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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef mozilla_ipc_nsIIPCSerializableInputStream_h
#define mozilla_ipc_nsIIPCSerializableInputStream_h
#include "mozilla/Attributes.h"
#include "mozilla/Maybe.h"
#include "nsISupports.h"
#include "nsTArrayForwardDeclare.h"
namespace mozilla {
namespace ipc {
class FileDescriptor;
class InputStreamParams;
} // namespace ipc
} // namespace mozilla
#define NS_IIPCSERIALIZABLEINPUTSTREAM_IID \
{0xb0211b14, 0xea6d, 0x40d4, {0x87, 0xb5, 0x7b, 0xe3, 0xdf, 0xac, 0x09, 0xd1}}
class NS_NO_VTABLE nsIIPCSerializableInputStream : public nsISupports
{
public:
typedef nsTArray<mozilla::ipc::FileDescriptor>
FileDescriptorArray;
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IIPCSERIALIZABLEINPUTSTREAM_IID)
virtual void
Serialize(mozilla::ipc::InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors) = 0;
virtual bool
Deserialize(const mozilla::ipc::InputStreamParams& aParams,
const FileDescriptorArray& aFileDescriptors) = 0;
// The number of bytes that are expected to be written when this
// stream is serialized. A value of Some(N) indicates that N bytes
// will be written to the IPC buffer, and will be used to decide
// upon an optimal transmission mechanism. A value of Nothing
// indicates that either serializing this stream will not require
// serializing its contents (eg. a file-backed stream, or a stream
// backed by an IPC actor), or the length of the stream's contents
// cannot be determined.
virtual mozilla::Maybe<uint64_t>
ExpectedSerializedLength() = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIIPCSerializableInputStream,
NS_IIPCSERIALIZABLEINPUTSTREAM_IID)
#define NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM \
virtual void \
Serialize(mozilla::ipc::InputStreamParams&, \
FileDescriptorArray&) override; \
\
virtual bool \
Deserialize(const mozilla::ipc::InputStreamParams&, \
const FileDescriptorArray&) override; \
\
virtual mozilla::Maybe<uint64_t> \
ExpectedSerializedLength() override;
#define NS_FORWARD_NSIIPCSERIALIZABLEINPUTSTREAM(_to) \
virtual void \
Serialize(mozilla::ipc::InputStreamParams& aParams, \
FileDescriptorArray& aFileDescriptors) override \
{ \
_to Serialize(aParams, aFileDescriptors); \
} \
\
virtual bool \
Deserialize(const mozilla::ipc::InputStreamParams& aParams, \
const FileDescriptorArray& aFileDescriptors) override \
{ \
return _to Deserialize(aParams, aFileDescriptors); \
} \
\
virtual mozilla::Maybe<uint64_t> \
ExpectedSerializedLength() override \
{ \
return _to ExpectedSerializedLength(); \
}
#define NS_FORWARD_SAFE_NSIIPCSERIALIZABLEINPUTSTREAM(_to) \
virtual void \
Serialize(mozilla::ipc::InputStreamParams& aParams, \
FileDescriptorArray& aFileDescriptors) override \
{ \
if (_to) { \
_to->Serialize(aParams, aFileDescriptors); \
} \
} \
\
virtual bool \
Deserialize(const mozilla::ipc::InputStreamParams& aParams, \
const FileDescriptorArray& aFileDescriptors) override \
{ \
return _to ? _to->Deserialize(aParams, aFileDescriptors) : false; \
} \
\
virtual mozilla::Maybe<uint64_t> \
ExpectedSerializedLength() override \
{ \
return _to ? _to->ExpectedSerializedLength() : Nothing(); \
}
#endif // mozilla_ipc_nsIIPCSerializableInputStream_h
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