| 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 "lib/platform/threads/mutex.h" |
| 35 | |
| 36 | namespace CEC |
| 37 | { |
| 38 | using namespace PLATFORM; |
| 39 | |
| 40 | class CAdapterMessageQueueEntry |
| 41 | { |
| 42 | public: |
| 43 | CAdapterMessageQueueEntry(const cec_command &command) |
| 44 | : m_bWaiting(true), m_retval((uint32_t)-1), m_bSucceeded(false) |
| 45 | { |
| 46 | m_hash = hashValue( |
| 47 | uint32_t(command.opcode_set ? command.opcode : CEC_OPCODE_NONE), |
| 48 | command.initiator, command.destination); |
| 49 | } |
| 50 | |
| 51 | virtual ~CAdapterMessageQueueEntry(void) {} |
| 52 | |
| 53 | /*! |
| 54 | * @brief Query result from worker thread |
| 55 | */ |
| 56 | uint32_t Result() const |
| 57 | { |
| 58 | return m_retval; |
| 59 | } |
| 60 | |
| 61 | /*! |
| 62 | * @brief Signal waiting threads |
| 63 | */ |
| 64 | void Broadcast(void) |
| 65 | { |
| 66 | CLockObject lock(m_mutex); |
| 67 | m_condition.Broadcast(); |
| 68 | } |
| 69 | |
| 70 | /*! |
| 71 | * @brief Signal waiting thread(s) when message matches this entry |
| 72 | */ |
| 73 | bool CheckMatch(uint32_t opcode, cec_logical_address initiator, |
| 74 | cec_logical_address destination, uint32_t response) |
| 75 | { |
| 76 | uint32_t hash = hashValue(opcode, initiator, destination); |
| 77 | |
| 78 | if (hash == m_hash) |
| 79 | { |
| 80 | CLockObject lock(m_mutex); |
| 81 | |
| 82 | m_retval = response; |
| 83 | m_bSucceeded = true; |
| 84 | m_condition.Signal(); |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | return false; |
| 89 | } |
| 90 | |
| 91 | /*! |
| 92 | * @brief Wait for a response to this command. |
| 93 | * @param iTimeout The timeout to use while waiting. |
| 94 | * @return True when a response was received before the timeout passed, false otherwise. |
| 95 | */ |
| 96 | bool Wait(uint32_t iTimeout) |
| 97 | { |
| 98 | CLockObject lock(m_mutex); |
| 99 | |
| 100 | bool bReturn = m_bSucceeded ? true : m_condition.Wait(m_mutex, m_bSucceeded, iTimeout); |
| 101 | m_bWaiting = false; |
| 102 | return bReturn; |
| 103 | } |
| 104 | |
| 105 | /*! |
| 106 | * @return True while a thread is waiting for a signal or isn't waiting yet, false otherwise. |
| 107 | */ |
| 108 | bool IsWaiting(void) |
| 109 | { |
| 110 | CLockObject lock(m_mutex); |
| 111 | return m_bWaiting; |
| 112 | } |
| 113 | |
| 114 | /*! |
| 115 | * @return Hash value for given cec_command |
| 116 | */ |
| 117 | static uint32_t hashValue(uint32_t opcode, |
| 118 | cec_logical_address initiator, |
| 119 | cec_logical_address destination) |
| 120 | { |
| 121 | return 1 | ((uint32_t)initiator << 8) | |
| 122 | ((uint32_t)destination << 16) | ((uint32_t)opcode << 16); |
| 123 | } |
| 124 | |
| 125 | private: |
| 126 | bool m_bWaiting; /**< true while a thread is waiting or when it hasn't started waiting yet */ |
| 127 | PLATFORM::CCondition<bool> m_condition; /**< the condition to wait on */ |
| 128 | PLATFORM::CMutex m_mutex; /**< mutex for changes to this class */ |
| 129 | uint32_t m_hash; |
| 130 | uint32_t m_retval; |
| 131 | bool m_bSucceeded; |
| 132 | }; |
| 133 | |
| 134 | }; |