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// 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 "base/bind.h"
#include "base/location.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/thread.h"
#include "cc/layers/delegated_frame_resource_collection.h"
#include "cc/resources/returned_resource.h"
#include "cc/resources/transferable_resource.h"
#include "cc/trees/blocking_task_runner.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cc {
namespace {
class DelegatedFrameResourceCollectionTest
: public testing::Test,
public DelegatedFrameResourceCollectionClient {
protected:
DelegatedFrameResourceCollectionTest() : resources_available_(false) {}
void SetUp() override { CreateResourceCollection(); }
void TearDown() override { DestroyResourceCollection(); }
void CreateResourceCollection() {
DCHECK(!resource_collection_.get());
resource_collection_ = new DelegatedFrameResourceCollection;
resource_collection_->SetClient(this);
}
void DestroyResourceCollection() {
if (resource_collection_.get()) {
resource_collection_->SetClient(nullptr);
resource_collection_ = nullptr;
}
}
TransferableResourceArray CreateResourceArray() {
TransferableResourceArray resources;
TransferableResource resource;
resource.id = 444;
resources.push_back(resource);
return resources;
}
void UnusedResourcesAreAvailable() override {
resources_available_ = true;
resource_collection_->TakeUnusedResourcesForChildCompositor(
&returned_resources_);
if (!resources_available_closure_.is_null())
resources_available_closure_.Run();
}
bool ReturnAndResetResourcesAvailable() {
bool r = resources_available_;
resources_available_ = false;
return r;
}
scoped_refptr<DelegatedFrameResourceCollection> resource_collection_;
bool resources_available_;
ReturnedResourceArray returned_resources_;
base::Closure resources_available_closure_;
};
// This checks that taking the return callback doesn't take extra refcounts,
// since it's sent to other threads.
TEST_F(DelegatedFrameResourceCollectionTest, NoRef) {
// Start with one ref.
EXPECT_TRUE(resource_collection_->HasOneRef());
ReturnCallback return_callback =
resource_collection_->GetReturnResourcesCallbackForImplThread();
// Callback shouldn't take a ref since it's sent to other threads.
EXPECT_TRUE(resource_collection_->HasOneRef());
}
void ReturnResourcesOnThread(ReturnCallback callback,
const ReturnedResourceArray& resources,
base::WaitableEvent* event,
BlockingTaskRunner* main_thread_task_runner) {
callback.Run(resources, main_thread_task_runner);
if (event)
event->Wait();
}
// Tests that the ReturnCallback can run safely on threads even after the
// last references to the collection were dropped.
// Flaky: crbug.com/313441
TEST_F(DelegatedFrameResourceCollectionTest, Thread) {
base::Thread thread("test thread");
thread.Start();
scoped_ptr<BlockingTaskRunner> main_thread_task_runner(
BlockingTaskRunner::Create(base::ThreadTaskRunnerHandle::Get()));
TransferableResourceArray resources = CreateResourceArray();
resource_collection_->ReceivedResources(resources);
resource_collection_->RefResources(resources);
ReturnedResourceArray returned_resources;
TransferableResource::ReturnResources(resources, &returned_resources);
base::WaitableEvent event(false, false);
{
base::RunLoop run_loop;
resources_available_closure_ = run_loop.QuitClosure();
thread.message_loop()->task_runner()->PostTask(
FROM_HERE,
base::Bind(
&ReturnResourcesOnThread,
resource_collection_->GetReturnResourcesCallbackForImplThread(),
returned_resources, &event, main_thread_task_runner.get()));
run_loop.Run();
}
EXPECT_TRUE(ReturnAndResetResourcesAvailable());
EXPECT_EQ(1u, returned_resources_.size());
EXPECT_EQ(444u, returned_resources_[0].id);
EXPECT_EQ(1, returned_resources_[0].count);
returned_resources_.clear();
// The event prevents the return resources callback from being deleted.
// Destroy the last reference from this thread to the collection before
// signaling the event, to ensure any reference taken by the callback, if any,
// would be the last one.
DestroyResourceCollection();
event.Signal();
CreateResourceCollection();
resource_collection_->ReceivedResources(resources);
resource_collection_->RefResources(resources);
// Destroy the collection before we have a chance to run the return callback.
ReturnCallback return_callback =
resource_collection_->GetReturnResourcesCallbackForImplThread();
resource_collection_->LoseAllResources();
DestroyResourceCollection();
EXPECT_TRUE(ReturnAndResetResourcesAvailable());
EXPECT_EQ(1u, returned_resources_.size());
EXPECT_EQ(444u, returned_resources_[0].id);
EXPECT_EQ(1, returned_resources_[0].count);
EXPECT_TRUE(returned_resources_[0].lost);
returned_resources_.clear();
base::WaitableEvent* null_event = nullptr;
thread.message_loop()->task_runner()->PostTask(
FROM_HERE,
base::Bind(&ReturnResourcesOnThread, return_callback, returned_resources,
null_event, main_thread_task_runner.get()));
thread.Stop();
}
} // namespace
} // namespace cc
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