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| 1 // Copyright 2014 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 "third_party/mojo/src/mojo/edk/js/waiting_callback.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/message_loop/message_loop.h" | |
| 9 #include "gin/per_context_data.h" | |
| 10 #include "mojo/public/cpp/environment/environment.h" | |
| 11 | |
| 12 namespace mojo { | |
| 13 namespace js { | |
| 14 | |
| 15 namespace { | |
| 16 | |
| 17 v8::Handle<v8::Private> GetHiddenPropertyName(v8::Isolate* isolate) { | |
| 18 return v8::Private::ForApi( | |
| 19 isolate, gin::StringToV8(isolate, "::mojo::js::WaitingCallback")); | |
| 20 } | |
| 21 | |
| 22 } // namespace | |
| 23 | |
| 24 gin::WrapperInfo WaitingCallback::kWrapperInfo = { gin::kEmbedderNativeGin }; | |
| 25 | |
| 26 // static | |
| 27 gin::Handle<WaitingCallback> WaitingCallback::Create( | |
| 28 v8::Isolate* isolate, | |
| 29 v8::Handle<v8::Function> callback, | |
| 30 gin::Handle<HandleWrapper> handle_wrapper, | |
| 31 MojoHandleSignals signals) { | |
| 32 gin::Handle<WaitingCallback> waiting_callback = gin::CreateHandle( | |
| 33 isolate, new WaitingCallback(isolate, callback, handle_wrapper)); | |
| 34 waiting_callback->wait_id_ = Environment::GetDefaultAsyncWaiter()->AsyncWait( | |
| 35 handle_wrapper->get().value(), | |
| 36 signals, | |
| 37 MOJO_DEADLINE_INDEFINITE, | |
| 38 &WaitingCallback::CallOnHandleReady, | |
| 39 waiting_callback.get()); | |
| 40 return waiting_callback; | |
| 41 } | |
| 42 | |
| 43 void WaitingCallback::Cancel() { | |
| 44 if (!wait_id_) | |
| 45 return; | |
| 46 | |
| 47 handle_wrapper_->RemoveCloseObserver(this); | |
| 48 handle_wrapper_ = NULL; | |
| 49 Environment::GetDefaultAsyncWaiter()->CancelWait(wait_id_); | |
| 50 wait_id_ = 0; | |
| 51 } | |
| 52 | |
| 53 WaitingCallback::WaitingCallback(v8::Isolate* isolate, | |
| 54 v8::Handle<v8::Function> callback, | |
| 55 gin::Handle<HandleWrapper> handle_wrapper) | |
| 56 : wait_id_(0), handle_wrapper_(handle_wrapper.get()), weak_factory_(this) { | |
| 57 handle_wrapper_->AddCloseObserver(this); | |
| 58 v8::Handle<v8::Context> context = isolate->GetCurrentContext(); | |
| 59 runner_ = gin::PerContextData::From(context)->runner()->GetWeakPtr(); | |
| 60 GetWrapper(isolate) | |
| 61 ->SetPrivate(context, GetHiddenPropertyName(isolate), callback) | |
| 62 .FromJust(); | |
| 63 } | |
| 64 | |
| 65 WaitingCallback::~WaitingCallback() { | |
| 66 Cancel(); | |
| 67 } | |
| 68 | |
| 69 // static | |
| 70 void WaitingCallback::CallOnHandleReady(void* closure, MojoResult result) { | |
| 71 static_cast<WaitingCallback*>(closure)->OnHandleReady(result); | |
| 72 } | |
| 73 | |
| 74 void WaitingCallback::ClearWaitId() { | |
| 75 wait_id_ = 0; | |
| 76 handle_wrapper_->RemoveCloseObserver(this); | |
| 77 handle_wrapper_ = nullptr; | |
| 78 } | |
| 79 | |
| 80 void WaitingCallback::OnHandleReady(MojoResult result) { | |
| 81 ClearWaitId(); | |
| 82 CallCallback(result); | |
| 83 } | |
| 84 | |
| 85 void WaitingCallback::CallCallback(MojoResult result) { | |
| 86 // ClearWaitId must already have been called. | |
| 87 DCHECK(!wait_id_); | |
| 88 DCHECK(!handle_wrapper_); | |
| 89 | |
| 90 if (!runner_) | |
| 91 return; | |
| 92 | |
| 93 gin::Runner::Scope scope(runner_.get()); | |
| 94 v8::Isolate* isolate = runner_->GetContextHolder()->isolate(); | |
| 95 | |
| 96 v8::Handle<v8::Value> hidden_value = | |
| 97 GetWrapper(isolate) | |
| 98 ->GetPrivate(runner_->GetContextHolder()->context(), | |
| 99 GetHiddenPropertyName(isolate)) | |
| 100 .ToLocalChecked(); | |
| 101 v8::Handle<v8::Function> callback; | |
| 102 CHECK(gin::ConvertFromV8(isolate, hidden_value, &callback)); | |
| 103 | |
| 104 v8::Handle<v8::Value> args[] = { gin::ConvertToV8(isolate, result) }; | |
| 105 runner_->Call(callback, runner_->global(), 1, args); | |
| 106 } | |
| 107 | |
| 108 void WaitingCallback::OnWillCloseHandle() { | |
| 109 Environment::GetDefaultAsyncWaiter()->CancelWait(wait_id_); | |
| 110 | |
| 111 // This may be called from GC, so we can't execute Javascript now, call | |
| 112 // ClearWaitId explicitly, and CallCallback asynchronously. | |
| 113 ClearWaitId(); | |
| 114 base::MessageLoop::current()->PostTask( | |
| 115 FROM_HERE, | |
| 116 base::Bind(&WaitingCallback::CallCallback, weak_factory_.GetWeakPtr(), | |
| 117 MOJO_RESULT_INVALID_ARGUMENT)); | |
| 118 } | |
| 119 | |
| 120 } // namespace js | |
| 121 } // namespace mojo | |
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Chromium Code Reviews
Issue 1676913002:
[mojo] Delete third_party/mojo (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master