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/*===========================================================================
FILE:
ProtocolBuffer.cpp
DESCRIPTION:
Generic protocol structures and affliated methods
PUBLIC CLASSES AND METHODS:
sProtocolBuffer
Simple struct to represent a protocol buffer using a reference counted
(shared) buffer, this allows us to use in in several places without
copying it once in each place. A few base services are provided
but the main purpose is to provide a class to inherit off of for
specific protocols
Copyright (c) 2013, The Linux Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of The Linux Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
===========================================================================*/
//---------------------------------------------------------------------------
// Include Files
//---------------------------------------------------------------------------
#include "StdAfx.h"
#include "ProtocolBuffer.h"
//---------------------------------------------------------------------------
// Definitions
//---------------------------------------------------------------------------
/*=========================================================================*/
// sProtocolBuffer Methods
/*=========================================================================*/
/*===========================================================================
METHOD:
sProtocolBuffer (Public Method)
DESCRIPTION:
Constructor (default)
RETURN VALUE:
None
===========================================================================*/
sProtocolBuffer::sProtocolBuffer()
: mpData( 0 ),
mbValid( false )
{
// Object is currently invalid
mTimestamp = EMPTY_TIME;
}
/*===========================================================================
METHOD:
sProtocolBuffer (Public Method)
DESCRIPTION:
Constructor (parameterized)
PARAMETERS:
pBuffer [ I ] - Shareable buffer that contains the DIAG data
RETURN VALUE:
None
===========================================================================*/
sProtocolBuffer::sProtocolBuffer( sSharedBuffer * pBuffer )
: mpData( 0 ),
mbValid( false )
{
mTimestamp = EMPTY_TIME;
time_t rawtime;
time( &rawtime );
tm * timestamp = localtime( &rawtime );
if (timestamp != 0)
{
mTimestamp = *timestamp;
}
if (mpData != 0 && mpData->IsValid() == true)
{
mpData->Release();
mpData = 0;
}
mpData = pBuffer;
if (mpData != 0 && mpData->IsValid() == true)
{
mpData->AddRef();
}
else
{
mpData = 0;
}
// NOTE: Derived classes need to call their own validation method
// in their constructors since the override might try to access
// data that is not yet in place
sProtocolBuffer::Validate();
}
/*===========================================================================
METHOD:
sProtocolBuffer (Public Method)
DESCRIPTION:
Copy constructor
PARAMETERS:
copyThis [ I ] - sProtocolBuffer to base the new one on
RETURN VALUE:
None
===========================================================================*/
sProtocolBuffer::sProtocolBuffer( const sProtocolBuffer & copyThis )
: mpData( copyThis.mpData ),
mTimestamp( copyThis.mTimestamp ),
mbValid( copyThis.mbValid )
{
// Bump reference count for shared buffer
if (mpData != 0 && mpData->IsValid() == true)
{
mpData->AddRef();
}
else
{
mpData = 0;
mbValid = false;
}
}
/*===========================================================================
METHOD:
operator = (Public Method)
DESCRIPTION:
Assignment operator
PARAMETERS:
copyThis [ I ] - sProtocolBuffer to base the new one on
RETURN VALUE:
sProtocolBuffer &
===========================================================================*/
sProtocolBuffer & sProtocolBuffer::operator = ( const sProtocolBuffer & copyThis )
{
// Do we already have data?
if (mpData != 0)
{
// Is it different than what we are duplicating?
if (mpData != copyThis.mpData)
{
// Yes, release our current buffer
mpData->Release();
}
}
mpData = copyThis.mpData;
mTimestamp = copyThis.mTimestamp;
mbValid = copyThis.mbValid;
// Bump reference count for shared buffer
if (mpData != 0 && mpData->IsValid() == true)
{
mpData->AddRef();
}
else
{
mpData = 0;
mbValid = false;
}
return *this;
}
/*===========================================================================
METHOD:
~sProtocolBuffer (Public Method)
DESCRIPTION:
Destructor
RETURN VALUE:
None
===========================================================================*/
sProtocolBuffer::~sProtocolBuffer()
{
if (mpData != 0 && mpData->IsValid() == true)
{
mpData->Release();
mpData = 0;
}
else if (mpData != 0)
{
ASSERT( 0 );
}
mbValid = false;
}
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