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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/. */
/* ReadableStream pipe-to operation captured state. */
#ifndef builtin_streams_PipeToState_inl_h
#define builtin_streams_PipeToState_inl_h
#include "builtin/streams/PipeToState.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::Handle
#include "vm/JSContext.h" // JSContext
#include "vm/Runtime.h" // JSRuntime
#include "vm/Compartment-inl.h" // js::UnwrapAndDowncastValue
#include "vm/JSContext-inl.h" // JSContext::check
struct JS_PUBLIC_API JSContext;
class JS_PUBLIC_API JSObject;
namespace js {
/**
* Returns the unwrapped |AbortSignal| instance associated with a given pipe-to
* operation.
*
* The pipe-to operation must be known to have had an |AbortSignal| associated
* with it.
*
* If the signal is a wrapper, it will be unwrapped, so the result might not be
* an object from the currently active compartment.
*/
inline MOZ_MUST_USE JSObject* UnwrapSignalFromPipeToState(
JSContext* cx, JS::Handle<PipeToState*> pipeToState) {
cx->check(pipeToState);
MOZ_ASSERT(pipeToState->hasSignal());
return UnwrapAndDowncastValue(
cx, pipeToState->getFixedSlot(PipeToState::Slot_Signal),
cx->runtime()->maybeAbortSignalClass());
}
} // namespace js
#endif // builtin_streams_PipeToState_inl_h
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