/// <summary>
/// Allocates a block of memory at least as large as the amount requested.
/// </summary>
/// <param name="bytes">The number of bytes you want to allocate.</param>
/// <returns>A pointer to a block of memory at least as large as bytes</returns>
/// <remarks>
/// This method uses an alternate method for allocating memory (VirtualAlloc in Windows). The allocation
/// granularity is the page size of the system (usually 4K). Blocks allocated with this method may also
/// be protected using the ProtectBlock method.
/// </remarks>
public static IntPtr AllocateLarge(ulong bytes)
{
IntPtr block = SafeNativeMethods.VirtualAlloc(IntPtr.Zero, new UIntPtr(bytes),
NativeConstants.MEM_COMMIT, NativeConstants.PAGE_READWRITE);
if (block == IntPtr.Zero)
{
throw new OutOfMemoryException("VirtualAlloc returned a null pointer");
}
if (bytes > 0)
{
MemoryPressureManager.AddMemoryPressure((long)bytes);
}
return(block);
}
