base/fuchsia/service_directory_client.cc

   1 // Copyright 2018 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 #include "base/fuchsia/service_directory_client.h"
   6
   7 #include <lib/fdio/directory.h>
   8 #include <utility>
   9
  10 #include "base/fuchsia/file_utils.h"
  11 #include "base/fuchsia/fuchsia_logging.h"
  12 #include "base/logging.h"
  13 #include "base/memory/ptr_util.h"
  14 #include "base/no_destructor.h"
  15
  16 namespace base {
  17 namespace fuchsia {
  18
  19 ServiceDirectoryClient::ServiceDirectoryClient(
  20     fidl::InterfaceHandle<::fuchsia::io::Directory> directory)
  21     : directory_(std::move(directory)) {
  22   DCHECK(directory_);
  23 }
  24
  25 ServiceDirectoryClient::~ServiceDirectoryClient() = default;
  26
  27 // static
  28 const ServiceDirectoryClient* ServiceDirectoryClient::ForCurrentProcess() {
  29   return ServiceDirectoryClient::ProcessInstance()->get();
  30 }
  31
  32 zx_status_t ServiceDirectoryClient::ConnectToServiceUnsafe(
  33     const char* name,
  34     zx::channel request) const {
  35   DCHECK(request.is_valid());
  36   return fdio_service_connect_at(directory_.channel().get(), name,
  37                                  request.release());
  38 }
  39
  40 ServiceDirectoryClient::ServiceDirectoryClient() {}
  41
  42 // static
  43 std::unique_ptr<ServiceDirectoryClient>
  44 ServiceDirectoryClient::CreateForProcess() {
  45   fidl::InterfaceHandle<::fuchsia::io::Directory> directory =
  46       OpenDirectory(base::FilePath(kServiceDirectoryPath));
  47   if (directory)
  48     return std::make_unique<ServiceDirectoryClient>(std::move(directory));
  49   LOG(WARNING) << "/svc is not available.";
  50   return base::WrapUnique(new ServiceDirectoryClient);
  51 }
  52
  53 // static
  54 std::unique_ptr<ServiceDirectoryClient>*
  55 ServiceDirectoryClient::ProcessInstance() {
  56   static base::NoDestructor<std::unique_ptr<ServiceDirectoryClient>>
  57       service_directory_client_ptr(CreateForProcess());
  58   return service_directory_client_ptr.get();
  59 }
  60
  61 ScopedServiceDirectoryClientForCurrentProcessForTest::
  62     ScopedServiceDirectoryClientForCurrentProcessForTest(
  63         fidl::InterfaceHandle<::fuchsia::io::Directory> directory)
  64     : old_client_(std::move(*ServiceDirectoryClient::ProcessInstance())) {
  65   *ServiceDirectoryClient::ProcessInstance() =
  66       std::make_unique<ServiceDirectoryClient>(std::move(directory));
  67   client_ = ServiceDirectoryClient::ProcessInstance()->get();
  68 }
  69
  70 ScopedServiceDirectoryClientForCurrentProcessForTest::
  71     ~ScopedServiceDirectoryClientForCurrentProcessForTest() {
  72   DCHECK_EQ(ServiceDirectoryClient::ProcessInstance()->get(), client_);
  73   *ServiceDirectoryClient::ProcessInstance() = std::move(old_client_);
  74 }
  75
  76 }  // namespace fuchsia
  77 }  // namespace base