+
−/*
+
−+-----------------------------------------------------------------------------
+
−|  File     : gdd_dio_queue.c
+
−+-----------------------------------------------------------------------------
+
−|  Copyright 2002 Texas Instruments Berlin, AG
+
−|                 All rights reserved.
+
−|
+
−|                 This file is confidential and a trade secret of Texas
+
−|                 Instruments Berlin, AG
+
−|                 The receipt of or possession of this file does not convey
+
−|                 any rights to reproduce or disclose its contents or to
+
−|                 manufacture, use, or sell anything it may describe, in
+
−|                 whole, or in part, without the specific written consent of
+
−|                 Texas Instruments Berlin, AG.
+
−+-----------------------------------------------------------------------------
+
−|  Purpose  : Implements the queue functions for the DIO buffer FIFO
+
−+-----------------------------------------------------------------------------
+
−*/
+
−
+
−
+
−#define ENTITY_GDD_DIO
+
−
+
−/*==== INCLUDES =============================================================*/
+
−
+
−#include "typedefs.h"   /* to get Condat data types */
+
−#include "vsi.h"        /* to get a lot of macros */
+
−
+
−#include <string.h>  /* for memset */
+
−
+
−#include "gdd_dio_queue.h"
+
−
+
−/*==== CONST ================================================================*/
+
−
+
−/*==== LOCAL VARS ===========================================================*/
+
−
+
−/*==== PRIVATE FUNCTIONS ====================================================*/
+
−
+
−/*==== PUBLIC FUNCTIONS =====================================================*/
+
−
+
−
+
−GLOBAL void gdd_dio_queue_clear(T_GDD_BUF_QUEUE *queue)
+
−{
+
−  queue->next_in = 0;
+
−  queue->next_out = 0;
+
−  memset(queue->elems, 0, sizeof(T_dio_buffer *) * GDD_MAX_DIO_BUF);
+
−}
+
−
+
−
+
−BOOL gdd_dio_queue_is_empty(const T_GDD_BUF_QUEUE *queue)
+
−{
+
−  return (queue->next_in == queue->next_out) &&
+
−         (0 == queue->elems[queue->next_out]);
+
−}
+
−
+
−
+
−GLOBAL BOOL gdd_dio_queue_is_full(const T_GDD_BUF_QUEUE *queue)
+
−{
+
−  return (queue->next_in == queue->next_out) && 
+
−          !(0 == queue->elems[queue->next_out]);
+
−}
+
−
+
−
+
−GLOBAL BOOL gdd_dio_dequeue(T_GDD_BUF_QUEUE *queue, T_dio_buffer **elem)
+
−{
+
−  if(gdd_dio_queue_is_empty(queue))
+
−  {
+
−    return FALSE;
+
−  }
+
−  else
+
−  {
+
−    (*elem) = queue->elems[queue->next_out];
+
−    queue->elems[queue->next_out] = 0;
+
−    ++(queue->next_out);
+
−    if(queue->next_out EQ GDD_MAX_DIO_BUF)
+
−      queue->next_out = 0;
+
−    return TRUE;
+
−  }
+
−}
+
−
+
−GLOBAL BOOL gdd_dio_queue_peek_next_for_dequeue
+
−(const T_GDD_BUF_QUEUE *queue, /*out*/T_dio_buffer **elem)
+
−{
+
−  if(gdd_dio_queue_is_empty(queue))
+
−  {
+
−    return FALSE;
+
−  }
+
−  else
+
−  {
+
−    (*elem) = queue->elems[queue->next_out];
+
−    return TRUE;
+
−  }
+
−}
+
−
+
−GLOBAL BOOL gdd_dio_enqueue(T_dio_buffer *elem, T_GDD_BUF_QUEUE *queue, /*out*/U16 *pos)
+
−{
+
−  if(gdd_dio_queue_is_full(queue))
+
−  {
+
−    return FALSE;
+
−  }
+
−  else
+
−  {
+
−    queue->elems[queue->next_in] = elem;
+
−    (*pos) = queue->next_in;
+
−    ++(queue->next_in);
+
−    if(queue->next_in EQ GDD_MAX_DIO_BUF)
+
−      queue->next_in = 0;
+
−    return TRUE;
+
−  }
+
−}
+
−
+
−
+
−GLOBAL void gdd_dio_queue_peek(const T_GDD_BUF_QUEUE *queue, U16 pos, /*out*/T_dio_buffer **elem)
+
−{
+
−  (*elem) = queue->elems[pos];
+
−}