gecko-dev/dom/base/MultipartBlobImpl.h
Nathan Froyd 817fe1571d Bug 1304017 - improve MultipartBlobImpl refcounting; r=baku
MultipartBlobImpl always requires copying the incoming BlobImpl array.
This copying, and its associated refcounting, is unnecessary in many
cases, as we're just going to delete the copied-from array anyway.  We
might as well pass in ownership when creating the multipart blob and
avoid all the overhead associated with copying and refcounting.
2016-09-20 21:29:28 -04:00

139 lines
4.0 KiB
C++

/* -*- 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/. */
#ifndef mozilla_dom_MultipartBlobImpl_h
#define mozilla_dom_MultipartBlobImpl_h
#include "mozilla/Attributes.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/Move.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/BlobBinding.h"
#include "mozilla/dom/FileBinding.h"
#include <algorithm>
#include "nsPIDOMWindow.h"
namespace mozilla {
namespace dom {
class MultipartBlobImpl final : public BlobImplBase
{
public:
NS_DECL_ISUPPORTS_INHERITED
// Create as a file
static already_AddRefed<MultipartBlobImpl>
Create(nsTArray<RefPtr<BlobImpl>>&& aBlobImpls,
const nsAString& aName,
const nsAString& aContentType,
ErrorResult& aRv);
// Create as a blob
static already_AddRefed<MultipartBlobImpl>
Create(nsTArray<RefPtr<BlobImpl>>&& aBlobImpls,
const nsAString& aContentType,
ErrorResult& aRv);
// Create as a file to be later initialized
explicit MultipartBlobImpl(const nsAString& aName)
: BlobImplBase(aName, EmptyString(), UINT64_MAX),
mIsFromNsIFile(false)
{
}
// Create as a blob to be later initialized
MultipartBlobImpl()
: BlobImplBase(EmptyString(), UINT64_MAX),
mIsFromNsIFile(false)
{
}
void InitializeBlob(ErrorResult& aRv);
void InitializeBlob(JSContext* aCx,
const Sequence<Blob::BlobPart>& aData,
const nsAString& aContentType,
bool aNativeEOL,
ErrorResult& aRv);
void InitializeChromeFile(Blob& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
void InitializeChromeFile(nsPIDOMWindowInner* aWindow,
const nsAString& aData,
const ChromeFilePropertyBag& aBag,
ErrorResult& aRv);
void InitializeChromeFile(nsPIDOMWindowInner* aWindow,
nsIFile* aData,
const ChromeFilePropertyBag& aBag,
bool aIsFromNsIFile,
ErrorResult& aRv);
virtual already_AddRefed<BlobImpl>
CreateSlice(uint64_t aStart, uint64_t aLength,
const nsAString& aContentType,
ErrorResult& aRv) override;
virtual uint64_t GetSize(ErrorResult& aRv) override
{
return mLength;
}
virtual void GetInternalStream(nsIInputStream** aInputStream,
ErrorResult& aRv) override;
virtual const nsTArray<RefPtr<BlobImpl>>* GetSubBlobImpls() const override
{
return mBlobImpls.Length() ? &mBlobImpls : nullptr;
}
virtual void GetMozFullPathInternal(nsAString& aFullPath,
ErrorResult& aRv) const override;
virtual nsresult
SetMutable(bool aMutable) override;
void SetName(const nsAString& aName)
{
mName = aName;
}
virtual bool MayBeClonedToOtherThreads() const override;
protected:
MultipartBlobImpl(nsTArray<RefPtr<BlobImpl>>&& aBlobImpls,
const nsAString& aName,
const nsAString& aContentType)
: BlobImplBase(aName, aContentType, UINT64_MAX),
mBlobImpls(Move(aBlobImpls)),
mIsFromNsIFile(false)
{
}
MultipartBlobImpl(nsTArray<RefPtr<BlobImpl>>&& aBlobImpls,
const nsAString& aContentType)
: BlobImplBase(aContentType, UINT64_MAX),
mBlobImpls(Move(aBlobImpls)),
mIsFromNsIFile(false)
{
}
virtual ~MultipartBlobImpl() {}
void SetLengthAndModifiedDate(ErrorResult& aRv);
nsTArray<RefPtr<BlobImpl>> mBlobImpls;
bool mIsFromNsIFile;
};
} // dom namespace
} // mozilla namespace
#endif // mozilla_dom_MultipartBlobImpl_h