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1 | #pragma once |
2 | /* | |
3 | * This file is part of the libCEC(R) library. | |
4 | * | |
16f47961 | 5 | * libCEC(R) is Copyright (C) 2011-2013 Pulse-Eight Limited. All rights reserved. |
004b8382 LOK |
6 | * libCEC(R) is an original work, containing original code. |
7 | * | |
8 | * libCEC(R) is a trademark of Pulse-Eight Limited. | |
9 | * | |
10 | * This program is dual-licensed; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | * | |
24 | * | |
25 | * Alternatively, you can license this library under a commercial license, | |
26 | * please contact Pulse-Eight Licensing for more information. | |
27 | * | |
28 | * For more information contact: | |
29 | * Pulse-Eight Licensing <license@pulse-eight.com> | |
30 | * http://www.pulse-eight.com/ | |
31 | * http://www.pulse-eight.net/ | |
32 | */ | |
33 | ||
004b8382 LOK |
34 | #include "platform/threads/mutex.h" |
35 | #include "platform/util/buffer.h" | |
36 | ||
37 | namespace CEC | |
38 | { | |
39 | // a buffer that priotises the input from the TV. | |
40 | // if we need more than this, we'll have to change it into a priority_queue | |
41 | class CCECInputBuffer | |
42 | { | |
43 | public: | |
44 | CCECInputBuffer(void) : m_bHasData(false) {} | |
45 | virtual ~CCECInputBuffer(void) | |
46 | { | |
aaff5cee LOK |
47 | Broadcast(); |
48 | } | |
49 | ||
50 | void Broadcast(void) | |
51 | { | |
52 | PLATFORM::CLockObject lock(m_mutex); | |
53 | m_bHasData = true; | |
004b8382 LOK |
54 | m_condition.Broadcast(); |
55 | } | |
56 | ||
57 | bool Push(const cec_command &command) | |
58 | { | |
59 | bool bReturn(false); | |
60 | PLATFORM::CLockObject lock(m_mutex); | |
61 | if (command.initiator == CECDEVICE_TV) | |
62 | bReturn = m_tvInBuffer.Push(command); | |
63 | else | |
64 | bReturn = m_inBuffer.Push(command); | |
65 | ||
66 | m_bHasData |= bReturn; | |
67 | if (m_bHasData) | |
68 | m_condition.Signal(); | |
69 | ||
70 | return bReturn; | |
71 | } | |
72 | ||
73 | bool Pop(cec_command &command, uint16_t iTimeout) | |
74 | { | |
75 | bool bReturn(false); | |
76 | PLATFORM::CLockObject lock(m_mutex); | |
77 | if (m_tvInBuffer.IsEmpty() && m_inBuffer.IsEmpty() && | |
78 | !m_condition.Wait(m_mutex, m_bHasData, iTimeout)) | |
79 | return bReturn; | |
80 | ||
81 | if (m_tvInBuffer.Pop(command)) | |
82 | bReturn = true; | |
83 | else if (m_inBuffer.Pop(command)) | |
84 | bReturn = true; | |
85 | ||
86 | m_bHasData = !m_tvInBuffer.IsEmpty() || !m_inBuffer.IsEmpty(); | |
87 | return bReturn; | |
88 | } | |
89 | ||
90 | private: | |
91 | PLATFORM::CMutex m_mutex; | |
92 | PLATFORM::CCondition<volatile bool> m_condition; | |
93 | volatile bool m_bHasData; | |
94 | PLATFORM::SyncedBuffer<cec_command> m_tvInBuffer; | |
95 | PLATFORM::SyncedBuffer<cec_command> m_inBuffer; | |
96 | }; | |
97 | }; |