1 /*
2 * coreMQTT Agent v1.1.0
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23 /**
24 * @file get_time_stub.c
25 * @brief A stub to mock the retrieval of current time.
26 */
27
28 #include "core_mqtt.h"
29 #include "get_time_stub.h"
30
GetCurrentTimeStub(void)31 uint32_t GetCurrentTimeStub( void )
32 {
33 /* There are loops in the MQTT library that rely on the timestamp being
34 * reasonable in order to complete. Returning an unbounded timestamp does
35 * not add value to the proofs as the MQTT library uses the timestamp for
36 * only arithmetic operations. In C arithmetic operations on unsigned
37 * integers are guaranteed to reliably wrap around with no adverse side
38 * effects. If the time returned was unbounded, the loops could be unwound
39 * a large number of times making the proof execution very long. */
40 static uint32_t globalEntryTime = 0;
41
42 return ++globalEntryTime;
43 }
44
