UOPstream.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2014 OpenFOAM Foundation
    Copyright (C) 2017-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::UOPstreamBase
 
Description
    Base class for output inter-processor communications stream
    (ie, parallel streams).
    Not to be used directly, thus contructors are protected.
 
SourceFiles
    UOPstreamBase.C
 
\*---------------------------------------------------------------------------*/
 
#include "Pstream.H"
 
#ifndef Foam_UOPstream_H
#define Foam_UOPstream_H
 
#include "UPstream.H"
#include "Ostream.H"
#include "DynamicList.H"
#include "PstreamBuffers.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                        Class UOPstreamBase Declaration
\*---------------------------------------------------------------------------*/
 
class UOPstreamBase
:
    public UPstream,
    public Ostream
{
    // Private Member Functions
 
        //- Prepare send buffer for count bytes of output,
        //- with specified alignment.
        inline void prepareBuffer(const size_t count, const size_t align);
 
        //- Generic write data to the send buffer, aligned by sizeof(T)
        template<class T>
        inline void writeToBuffer(const T& val);
 
        //- Write count bytes of data to the send buffer,
        //- using align byte alignment
        inline void writeToBuffer
        (
            const void* data,
            const size_t count,
            const size_t align
        );
 
        //- Add a single char to the send buffer. No alignment needed
        inline void putChar(const char c);
 
        //- Write string length and string content.
        //  The content includes the trailing nul char.
        inline void putString(const std::string& str);
 
 
protected:
 
    // Protected Data
 
        int toProcNo_;
 
        DynamicList<char>& sendBuf_;
 
        const int tag_;
 
        const label comm_;
 
        const bool sendAtDestruct_;
 
 
    // Protected Constructors
 
        //- Construct given process index to write to using the given
        //- attached send buffer, optional communication characteristics
        //- and IO format
        UOPstreamBase
        (
            const commsTypes commsType,
            const int toProcNo,
            DynamicList<char>& sendBuf,
            const int tag = UPstream::msgType(),
            const label comm = UPstream::worldComm,
            const bool sendAtDestruct = true,
            IOstreamOption::streamFormat fmt = IOstreamOption::BINARY
        );
 
        //- Construct given buffers
        UOPstreamBase(const int toProcNo, PstreamBuffers& buffers);
 
 
public:
 
    //- Destructor.
    virtual ~UOPstreamBase();
 
 
    // Member Functions
 
        // Inquiry
 
            //- Return flags of output stream
            virtual ios_base::fmtflags flags() const
            {
                return ios_base::fmtflags(0);
            }
 
 
        // Write Functions
 
            //- Write token to stream or otherwise handle it.
            //  \return false if the token type was not handled by this method
            virtual bool write(const token& tok);
 
            //- Write single character. Whitespace is suppressed.
            virtual Ostream& write(const char c);
 
            //- Write the word-characters of a character string.
            //  Sends as a single char, or as word.
            virtual Ostream& write(const char* str);
 
            //- Write word
            virtual Ostream& write(const word& str);
 
            //- Write string
            virtual Ostream& write(const string& str);
 
            //- Write std::string surrounded by quotes.
            //  Optional write without quotes.
            virtual Ostream& writeQuoted
            (
                const std::string& str,
                const bool quoted=true
            );
 
            //- Write int32_t as a label
            virtual Ostream& write(const int32_t val);
 
            //- Write int64_t as a label
            virtual Ostream& write(const int64_t val);
 
            //- Write floatScalar
            virtual Ostream& write(const floatScalar val);
 
            //- Write doubleScalar
            virtual Ostream& write(const doubleScalar val);
 
            //- Write binary block with 8-byte alignment.
            virtual Ostream& write(const char* data, std::streamsize count);
 
            //- Low-level raw binary output.
            virtual Ostream& writeRaw(const char* data, std::streamsize count);
 
            //- Begin marker for low-level raw binary output.
            //  The count indicates the number of bytes for subsequent
            //  writeRaw calls.
            virtual bool beginRawWrite(std::streamsize count);
 
            //- End marker for low-level raw binary output.
            virtual bool endRawWrite()
            {
                return true;
            }
 
