/// <summary>
/// Allocates a block of memory with the PAGE_EXECUTE permission.
/// </summary>
/// <param name="size">The size of the memory to allocate.</param>
/// <returns>A pointer to the allocated block of memory.</returns>
public static IntPtr AllocateExecutable(long size)
{
IntPtr block = SafeNativeMethods.VirtualAlloc(IntPtr.Zero, new UIntPtr((ulong)size), NativeConstants.MEM_COMMIT, NativeConstants.PAGE_EXECUTE_READWRITE);
if (block == IntPtr.Zero)
{
throw new OutOfMemoryException("VirtualAlloc returned a null pointer");
}
if (size > 0L)
{
MemoryPressureManager.AddMemoryPressure(size);
}
return(block);
}
/// <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>
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);
}