diff options
Diffstat (limited to 'xpcom')
| -rw-r--r-- | xpcom/base/nsIWeakReference.idl | 5 | ||||
| -rw-r--r-- | xpcom/glue/nsWeakReference.cpp | 1 |
2 files changed, 6 insertions, 0 deletions
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; %} }; diff --git a/xpcom/glue/nsWeakReference.cpp b/xpcom/glue/nsWeakReference.cpp index 57f372641..be263e1c2 100644 --- a/xpcom/glue/nsWeakReference.cpp +++ b/xpcom/glue/nsWeakReference.cpp @@ -37,6 +37,7 @@ public: // nsIWeakReference... NS_DECL_NSIWEAKREFERENCE virtual size_t SizeOfOnlyThis(mozilla::MallocSizeOf aMallocSizeOf) const override; + bool IsAlive() const override { return mReferent != nullptr; } private: MOZ_WEAKREF_DECL_OWNINGTHREAD |