kicad/eeschema/symbol_async_loader.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 Jon Evans <jon@craftyjon.com>
* Copyright (C) 2021-2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef KICAD_SYMBOL_ASYNC_LOADER_H
#define KICAD_SYMBOL_ASYNC_LOADER_H
#include <atomic>
#include <future>
#include <mutex>
#include <unordered_map>
#include <vector>
#include <wx/string.h>
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class LIB_SYMBOL;
class PROGRESS_REPORTER;
class SYMBOL_LIB_TABLE;
class SYMBOL_ASYNC_LOADER
{
public:
/**
* Constructs a loader for symbol libraries
* @param aNicknames is a list of library nicknames to load
* @param aTable is a pointer to the symbol library table to load libraries for
* @param aOnlyPowerSymbols, if true, will only return power symbols in the output map
* @param aOutput will be filled with the loaded parts
* @param aReporter will be used to repord progress, of not null
*/
SYMBOL_ASYNC_LOADER( const std::vector<wxString>& aNicknames,
SYMBOL_LIB_TABLE* aTable, bool aOnlyPowerSymbols = false,
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std::unordered_map<wxString, std::vector<LIB_SYMBOL*>>* aOutput = nullptr,
PROGRESS_REPORTER* aReporter = nullptr );
~SYMBOL_ASYNC_LOADER();
/**
* Spins up threads to load all the libraries in m_nicknames
*/
void Start();
/**
* Finalizes the threads and combines the output into the target output map
*/
bool Join();
///< Return true if loading is done
bool Done();
///< Returns a string containing any errors generated during the load
const wxString& GetErrors() const { return m_errors; }
///< Represents a pair of <nickname, loaded parts list>
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typedef std::pair<wxString, std::vector<LIB_SYMBOL*>> LOADED_PAIR;
private:
///< Worker job that loads libraries and returns a list of pairs of <nickname, loaded parts>
std::vector<LOADED_PAIR> worker();
///< list of libraries to load
std::vector<wxString> m_nicknames;
///< Handle to the symbol library table being loaded into
SYMBOL_LIB_TABLE* m_table;
///< True if we are loading only power symbols
bool m_onlyPowerSymbols;
///< Handle to map that will be filled with the loaded parts per library
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std::unordered_map<wxString, std::vector<LIB_SYMBOL*>>* m_output;
///< Progress reporter (may be null)
PROGRESS_REPORTER* m_reporter;
size_t m_threadCount;
std::atomic<size_t> m_nextLibrary;
wxString m_errors;
std::mutex m_errorMutex;
std::vector<std::future<std::vector<LOADED_PAIR>>> m_returns;
};
#endif