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Mutex.cpp
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1 /*
2 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of NVIDIA CORPORATION nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "Mutex.h"
30 #include "Error.h"
31
32 namespace ArgusSamples
33 {
34
35 Mutex::Mutex()
36 : m_initialized(false)
37 {
38 }
39
40 Mutex::~Mutex()
41 {
42 shutdown();
43 }
44
45 bool Mutex::initialize()
46 {
47 if (!m_initialized)
48 {
49 if (pthread_mutex_init(&m_mutex, NULL) != 0)
50 ORIGINATE_ERROR("Failed to initialize mutex");
51 m_initialized = true;
52 }
53
54 return true;
55 }
56
57 bool Mutex::shutdown()
58 {
59 if (m_initialized)
60 {
61 if (pthread_mutex_destroy(&m_mutex) != 0)
62 ORIGINATE_ERROR("Failed to destroy mutex");
63 m_initialized = false;
64 }
65
66 return true;
67 }
68
69 bool Mutex::lock() const
70 {
71 if (!m_initialized)
72 ORIGINATE_ERROR("Not initialized");
73
74 if (pthread_mutex_lock(&m_mutex) != 0)
75 ORIGINATE_ERROR("Failed to lock mutex");
76
77 return true;
78 }
79
80 bool Mutex::unlock() const
81 {
82 if (!m_initialized)
83 ORIGINATE_ERROR("Not initialized");
84
85 if (pthread_mutex_unlock(&m_mutex) != 0)
86 ORIGINATE_ERROR("Failed to unlock mutex");
87
88 return true;
89 }
90
91 }; // namespace ArgusSamples