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using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using UnityEngine;
using System.Diagnostics;
namespace Unity.Services.Lobbies.Scheduler
{
/// <summary>
/// <para>Provides the means to schedule tasks on a background thread or the
/// main thread. Also allows for creation of co-routines from classes that do
/// not inherit from MonoBehaviour.</para>
///
/// <para>This is thread safe, through it must be constructed on the main thread.
/// </para>
/// </summary>
public abstract class TaskScheduler : MonoBehaviour
{
/// <summary>
/// Schedules a new task on a background thread.
/// </summary>
///
/// <param name="task">The task that should be executed on a background thread.</param>
public abstract void ScheduleBackgroundTask(Action task);
/// <summary>
/// Determines whether the current thread is the main thread.
/// </summary>
///
/// <returns>Whether or not this thread is the main thread.</returns>
public abstract bool IsMainThread();
/// <summary>
/// Schedules a new task on the main thread. The task will be executed during the
/// next update.
/// </summary>
///
/// <param name="task">The task that should be executed on the main thread.</param>
public abstract void ScheduleMainThreadTask(Action task);
/// <summary>
/// Executes immediately if on main thread else queue on main thread for next update.
/// </summary>
///
/// <param name="action">The task that should be executed on the main thread.</param>
public void ScheduleOrExecuteOnMain(Action action)
{
if (IsMainThread())
{
action?.Invoke();
}
else
{
ScheduleMainThreadTask(action);
}
}
}
}