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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
#include "nsIBinaryOutputStream.idl"
/**
* @See nsIObjectInputStream
* @See nsIBinaryOutputStream
*/
[scriptable, builtinclass, uuid(92c898ac-5fde-4b99-87b3-5d486422094b)]
interface nsIObjectOutputStream : nsIBinaryOutputStream
{
/**
* Write the object whose "root" or XPCOM-identity nsISupports is aObject.
* The cause for writing this object is a strong or weak reference, so the
* aIsStrongRef argument must tell which kind of pointer is being followed
* here during serialization.
*
* If the object has only one strong reference in the serialization and no
* weak refs, use writeSingleRefObject. This is a valuable optimization:
* it saves space in the stream, and cycles on both ends of the process.
*
* If the reference being serialized is a pointer to an interface not on
* the primary inheritance chain ending in the root nsISupports, you must
* call writeCompoundObject instead of this method.
*/
void writeObject(in nsISupports aObject, in boolean aIsStrongRef);
/**
* Write an object referenced singly and strongly via its root nsISupports
* or a subclass of its root nsISupports. There must not be other refs to
* aObject in memory, or in the serialization.
*/
void writeSingleRefObject(in nsISupports aObject);
/**
* Write the object referenced by an interface pointer at aObject that
* inherits from a non-primary nsISupports, i.e., a reference to one of
* the multiply inherited interfaces derived from an nsISupports other
* than the root or XPCOM-identity nsISupports; or a reference to an
* inner object in the case of true XPCOM aggregation. aIID identifies
* this interface.
*/
void writeCompoundObject(in nsISupports aObject,
in nsIIDRef aIID,
in boolean aIsStrongRef);
void writeID(in nsIDRef aID);
/**
* Optimized serialization support -- see nsIStreamBufferAccess.idl.
*/
[notxpcom] charPtr getBuffer(in uint32_t aLength, in uint32_t aAlignMask);
[notxpcom] void putBuffer(in charPtr aBuffer, in uint32_t aLength);
};
%{C++
already_AddRefed<nsIObjectOutputStream>
NS_NewObjectOutputStream(nsIOutputStream* aOutputStream);
inline nsresult
NS_WriteOptionalObject(nsIObjectOutputStream* aStream, nsISupports* aObject,
bool aIsStrongRef)
{
bool nonnull = (aObject != nullptr);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteObject(aObject, aIsStrongRef);
return rv;
}
inline nsresult
NS_WriteOptionalSingleRefObject(nsIObjectOutputStream* aStream,
nsISupports* aObject)
{
bool nonnull = (aObject != nullptr);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteSingleRefObject(aObject);
return rv;
}
inline nsresult
NS_WriteOptionalCompoundObject(nsIObjectOutputStream* aStream,
nsISupports* aObject,
const nsIID& aIID,
bool aIsStrongRef)
{
bool nonnull = (aObject != nullptr);
nsresult rv = aStream->WriteBoolean(nonnull);
if (NS_SUCCEEDED(rv) && nonnull)
rv = aStream->WriteCompoundObject(aObject, aIID, aIsStrongRef);
return rv;
}
%}
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