gecko-dev/netwerk/base/MemoryDownloader.h
Nicholas Nethercote 3b0485fcdb Bug 1294645 - Don't use NS_CALLBACK for callbacks in nsI{Input,Output,UnicharInput},Stream.idl. r=froydnj.
Slightly less than half (93 / 210) of the NS_METHOD instances in the codebase
are because of the use of NS_CALLBACK in
nsI{Input,Output,UnicharInput},Stream.idl. The use of __stdcall on Win32 isn't
important for these callbacks because they are only used as arguments to
[noscript] methods.

This patch converts them to vanilla |nsresult| functions. It increases the size
of xul.dll by about ~600 bytes, which is about 0.001%.

--HG--
extra : rebase_source : c15d85298e0975fd030cd8f8f8e54501f453959b
2016-08-12 17:36:22 +10:00

66 lines
2.0 KiB
C++

/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_net_MemoryDownloader_h__
#define mozilla_net_MemoryDownloader_h__
#include "mozilla/UniquePtr.h"
#include "nsCOMPtr.h"
#include "nsIStreamListener.h"
#include "nsTArray.h"
/**
* mozilla::net::MemoryDownloader
*
* This class is similar to nsIDownloader, but stores the downloaded
* stream in memory instead of a file. Ownership of the temporary
* memory is transferred to the observer when download is complete;
* there is no need to retain a reference to the downloader.
*/
namespace mozilla {
namespace net {
class MemoryDownloader final : public nsIStreamListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
typedef mozilla::UniquePtr<FallibleTArray<uint8_t>> Data;
class IObserver : public nsISupports {
public:
// Note: aData may be null if (and only if) aStatus indicates failure.
virtual void OnDownloadComplete(MemoryDownloader* aDownloader,
nsIRequest* aRequest,
nsISupports* aCtxt,
nsresult aStatus,
Data aData) = 0;
};
explicit MemoryDownloader(IObserver* aObserver);
private:
virtual ~MemoryDownloader();
static nsresult ConsumeData(nsIInputStream *in,
void *closure,
const char *fromRawSegment,
uint32_t toOffset,
uint32_t count,
uint32_t *writeCount);
RefPtr<IObserver> mObserver;
Data mData;
nsresult mStatus;
};
} // namespace net
} // namespace mozilla
#endif // mozilla_net_MemoryDownloader_h__