1 files changed, 60 insertions, 0 deletions
diff --git a/xpcom/base/nsISupports.idl b/xpcom/base/nsISupports.idl
new file mode 100644
index 0000000000..45c6c5d589
--- /dev/null
+++ b/xpcom/base/nsISupports.idl
@@ -0,0 +1,60 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * The mother of all xpcom interfaces.
+ */
+
+#include "nsrootidl.idl"
+
+/**
+ * Basic component object model interface. Objects which implement
+ * this interface support runtime interface discovery (QueryInterface)
+ * and a reference counted memory model (AddRef/Release). This is
+ * modelled after the win32 IUnknown API.
+ *
+ * Historically, nsISupports needed to be binary compatible with COM's
+ * IUnknown, so the IID of nsISupports is the same as it. That is no
+ * longer a goal, and hopefully nobody depends on it. We may break
+ * this compatibility at any time.
+ */
+[scriptable, uuid(00000000-0000-0000-c000-000000000046)]
+interface nsISupports {
+
+  /**
+   * A run time mechanism for interface discovery.
+   * @param aIID [in] A requested interface IID
+   * @param aInstancePtr [out] A pointer to an interface pointer to
+   * receive the result.
+   * @return <b>NS_OK</b> if the interface is supported by the associated
+   * instance, <b>NS_NOINTERFACE</b> if it is not.
+   *
+   * aInstancePtr must not be null.
+   */
+  void QueryInterface(in nsIIDRef aIID,
+                      [iid_is(aIID), retval] out nsQIResult aInstancePtr);
+
+  /**
+   * Increases the reference count for this interface.
+   * The associated instance will not be deleted unless
+   * the reference count is returned to zero.
+   *
+   * @return The resulting reference count.
+   */
+  [noscript, notxpcom] MozExternalRefCountType AddRef();
+
+  /**
+   * Decreases the reference count for this interface.
+   * Generally, if the reference count returns to zero,
+   * the associated instance is deleted.
+   *
+   * @return The resulting reference count.
+   */
+  [noscript, notxpcom] MozExternalRefCountType Release();
+};
+
+%{C++
+#include "nsISupportsUtils.h"
+%}