зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
4.1 KiB
C++
98 строки
4.1 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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#ifndef mozilla_ipc_InputStreamUtils_h
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#define mozilla_ipc_InputStreamUtils_h
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#include "mozilla/ipc/InputStreamParams.h"
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#include "nsCOMPtr.h"
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#include "nsIInputStream.h"
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#include "nsTArray.h"
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namespace mozilla {
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namespace ipc {
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class FileDescriptor;
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class PFileDescriptorSetChild;
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class PFileDescriptorSetParent;
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class PChildToParentStreamChild;
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class PParentToChildStreamParent;
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// Provide two interfaces for sending PParentToChildStream and
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// PFileDescriptorSet constructor messages.
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class ParentToChildStreamActorManager {
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public:
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virtual PParentToChildStreamParent* SendPParentToChildStreamConstructor(
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PParentToChildStreamParent* aActor) = 0;
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virtual PFileDescriptorSetParent* SendPFileDescriptorSetConstructor(
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const FileDescriptor& aFD) = 0;
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};
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class ChildToParentStreamActorManager {
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public:
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virtual PChildToParentStreamChild* SendPChildToParentStreamConstructor(
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PChildToParentStreamChild* aActor) = 0;
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virtual PFileDescriptorSetChild* SendPFileDescriptorSetConstructor(
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const FileDescriptor& aFD) = 0;
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};
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// If you want to serialize an inputStream, please use AutoIPCStream.
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class InputStreamHelper {
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public:
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// These 2 methods allow to serialize an inputStream into InputStreamParams.
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// The manager is needed in case a stream needs to serialize itself as
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// IPCRemoteStream.
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// The stream serializes itself fully only if the resulting IPC message will
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// be smaller than |aMaxSize|. Otherwise, the stream serializes itself as
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// IPCRemoteStream, and, its content will be sent to the other side of the IPC
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// pipe in chunks. This sending can start immediatelly or at the first read
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// based on the value of |aDelayedStart|. The IPC message size is returned
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// into |aSizeUsed|.
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static void SerializeInputStream(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize,
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uint32_t* aSizeUsed,
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ParentToChildStreamActorManager* aManager);
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static void SerializeInputStream(nsIInputStream* aInputStream,
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InputStreamParams& aParams,
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nsTArray<FileDescriptor>& aFileDescriptors,
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bool aDelayedStart, uint32_t aMaxSize,
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uint32_t* aSizeUsed,
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ChildToParentStreamActorManager* aManager);
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// When a stream wants to serialize itself as IPCRemoteStream, it uses one of
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// these methods.
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static void SerializeInputStreamAsPipe(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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bool aDelayedStart, ParentToChildStreamActorManager* aManager);
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static void SerializeInputStreamAsPipe(
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nsIInputStream* aInputStream, InputStreamParams& aParams,
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bool aDelayedStart, ChildToParentStreamActorManager* aManager);
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// After the sending of the inputStream into the IPC pipe, some of the
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// InputStreamParams data struct needs to be activated (IPCRemoteStream).
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// These 2 methods do that.
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static void PostSerializationActivation(InputStreamParams& aParams,
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bool aConsumedByIPC,
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bool aDelayedStart);
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static void PostSerializationActivation(Maybe<InputStreamParams>& aParams,
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bool aConsumedByIPC,
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bool aDelayedStart);
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static already_AddRefed<nsIInputStream> DeserializeInputStream(
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const InputStreamParams& aParams,
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const nsTArray<FileDescriptor>& aFileDescriptors);
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // mozilla_ipc_InputStreamUtils_h
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