1 | /* Virginia Tech Cognitive Radio Open Source Systems |
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2 | * Virginia Tech, 2009 |
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3 | * |
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4 | * LICENSE INFORMATION GOES HERE |
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5 | */ |
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6 | |
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7 | /* This header exports the declarations for all VT-CROSS radio components. It |
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8 | * contains two pure abstract base classes, Component and Engine; Engine derives |
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9 | * from Component. All functions contained within the abstract base classes are |
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10 | * dynamically linked and pure, and all child non-abstract classes derive using |
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11 | * private inheritence. Class functions of the abstract base classes are public |
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12 | * for two reasons: (1) To allow for public/protected inheritence in other |
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13 | * implementations, (2) So that symbolic debuggers can navigate the call tree |
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14 | * for typecasted objects of derivative classes. |
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15 | */ |
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16 | |
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17 | #ifndef COMPONENTS_H |
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18 | #define COMPONENTS_H |
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19 | |
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20 | |
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21 | #include <stdint.h> |
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22 | #include <string> |
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23 | |
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24 | #include "containers.h" |
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25 | #include "socketcomm.h" |
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26 | |
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27 | |
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28 | /* Component abstract base class that all component classes should inherit from, |
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29 | * including cognitive and policy engines, and the service management layer. |
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30 | * Defines only functions required by all component types. |
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31 | */ |
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32 | class Component |
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33 | { |
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34 | public: |
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35 | /* Asks the component at the passed socket FD for its component type |
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36 | * string. Note that this implementation is global for all component |
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37 | * types, so is implemented here. Should a component need to override |
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38 | * it, that is possible via dynamic binding or overloading. |
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39 | */ |
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40 | virtual std::string GetRemoteComponentType(int32_t componentSocketFD) |
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41 | { |
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42 | SendMessage(componentSocketFD, "request_component_type"); |
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43 | |
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44 | char buffer[256]; |
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45 | memset(buffer, 0, 256); |
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46 | ReadMessage(componentSocketFD, buffer); |
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47 | |
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48 | return std::string(buffer); |
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49 | } |
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50 | |
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51 | |
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52 | /* Wait for a command signal containing task instructions. |
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53 | */ |
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54 | virtual void WaitForSignal() = 0; |
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55 | |
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56 | |
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57 | /* Completely shutdown the radio and all operations. |
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58 | */ |
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59 | virtual void Shutdown() = 0; |
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60 | |
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61 | |
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62 | /* Reset the radio and reload all configuration files. |
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63 | * |
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64 | * TODO are we remembering experiences in CEs? |
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65 | */ |
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66 | virtual void Reset() = 0; |
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67 | |
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68 | |
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69 | /* Register or deregister a component with the primary radio shell. |
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70 | */ |
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71 | virtual void RegisterComponent() = 0; |
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72 | virtual void DeregisterComponent() = 0; |
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73 | }; |
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74 | |
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75 | |
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76 | /* Engine abstract base class from which all engine component types should |
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77 | * inherit (e.g. cognitive and policy engines). Inherits all functions from the |
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78 | * ABC Component publically. |
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79 | */ |
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80 | class Engine : public Component |
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81 | { |
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82 | public: |
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83 | /* Register or deregister services that this engine provides with the |
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84 | * service management layer. |
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85 | */ |
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86 | virtual void RegisterServices() = 0; |
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87 | virtual void DeregisterServices() = 0; |
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88 | }; |
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89 | |
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90 | |
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91 | /* Service Management Layer (SML) class declaration. The functions listed here |
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92 | * are required by the VTCROSS API for service-oriented VTCROSS radio |
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93 | * architectures. |
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94 | */ |
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95 | class ServiceManagementLayer : public Component |
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96 | { |
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97 | public: |
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98 | ServiceManagementLayer(); |
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99 | ~ServiceManagementLayer(); |
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100 | |
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101 | void GetRemoteComponentType(); |
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102 | void WaitForSignal(); |
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103 | void Shutdown(); |
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104 | void Reset(); |
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105 | void RegisterComponent(); |
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106 | void DeregisterComponent(); |
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107 | |
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108 | private: |
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109 | /* Receive the radio configuration settings from the shell and pass them |
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110 | * on to another component. |
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111 | */ |
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112 | void TransferRadioConfiguration(); |
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113 | |
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114 | |
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115 | /* Receive information regarding a completed 'experience' and pass it on |
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116 | * to the appropriate cognitive engine. |
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117 | */ |
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118 | void TransferExperience(); |
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119 | |
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120 | |
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121 | /* Listen for other components registering their available services with |
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122 | * the SML. */ |
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123 | void ReceiveServices(); |
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124 | |
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125 | |
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126 | /* Change the active mission of the radio to a new one and adjust radio |
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127 | * behavoir appropriately. |
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128 | */ |
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129 | void SetActiveMission(); |
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130 | |
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131 | |
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132 | /* List all services provided to the radio by registered components. |
