gecko-dev/ipc/glue/InputStreamUtils.cpp
Ben Turner 4b09919a18 Bug 781256 - 'Share FileDescriptors across processes in preparation for OS-level sandbox'. r=khuey+cjones.
--HG--
rename : netwerk/base/public/nsIIPCSerializable.idl => netwerk/base/public/nsIIPCSerializableObsolete.idl
extra : transplant_source : %EB%18%9D%E6%B1%C6%26%A2%16%F3%85g%1A%25%B1%8E%A1%E72e
2012-08-16 00:02:32 -04:00

80 lines
2.1 KiB
C++

/* 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 "InputStreamUtils.h"
#include "nsIIPCSerializableInputStream.h"
#include "mozilla/Assertions.h"
#include "nsComponentManagerUtils.h"
#include "nsDebug.h"
#include "nsID.h"
#include "nsMultiplexInputStream.h"
#include "nsNetCID.h"
#include "nsStringStream.h"
#include "nsThreadUtils.h"
using namespace mozilla::ipc;
namespace {
NS_DEFINE_CID(kStringInputStreamCID, NS_STRINGINPUTSTREAM_CID);
NS_DEFINE_CID(kFileInputStreamCID, NS_LOCALFILEINPUTSTREAM_CID);
NS_DEFINE_CID(kPartialFileInputStreamCID, NS_PARTIALLOCALFILEINPUTSTREAM_CID);
NS_DEFINE_CID(kMultiplexInputStreamCID, NS_MULTIPLEXINPUTSTREAM_CID);
} // anonymous namespace
namespace mozilla {
namespace ipc {
already_AddRefed<nsIInputStream>
DeserializeInputStream(const InputStreamParams& aParams)
{
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsIIPCSerializableInputStream> serializable;
switch (aParams.type()) {
case InputStreamParams::T__None:
NS_WARNING("This union has no type!");
return nullptr;
case InputStreamParams::TStringInputStreamParams:
serializable = do_CreateInstance(kStringInputStreamCID);
break;
case InputStreamParams::TFileInputStreamParams:
serializable = do_CreateInstance(kFileInputStreamCID);
break;
case InputStreamParams::TPartialFileInputStreamParams:
serializable = do_CreateInstance(kPartialFileInputStreamCID);
break;
case InputStreamParams::TMultiplexInputStreamParams:
serializable = do_CreateInstance(kMultiplexInputStreamCID);
break;
default:
NS_WARNING("Unknown params!");
return nullptr;
}
MOZ_ASSERT(serializable);
if (!serializable->Deserialize(aParams)) {
NS_WARNING("Deserialize failed!");
return nullptr;
}
nsCOMPtr<nsIInputStream> stream = do_QueryInterface(serializable);
MOZ_ASSERT(stream);
return stream.forget();
}
} // namespace ipc
} // namespace mozilla