            //- Add indentation characters
            virtual void indent()
            {}
 
 
        // Stream state functions
 
            //- Flush stream
            virtual void flush()
            {}
 
            //- Add newline and flush stream
            virtual void endl()
            {}
 
            //- Get the current padding character
            //  \return previous padding character
            virtual char fill() const
            {
                return 0;
            }
 
            //- Set padding character for formatted field up to field width
            virtual char fill(const char)
            {
                return 0;
            }
 
            //- Get width of output field
            virtual int width() const
            {
                return 0;
            }
 
            //- Set width of output field
            //  \return previous width
            virtual int width(const int)
            {
                 return 0;
            }
 
            //- Get precision of output field
            virtual int precision() const
            {
                 return 0;
            }
 
            //- Set precision of output field
            //  \return old precision
            virtual int precision(const int)
            {
                 return 0;
            }
 
 
    // Positioning
 
        //- Rewind the send buffer for overwriting
        virtual void rewind();
 
 
    // Edit
 
        //- Set flags of stream
        virtual ios_base::fmtflags flags(const ios_base::fmtflags)
        {
            return ios_base::fmtflags(0);
        }
 
 
    // Print
 
        //- Print stream description to Ostream
        void print(Ostream& os) const;
};
 
 
/*---------------------------------------------------------------------------*\
                          Class UOPstream Declaration
\*---------------------------------------------------------------------------*/
 
//- Output inter-processor communications stream
//- using MPI send/recv etc. - operating on external buffer.
class UOPstream
:
    public UOPstreamBase
{
    // Private Member Functions
 
        //- Final buffer send, called by destructor
        bool bufferIPCsend();
 
 
public:
 
    // Constructors
 
        //- Construct given process index to write to using the given
        //- attached send buffer, optional communication characteristics
        //- and IO format
        UOPstream
        (
            const commsTypes commsType,
            const int toProcNo,
            DynamicList<char>& sendBuf,
            const int tag = UPstream::msgType(),
            const label comm = UPstream::worldComm,
            const bool sendAtDestruct = true,
            IOstreamOption::streamFormat fmt = IOstreamOption::BINARY
        );
 
        //- Construct given buffers
        UOPstream(const int toProcNo, PstreamBuffers& buffers);
 
 
    //- Destructor, usually sends buffer on destruct.
    virtual ~UOPstream();
 
 
    // Member Functions
 
        //- Use all write methods from base class
        using UOPstreamBase::write;
 
 
    // Static Functions
 
        //- Write buffer contents to given processor
        //  \return True on success
        static bool write
        (
            const commsTypes commsType,
            const int toProcNo,
            const char* buf,
            const std::streamsize bufSize,
            const int tag = UPstream::msgType(),
            const label comm = UPstream::worldComm
        );
};
 
 
/*---------------------------------------------------------------------------*\
                         Class UOPBstream Declaration
\*---------------------------------------------------------------------------*/
 
//- Output inter-processor communications stream
//- using MPI broadcast - operating on external buffer.
//
// \note does not use commsType, tag etc.
class UOPBstream
:
    public UOPstreamBase
{
    // Private Member Functions
 
        //- Final buffer send, called by destructor
        bool bufferIPCsend();
 
 
public:
 
    // Constructors
 
        //- Construct given process index to write to using the given
        //- attached send buffer, optional communication characteristics
        //- and IO format
        UOPBstream
        (
            const commsTypes commsType,     
            const int toProcNo,             
            DynamicList<char>& sendBuf,
            const int tag = UPstream::msgType(),  
            const label comm = UPstream::worldComm,
            const bool sendAtDestruct = true,
            IOstreamOption::streamFormat fmt = IOstreamOption::BINARY
        );
 
 
    //- Destructor, usually sends buffer on destruct.
    virtual ~UOPBstream();
 
 
    // Member Functions
 
        //- Use all write methods from base
        using UOPstreamBase::write;
 
 
    // Static Functions
 
        //- Wrapped version of UPstream::broadcast with const-cast
        //  \return True on success
        static bool write
        (
            const commsTypes commsType,     
            const int rootProcNo,           
            const char* buf,
            const std::streamsize bufSize,
            const int tag = UPstream::msgType(),  
            const label comm = UPstream::worldComm
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //