/// <summary>
/// Initializes a new instance of <see cref="CefBaseRefCounted{T}"/>.
/// </summary>
public unsafe CefBaseRefCounted()
: base(Allocate(sizeof(T)))
{
var reference = new RefCountedReference(new WeakReference <CefBaseRefCounted>(this));
GlobalSyncRoot.EnterWriteLock();
try
{
RefCounted.Add(_instance, reference);
}
finally
{
GlobalSyncRoot.ExitWriteLock();
}
}
/// <summary>
/// Returns a wrapper for the specified pointer.
/// </summary>
/// <typeparam name="TClass">The type of wrapper.</typeparam>
/// <param name="create">Represents a method that create a new wrapper.</param>
/// <param name="instance">The pointer to ref-counted CEF struct.</param>
/// <returns>Returns an existing or new wrapper for the specified pointer.</returns>
public unsafe static TClass Wrap <TClass>(Func <IntPtr, TClass> create, T *instance)
where TClass : CefBaseRefCounted <T>
{
if (instance == null)
{
return(null);
}
RefCountedWrapperStruct *ws = null;
CefBaseRefCounted wrapper;
IntPtr key = new IntPtr(instance);
Internal.CefBaseRefCountedImpl.GlobalSyncRoot.EnterUpgradeableReadLock();
try
{
if (CefApi.UseUnsafeImplementation)
{
ws = GetWrapperStructPtr(instance);
if (ws != null && UnsafeRefCounted.TryGetValue(ws->cppObject, out WeakReference <CefBaseRefCounted> weakRef) &&
weakRef.TryGetTarget(out wrapper))
{
((cef_base_ref_counted_t *)instance)->Release();
return((TClass)wrapper);
}
}
if (RefCounted.TryGetValue(key, out RefCountedReference reference) &&
reference.Instance.TryGetTarget(out wrapper))
{
((cef_base_ref_counted_t *)instance)->Release();
return((TClass)wrapper);
}
#if DEBUG
else if (CefStructure.IsAllocated(key))
{
throw new InvalidCefObjectException(string.Format("Unexpected access to {0}.", typeof(TClass).Name));
}
#endif
else
{
Internal.CefBaseRefCountedImpl.GlobalSyncRoot.EnterWriteLock();
try
{
TClass typedWrapper = create(key);
var weakRef = new WeakReference <CefBaseRefCounted>(typedWrapper);
RefCounted[key] = new RefCountedReference(weakRef);
if (ws != null)
{
UnsafeRefCounted[ws->cppObject] = weakRef;
}
return(typedWrapper);
}
finally
{
Internal.CefBaseRefCountedImpl.GlobalSyncRoot.ExitWriteLock();
}
}
}
finally
{
Internal.CefBaseRefCountedImpl.GlobalSyncRoot.ExitUpgradeableReadLock();
}
}