natives.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "natives.h"
 
#include <zircon/syscalls.h>
 
#include <cstring>
#include <memory>
#include <vector>
 
#include "handle.h"
#include "handle_disposition.h"
#include "handle_waiter.h"
#include "system.h"
#include "third_party/dart/runtime/include/dart_api.h"
#include "third_party/tonic/dart_binding_macros.h"
#include "third_party/tonic/dart_class_library.h"
#include "third_party/tonic/dart_class_provider.h"
#include "third_party/tonic/dart_library_natives.h"
#include "third_party/tonic/dart_state.h"
#include "third_party/tonic/logging/dart_invoke.h"
#include "third_party/tonic/typed_data/typed_list.h"
 
using tonic::ToDart;
 
namespace zircon {
namespace dart {
namespace {
 
static tonic::DartLibraryNatives* g_natives;
 
tonic::DartLibraryNatives* InitNatives() {
  tonic::DartLibraryNatives* natives = new tonic::DartLibraryNatives();
  HandleDisposition::RegisterNatives(natives);
  HandleWaiter::RegisterNatives(natives);
  Handle::RegisterNatives(natives);
  System::RegisterNatives(natives);
 
  return natives;
}
 
Dart_NativeFunction NativeLookup(Dart_Handle name,
                                 int argument_count,
                                 bool* auto_setup_scope) {
  const char* function_name = nullptr;
  Dart_Handle result = Dart_StringToCString(name, &function_name);
  if (Dart_IsError(result)) {
    Dart_PropagateError(result);
  }
  FML_DCHECK(function_name != nullptr);
  FML_DCHECK(auto_setup_scope != nullptr);
  *auto_setup_scope = true;
  if (!g_natives)
    g_natives = InitNatives();
  return g_natives->GetNativeFunction(name, argument_count, auto_setup_scope);
}
 
const uint8_t* NativeSymbol(Dart_NativeFunction native_function) {
  if (!g_natives)
    g_natives = InitNatives();
  return g_natives->GetSymbol(native_function);
}
 
}  // namespace
 
void Initialize() {
  Dart_Handle library = Dart_LookupLibrary(ToDart("dart:zircon"));
  FML_CHECK(!tonic::CheckAndHandleError(library));
  Dart_Handle result = Dart_SetNativeResolver(
      library, zircon::dart::NativeLookup, zircon::dart::NativeSymbol);
  FML_CHECK(!tonic::CheckAndHandleError(result));
 
  auto dart_state = tonic::DartState::Current();
  std::unique_ptr<tonic::DartClassProvider> zircon_class_provider(
      new tonic::DartClassProvider(dart_state, "dart:zircon"));
  dart_state->class_library().add_provider("zircon",
                                           std::move(zircon_class_provider));
}
 
}  // namespace dart
}  // namespace zircon