1 /*
2 * Copyright (c) 2007-2017, Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included
12 * in all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22 //!
23 //! \file      cm_csync.h
24 //! \brief     Contains CSync and CLock definitions
25 //!
26 
27 #ifndef MEDIADRIVER_LINUX_COMMON_CM_CMCSYNC_H_
28 #define MEDIADRIVER_LINUX_COMMON_CM_CMCSYNC_H_
29 
30 #include "cm_debug.h"
31 
32 namespace CMRT_UMD
33 {
34 class CSync
35 {
36 public:
CSync()37     CSync()
38     {
39         int32_t ret = 0;
40         ret = pthread_mutex_init(&m_criticalSection, nullptr);
41         if (ret != 0)
42         {
43             CM_ASSERTMESSAGE("Error: Failed in pthread_mutex_init.");
44         }
45     }
46 
~CSync()47     ~CSync()
48     {
49         int32_t ret = 0 ;
50         ret = pthread_mutex_destroy(&m_criticalSection);
51         if (ret != 0)
52         {
53             CM_ASSERTMESSAGE("Error: Failed in pthread_mutex_destroy.");
54         }
55     }
56 
Acquire()57     void Acquire()
58     {
59         int32_t ret = 0;
60         ret = pthread_mutex_lock(&m_criticalSection);
61         if (ret != 0)
62         {
63             CM_ASSERTMESSAGE("Error: Failed in pthread_mutex_lock.");
64         }
65     }
66 
Release()67     void Release()
68     {
69         int32_t ret = 0;
70         ret = pthread_mutex_unlock(&m_criticalSection);
71         if (ret != 0)
72         {
73             CM_ASSERTMESSAGE("Error: Failed in pthread_mutex_unlock.");
74         }
75     }
76 
77 private:
78     pthread_mutex_t m_criticalSection;
79 };
80 
81 class CLock
82 {
83 public:
CLock(CSync & refSync)84     CLock(CSync &refSync) : m_refSync(refSync) { Lock(); }
~CLock()85     ~CLock() { Unlock(); }
86 
87 private:
88     CSync &m_refSync;                     // Synchronization object
89 
90     CLock(const CLock &refcSource);
91     CLock &operator=(const CLock &refcSource);
Lock()92     void Lock() { m_refSync.Acquire(); }
Unlock()93     void Unlock() { m_refSync.Release(); }
94 };
95 }; //namespace CMRT_UMD
96 
97 #endif // #ifndef MEDIADRIVER_LINUX_COMMON_CM_CMCSYNC_H_
98