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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_sclchan_available
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*
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* DESCRIPTION
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*
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* Non-blocking API routine to check for data on a connected scalar
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* channel.
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*
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* INPUTS
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*
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* receive_handle The local handle identifer being checked
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* for incoming data.
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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 number of receive operations that are guaranteed to not block
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* waiting for incoming data.
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*
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*************************************************************************/
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mcapi_uint_t mcapi_sclchan_available(mcapi_sclchan_recv_hndl_t receive_handle,
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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_port_t port_id;
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mcapi_node_t node_id;
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mcapi_uint_t msg_count = 0;
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MCAPI_ENDPOINT *endp_ptr;
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/* Ensure the status pointer 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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/* Get a pointer to the endpoint. */
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endp_ptr = mcapi_decode_local_endpoint(node_data, &node_id, &port_id,
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receive_handle, mcapi_status);
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if (endp_ptr)
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{
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/* Get the data. */
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mcapi_data_available(endp_ptr, MCAPI_CHAN_SCAL_TYPE, &msg_count,
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mcapi_status);
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}
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else if (*mcapi_status == MCAPI_ERR_ENDP_INVALID)
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{
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*mcapi_status = MCAPI_ERR_CHAN_INVALID;
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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 (msg_count);
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}
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