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133 | */ |
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134 | void ListServices(); |
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135 | |
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136 | |
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137 | /* Load/Relead the XML configuration file. |
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138 | */ |
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139 | void ReloadConfiguration(); |
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140 | void LoadConfiguration(); |
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141 | |
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142 | |
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143 | /* The socket file descriptor information for the shell which this SML |
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144 | * is connected to. |
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145 | */ |
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146 | int32_t shellSocketFD; |
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147 | }; |
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148 | |
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149 | |
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150 | /* Policy Engine class declaration. All public functions are inherited from |
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151 | * parent classes. |
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152 | */ |
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153 | class PolicyEngine : public Engine |
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154 | { |
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155 | public: |
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156 | PolicyEngine(); |
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157 | ~PolicyEngine(); |
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158 | |
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159 | |
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160 | /* Overloaded constructor that creates a policy engine object and |
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161 | * connects it to either the shell or an SML, depening on the SML bool. |
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162 | */ |
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163 | PolicyEngine(const char* serverName, const char* portNumber, \ |
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164 | const bool SML); |
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165 | |
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166 | void GetRemoteComponentType(); |
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167 | void WaitForSignal(); |
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168 | void Shutdown(); |
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169 | void Reset(); |
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170 | void RegisterComponent(); |
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171 | void DeregisterComponent(); |
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172 | |
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173 | void RegisterServices(); |
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174 | void DeregisterServices(); |
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175 | |
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176 | private: |
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177 | /* Parse and load/reload policies into the policy engine. |
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178 | */ |
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179 | void LoadPolicies(); |
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180 | void ReloadPolicies(); |
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181 | |
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182 | |
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183 | /* Return a decision made by the policy engine regarding a certain set |
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184 | * of transmission parameters. |
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185 | */ |
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186 | void SendPEDecision(struct Parameter pList[], struct CE_Info *ce_info, \ |
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187 | int32_t decision_array[]); |
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188 | |
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189 | |
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190 | /* Validate a set of transmission parameters received from the radio. |
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191 | */ |
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192 | void ValidateParameters(struct Parameter pList[], \ |
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193 | struct CE_Info *ce_info, int decision_array[]); |
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194 | |
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195 | |
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196 | /* The SML_present bool reflects whether or not the remote component |
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197 | * this object is connected to is an SML. If it isn't, then it must be |
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198 | * a shell. The socketFD stores the socket file descriptor for this |
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199 | * connection. |
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200 | */ |
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201 | bool SML_present; |
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202 | int32_t commandSocketFD; |
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203 | }; |
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204 | |
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205 | |
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206 | /* Cognitive Engine class declaration. All public functions are inherited from |
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207 | * parent classes. |
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208 | */ |
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209 | class CognitiveEngine : public Engine |
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210 | { |
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211 | public: |
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212 | CognitiveEngine(); |
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213 | ~CognitiveEngine(); |
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214 | |
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215 | void GetRemoteComponentType(); |
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216 | void WaitForSignal(); |
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217 | void Shutdown(); |
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218 | void Reset(); |
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219 | void RegisterComponent(); |
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220 | void DeregisterComponent(); |
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221 | |
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222 | void RegisterServices(); |
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223 | void DeregisterServices(); |
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224 | |
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225 | private: |
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226 | /* Receive the transmitted radio configuration from the radio itself |
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227 | * (the CE will not always be local to the radio). |
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228 | */ |
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229 | void ReceiveRadioConfiguration(); |
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230 | |
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231 | |
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232 | /* Receive an 'experience' report from the radio. |
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233 | */ |
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234 | void ReceiveExperience(); |
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235 | |
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236 | |
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237 | /* Find the most optimal set of transmission parameters given certain |
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238 | * observables and possibly a service if the SML component is present |
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239 | * and active. |
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240 | */ |
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241 | void GetSolution(Observable *observables); |
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242 | void GetSolution(Observable *observables, std::string service); |
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243 | |
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244 | |
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245 | /* Receive a feedback from the radio regarding the performance of a |
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246 | * certain set of parameters, possibly associated with a service. |
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247 | * |
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248 | * TODO what is the difference between experiences and feedback, |
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249 | * exactly? we should explain that explicitly here. |
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250 | */ |
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251 | void ReceiveFeedback(Observable *observables,\ |
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252 | Parameter *parameters, Utility *utilities); |
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253 | void ReceiveFeedback(Observable *observables, \ |
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254 | Parameter *parameters, std::string service); |
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255 | |
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256 | /* The SML_present bool reflects whether or not the remote component |
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257 | * this object is connected to is an SML. If it isn't, then it must be |
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258 | * a shell. The socketFD stores the socket file descriptor for this |
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259 | * connection. |
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260 | */ |
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261 | bool SML_present; |
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262 | int32_t commandSocketFD; |
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263 | }; |
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264 | |
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265 | #endif |
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