the implementation will be forced to individually
- * dequeue the senders and queue their messages. This will force
- * this routine to have "big O(n)" where n is the number of blocked
- * senders. If there are more messages pending than senders blocked,
- * then the existing flush code can be used to dispose of the remaining
- * pending messages.
- *
- * For now, though, we are very happy to have a small routine with
- * fixed execution time that only deals with pending messages.
- */
-
- _ISR_Disable( level );
- inactive_head = _Chain_Head( &the_message_queue->Inactive_messages );
- inactive_first = inactive_head->next;
- message_queue_first = _Chain_First( &the_message_queue->Pending_messages );
- message_queue_last = _Chain_Last( &the_message_queue->Pending_messages );
-
- inactive_head->next = message_queue_first;
- message_queue_last->next = inactive_first;
- inactive_first->previous = message_queue_last;
- message_queue_first->previous = inactive_head;
-
- _Chain_Initialize_empty( &the_message_queue->Pending_messages );
-
- count = the_message_queue->number_of_pending_messages;
- the_message_queue->number_of_pending_messages = 0;
- _ISR_Enable( level );
- return count;
-}