Free worker context resources on idle.

cc/test/test_context_support.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 "cc/test/test_context_support.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 
 namespace cc {
 namespace {
 
 // Class that DCHECKs if it is destructed without first having Release called.
-class ScopedVisibilityImpl : public gpu::ContextSupport::ScopedVisibility {
+template <typename T>
+class ScopedContextSupportToken : public T {
  public:
-  explicit ScopedVisibilityImpl(gpu::ContextSupport* context_support)
+  explicit ScopedContextSupportToken(gpu::ContextSupport* context_support)
       : initial_context_support_(context_support) {}
-  ~ScopedVisibilityImpl() { DCHECK(!initial_context_support_); }
+
+  ~ScopedContextSupportToken() { DCHECK(!initial_context_support_); }
 
   void Release(gpu::ContextSupport* context_support) {
     DCHECK_EQ(initial_context_support_, context_support);
     initial_context_support_ = nullptr;
   }
 
  private:
   const gpu::ContextSupport* initial_context_support_;
 };
 
+using ScopedVisibilityImpl =
+    ScopedContextSupportToken<gpu::ContextSupport::ScopedVisibility>;
+using ScopedBusyImpl =
+    ScopedContextSupportToken<gpu::ContextSupport::ScopedBusy>;
+
 }  // namespace
 
 TestContextSupport::TestContextSupport() : weak_ptr_factory_(this) {}
 
 TestContextSupport::~TestContextSupport() {}
 
 void TestContextSupport::SignalSyncToken(const gpu::SyncToken& sync_token,
                                          const base::Closure& callback) {
   sync_point_callbacks_.push_back(callback);
   base::ThreadTaskRunnerHandle::Get()->PostTask(
@@ skipping 74 matching lines @@
   DCHECK(visibility);
   DCHECK_GT(num_visible_clients_, 0u);
   --num_visible_clients_;
   static_cast<ScopedVisibilityImpl*>(visibility.get())->Release(this);
 }
 
 bool TestContextSupport::AnyClientsVisible() const {
   return num_visible_clients_ > 0;
 }
 
+std::unique_ptr<gpu::ContextSupport::ScopedBusy>
+TestContextSupport::ClientBecameBusy() {
+  return base::MakeUnique<ScopedBusyImpl>(this);
+}
+
+void TestContextSupport::ClientBecameNotBusy(std::unique_ptr<ScopedBusy> busy) {
+  static_cast<ScopedBusyImpl*>(busy.get())->Release(this);
+}
+
+void TestContextSupport::SetIdleCallback(const base::Closure& callback) {}
+
 }  // namespace cc