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2e1394149b
* Fixes of bugs from ASAN warnings, part one * MQC as static library, with nifty counter for global map and mutex * Switch clang to 16 * link messageqcpp to execplan
129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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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; version 2 of
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the License.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#pragma once
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#include <string>
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#include <map>
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#include <vector>
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#include <stdexcept>
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#include "IDBDataFile.h"
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namespace idbdatafile
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{
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class FileFactoryBase;
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class IDBFileSystem;
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struct FileFactoryEnt
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{
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FileFactoryEnt(IDBDataFile::Types t, const std::string& n, FileFactoryBase* f, IDBFileSystem* fs)
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: type(t), name(n), factory(f), filesystem(fs)
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{
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;
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}
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FileFactoryEnt(const FileFactoryEnt&) = delete;
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FileFactoryEnt& operator=(const FileFactoryEnt&) = delete;
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FileFactoryEnt& operator=(FileFactoryEnt&&) = delete;
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FileFactoryEnt(FileFactoryEnt&& temporary)
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: factory(temporary.factory)
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, filesystem(temporary.filesystem)
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{
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temporary.factory = nullptr;
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temporary.filesystem = nullptr;
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}
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~FileFactoryEnt();
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IDBDataFile::Types type = IDBDataFile::UNKNOWN;
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std::string name = "unknown";
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FileFactoryBase* factory = nullptr;
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IDBFileSystem* filesystem = nullptr;
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};
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typedef FileFactoryEnt (*FileFactoryEntryFunc)();
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/**
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* IDBFactory manages the factory plugins that know how to create
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* files of different types. The plugin architecture allows IDB
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* to defer dependencies until plugin load. This class is a static
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* class and is threadsafe.
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*
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*/
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class IDBFactory
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{
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public:
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/**
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* This method installs the default plugs for Buffered and Unbuffered files.
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* It is called automatically from the IDBPolicy::init() body so that clients
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* don't have to worry about it.
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*/
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static bool installDefaultPlugins();
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/**
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* This method installs a dynamic plugin. The plugin argument must refer
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* to a ".so" file that exposes an extern "C" functions:
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* FileFactoryEnt plugin_instance()
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*/
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static bool installPlugin(const std::string& plugin);
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/**
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* This method lists the loaded plugins by type.
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*/
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static std::vector<IDBDataFile::Types> listPlugins();
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/**
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* This method calls the Factory for the specified type
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*/
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static IDBDataFile* open(IDBDataFile::Types type, const char* fname, const char* mode, unsigned opts,
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unsigned colWidth);
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/**
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* This retrieves the IDBFileSystem for the specified type
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*/
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static IDBFileSystem& getFs(IDBDataFile::Types type);
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/**
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* This retrieves the IDBFileSystem for the specified type
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*/
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static const std::string& name(IDBDataFile::Types type);
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private:
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typedef std::map<IDBDataFile::Types, FileFactoryEnt> FactoryMap;
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typedef FactoryMap::const_iterator FactoryMapCIter;
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static FactoryMap s_plugins;
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IDBFactory() = delete;
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~IDBFactory() = delete;
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};
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inline const std::string& IDBFactory::name(IDBDataFile::Types type)
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{
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if (s_plugins.find(type) == s_plugins.end())
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{
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throw std::runtime_error("unknown plugin type in IDBFactory::name");
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}
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return s_plugins.at(type).name;
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}
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} // namespace idbdatafile
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