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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 "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 | }; |