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/*
 * FreeRTOS V202107.00
 * Copyright (C) Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

#include "proof/queue.h"

BaseType_t xQueueIsQueueEmptyFromISR( const QueueHandle_t xQueue )
/*@requires queue(xQueue, ?Storage, ?N, ?M, ?W, ?R, ?K, ?is_locked, ?abs);@*/

/*@ensures queue(xQueue, Storage, N, M, W, R, K, is_locked, abs) &*&
 *  result == ((K == 0) ? pdTRUE : pdFALSE);@*/
{
    BaseType_t xReturn;

    #ifdef VERIFAST /*< const pointer declaration */
        Queue_t * pxQueue = xQueue;
    #else
        Queue_t * const pxQueue = xQueue;
    #endif

    configASSERT( pxQueue );

    if( pxQueue->uxMessagesWaiting == ( UBaseType_t ) 0 )
    {
        xReturn = pdTRUE;
    }
    else
    {
        xReturn = pdFALSE;
    }

    return xReturn;
} /*lint !e818 xQueue could not be pointer to const because it is a typedef. */