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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=============================================================
**
** Source: MapViewOfFile.c
**
** Purpose: Positive test the MapViewOfFile API.
** Call MapViewOfFile with access FILE_MAP_WRITE.
**
** Depends: CreateFile,
** GetFileSize,
** memset,
** CreateFileMapping,
** CloseHandle,
** memcpy,
** ReadFile,
** memcmp,
** UnMapViewOfFile.
**
**
**============================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char *argv[])
{
HANDLE hFile;
HANDLE hFileMapping;
LPVOID lpMapViewAddress;
char buf[] = "this is a test string";
const int MAPPINGSIZE = 2048;
char ch[2048];
char readString[2048];
char lpFileName[] = "test.tmp";
DWORD dwBytesRead;
DWORD dwInitialSize = 0;
DWORD dwFinalSize = 0;
BOOL bRetVal;
/* Initialize the PAL environment.
*/
if(0 != PAL_Initialize(argc, argv))
{
return FAIL;
}
/* Create a file handle with CreateFile.
*/
hFile = CreateFile( lpFileName,
GENERIC_WRITE|GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
Fail("ERROR: %u :unable to create file \"%s\".\n",
GetLastError(),
lpFileName);
}
/* Get the initial size of file, for latter tests.
*/
dwInitialSize = GetFileSize (hFile, NULL);
if ( dwInitialSize == INVALID_FILE_SIZE )
{
Fail("ERROR:%u: The created file \"%s\" has an invalid "
"file size.\n",
GetLastError(),
lpFileName);
}
/* Initialize the buffers.
*/
memset(ch, 0, MAPPINGSIZE);
memset(readString, 0, MAPPINGSIZE);
/* Create a unnamed file-mapping object with file handle FileHandle
* and with PAGE_READWRITE protection.
*/
hFileMapping = CreateFileMapping(
hFile,
NULL, /*not inherited*/
PAGE_READWRITE, /*read and wite*/
0, /*high-order of object size*/
MAPPINGSIZE, /*low-orger of object size*/
NULL); /*unnamed object*/
if(NULL == hFileMapping)
{
Trace("ERROR:%u: Failed to create File Mapping.\n",
GetLastError());
CloseHandle(hFile);
Fail("");
}
/* maps a view of a file into the address space of the calling process.
*/
lpMapViewAddress = MapViewOfFile(
hFileMapping,
FILE_MAP_WRITE, /* access code */
0, /*high order offset*/
0, /*low order offset*/
MAPPINGSIZE); /* number of bytes for map */
if(NULL == lpMapViewAddress)
{
Trace("ERROR:%u: Failed to call MapViewOfFile API to map a view"
" of file!\n",
GetLastError());
CloseHandle(hFile);
CloseHandle(hFileMapping);
Fail("");
}
/* Verify that the size of the file has increased to
* accomidate the MapView.
*/
dwFinalSize = GetFileSize (hFile, NULL);
if ( (dwFinalSize <= dwInitialSize) && (dwFinalSize != MAPPINGSIZE))
{
CloseHandle(hFile);
CloseHandle(hFileMapping);
Fail("ERROR: Size of the file was expected to "
"increase from \"%d\", to \"%d\".\n ",
dwInitialSize,
MAPPINGSIZE);
}
/* Write to the MapView and copy the MapViewOfFile
* to buffer, so we can compare with value read from
* file directly.
*/
memcpy(lpMapViewAddress, buf, strlen(buf));
/* Read from the File handle.
*/
bRetVal = ReadFile(hFile,
readString,
strlen(buf),
&dwBytesRead,
NULL);
if (bRetVal == FALSE)
{
Trace("ERROR: %u :unable to read from file handle "
"hFile=0x%lx\n",
GetLastError(),
hFile);
CloseHandle(hFile);
CloseHandle(hFileMapping);
Fail("");
}
if (memcmp(buf, readString, strlen(readString)) != 0)
{
CloseHandle(hFile);
CloseHandle(hFileMapping);
Fail("ERROR: Read string from file \"%s\", is "
"not equal to string written through MapView "
"\"%s\".\n",
readString,
ch);
}
/* Unmap the view of file.
*/
if(UnmapViewOfFile(lpMapViewAddress) == FALSE)
{
Trace("ERROR: Failed to call UnmapViewOfFile API to"
" unmap the view of a file, error code=%u\n",
GetLastError());
CloseHandle(hFile);
CloseHandle(hFileMapping);
Fail("");
}
/* Close handle to create file.
*/
if(CloseHandle(hFile) == FALSE)
{
Trace("ERROR:%u:Failed to call CloseHandle API "
"to close a file handle.",
GetLastError());
CloseHandle(hFileMapping);
Fail("");
}
if(CloseHandle(hFileMapping) == FALSE)
{
Fail("ERROR:%u:Failed to call CloseHandle API "
"to close a file mapping handle.",
GetLastError());
}
PAL_Terminate();
return PASS;
}
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