// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.mem;

/// A range of bytes within a VMO.
struct Range {
    /// The vmo that contains the bytes.
    handle<vmo> vmo;

    /// The offset of the first byte within the range relative to the start of
    /// the VMO.
    ///
    /// For example, if `offset` is zero, then the first byte in the range is
    /// the first byte in the VMO.
    uint64 offset;

    /// The number of bytes in the range.
    ///
    /// For example, if the offset is 3 and the size is 2, and the VMO starts
    /// with "abcdefg...", then the range contains "de".
    ///
    /// The sum of the offset and the size must not be greater than the
    /// physical size of the VMO.
    uint64 size;
};