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Added null check to AsyncEvent

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This commit is contained in:
RogueException
2016-10-08 14:47:01 -03:00
parent ba35f5bed1
commit 3576c48680
1 changed files with 3 additions and 0 deletions
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3
src/Discord.Net.Core/Utils/AsyncEvent.cs
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@@ -6,6 +6,7 @@ using System.Threading.Tasks;
namespace Discord namespace Discord
{ {
internal class AsyncEvent<T> internal class AsyncEvent<T>
where T : class
{ {
private readonly object _subLock = new object(); private readonly object _subLock = new object();
internal ImmutableArray<T> _subscriptions; internal ImmutableArray<T> _subscriptions;
@@ -19,11 +20,13 @@ namespace Discord
public void Add(T subscriber) public void Add(T subscriber)
{ {
Preconditions.NotNull(subscriber, nameof(subscriber));
lock (_subLock) lock (_subLock)
_subscriptions = _subscriptions.Add(subscriber); _subscriptions = _subscriptions.Add(subscriber);
} }
public void Remove(T subscriber) public void Remove(T subscriber)
{ {
Preconditions.NotNull(subscriber, nameof(subscriber));
lock (_subLock) lock (_subLock)
_subscriptions = _subscriptions.Remove(subscriber); _subscriptions = _subscriptions.Remove(subscriber);
} }