repositories / deb_libcec.git / blame
| Commit | Line | Data |
|---|---|---|
| cbbe90dd JB |
1 | #pragma once |
| 2 | /* | |
| 3 | * This file is part of the libCEC(R) library. | |
| 4 | * | |
| 5 | * libCEC(R) is Copyright (C) 2011-2013 Pulse-Eight Limited. All rights reserved. | |
| 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 | ||
| 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 | { | |
| 47 | Broadcast(); | |
| 48 | } | |
| 49 | ||
| 50 | void Broadcast(void) | |
| 51 | { | |
| 52 | PLATFORM::CLockObject lock(m_mutex); | |
| 53 | m_bHasData = true; | |
| 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 | }; |