1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
//
// 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 NVIDIA CORPORATION 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 ``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.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
// 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();
}
|