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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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/. */
/* Queue-with-sizes operations. */
#ifndef builtin_streams_QueueWithSizes_h
#define builtin_streams_QueueWithSizes_h
#include "mozilla/Assertions.h" // MOZ_ASSERT
#include "mozilla/Attributes.h" // MOZ_MUST_USE
#include "jstypes.h" // JS_PUBLIC_API
#include "js/RootingAPI.h" // JS::{,Mutable}Handle
#include "js/Value.h" // JS::Value
#include "vm/List.h" // js::ListObject
struct JS_PUBLIC_API JSContext;
namespace js {
class StreamController;
/**
* Streams spec, 6.2.1. DequeueValue ( container ) nothrow
*/
extern MOZ_MUST_USE bool DequeueValue(
JSContext* cx, JS::Handle<StreamController*> unwrappedContainer,
JS::MutableHandle<JS::Value> chunk);
/**
* Streams spec, 6.2.1. DequeueValue ( container ) nothrow
* when the dequeued value is ignored.
*/
extern void DequeueValue(StreamController* unwrappedContainer, JSContext* cx);
/**
* Streams spec, 6.2.2. EnqueueValueWithSize ( container, value, size ) throws
*/
extern MOZ_MUST_USE bool EnqueueValueWithSize(
JSContext* cx, JS::Handle<StreamController*> unwrappedContainer,
JS::Handle<JS::Value> value, JS::Handle<JS::Value> sizeVal);
/**
* Streams spec, 6.2.4. ResetQueue ( container ) nothrow
*/
extern MOZ_MUST_USE bool ResetQueue(
JSContext* cx, JS::Handle<StreamController*> unwrappedContainer);
inline bool QueueIsEmpty(ListObject* unwrappedQueue) {
if (unwrappedQueue->isEmpty()) {
return true;
}
MOZ_ASSERT((unwrappedQueue->length() % 2) == 0,
"queue-with-sizes must consist of (value, size) element pairs and "
"so must have even length");
return false;
}
} // namespace js
#endif // builtin_streams_QueueWithSizes_h
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