| // Copyright 2021 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. |
| |
| #ifndef LIB_DRIVER2_DEVFS_EXPORTER_H_ |
| #define LIB_DRIVER2_DEVFS_EXPORTER_H_ |
| |
| #include <fidl/fuchsia.device.fs/cpp/wire.h> |
| #include <lib/driver2/namespace.h> |
| #include <lib/fpromise/promise.h> |
| |
| namespace driver { |
| |
| // Allows a driver to export a service to devfs. |
| class DevfsExporter { |
| public: |
| // Creates a devfs exporter, where `ns` will be used to connect to |
| // fuchsia.device.fs.Exporter, and `svc_dir` will be used to find the services |
| // to export. |
| static zx::status<DevfsExporter> Create(const Namespace& ns, async_dispatcher_t* dispatcher, |
| fidl::WireSharedClient<fuchsia_io::Directory> svc_dir); |
| |
| DevfsExporter() = default; |
| |
| // Exports `service_path` to `devfs_path`, with an optionally associated |
| // `protocol_id`. |
| fpromise::promise<void, zx_status_t> Export(std::string_view service_path, |
| std::string_view devfs_path, |
| uint32_t protocol_id = 0) const; |
| |
| // Exports `T` to `devfs_path`, with an optionally associated `protocol_id`. |
| template <typename T> |
| fpromise::promise<void, zx_status_t> Export(std::string_view devfs_path, |
| uint32_t protocol_id = 0) const { |
| return Export(fidl::DiscoverableProtocolName<T>, devfs_path, protocol_id); |
| } |
| |
| private: |
| DevfsExporter(async_dispatcher_t* dispatcher, |
| fidl::WireSharedClient<fuchsia_device_fs::Exporter> exporter, |
| fidl::WireSharedClient<fuchsia_io::Directory> svc_dir); |
| |
| fpromise::promise<void, zx_status_t> ExportImpl(std::string_view service_path, |
| std::string_view devfs_path, |
| uint32_t protocol_id = 0) const; |
| |
| async_dispatcher_t* dispatcher_; |
| fidl::WireSharedClient<fuchsia_device_fs::Exporter> exporter_; |
| fidl::WireSharedClient<fuchsia_io::Directory> svc_dir_; |
| }; |
| |
| } // namespace driver |
| |
| #endif // LIB_DRIVER2_DEVFS_EXPORTER_H_ |