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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "InputStreamLengthWrapper.h"
#include "mozilla/ipc/InputStreamUtils.h"
#include "nsISeekableStream.h"
#include "nsStreamUtils.h"
namespace mozilla {
using namespace ipc;
NS_IMPL_ADDREF(InputStreamLengthWrapper);
NS_IMPL_RELEASE(InputStreamLengthWrapper);
NS_INTERFACE_MAP_BEGIN(InputStreamLengthWrapper)
NS_INTERFACE_MAP_ENTRY(nsIInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsICloneableInputStream,
mWeakCloneableInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(
nsIIPCSerializableInputStream,
mWeakIPCSerializableInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsISeekableStream,
mWeakSeekableInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsITellableStream,
mWeakTellableInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStream,
mWeakAsyncInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIInputStreamCallback,
mWeakAsyncInputStream || !mInputStream)
NS_INTERFACE_MAP_ENTRY(nsIInputStreamLength)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInputStream)
NS_INTERFACE_MAP_END
/* static */
already_AddRefed<nsIInputStream> InputStreamLengthWrapper::MaybeWrap(
already_AddRefed<nsIInputStream> aInputStream, int64_t aLength) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
MOZ_ASSERT(inputStream);
nsCOMPtr<nsIInputStreamLength> length = do_QueryInterface(inputStream);
if (length) {
return inputStream.forget();
}
nsCOMPtr<nsIAsyncInputStreamLength> asyncLength =
do_QueryInterface(inputStream);
if (asyncLength) {
return inputStream.forget();
}
nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(inputStream);
if (!asyncStream) {
return inputStream.forget();
}
inputStream = new InputStreamLengthWrapper(inputStream.forget(), aLength);
return inputStream.forget();
}
InputStreamLengthWrapper::InputStreamLengthWrapper(
already_AddRefed<nsIInputStream> aInputStream, int64_t aLength)
: mWeakCloneableInputStream(nullptr),
mWeakIPCSerializableInputStream(nullptr),
mWeakSeekableInputStream(nullptr),
mWeakTellableInputStream(nullptr),
mWeakAsyncInputStream(nullptr),
mLength(aLength),
mConsumed(false),
mMutex("InputStreamLengthWrapper::mMutex") {
MOZ_ASSERT(mLength >= 0);
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
SetSourceStream(inputStream.forget());
}
InputStreamLengthWrapper::InputStreamLengthWrapper()
: mWeakCloneableInputStream(nullptr),
mWeakIPCSerializableInputStream(nullptr),
mWeakSeekableInputStream(nullptr),
mWeakTellableInputStream(nullptr),
mWeakAsyncInputStream(nullptr),
mLength(-1),
mConsumed(false),
mMutex("InputStreamLengthWrapper::mMutex") {}
InputStreamLengthWrapper::~InputStreamLengthWrapper() = default;
void InputStreamLengthWrapper::SetSourceStream(
already_AddRefed<nsIInputStream> aInputStream) {
MOZ_ASSERT(!mInputStream);
mInputStream = std::move(aInputStream);
nsCOMPtr<nsICloneableInputStream> cloneableStream =
do_QueryInterface(mInputStream);
if (cloneableStream && SameCOMIdentity(mInputStream, cloneableStream)) {
mWeakCloneableInputStream = cloneableStream;
}
nsCOMPtr<nsIIPCSerializableInputStream> serializableStream =
do_QueryInterface(mInputStream);
if (serializableStream && SameCOMIdentity(mInputStream, serializableStream)) {
mWeakIPCSerializableInputStream = serializableStream;
}
nsCOMPtr<nsISeekableStream> seekableStream = do_QueryInterface(mInputStream);
if (seekableStream && SameCOMIdentity(mInputStream, seekableStream)) {
mWeakSeekableInputStream = seekableStream;
}
nsCOMPtr<nsITellableStream> tellableStream = do_QueryInterface(mInputStream);
if (tellableStream && SameCOMIdentity(mInputStream, tellableStream)) {
mWeakTellableInputStream = tellableStream;
}
nsCOMPtr<nsIAsyncInputStream> asyncInputStream =
do_QueryInterface(mInputStream);
if (asyncInputStream && SameCOMIdentity(mInputStream, asyncInputStream)) {
mWeakAsyncInputStream = asyncInputStream;
}
}
// nsIInputStream interface
NS_IMETHODIMP
InputStreamLengthWrapper::Close() {
NS_ENSURE_STATE(mInputStream);
return mInputStream->Close();
}
NS_IMETHODIMP
InputStreamLengthWrapper::Available(uint64_t* aLength) {
NS_ENSURE_STATE(mInputStream);
return mInputStream->Available(aLength);
}
NS_IMETHODIMP
InputStreamLengthWrapper::Read(char* aBuffer, uint32_t aCount,
uint32_t* aReadCount) {
NS_ENSURE_STATE(mInputStream);
mConsumed = true;
return mInputStream->Read(aBuffer, aCount, aReadCount);
}
NS_IMETHODIMP
InputStreamLengthWrapper::ReadSegments(nsWriteSegmentFun aWriter,
void* aClosure, uint32_t aCount,
uint32_t* aResult) {
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
InputStreamLengthWrapper::IsNonBlocking(bool* aNonBlocking) {
NS_ENSURE_STATE(mInputStream);
return mInputStream->IsNonBlocking(aNonBlocking);
}
// nsICloneableInputStream interface
NS_IMETHODIMP
InputStreamLengthWrapper::GetCloneable(bool* aCloneable) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakCloneableInputStream);
mWeakCloneableInputStream->GetCloneable(aCloneable);
return NS_OK;
}
NS_IMETHODIMP
InputStreamLengthWrapper::Clone(nsIInputStream** aResult) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakCloneableInputStream);
nsCOMPtr<nsIInputStream> clonedStream;
nsresult rv = mWeakCloneableInputStream->Clone(getter_AddRefs(clonedStream));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIInputStream> stream =
new InputStreamLengthWrapper(clonedStream.forget(), mLength);
stream.forget(aResult);
return NS_OK;
}
// nsIAsyncInputStream interface
NS_IMETHODIMP
InputStreamLengthWrapper::CloseWithStatus(nsresult aStatus) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakAsyncInputStream);
mConsumed = true;
return mWeakAsyncInputStream->CloseWithStatus(aStatus);
}
NS_IMETHODIMP
InputStreamLengthWrapper::AsyncWait(nsIInputStreamCallback* aCallback,
uint32_t aFlags, uint32_t aRequestedCount,
nsIEventTarget* aEventTarget) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakAsyncInputStream);
nsCOMPtr<nsIInputStreamCallback> callback = this;
{
MutexAutoLock lock(mMutex);
if (mAsyncWaitCallback && aCallback) {
return NS_ERROR_FAILURE;
}
bool hadCallback = !!mAsyncWaitCallback;
mAsyncWaitCallback = aCallback;
if (!mAsyncWaitCallback) {
if (!hadCallback) {
// No pending operation.
