FileMonitor.h
author František Kučera <franta-hg@frantovo.cz>
Sat, 02 Dec 2023 21:25:02 +0100
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private Impl class also for the Shark
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/**
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 * ShaderShark
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 * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, version 3 of the License.
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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, see <http://www.gnu.org/licenses/>.
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 */
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#pragma once
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#include <string>
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#include <memory>
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class FileMonitor;
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class WatchedFile {
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public:
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	WatchedFile();
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	virtual ~WatchedFile();
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	std::string getFileName() const;
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	uint32_t getMask() const;
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	FileMonitor getFileMonitor() const;
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private:
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	class Impl;
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	std::shared_ptr<Impl> impl;
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	friend FileMonitor;
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};
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class FileEvent {
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public:
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	std::string fileName;
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	uint32_t mask;
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	// TODO: more information, see: man 7 inotify
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};
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class FileMonitor {
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public:
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	FileMonitor();
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	virtual ~FileMonitor();
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	/**
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	 * @return file descriptor that can be monitored by e.g. epoll
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	 */
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	int getFD() const;
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	/**
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	 * @param fileName file to be monitored
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	 * @param mask IN_CLOSE_WRITE and other IN_*
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	 * @return monitoring will continue until any copy of this object exists
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	 */
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	WatchedFile watch(const std::string& fileName);
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	WatchedFile watch(const std::string& fileName, uint32_t mask);
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	/**
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	 * @param event object to be filled with information
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	 * @return true if event was filled, call this method until false returned
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	 */
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	bool readEvent(FileEvent& event);
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	class Impl;
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	std::shared_ptr<Impl> impl;
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	FileMonitor(std::shared_ptr<Impl> impl);
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	friend WatchedFile;
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};