From 32e8155127126c187ce32f7368742057bcaf69da Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Fri, 17 Apr 2020 05:47:12 -0400
Subject: Bug 1372829 - Part 2: mozilla::EditorBase should cache raw pointer of
 nsISelectionController and nsIDocument with nsWeakPtr

Tag #1375
---
 xpcom/base/nsIWeakReference.idl | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'xpcom/base')

diff --git a/xpcom/base/nsIWeakReference.idl b/xpcom/base/nsIWeakReference.idl
index 73390b15f..7f6880fad 100644
--- a/xpcom/base/nsIWeakReference.idl
+++ b/xpcom/base/nsIWeakReference.idl
@@ -37,6 +37,11 @@ interface nsIWeakReference : nsISupports
 
 %{C++
     virtual size_t SizeOfOnlyThis(mozilla::MallocSizeOf aMallocSizeOf) const = 0;
+
+    /**
+     * Returns true if the referring object is alive.  Otherwise, false.
+     */
+    virtual bool IsAlive() const = 0;
 %}
   };
 
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