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/*
* Copyright (c) 2008-2017, NVIDIA CORPORATION. All rights reserved.
*
* NVIDIA CORPORATION and its licensors retain all intellectual property
* and proprietary rights in and to this software, related documentation
* and any modifications thereto. Any use, reproduction, disclosure or
* distribution of this software and related documentation without an express
* license agreement from NVIDIA CORPORATION is strictly prohibited.
*/
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#include "AgMMFile.h"
using namespace nvidia;
AgMMFile::AgMMFile():
mAddr(0), mSize(0), mFileH(0)
{}
AgMMFile::AgMMFile(char *name, unsigned int size, bool &alreadyExists)
{
this->create(name, size, alreadyExists);
}
void AgMMFile::create(char *name, unsigned int size, bool &alreadyExists)
{
alreadyExists = false;
mSize = size;
mFileH = CreateFileMapping(INVALID_HANDLE_VALUE, // use paging file
NULL, // default security
PAGE_READWRITE, // read/write access
0, // buffer size (upper 32bits)
mSize, // buffer size (lower 32bits)
name); // name of mapping object
if (mFileH == NULL || mFileH == INVALID_HANDLE_VALUE)
{
mSize=0;
mAddr=0;
return;
}
if (ERROR_ALREADY_EXISTS == GetLastError())
{
alreadyExists = true;
}
mAddr = MapViewOfFile(mFileH, // handle to map object
FILE_MAP_READ|FILE_MAP_WRITE, // read/write permission
0,
0,
mSize);
if (mFileH == NULL || mAddr == NULL)
{
mSize=0;
mAddr=0;
return;
}
}
void AgMMFile::destroy()
{
if (!mAddr || !mFileH || !mSize)
return;
UnmapViewOfFile(mAddr);
CloseHandle(mFileH);
mAddr = 0;
mFileH = 0;
mSize = 0;
}
AgMMFile::~AgMMFile()
{
destroy();
}
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