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/*
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* Copyright (c) 2010, Mentor Graphics Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the <ORGANIZATION> nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <openmcapi.h>
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/*************************************************************************
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*
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* FUNCTION
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*
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* mcapi_cancel
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*
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* DESCRIPTION
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*
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* Blocking API routine to cancel an outstanding non-blocking
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* operation. Any pending calls to mcapi_wait() or mcapi_wait_any()
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* for the specific operation will also be canceled.
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*
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* INPUTS
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*
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* *request A pointer to the request structure filled
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* in by the specific operation being canceled.
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* *mcapi_status A pointer to memory that will be filled in
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* with the status of the call.
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*
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* OUTPUTS
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*
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* None.
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*
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*************************************************************************/
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void mcapi_cancel(mcapi_request_t *request, mcapi_status_t *mcapi_status)
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{
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mcapi_request_t *req_ptr;
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MCAPI_GLOBAL_DATA *node_data;
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MCAPI_ENDPOINT *endp_ptr;
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mcapi_port_t port_id;
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mcapi_node_t node_id;
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mcapi_status_t local_status;
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/* Validate the mcapi_status input parameter. */
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if (mcapi_status)
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{
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/* Validate request. */
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if (request)
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{
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/* Get the lock. */
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mcapi_lock_node_data();
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/* Get a pointer to the global node list. */
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node_data = mcapi_get_node_data();
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/* Get a pointer to a request structure matching this one. */
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req_ptr =
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mcapi_find_request(request, &node_data->mcapi_local_req_queue);
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/* At least one request was found. */
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if (req_ptr)
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{
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*mcapi_status = MCAPI_SUCCESS;
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/* There could be other tasks suspended on the same request.
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* Find each one and resume.
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*/
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while (req_ptr)
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{
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/* If the status is pending, cancel the operation. */
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if (req_ptr->mcapi_status == MCAPI_PENDING)
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{
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/* If this is a get endpoint request for a foreign
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* endpoint.
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*/
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if ( (req_ptr->mcapi_type == MCAPI_REQ_CREATED) &&
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(req_ptr->mcapi_target_node_id != MCAPI_Node_ID) )
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{
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/* Set the status to canceled. */
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req_ptr->mcapi_status = MCAPI_ERR_REQUEST_CANCELLED;
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/* Cancel the outstanding operation. */
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mcapi_tx_response(node_data, req_ptr);
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}
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else
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{
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switch (req_ptr->mcapi_type)
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{
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/* Cancel the attempt at opening the receive / send
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* side of the connection.
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*/
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case MCAPI_REQ_RX_OPEN:
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case MCAPI_REQ_TX_OPEN:
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/* Get a pointer to the local endpoint. */
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endp_ptr =
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mcapi_decode_local_endpoint(node_data, &node_id,
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&port_id,
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request->mcapi_target_endp,
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&local_status);
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if (endp_ptr)
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{
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/* Set the disconnected flag. */
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endp_ptr->mcapi_state =
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(MCAPI_ENDP_DISCONNECTED | MCAPI_ENDP_OPEN);
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/* Clear the channel type. */
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endp_ptr->mcapi_chan_type = 0;
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}
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break;
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default:
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break;
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}
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}
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}
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/* Resume the request. */
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mcapi_resume(node_data, req_ptr, MCAPI_ERR_REQUEST_CANCELLED);
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/* Find another matching request. */
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req_ptr =
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mcapi_find_request(request, &node_data->mcapi_local_req_queue);
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}
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}
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/* If no matching request was found, return an error. */
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else
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{
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/* If the request that was passed in is pending, set
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* the status to canceled.
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*/
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if (request->mcapi_status == MCAPI_PENDING)
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{
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request->mcapi_status = MCAPI_ERR_REQUEST_CANCELLED;
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/* This request structure does not get stored on
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* the node's request list.
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*/
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*mcapi_status = MCAPI_SUCCESS;
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}
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else
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{
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*mcapi_status = MCAPI_ERR_REQUEST_INVALID;
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}
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}
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/* Release the lock. */
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mcapi_unlock_node_data();
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}
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/* Request is not valid. */
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else
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{
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*mcapi_status = MCAPI_ERR_REQUEST_INVALID;
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}
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}
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}
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