1 files changed, 77 insertions, 0 deletions
diff --git a/Source/WebCore/Modules/streams/ReadableStreamDefaultReader.js b/Source/WebCore/Modules/streams/ReadableStreamDefaultReader.js
new file mode 100644
index 000000000..d5a51c3a0
--- /dev/null
+++ b/Source/WebCore/Modules/streams/ReadableStreamDefaultReader.js
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 Canon Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// @conditional=ENABLE(READABLE_STREAM_API)
+
+function cancel(reason)
+{
+    "use strict";
+
+    if (!@isReadableStreamDefaultReader(this))
+        return @Promise.@reject(@makeThisTypeError("ReadableStreamDefaultReader", "cancel"));
+
+    if (!this.@ownerReadableStream)
+        return @Promise.@reject(new @TypeError("cancel() called on a reader owned by no readable stream"));
+
+    return @readableStreamReaderGenericCancel(this, reason);
+}
+
+function read()
+{
+    "use strict";
+
+    if (!@isReadableStreamDefaultReader(this))
+        return @Promise.@reject(@makeThisTypeError("ReadableStreamDefaultReader", "read"));
+    if (!this.@ownerReadableStream)
+        return @Promise.@reject(new @TypeError("read() called on a reader owned by no readable stream"));
+
+    return @readableStreamDefaultReaderRead(this);
+}
+
+function releaseLock()
+{
+    "use strict";
+
+    if (!@isReadableStreamDefaultReader(this))
+        throw @makeThisTypeError("ReadableStreamDefaultReader", "releaseLock");
+
+    if (!this.@ownerReadableStream)
+        return;
+
+    if (this.@readRequests.length)
+        @throwTypeError("There are still pending read requests, cannot release the lock");
+
+    @readableStreamReaderGenericRelease(this);
+}
+
+function closed()
+{
+    "use strict";
+
+    if (!@isReadableStreamDefaultReader(this))
+        return @Promise.@reject(@makeGetterTypeError("ReadableStreamDefaultReader", "closed"));
+
+    return this.@closedPromiseCapability.@promise;
+}