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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
//************************************************************************
/**
* Class definitions for FastOS_UNIX_Application.
*
* @author Div, Oivind H. Danielsen
*/
#pragma once
#include "types.h"
#include "app.h"
class FastOS_UNIX_ProcessStarter;
class FastOS_UNIX_IPCHelper;
class FastOS_UNIX_Process;
/**
* This is the generic UNIX implementation of @ref FastOS_ApplicationInterface
*/
class FastOS_UNIX_Application : public FastOS_ApplicationInterface
{
private:
FastOS_UNIX_Application(const FastOS_UNIX_Application&);
FastOS_UNIX_Application& operator=(const FastOS_UNIX_Application&);
FastOS_UNIX_ProcessStarter *_processStarter;
FastOS_UNIX_IPCHelper *_ipcHelper;
protected:
bool PreThreadInit () override;
public:
FastOS_UNIX_Application ();
virtual ~FastOS_UNIX_Application();
/**
* Parse program arguments. @ref GetOpt() incrementally parses the
* command line argument list and returns the next known option
* character. An option character is known if it has been
* specified in the string of accepted option characters,
* [optionsString].
*
* The option string [optionsString] may contain the following
* elements: individual characters, and characters followed by a
* colon to indicate an option argument is to follow. For example,
* an option string "x" recognizes an option ``-x'', and an option
* string "x:" recognizes an option and argument ``-x argument''.
* It does not matter to @ref GetOpt() if a following argument has
* leading white space.
*
* @ref GetOpt() returns -1 when the argument list is exhausted, or
* `?' if a non-recognized option is encountered. The
* interpretation of options in the argument list may be canceled
* by the option `--' (double dash) which causes getopt() to signal
* the end of argument processing and return -1. When all options
* have been processed (i.e., up to the first non-option argument),
* getopt() returns -1.
*
* @ref GetOpt() should only be run by a single thread at the same
* time. In order to evaluate the argument list multiple times, the
* previous GetOpt loop must be finished (-1 returned).
*/
int GetOpt (const char *optionsString, const char* &optionArgument, int &optionIndex);
int GetOptLong(const char *optionsString, const char* &optionArgument, int &optionIndex,
const struct option *longopts, int *longindex);
/**
* Called before calling GetOpt() or GetOptLong() by sub-applications.
*/
static void resetOptIndex(int OptionIndex);
FastOS_UNIX_ProcessStarter *GetProcessStarter ();
bool Init () override;
void Cleanup () override;
void AddToIPCComm (FastOS_UNIX_Process *process);
void RemoveFromIPCComm (FastOS_UNIX_Process *process);
};
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