base/fuchsia/service_provider_impl.h

   1 // Copyright 2019 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_FUCHSIA_SERVICE_PROVIDER_IMPL_H_
   6 #define BASE_FUCHSIA_SERVICE_PROVIDER_IMPL_H_
   7
   8 #include <fuchsia/io/cpp/fidl.h>
   9 #include <fuchsia/sys/cpp/fidl.h>
  10 #include <lib/fidl/cpp/binding_set.h>
  11 #include <lib/fidl/cpp/interface_handle.h>
  12 #include <lib/zx/channel.h>
  13 #include <string>
  14
  15 #include "base/base_export.h"
  16 #include "base/callback.h"
  17 #include "base/fuchsia/service_directory_client.h"
  18 #include "base/macros.h"
  19
  20 namespace base {
  21 namespace fuchsia {
  22
  23 // Implementation of the legacy sys.ServiceProvider interface which delegates
  24 // requests to an underlying fuchsia.io.Directory of services.
  25 // TODO(https://crbug.com/920920): Remove this when ServiceProvider is gone.
  26 class BASE_EXPORT ServiceProviderImpl : public ::fuchsia::sys::ServiceProvider {
  27  public:
  28   explicit ServiceProviderImpl(
  29       fidl::InterfaceHandle<::fuchsia::io::Directory> service_directory);
  30   ~ServiceProviderImpl() override;
  31
  32   // Binds a |request| from a new client to be serviced by this ServiceProvider.
  33   void AddBinding(
  34       fidl::InterfaceRequest<::fuchsia::sys::ServiceProvider> request);
  35
  36   // Sets a Closure to be invoked when the last client disconnects.
  37   void SetOnLastClientDisconnectedClosure(
  38       base::OnceClosure on_last_client_disconnected);
  39
  40   // Returns true if one or more clients are connected.
  41   bool has_clients() const { return bindings_.size() != 0; }
  42
  43  private:
  44   // fuchsia::sys::ServiceProvider implementation.
  45   void ConnectToService(std::string service_name,
  46                         zx::channel client_handle) override;
  47
  48   void OnBindingSetEmpty();
  49
  50   const ServiceDirectoryClient directory_;
  51   fidl::BindingSet<::fuchsia::sys::ServiceProvider> bindings_;
  52   base::OnceClosure on_last_client_disconnected_;
  53
  54   DISALLOW_COPY_AND_ASSIGN(ServiceProviderImpl);
  55 };
  56
  57 }  // namespace fuchsia
  58 }  // namespace base
  59
  60 #endif  // BASE_FUCHSIA_SERVICE_PROVIDER_IMPL_H_