//
// Process_UNIX.h
//
// Library: Foundation
// Package: Processes
// Module:  Process
//
// Definition of the ProcessImpl class for Unix.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_Process_UNIX_INCLUDED
#define Foundation_Process_UNIX_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Event.h"
#include "Poco/RefCountedObject.h"
#include <unistd.h>
#include <vector>
#include <map>
#include <atomic>


namespace Poco {


class Pipe;


class Foundation_API ProcessHandleImpl: public RefCountedObject
{
public:
	ProcessHandleImpl(pid_t pid);
	~ProcessHandleImpl() override;

	pid_t id() const;
	int wait() const;
	int wait(int options) const;
	int tryWait() const;
	bool isRunning() const;

private:
	static int statusToExitCode(int status);
	const pid_t _pid;
	mutable Event _event;
	mutable std::atomic<int> _status{0};
	mutable std::atomic<bool> _hasStatus{false};
};


class Foundation_API ProcessImpl
{
public:
	using PIDImpl = pid_t;
	using ArgsImpl = std::vector<std::string>;
	using EnvImpl = std::map<std::string, std::string>;

	static PIDImpl idImpl();
	static void timesImpl(long& userTime, long& kernelTime);
	static void timesMicrosecondsImpl(Poco::Int64& userTime, Poco::Int64& kernelTime);
	static ProcessHandleImpl* launchImpl(
		const std::string& command,
		const ArgsImpl& args,
		const std::string& initialDirectory,
		Pipe* inPipe,
		Pipe* outPipe,
		Pipe* errPipe,
		const EnvImpl& env,
		int options = 0);
	static void killImpl(ProcessHandleImpl& handle);
	static void killImpl(PIDImpl pid);
	static bool isRunningImpl(const ProcessHandleImpl& handle);
	static bool isRunningImpl(PIDImpl pid);
	static void requestTerminationImpl(PIDImpl pid);

private:
	static ProcessHandleImpl* launchByForkExecImpl(
		const std::string& command,
		const ArgsImpl& args,
		const std::string& initialDirectory,
		Pipe* inPipe,
		Pipe* outPipe,
		Pipe* errPipe,
		const EnvImpl& env,
		int options = 0);
};


} // namespace Poco


#endif // Foundation_Process_UNIX_INCLUDED
