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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_get_endpoint
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*
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* DESCRIPTION
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*
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* Blocking API routine to retrieve the endpoint identifier
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* associated with a specific node ID and port ID. The routine will
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* block until the specific endpoint has been created.
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*
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* INPUTS
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*
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* node_id The unique ID of the node on which the target
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* endpoint resides.
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* port_id The port ID of the target endpoint.
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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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* The endpoint identifier associated with the node ID / port ID
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* combination.
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*
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*************************************************************************/
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mcapi_endpoint_t mcapi_get_endpoint(mcapi_node_t node_id, mcapi_port_t port_id,
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mcapi_status_t *mcapi_status)
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{
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MCAPI_GLOBAL_DATA *node_data;
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mcapi_endpoint_t endpoint = 0;
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MCAPI_ENDPOINT *endp_ptr;
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mcapi_request_t request;
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/* Ensure the status parameter is valid. */
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if (mcapi_status)
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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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/* If the endpoint is located on the local node. */
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if (node_id == MCAPI_Node_ID)
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{
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/* Get a pointer to the endpoint. */
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endp_ptr = mcapi_find_local_endpoint(node_data, node_id,
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port_id);
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/* If the endpoint was found. */
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if (endp_ptr)
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{
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/* Return the endpoint handle. */
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endpoint = endp_ptr->mcapi_endp_handle;
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/* Set the status. */
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*mcapi_status = MCAPI_SUCCESS;
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}
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/* The node has not yet been initialized. */
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else
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{
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*mcapi_status = MCAPI_PENDING;
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}
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}
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/* Otherwise, query the foreign node for the information. */
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else
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{
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/* If the remote endpoint is not ready loop till it becomes
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* available.
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*/
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for (;;)
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{
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/* Issue the call to get a remote endpoint. */
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get_remote_endpoint(node_id, port_id, mcapi_status, 0xffffffff);
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if (*mcapi_status == MCAPI_ERR_TRANSMISSION)
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{
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/* Must drop and re-acquire the lock so we don't block
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* other threads forever. */
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mcapi_unlock_node_data();
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MCAPI_Sleep(1);
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mcapi_lock_node_data();
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}
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else
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{
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break;
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}
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}
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/* The get remote endpoint request was successfully sent. */
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if (*mcapi_status == MCAPI_SUCCESS)
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{
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*mcapi_status = MCAPI_PENDING;
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}
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}
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/* If the endpoint is not immediately available. */
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if (*mcapi_status == MCAPI_PENDING)
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{
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/* Initialize the request structure. */
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mcapi_init_request(&request, MCAPI_REQ_CREATED);
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/* Set up the request structure. */
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request.mcapi_target_node_id = node_id;
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request.mcapi_target_port_id = port_id;
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request.mcapi_endp_ptr = &endpoint;
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/* Suspend until the call completes or is canceled. */
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MCAPI_Suspend_Task(node_data, &request, &request.mcapi_cond,
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MCAPI_TIMEOUT_INFINITE);
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*mcapi_status = request.mcapi_status;
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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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return (endpoint);
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}
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