88 lines
3.3 KiBLFS
C++
88 lines
3.3 KiBLFS
C++
/**
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* @file
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*
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* @author Max Lammers <max@senseglove.com>
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* @author Mamadou Babaei <mamadou@senseglove.com>
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*
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* @section LICENSE
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*
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* Copyright (c) 2020 - 2022 SenseGlove
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*
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* @section DESCRIPTION
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*
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* Utility Class used to write and read to/from IPC.
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* a.k.a. The (only) one with access to Boost::Interprocess.
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*/
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#pragma once
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#include <cstdint>
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#include <string>
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#include "Platform.hpp"
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namespace SGConnect
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{
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class SharedMem;
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}
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/// <summary> Utility Class used to write and read to/from IPC </summary>
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class SGConnect::SharedMem
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{
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public:
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///<summary> Shared Memory block containing number of devices and deviceInfo from each device </summary>
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[[nodiscard]] static const std::string& GetDevices();
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///<summary> Shared Memory block containing haptic commands from each device </summary>
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[[nodiscard]] static const std::string& GetHaptics();
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///<summary> Shared Memory block containing sensor data from each device </summary>
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[[nodiscard]] static const std::string& GetData();
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///<summary> Shared Memory block containing commands to be sent to the devices </summary>
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[[nodiscard]] static const std::string& GetInCommands();
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///<summary> Shared Memory block containing commands/responses from the devices </summary>
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[[nodiscard]] static const std::string& GetOutCommands();
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///<summary> Address in devices where the number of devices is stored. </summary>
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[[nodiscard]] static const std::string& GetNumDevices();
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///<summary> Address in devices where the scanner's processing id is stored. </summary>
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[[nodiscard]] static const std::string& GetScanActive();
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/// <summary> Data block containing Connection states & pared devices </summary>
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[[nodiscard]] static const std::string& GetConnectionsDebug();
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/// <summary> Address in connectionsDebug that shows connections, testers & states. </summary>
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[[nodiscard]] static const std::string& GetActiveConnections();
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///<summary> Delimiter to split data in Shared Memory </summary>
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[[nodiscard]] static char GetListDelimiter();
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///<summary> Standard size of Shared Memory. It works with this but could probably use a lower value. </summary>
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[[nodiscard]] static uint32_t GetStandardSize();
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public:
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///<summary> Write a string to Shared Memory at block-addess, but also creates one if it doesn't yet exist. Returns true if successful. </summary>
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static bool WriteTo(const std::string& block, const std::string& address, const std::string& value,
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uint32_t size = GetStandardSize());
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///<summary> Write a string to Shared Memory at block-addess, but don't create on if it doesn't exist. Returns true if successful. </summary>
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static bool WriteTo_NotCreate(const std::string& block, const std::string& address, const std::string& value);
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///<summary> Retrieve value from Shared Memory at block-address. Returns true if successful. </summary>
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static bool ReadFrom(const std::string& block, const std::string& address, std::string& out_value);
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///<summary> Dispose of a shared memory block so it no longer takes up space on the PC. Returns true if successful. </summary>
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static bool Dispose(const std::string& block);
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static bool TimeSinceLastUpdate(long& time);
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static bool UpdateTime();
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public:
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SharedMem() = delete;
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virtual ~SharedMem() = delete;
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}; |