using System;
using System.Threading;

namespace TeamAAS_VP.Core.Cameras
{
    /// <summary>
    /// Base class for camera implementations. Provides per-instance locking and state lock
    /// to serialize operations on the same camera instance and protect state changes (e.g., IsGrabbing).
    /// </summary>
    public abstract class CameraBase
    {
        // Semaphore to serialize operations on the same instance
        protected readonly SemaphoreSlim _operationSemaphore = new SemaphoreSlim(1, 1);
        // Lock for protecting state properties like IsGrabbing
        protected readonly object _stateLock = new object();

        protected void EnterOperation()
        {
            _operationSemaphore.Wait();
        }

        protected void ExitOperation()
        {
            try
            {
                _operationSemaphore.Release();
            }
            catch (SemaphoreFullException)
            {
                // ignore if already released
            }
        }
    }
}