// Copyright 2018 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.

package org.chromium.base.task;

/**
 * The default {@link TaskExecutor} which maps directly to base::TaskScheduler.
 */
class DefaultTaskExecutor implements TaskExecutor {
    @Override
    public TaskRunner createTaskRunner(TaskTraits taskTraits) {
        return new TaskRunnerImpl(taskTraits);
    }

    @Override
    public SequencedTaskRunner createSequencedTaskRunner(TaskTraits taskTraits) {
        return new SequencedTaskRunnerImpl(taskTraits);
    }

    /**
     * This maps to a single thread within the native thread pool. Due to that contract we
     * can't run tasks posted on it until native has started.
     */
    @Override
    public SingleThreadTaskRunner createSingleThreadTaskRunner(TaskTraits taskTraits) {
        // Tasks posted via this API will not execute until after native has started.
        return new SingleThreadTaskRunnerImpl(null, taskTraits);
    }

    @Override
    public void postDelayedTask(TaskTraits taskTraits, Runnable task, long delay) {
        createTaskRunner(taskTraits).postDelayedTask(task, delay);
    }
}