gecko-dev/dom/file/ipc/IPCBlobInputStreamStorage.h

75 строки
1.9 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_ipc_IPCBlobInputStreamStorage_h
#define mozilla_dom_ipc_IPCBlobInputStreamStorage_h
#include "mozilla/RefPtr.h"
#include "nsClassHashtable.h"
#include "nsIObserver.h"
class nsIInputStream;
struct nsID;
namespace mozilla {
namespace dom {
class IPCBlobInputStreamParentCallback;
class IPCBlobInputStreamStorage final : public nsIObserver
{
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
// This initializes the singleton and it must be called on the main-thread.
static void
Initialize();
static IPCBlobInputStreamStorage*
Get();
void
AddStream(nsIInputStream* aInputStream, const nsID& aID, uint64_t aSize,
uint64_t aChildID);
void
ForgetStream(const nsID& aID);
void
GetStream(const nsID& aID, uint64_t aStart, uint64_t aLength,
nsIInputStream** aInputStream);
void
StoreCallback(const nsID& aID, IPCBlobInputStreamParentCallback* aCallback);
already_AddRefed<IPCBlobInputStreamParentCallback>
TakeCallback(const nsID& aID);
private:
IPCBlobInputStreamStorage();
~IPCBlobInputStreamStorage();
struct StreamData
{
nsCOMPtr<nsIInputStream> mInputStream;
RefPtr<IPCBlobInputStreamParentCallback> mCallback;
// This is the Process ID connected with this inputStream. We need to store
// this information in order to delete it if the child crashes/shutdowns.
uint64_t mChildID;
uint64_t mSize;
};
nsClassHashtable<nsIDHashKey, StreamData> mStorage;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_ipc_IPCBlobInputStreamStorage_h