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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: Positivve test the MapViewOfFile API.
** Mapping a pagefile allocation into memory
**
** Depends: CreateFileMappingW,
** UnmapViewOfFile
** CloseHandle.
**
**
**============================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char *argv[])
{
const int MAPPINGSIZE = 2048;
HANDLE hFileMapping;
LPVOID lpMapViewAddress;
char *p;
int i;
/* Initialize the PAL environment.
*/
if(0 != PAL_Initialize(argc, argv))
{
return FAIL;
}
hFileMapping = CreateFileMappingW(INVALID_HANDLE_VALUE,
NULL,
PAGE_READWRITE,
0,
MAPPINGSIZE,
NULL);
if (hFileMapping == NULL) {
Trace("ERROR:%u: CreateFileMappingW() failed\n", GetLastError());
Fail("");
}
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: MapViewOfFile() failed.\n",
GetLastError());
CloseHandle(hFileMapping);
Fail("");
}
p = (char *)lpMapViewAddress;
for (i=0; i<MAPPINGSIZE; ++i) {
/* Confirm that the memory is zero-initialized */
if (p[i] != 0)
{
Fail("MapViewOfFile() of pagefile didn't return 0-filled data "
"(Offset %d has value 0x%x)\n", i, p[i]);
}
/* Confirm that it is writable */
*(char *)lpMapViewAddress = 0xcc;
}
/* Clean-up and Terminate the PAL.
*/
CloseHandle(hFileMapping);
UnmapViewOfFile(lpMapViewAddress);
PAL_Terminate();
return PASS;
}
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