146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015 Mark Roszko <mark.roszko@gmail.com>
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* Copyright (C) 2016 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
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* Copyright (C) 2015-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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// kicad_curl.h must be included before wx headers, to avoid
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// conflicts for some defines, at least on Windows
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#include <kicad_curl/kicad_curl.h>
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#include <mutex>
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#include <ki_exception.h> // THROW_IO_ERROR
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// These are even more private than class members, and since there is only
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// one instance of KICAD_CURL ever, these statics are hidden here to simplify the
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// client (API) header file.
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static volatile bool s_initialized;
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static std::mutex s_lock; // for s_initialized
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/// At process termination, using atexit() keeps the CURL stuff out of the
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/// singletops and PGM_BASE.
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static void at_terminate()
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{
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KICAD_CURL::Cleanup();
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}
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void KICAD_CURL::Init()
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{
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// We test s_initialized twice in an effort to avoid
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// unnecessarily locking s_lock. This understands that the common case
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// will not need to lock.
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if( !s_initialized )
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{
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std::lock_guard<std::mutex> lock( s_lock );
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if( !s_initialized )
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{
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if( curl_global_init( CURL_GLOBAL_ALL ) != CURLE_OK )
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{
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THROW_IO_ERROR( "curl_global_init() failed." );
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}
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s_initialized = true;
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}
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}
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}
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void KICAD_CURL::Cleanup()
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{
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/*
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Calling lock_guard() from a static destructor will typically be bad, since the
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s_lock may already have been statically destroyed itself leading to a boost
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exception. (Remember C++ does not provide certain sequencing of static
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destructor invocation.)
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To prevent this we test s_initialized twice, which ensures that the lock_guard
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is only instantiated on the first call, which should be from
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PGM_BASE::destroy() which is first called earlier than static destruction.
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Then when called again from the actual PGM_BASE::~PGM_BASE() function,
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lock_guard will not be instantiated because s_initialized will be false.
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*/
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if( s_initialized )
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{
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std::lock_guard<std::mutex> lock( s_lock );
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if( s_initialized )
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{
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curl_global_cleanup();
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atexit( &at_terminate );
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s_initialized = false;
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}
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}
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}
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std::string KICAD_CURL::GetSimpleVersion()
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{
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if( !s_initialized )
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Init();
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curl_version_info_data* info = curl_version_info( CURLVERSION_NOW );
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std::string res;
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if( info->version )
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{
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res += "libcurl version: " + std::string( info->version );
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}
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res += " (";
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if( info->features & CURL_VERSION_SSL )
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{
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res += "with SSL - ";
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res += std::string( info->ssl_version );
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}
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else
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{
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res += "without SSL";
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}
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res += ")";
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return res;
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}
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std::string GetKicadCurlVersion()
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{
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return KICAD_CURL::GetVersion();
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}
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std::string GetCurlLibVersion()
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{
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return LIBCURL_VERSION;
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}
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