return NS_OK;
}
// Abort current operation.
callback = nullptr;
}
}
return mWeakAsyncInputStream->AsyncWait(callback, aFlags, aRequestedCount,
aEventTarget);
}
// nsIInputStreamCallback
NS_IMETHODIMP
InputStreamLengthWrapper::OnInputStreamReady(nsIAsyncInputStream* aStream) {
MOZ_ASSERT(mInputStream);
MOZ_ASSERT(mWeakAsyncInputStream);
MOZ_ASSERT(mWeakAsyncInputStream == aStream);
nsCOMPtr<nsIInputStreamCallback> callback;
{
MutexAutoLock lock(mMutex);
// We have been canceled in the meanwhile.
if (!mAsyncWaitCallback) {
return NS_OK;
}
callback.swap(mAsyncWaitCallback);
}
MOZ_ASSERT(callback);
return callback->OnInputStreamReady(this);
}
// nsIIPCSerializableInputStream
void InputStreamLengthWrapper::Serialize(
mozilla::ipc::InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors, bool aDelayedStart,
uint32_t aMaxSize, uint32_t* aSizeUsed,
mozilla::ipc::ParentToChildStreamActorManager* aManager) {
SerializeInternal(aParams, aFileDescriptors, aDelayedStart, aMaxSize,
aSizeUsed, aManager);
}
void InputStreamLengthWrapper::Serialize(
mozilla::ipc::InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors, bool aDelayedStart,
uint32_t aMaxSize, uint32_t* aSizeUsed,
mozilla::ipc::ChildToParentStreamActorManager* aManager) {
SerializeInternal(aParams, aFileDescriptors, aDelayedStart, aMaxSize,
aSizeUsed, aManager);
}
template <typename M>
void InputStreamLengthWrapper::SerializeInternal(
mozilla::ipc::InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors, bool aDelayedStart,
uint32_t aMaxSize, uint32_t* aSizeUsed, M* aManager) {
MOZ_ASSERT(mInputStream);
MOZ_ASSERT(mWeakIPCSerializableInputStream);
InputStreamLengthWrapperParams params;
InputStreamHelper::SerializeInputStream(mInputStream, params.stream(),
aFileDescriptors, aDelayedStart,
aMaxSize, aSizeUsed, aManager);
params.length() = mLength;
params.consumed() = mConsumed;
aParams = params;
}
bool InputStreamLengthWrapper::Deserialize(
const mozilla::ipc::InputStreamParams& aParams,
const FileDescriptorArray& aFileDescriptors) {
MOZ_ASSERT(!mInputStream);
MOZ_ASSERT(!mWeakIPCSerializableInputStream);
if (aParams.type() != InputStreamParams::TInputStreamLengthWrapperParams) {
NS_ERROR("Received unknown parameters from the other process!");
return false;
}
const InputStreamLengthWrapperParams& params =
aParams.get_InputStreamLengthWrapperParams();
nsCOMPtr<nsIInputStream> stream = InputStreamHelper::DeserializeInputStream(
params.stream(), aFileDescriptors);
if (!stream) {
NS_WARNING("Deserialize failed!");
return false;
}
SetSourceStream(stream.forget());
mLength = params.length();
mConsumed = params.consumed();
return true;
}
// nsISeekableStream
NS_IMETHODIMP
InputStreamLengthWrapper::Seek(int32_t aWhence, int64_t aOffset) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakSeekableInputStream);
mConsumed = true;
return mWeakSeekableInputStream->Seek(aWhence, aOffset);
}
NS_IMETHODIMP
InputStreamLengthWrapper::SetEOF() {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakSeekableInputStream);
mConsumed = true;
return mWeakSeekableInputStream->SetEOF();
}
// nsITellableStream
NS_IMETHODIMP
InputStreamLengthWrapper::Tell(int64_t* aResult) {
NS_ENSURE_STATE(mInputStream);
NS_ENSURE_STATE(mWeakTellableInputStream);
return mWeakTellableInputStream->Tell(aResult);
}
// nsIInputStreamLength
NS_IMETHODIMP
InputStreamLengthWrapper::Length(int64_t* aLength) {
NS_ENSURE_STATE(mInputStream);
*aLength = mLength;
return NS_OK;
}
} // namespace mozilla