/// <summary>
/// Resizes the memory block previously allocated by Allocate().
/// </summary>
/// <param name="pv">The pointer to the block to resize.</param>
/// <param name="newSize">The new size of the block.</param>
/// <returns>The pointer to the resized block.</returns>
public static IntPtr ReAlloc(IntPtr pv, long newSize)
{
if (hHeap == IntPtr.Zero)
{
InitializeHeap();
}
IntPtr block;
long oldSize = Size(pv);
try
{
UIntPtr bytes = new UIntPtr((ulong)newSize);
block = SafeNativeMethods.HeapReAlloc(hHeap, 0U, pv, bytes);
}
catch (OverflowException ex)
{
throw new OutOfMemoryException(string.Format(CultureInfo.InvariantCulture, "Overflow while trying to allocate {0:N} bytes", newSize), ex);
}
if (block == IntPtr.Zero)
{
throw new OutOfMemoryException(string.Format(CultureInfo.InvariantCulture, "HeapAlloc returned a null pointer while trying to allocate {0:N} bytes", newSize));
}
if (oldSize > 0L)
{
MemoryPressureManager.RemoveMemoryPressure(oldSize);
}
if (newSize > 0)
{
MemoryPressureManager.AddMemoryPressure(newSize);
}
return(block);
}
/// <summary>
/// Resizes the memory block previously allocated by Allocate().
/// </summary>
/// <param name="pv">The pointer to the block to resize.</param>
/// <param name="newSize">The new size of the block.</param>
/// <returns>The pointer to the resized block.</returns>
public static IntPtr ReAlloc(IntPtr pv, int newSize)
{
if (hHeap == IntPtr.Zero)
{
InitializeHeap();
}
IntPtr block;
long oldSize = Size(pv);
try
{
UIntPtr bytes = new UIntPtr((ulong)newSize);
block = SafeNativeMethods.HeapReAlloc(hHeap, 0U, pv, bytes);
}
catch (OverflowException)
{
throw new OutOfMemoryException();
}
if (block == IntPtr.Zero)
{
throw new OutOfMemoryException();
}
if (oldSize > 0L)
{
MemoryPressureManager.RemoveMemoryPressure(oldSize);
}
if (newSize > 0)
{
MemoryPressureManager.AddMemoryPressure(newSize);
}
return(block);
}