//------------------------------------------------------------------------------
/*
    This file is part of Beast: https://github.com/vinniefalco/Beast
    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>

    Portions of this file are from JUCE.
    Copyright (c) 2013 - Raw Material Software Ltd.
    Please visit http://www.juce.com

    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#ifndef BEAST_NAMEDPIPE_H_INCLUDED
#define BEAST_NAMEDPIPE_H_INCLUDED

//==============================================================================
/**
    A cross-process pipe that can have data written to and read from it.

    Two processes can use NamedPipe objects to exchange blocks of data.

    @see InterprocessConnection
*/
class BEAST_API NamedPipe : LeakChecked <NamedPipe>, public Uncopyable
{
public:
    //==============================================================================
    /** Creates a NamedPipe. */
    NamedPipe();

    /** Destructor. */
    ~NamedPipe();

    //==============================================================================
    /** Tries to open a pipe that already exists.
        Returns true if it succeeds.
    */
    bool openExisting (const String& pipeName);

    /** Tries to create a new pipe.
        Returns true if it succeeds.
    */
    bool createNewPipe (const String& pipeName);

    /** Closes the pipe, if it's open. */
    void close();

    /** True if the pipe is currently open. */
    bool isOpen() const;

    /** Returns the last name that was used to try to open this pipe. */
    String getName() const;

    //==============================================================================
    /** Reads data from the pipe.

        This will block until another thread has written enough data into the pipe to fill
        the number of bytes specified, or until another thread calls the cancelPendingReads()
        method.

        If the operation fails, it returns -1, otherwise, it will return the number of
        bytes read.

        If timeOutMilliseconds is less than zero, it will wait indefinitely, otherwise
        this is a maximum timeout for reading from the pipe.
    */
    int read (void* destBuffer, int maxBytesToRead, int timeOutMilliseconds);

    /** Writes some data to the pipe.
        @returns the number of bytes written, or -1 on failure.
    */
    int write (const void* sourceBuffer, int numBytesToWrite, int timeOutMilliseconds);

private:
    //==============================================================================
    BEAST_PUBLIC_IN_DLL_BUILD (class Pimpl)
    ScopedPointer<Pimpl> pimpl;
    String currentPipeName;
    ReadWriteLock lock;

    bool openInternal (const String& pipeName, const bool createPipe);
};


#endif   // BEAST_NAMEDPIPE_H_INCLUDED