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// Copyright 2016 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/sequenced_task_runner.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/threading/thread.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
struct DeleteCounter {
DeleteCounter(int* counter, scoped_refptr<SequencedTaskRunner> task_runner)
: counter_(counter),
task_runner_(std::move(task_runner)) {
}
~DeleteCounter() {
++*counter_;
EXPECT_TRUE(!task_runner_ || task_runner_->RunsTasksOnCurrentThread());
}
int* counter_;
scoped_refptr<SequencedTaskRunner> task_runner_;
};
} // namespace
TEST(SequencedTaskRunnerTest, OnTaskRunnerDeleter) {
base::MessageLoop message_loop;
base::Thread thread("Foreign");
thread.Start();
scoped_refptr<SequencedTaskRunner> current_thread =
message_loop.task_runner();
scoped_refptr<SequencedTaskRunner> foreign_thread =
thread.task_runner();
using SequenceBoundUniquePtr =
std::unique_ptr<DeleteCounter, OnTaskRunnerDeleter>;
int counter = 0;
SequenceBoundUniquePtr ptr(new DeleteCounter(&counter, current_thread),
OnTaskRunnerDeleter(current_thread));
EXPECT_EQ(0, counter);
foreign_thread->PostTask(
FROM_HERE,
Bind([](SequenceBoundUniquePtr) {},
Passed(&ptr)));
{
RunLoop run_loop;
foreign_thread->PostTaskAndReply(
FROM_HERE,
Bind([]{}),
run_loop.QuitClosure());
run_loop.Run();
}
EXPECT_EQ(1, counter);
DeleteCounter* raw = new DeleteCounter(&counter, nullptr);
SequenceBoundUniquePtr ptr2(raw, OnTaskRunnerDeleter(foreign_thread));
EXPECT_EQ(1, counter);
thread.Stop();
ptr2 = nullptr;
ASSERT_EQ(1, counter);
delete raw;
EXPECT_EQ(2, counter);
}
} // namespace base
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