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1 /*
2  * Copyright (c) 2011-2015, Intel Corporation
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without modification,
6  * are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice, this
9  * list of conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright notice,
12  * this list of conditions and the following disclaimer in the documentation and/or
13  * other materials provided with the distribution.
14  *
15  * 3. Neither the name of the copyright holder nor the names of its contributors
16  * may be used to endorse or promote products derived from this software without
17  * specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 #pragma once
31 
32 #include "parameter_export.h"
33 
34 #include "Syncer.h"
35 #include <log/Logger.h>
36 
37 #include <stdint.h>
38 #include <string>
39 
40 class CInstanceConfigurableElement;
41 class CMappingContext;
42 class CSubsystem;
43 
44 class PARAMETER_EXPORT CSubsystemObject : private ISyncer
45 {
46 public:
47     CSubsystemObject(CInstanceConfigurableElement *pInstanceConfigurableElement,
48                      core::log::Logger &logger);
49     ~CSubsystemObject() override;
50 
51     /**
52      * Return the mapping value of the SubystemObject.
53      *
54      * @return A std::string containing the mapping value
55      */
56     virtual std::string getFormattedMappingValue() const;
57 
58     // Configurable element retrieval
59     const CInstanceConfigurableElement *getConfigurableElement() const;
60 
61 protected:
62     /** FIXME: plugins should not have direct access to blackboard memory.
63      *         Ie: This method should be removed or return a abstracted iterator.
64      */
65     uint8_t *getBlackboardLocation() const;
66     // Size
67     size_t getSize() const;
68 
69     /**
70      * Conversion of int8, int16, int32 to int (taking care of sign extension)
71      *
72      * @param[in] instanceConfigurableElement pointer to configurable element instance
73      * @param[in] sizeOptimizedData data to convert
74      *
75      * @return the data converted to int
76      */
77     int toPlainInteger(const CInstanceConfigurableElement *instanceConfigurableElement,
78                        int sizeOptimizedData);
79 
80     // Sync to/from HW
81     virtual bool sendToHW(std::string &strError);
82     virtual bool receiveFromHW(std::string &strError);
83     // Fall back HW access
84     virtual bool accessHW(bool bReceive, std::string &strError);
85     // Blackboard access from subsystems
86     void blackboardRead(void *pvData, size_t size);
87     void blackboardWrite(const void *pvData, size_t size);
88     // Belonging Subsystem retrieval
89     const CSubsystem *getSubsystem() const;
90 
91     /** Logging methods
92      *@{
93      */
info()94     core::log::details::Info info() const { return _logger.info(); }
warning()95     core::log::details::Warning warning() const { return _logger.warning(); }
96     /* @} */
97 
98 private:
99     // from ISyncer
100     /** This method is not supposed to be overridden by plugins
101      *  as if not called, plugins will not work (sets _blackboard).
102      */
103     bool sync(CParameterBlackboard &parameterBlackboard, bool bBack, std::string &strError) final;
104 
105     // Default back synchronization
106     void setDefaultValues(CParameterBlackboard &parameterBlackboard) const;
107 
108     /** @return the offset in the main blackboard of the sync values. */
109     size_t getOffset() const;
110 
111     // Prevent unsupported operators
112     CSubsystemObject(const CSubsystemObject &);
113 
114     // Define affection operator
115     const CSubsystemObject &operator=(const CSubsystemObject &);
116 
117     /** Application Logger */
118     core::log::Logger &_logger;
119 
120     // Instance element to sync from/to
121     CInstanceConfigurableElement *_pInstanceConfigurableElement;
122     // Data size
123     size_t _dataSize;
124     // Blackboard data location
125     CParameterBlackboard *_blackboard{nullptr};
126     // Accessed index for Subsystem read/write from/to blackboard
127     size_t _accessedIndex{0};
128 };
129