kicad/eeschema/symbol_async_loader.cpp

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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 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/>.
*/
#include <thread>
#include <core/wx_stl_compat.h>
#include <symbol_async_loader.h>
#include <symbol_lib_table.h>
#include <progress_reporter.h>
SYMBOL_ASYNC_LOADER::SYMBOL_ASYNC_LOADER( const std::vector<wxString>& aNicknames,
SYMBOL_LIB_TABLE* aTable, bool aOnlyPowerSymbols,
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std::unordered_map<wxString, std::vector<LIB_SYMBOL*>>* aOutput,
PROGRESS_REPORTER* aReporter ) :
m_nicknames( aNicknames ),
m_table( aTable ),
m_onlyPowerSymbols( aOnlyPowerSymbols ),
m_output( aOutput ),
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m_reporter( aReporter ),
m_nextLibrary( 0 ),
m_canceled( false )
{
wxASSERT( m_table );
m_threadCount = std::max<size_t>( 1, std::thread::hardware_concurrency() - 1 );
m_returns.resize( m_threadCount );
}
SYMBOL_ASYNC_LOADER::~SYMBOL_ASYNC_LOADER()
{
Abort();
}
void SYMBOL_ASYNC_LOADER::Start()
{
for( size_t ii = 0; ii < m_threadCount; ++ii )
m_returns[ii] = std::async( std::launch::async, &SYMBOL_ASYNC_LOADER::worker, this );
}
bool SYMBOL_ASYNC_LOADER::Join()
{
for( size_t ii = 0; ii < m_threadCount; ++ii )
{
if( !m_returns[ii].valid() )
continue;
m_returns[ii].wait();
const std::vector<LOADED_PAIR>& ret = m_returns[ii].get();
if( m_output && !ret.empty() )
{
for( const LOADED_PAIR& pair : ret )
{
// Don't show libraries that had no power symbols
if( m_onlyPowerSymbols && pair.second.empty() )
continue;
// *Do* show empty libraries in the normal case
m_output->insert( pair );
}
}
}
return true;
}
void SYMBOL_ASYNC_LOADER::Abort()
{
m_canceled.store( true );
Join();
}
bool SYMBOL_ASYNC_LOADER::Done()
{
return m_nextLibrary.load() >= m_nicknames.size();
}
std::vector<SYMBOL_ASYNC_LOADER::LOADED_PAIR> SYMBOL_ASYNC_LOADER::worker()
{
std::vector<LOADED_PAIR> ret;
bool onlyPower = m_onlyPowerSymbols;
for( size_t libraryIndex = m_nextLibrary++; libraryIndex < m_nicknames.size();
libraryIndex = m_nextLibrary++ )
{
if( m_canceled.load() )
break;
const wxString& nickname = m_nicknames[libraryIndex];
LOADED_PAIR pair( nickname, {} );
try
{
m_table->LoadSymbolLib( pair.second, nickname, onlyPower );
ret.emplace_back( std::move( pair ) );
}
catch( const IO_ERROR& ioe )
{
wxString msg = wxString::Format( _( "Error loading symbol library %s.\n\n%s\n" ),
nickname, ioe.What() );
std::lock_guard<std::mutex> lock( m_errorMutex );
m_errors += msg;
}
if( m_reporter )
m_reporter->AdvancePhase( wxString::Format( _( "Loading library %s..." ), nickname ) );
}
return ret;
}