зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
2.5 KiB
C++
99 строки
2.5 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_MutableBlobStorage_h
|
|
#define mozilla_dom_MutableBlobStorage_h
|
|
|
|
#include "mozilla/RefPtr.h"
|
|
#include "prio.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
class Blob;
|
|
class BlobImpl;
|
|
class MutableBlobStorage;
|
|
|
|
class MutableBlobStorageCallback
|
|
{
|
|
public:
|
|
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
|
|
|
|
NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
|
|
|
|
virtual void BlobStoreCompleted(MutableBlobStorage* aBlobStorage,
|
|
Blob* aBlob,
|
|
nsresult aRv) = 0;
|
|
};
|
|
|
|
// This class is main-thread only.
|
|
class MutableBlobStorage final
|
|
{
|
|
public:
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MutableBlobStorage);
|
|
|
|
enum MutableBlobStorageType
|
|
{
|
|
eOnlyInMemory,
|
|
eCouldBeInTemporaryFile,
|
|
};
|
|
|
|
explicit MutableBlobStorage(MutableBlobStorageType aType);
|
|
|
|
nsresult Append(const void* aData, uint32_t aLength);
|
|
|
|
// This method can be called just once.
|
|
// The callback will be called when the Blob is ready.
|
|
// The return value is the total size of the blob, when created.
|
|
uint64_t GetBlobWhenReady(nsISupports* aParent,
|
|
const nsACString& aContentType,
|
|
MutableBlobStorageCallback* aCallback);
|
|
|
|
void TemporaryFileCreated(PRFileDesc* aFD);
|
|
|
|
void CreateBlobAndRespond(already_AddRefed<nsISupports> aParent,
|
|
const nsACString& aContentType,
|
|
already_AddRefed<MutableBlobStorageCallback> aCallback);
|
|
|
|
void ErrorPropagated(nsresult aRv);
|
|
|
|
private:
|
|
~MutableBlobStorage();
|
|
|
|
bool ExpandBufferSize(uint64_t aSize);
|
|
|
|
bool ShouldBeTemporaryStorage(uint64_t aSize) const;
|
|
|
|
nsresult MaybeCreateTemporaryFile();
|
|
|
|
static nsresult DispatchToIOThread(Runnable* aRunnable);
|
|
|
|
// All these variables are touched on the main thread only.
|
|
|
|
void* mData;
|
|
uint64_t mDataLen;
|
|
uint64_t mDataBufferLen;
|
|
|
|
enum StorageState {
|
|
eKeepInMemory,
|
|
eInMemory,
|
|
eWaitingForTemporaryFile,
|
|
eInTemporaryFile,
|
|
eClosed
|
|
};
|
|
|
|
StorageState mStorageState;
|
|
|
|
PRFileDesc* mFD;
|
|
|
|
nsresult mErrorResult;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_MutableBlobStorage_h
|