/*
 * AWS IoT Over-the-air Update v3.4.0
 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * 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.
 */

/**
 * @file Posix_OtaReceiveEvent_harness.c
 * @brief Implements the proof harness for Posix_OtaReceiveEvent function.
 */
/*  FreeRTOS includes for OTA library. */
#include "ota_os_posix.h"
#include <stdlib.h>

/* Includes for ota private struct types. */
#include "ota_private.h"
#include <poll.h>
#include <mqueue.h>

/* Counter for the number of iterations. */
static int count = 0;

int poll( struct pollfd * fds,
          nfds_t nfds,
          int timeout )
{
    __CPROVER_assert( fds != NULL, "fds pointer cannot be NULL" );
    __CPROVER_havoc_object( fds );

    count++;

    if( count >= BOUND )
    {
        /* Return value greater than 0 with event set to POLLIN. */
        fds->revents = POLLIN;
        return 1;
    }

    return nondet_int();
}

ssize_t mq_receive( mqd_t mqdes,
                    char * msg_ptr,
                    size_t msg_len,
                    unsigned int * msg_prio )
{
    __CPROVER_assert( msg_ptr != NULL, "msg_ptr cannot be NULL" );
    __CPROVER_havoc_object( msg_ptr );

    if( count >= BOUND )
    {
        /* Reset the counter to 0. */
        count = 0;

        /* Return success. */
        return 0;
    }

    return nondet_int();
}

void Posix_OtaReceiveEvent_harness()
{
    OtaEventContext_t * pEventCtx;
    void * pEventMsg;
    uint32_t timeout;

    /* pEventMsg is always of OtaEventMsg_t type. */
    pEventMsg = ( void * ) malloc( sizeof( OtaEventMsg_t ) );

    /* pEventMsg is always initialized before it is used in
     * Posix_OtaReceiveEvent. */
    __CPROVER_assume( pEventMsg != NULL );

    Posix_OtaReceiveEvent( pEventCtx, pEventMsg, timeout );

    free( pEventMsg );
}