src/lib/fidl/c/llcpp_interop_tests/dirent.test.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;

using zx;

const TEST_MAX_PATH uint32 = 10;

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

const SMALL_DIR_VECTOR_SIZE uint32 = 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(struct {
        dirents vector<DirEnt>:1000;
    }) -> (struct {
        num_dir int64;
    });

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

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

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

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