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-rw-r--r--xpcom/base/nsIUUIDGenerator.idl39
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diff --git a/xpcom/base/nsIUUIDGenerator.idl b/xpcom/base/nsIUUIDGenerator.idl
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+/* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "nsISupports.idl"
+
+[ptr] native nsNonConstIDPtr(nsID);
+
+/**
+ * nsIUUIDGenerator is implemented by a service that can generate
+ * universally unique identifiers, ideally using any platform-native
+ * method for generating UUIDs.
+ */
+[scriptable, uuid(138ad1b2-c694-41cc-b201-333ce936d8b8)]
+interface nsIUUIDGenerator : nsISupports
+{
+ /**
+ * Obtains a new UUID using appropriate platform-specific methods to
+ * obtain a nsID that can be considered to be globally unique.
+ *
+ * @returns an nsID filled in with a new UUID.
+ *
+ * @throws NS_ERROR_FAILURE if a UUID cannot be generated (e.g. if
+ * an underlying source of randomness is not available)
+ */
+ nsIDPtr generateUUID();
+
+ /**
+ * Obtain a new UUID like the generateUUID method, but place it in
+ * the provided nsID pointer instead of allocating a new nsID.
+ *
+ * @param id an existing nsID pointer where the UUID will be stored.
+ *
+ * @throws NS_ERROR_FAILURE if a UUID cannot be generated (e.g. if
+ * an underlying source of randomness is not available)
+ */
+ [noscript] void generateUUIDInPlace(in nsNonConstIDPtr id);
+};