159 lines
5.5 KiB
C++
159 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "StructuredCloneHelper.h"
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namespace mozilla {
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namespace dom {
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namespace {
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JSObject*
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StructuredCloneCallbacksRead(JSContext* aCx,
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JSStructuredCloneReader* aReader,
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uint32_t aTag, uint32_t aIndex,
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void* aClosure)
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{
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StructuredCloneHelperInternal* helper =
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static_cast<StructuredCloneHelperInternal*>(aClosure);
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MOZ_ASSERT(helper);
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return helper->ReadCallback(aCx, aReader, aTag, aIndex);
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}
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bool
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StructuredCloneCallbacksWrite(JSContext* aCx,
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JSStructuredCloneWriter* aWriter,
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JS::Handle<JSObject*> aObj,
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void* aClosure)
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{
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StructuredCloneHelperInternal* helper =
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static_cast<StructuredCloneHelperInternal*>(aClosure);
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MOZ_ASSERT(helper);
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return helper->WriteCallback(aCx, aWriter, aObj);
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}
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bool
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StructuredCloneCallbacksReadTransfer(JSContext* aCx,
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JSStructuredCloneReader* aReader,
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uint32_t aTag,
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void* aContent,
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uint64_t aExtraData,
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void* aClosure,
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JS::MutableHandleObject aReturnObject)
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{
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StructuredCloneHelperInternal* helper =
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static_cast<StructuredCloneHelperInternal*>(aClosure);
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MOZ_ASSERT(helper);
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return helper->ReadTransferCallback(aCx, aReader, aTag, aContent,
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aExtraData, aReturnObject);
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}
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bool
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StructuredCloneCallbacksWriteTransfer(JSContext* aCx,
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JS::Handle<JSObject*> aObj,
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void* aClosure,
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// Output:
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uint32_t* aTag,
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JS::TransferableOwnership* aOwnership,
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void** aContent,
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uint64_t* aExtraData)
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{
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StructuredCloneHelperInternal* helper =
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static_cast<StructuredCloneHelperInternal*>(aClosure);
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MOZ_ASSERT(helper);
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return helper->WriteTransferCallback(aCx, aObj, aTag, aOwnership, aContent,
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aExtraData);
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}
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void
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StructuredCloneCallbacksFreeTransfer(uint32_t aTag,
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JS::TransferableOwnership aOwnership,
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void* aContent,
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uint64_t aExtraData,
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void* aClosure)
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{
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StructuredCloneHelperInternal* helper =
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static_cast<StructuredCloneHelperInternal*>(aClosure);
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MOZ_ASSERT(helper);
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return helper->FreeTransferCallback(aTag, aOwnership, aContent, aExtraData);
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}
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void
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StructuredCloneCallbacksError(JSContext* aCx,
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uint32_t aErrorId)
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{
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NS_WARNING("Failed to clone data for the Console API in workers.");
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}
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const JSStructuredCloneCallbacks gCallbacks = {
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StructuredCloneCallbacksRead,
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StructuredCloneCallbacksWrite,
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StructuredCloneCallbacksError,
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StructuredCloneCallbacksReadTransfer,
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StructuredCloneCallbacksWriteTransfer,
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StructuredCloneCallbacksFreeTransfer
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};
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} // anonymous namespace
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bool
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StructuredCloneHelperInternal::Write(JSContext* aCx,
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JS::Handle<JS::Value> aValue)
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{
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MOZ_ASSERT(!mBuffer, "Double Write is not allowed");
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mBuffer = new JSAutoStructuredCloneBuffer(&gCallbacks, this);
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return mBuffer->write(aCx, aValue, &gCallbacks, this);
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}
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bool
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StructuredCloneHelperInternal::Read(JSContext* aCx,
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JS::MutableHandle<JS::Value> aValue)
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{
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MOZ_ASSERT(mBuffer, "Read() without Write() is not allowed.");
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bool ok = mBuffer->read(aCx, aValue, &gCallbacks, this);
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mBuffer = nullptr;
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return ok;
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}
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bool
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StructuredCloneHelperInternal::ReadTransferCallback(JSContext* aCx,
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JSStructuredCloneReader* aReader,
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uint32_t aTag,
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void* aContent,
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uint64_t aExtraData,
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JS::MutableHandleObject aReturnObject)
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{
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MOZ_CRASH("Nothing to read.");
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return false;
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}
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bool
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StructuredCloneHelperInternal::WriteTransferCallback(JSContext* aCx,
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JS::Handle<JSObject*> aObj,
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uint32_t* aTag,
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JS::TransferableOwnership* aOwnership,
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void** aContent,
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uint64_t* aExtraData)
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{
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// No transfers are supported by default.
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return false;
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}
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void
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StructuredCloneHelperInternal::FreeTransferCallback(uint32_t aTag,
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JS::TransferableOwnership aOwnership,
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void* aContent,
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uint64_t aExtraData)
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{
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MOZ_CRASH("Nothing to free.");
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}
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} // dom namespace
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} // mozilla namespace
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