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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: test3.c
**
** Purpose: Allocate some memory. Then reallocate that memory into a
** bigger space on the heap. Check that the first portion of the data is
** unchanged. Then set the new portion to a value, to ensure that it is
** properly writable memory.
**
**
**============================================================*/
#include <palsuite.h>
int __cdecl main(int argc, char *argv[])
{
HANDLE TheHeap;
char* TheMemory;
char* ReAllocMemory;
int i;
if(PAL_Initialize(argc, argv) != 0)
{
return FAIL;
}
TheHeap = GetProcessHeap();
if(TheHeap == NULL)
{
Fail("ERROR: GetProcessHeap() returned NULL when it was called. "
"GetLastError() returned %d.",GetLastError());
}
/* Allocate 100 bytes on the heap */
if((TheMemory = HeapAlloc(TheHeap, 0, 100)) == NULL)
{
Fail("ERROR: HeapAlloc returned NULL when it was called. "
"GetLastError() returned %d.",GetLastError());
}
/* Set the first 100 bytes to 'X' */
memset(TheMemory, 'X', 100);
/* Reallocate the memory to 200 bytes */
ReAllocMemory = HeapReAlloc(TheHeap, 0, TheMemory, 200);
if(ReAllocMemory == NULL)
{
Fail("ERROR: HeapReAlloc failed to reallocate the 100 bytes of "
"heap memory. GetLastError returns %d.",GetLastError());
}
/* Check that each of the first 100 bytes hasn't lost any data. */
for(i=0; i<100; ++i)
{
if(ReAllocMemory[i] != 'X')
{
Fail("ERROR: Byte number %d of the reallocated memory block "
"is not set to 'X' as it should be.",i);
}
}
/* Beyond the first 100 bytes is valid free memory. We'll set all this
memory to a value -- though, even if HeapReAlloc didn't work, it might
still be possible to memset this memory without raising an exception.
*/
memset(ReAllocMemory+100, 'Z', 100);
PAL_Terminate();
return PASS;
}
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