vipdestroycq.c

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/********************************************************
 * Myricom VI-GM  networking software and documentation *
 * Copyright (c) 2001 by Myricom, Inc.                  *
 * All rights reserved.                                 *
 * See the file `COPYING' for copyright notice.         *
 ********************************************************/

#include <stdlib.h>

#include "vipl_priv.h"


VIP_ENTRY_POINT VIP_RETURN
VipDestroyCQ (VIP_CQ_HANDLE CQHandle)
{
  VIP_CQ *vip_cq_ptr;
  VIP_NIC *vip_nic_ptr;
  VIP_DEBUG_LABEL (("VipDestroyCQ"));


  /* check regmem handle */
  vip_cq_ptr = (VIP_CQ *) CQHandle;
  if (VIP_INVALID_CQ_HANDLE (vip_cq_ptr))
    {
      VIP_DEBUG (("Invalid CQ handle"));
      return VIP_INVALID_PARAMETER;
    }
  vip_nic_ptr = vip_cq_ptr->handle.vip_nic_ptr;
  VIP_MUTEX_LOCK (&(vip_nic_ptr->lock));

  if (vip_cq_ptr->handle.ref_count > 0)
    {
      VIP_DEBUG (("CQ still in use"));
      VIP_MUTEX_UNLOCK (&(vip_nic_ptr->lock));
      return VIP_ERROR_RESOURCE;
    }

  if (vip_cq_ptr->count > 0)
    {
      VIP_ASSERT (vip_cq_ptr->queue != NULL);
      free (vip_cq_ptr->queue);
    }

  vip_free_handle (&(vip_nic_ptr->vip_cq_set), (VIP_HANDLE *) vip_cq_ptr);
  VIP_MUTEX_UNLOCK (&(vip_nic_ptr->lock));
  VIP_DEBUG (("Success"));
  return VIP_SUCCESS;
}