zircon/system/utest/fidl-llcpp-interop/dirent.fidl

// 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 fidl.test.llcpp.dirent;

const uint32 TEST_MAX_PATH = 10;

/// Fake dirent structure to exercise linearization codepaths.
struct DirEnt {
    bool is_dir;
    string:TEST_MAX_PATH name;
    int32 some_flags;
};

const uint32 SMALL_DIR_VECTOR_SIZE = 3;

/// Test interface implemented by LLCPP, with a manually written server,
/// since types with more than one level of indirections are not handled by the C binding.
protocol DirEntTestInterface {
    /// Iterate over the dirents and return the number of directories within them.
    CountNumDirectories(vector<DirEnt>:1000 dirents) -> (int64 num_dir);

    /// Return a vector of dirents. Empty request. Response may stack-allocate.
    ReadDir() -> (vector<DirEnt>:SMALL_DIR_VECTOR_SIZE dirents);

    /// Consume dirents. Empty response. Request may stack-allocate.
    ConsumeDirectories(vector<DirEnt>:SMALL_DIR_VECTOR_SIZE dirents) -> ();

    /// Event
    -> OnDirents(vector<DirEnt>:1000 dirents);

    /// Binding will not wait for response.
    /// But here we send an eventpair which the server will signal upon receipt of message.
    OneWayDirents(vector<DirEnt>:1000 dirents, handle<eventpair> ep);
};