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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/extension_file_task_runner.h"
#include "base/task/lazy_thread_pool_task_runner.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
namespace extensions {
namespace {
// Note: All tasks posted to a single task runner have the same priority. This
// is unfortunate, since some file-related tasks are high priority (like serving
// a file from the extension protocols or loading an extension in response to a
// user action), and others are low priority (like garbage collection). Split
// the difference and use USER_VISIBLE, which is the default priority and what a
// task posted to a named thread (like the FILE thread) would receive.
base::LazyThreadPoolSequencedTaskRunner g_task_runner =
LAZY_THREAD_POOL_SEQUENCED_TASK_RUNNER_INITIALIZER(
base::TaskTraits(base::MayBlock(),
base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
base::TaskPriority::USER_VISIBLE));
} // namespace
scoped_refptr<base::SequencedTaskRunner> GetExtensionFileTaskRunner() {
return g_task_runner.Get();
}
scoped_refptr<base::SequencedTaskRunner> GetOneShotFileTaskRunner(
base::TaskPriority priority) {
return base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
priority});
}
} // namespace extensions
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