Implement Platform::createWaitableEvent() (chromium side)

webkit/child/webkitplatformsupport_child_impl.cc

 // Copyright 2013 The Chromium 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 "webkit/child/webkitplatformsupport_child_impl.h"
 
 #include "base/memory/discardable_memory.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/waitable_event.h"
+#include "third_party/WebKit/public/platform/WebWaitableEvent.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "webkit/child/fling_curve_configuration.h"
 #include "webkit/child/web_discardable_memory_impl.h"
 #include "webkit/child/webthread_impl.h"
 #include "webkit/child/worker_task_runner.h"
 
 #if defined(OS_ANDROID)
 #include "webkit/child/fling_animator_impl_android.h"
 #endif
 
 using blink::WebFallbackThemeEngine;
 using blink::WebThemeEngine;
 
 namespace webkit_glue {
 
+namespace {
+
+class WebWaitableEventImpl : public blink::WebWaitableEvent {
+ public:
+  WebWaitableEventImpl() : impl_(new base::WaitableEvent(false, false)) {}
+  virtual ~WebWaitableEventImpl() {}
+
+  virtual void wait() { impl_->Wait(); }
+  virtual void signal() { impl_->Signal(); }
+
+  base::WaitableEvent* impl() {
+    return impl_.get();
+  }
+
+ private:
+  scoped_ptr<base::WaitableEvent> impl_;
+};

[jochen (gone - plz use gerrit), 2014/01/14 15:29:12]

disallow copy/assign

[kinuko, 2014/01/14 16:51:59]

Done.

+
+}  // namespace
+
 WebKitPlatformSupportChildImpl::WebKitPlatformSupportChildImpl()
     : current_thread_slot_(&DestroyCurrentThread),
       fling_curve_configuration_(new FlingCurveConfiguration) {}
 
 WebKitPlatformSupportChildImpl::~WebKitPlatformSupportChildImpl() {}
 
 WebThemeEngine* WebKitPlatformSupportChildImpl::themeEngine() {
   return &native_theme_engine_;
 }
 
@@ skipping 39 matching lines @@
   scoped_refptr<base::MessageLoopProxy> message_loop =
       base::MessageLoopProxy::current();
   if (!message_loop.get())
     return NULL;
 
   thread = new WebThreadImplForMessageLoop(message_loop.get());
   current_thread_slot_.Set(thread);
   return thread;
 }
 
+blink::WebWaitableEvent* WebKitPlatformSupportChildImpl::createWaitableEvent() {
+  return new WebWaitableEventImpl();
+}
+
+blink::WebWaitableEvent* WebKitPlatformSupportChildImpl::waitMultipleEvents(
+    blink::WebWaitableEvent** web_events,
+    size_t event_count) {

[jochen (gone - plz use gerrit), 2014/01/14 15:29:12]

why not a WebVector?

[kinuko, 2014/01/14 16:51:59]

Ah sure... sounds better. I was biased by base::WaitableEvent::WaitMany()
signature.

Done.

+  base::WaitableEvent** events = new base::WaitableEvent*[event_count];
+  for (size_t i = 0; i < event_count; ++i)
+    events[i] = static_cast<WebWaitableEventImpl*>(web_events[i])->impl();
+  size_t idx = base::WaitableEvent::WaitMany(events, event_count);
+  DCHECK_LT(idx, event_count);
+  return web_events[idx];
+}
+
 void WebKitPlatformSupportChildImpl::didStartWorkerRunLoop(
     const blink::WebWorkerRunLoop& runLoop) {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
 }
 
 void WebKitPlatformSupportChildImpl::didStopWorkerRunLoop(
     const blink::WebWorkerRunLoop& runLoop) {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
 }
 
 blink::WebDiscardableMemory*
 WebKitPlatformSupportChildImpl::allocateAndLockDiscardableMemory(size_t bytes) {
   base::DiscardableMemoryType type =
       base::DiscardableMemory::GetPreferredType();
   if (type == base::DISCARDABLE_MEMORY_TYPE_EMULATED)
     return NULL;
   return WebDiscardableMemoryImpl::CreateLockedMemory(bytes).release();
 }
 
 // static
 void WebKitPlatformSupportChildImpl::DestroyCurrentThread(void* thread) {
   WebThreadImplForMessageLoop* impl =
       static_cast<WebThreadImplForMessageLoop*>(thread);
   delete impl;
 }
 
 }  // namespace webkit_glue