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/*
* 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(STREAMS_API)
function cancel(reason)
{
"use strict";
if (!@isReadableStreamReader(this))
return @Promise.@reject(new @TypeError("Function should be called on a ReadableStreamReader"));
if (!this.@ownerReadableStream)
return @Promise.@reject(new @TypeError("cancel() called on a reader owned by no readable stream"));
return @cancelReadableStream(this.@ownerReadableStream, reason);
}
function read()
{
"use strict";
if (!@isReadableStreamReader(this))
return @Promise.@reject(new @TypeError("Function should be called on a ReadableStreamReader"));
if (!this.@ownerReadableStream)
return @Promise.@reject(new @TypeError("read() called on a reader owned by no readable stream"));
return @readFromReadableStreamReader(this);
}
function releaseLock()
{
"use strict";
if (!@isReadableStreamReader(this))
throw new @TypeError("Function should be called on a ReadableStreamReader");
const stream = this.@ownerReadableStream;
if (!stream)
return;
if (this.@readRequests.length)
throw new @TypeError("There are still pending read requests, cannot release the lock");
if (stream.@state === @streamReadable)
this.@closedPromiseCapability.@reject.@call(@undefined, new @TypeError("releasing lock of reader whose stream is still in readable state"));
else
this.@closedPromiseCapability = { @promise: @Promise.@reject(new @TypeError("reader released lock")) };
stream.@reader = @undefined;
this.@ownerReadableStream = null;
}
function closed()
{
"use strict";
if (!@isReadableStreamReader(this))
return @Promise.@reject(new @TypeError("Callee of closed is not a ReadableStreamReader"));
return this.@closedPromiseCapability.@promise;
}
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