зеркало из https://github.com/mozilla/gecko-dev.git
143 строки
4.3 KiB
C++
143 строки
4.3 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Mutex.h"
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#include "nsTransportUtils.h"
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#include "nsITransport.h"
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#include "nsProxyRelease.h"
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#include "nsThreadUtils.h"
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#include "nsAutoPtr.h"
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#include "nsCOMPtr.h"
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using namespace mozilla;
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//-----------------------------------------------------------------------------
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class nsTransportStatusEvent;
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class nsTransportEventSinkProxy : public nsITransportEventSink
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{
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSITRANSPORTEVENTSINK
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nsTransportEventSinkProxy(nsITransportEventSink *sink,
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nsIEventTarget *target)
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: mSink(sink)
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, mTarget(target)
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, mLock("nsTransportEventSinkProxy.mLock")
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, mLastEvent(nullptr)
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{
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NS_ADDREF(mSink);
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}
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private:
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virtual ~nsTransportEventSinkProxy()
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{
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// our reference to mSink could be the last, so be sure to release
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// it on the target thread. otherwise, we could get into trouble.
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NS_ProxyRelease(mTarget, dont_AddRef(mSink));
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}
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public:
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nsITransportEventSink *mSink;
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nsCOMPtr<nsIEventTarget> mTarget;
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Mutex mLock;
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nsTransportStatusEvent *mLastEvent;
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};
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class nsTransportStatusEvent : public Runnable
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{
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public:
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nsTransportStatusEvent(nsTransportEventSinkProxy *proxy,
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nsITransport *transport,
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nsresult status,
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int64_t progress,
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int64_t progressMax)
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: mProxy(proxy)
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, mTransport(transport)
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, mStatus(status)
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, mProgress(progress)
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, mProgressMax(progressMax)
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{}
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~nsTransportStatusEvent() {}
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NS_IMETHOD Run() override
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{
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// since this event is being handled, we need to clear the proxy's ref.
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// if not coalescing all, then last event may not equal self!
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{
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MutexAutoLock lock(mProxy->mLock);
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if (mProxy->mLastEvent == this)
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mProxy->mLastEvent = nullptr;
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}
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mProxy->mSink->OnTransportStatus(mTransport, mStatus, mProgress,
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mProgressMax);
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return NS_OK;
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}
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RefPtr<nsTransportEventSinkProxy> mProxy;
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// parameters to OnTransportStatus
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nsCOMPtr<nsITransport> mTransport;
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nsresult mStatus;
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int64_t mProgress;
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int64_t mProgressMax;
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};
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NS_IMPL_ISUPPORTS(nsTransportEventSinkProxy, nsITransportEventSink)
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NS_IMETHODIMP
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nsTransportEventSinkProxy::OnTransportStatus(nsITransport *transport,
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nsresult status,
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int64_t progress,
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int64_t progressMax)
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{
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nsresult rv = NS_OK;
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RefPtr<nsTransportStatusEvent> event;
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{
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MutexAutoLock lock(mLock);
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// try to coalesce events! ;-)
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if (mLastEvent && (mLastEvent->mStatus == status)) {
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mLastEvent->mStatus = status;
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mLastEvent->mProgress = progress;
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mLastEvent->mProgressMax = progressMax;
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}
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else {
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event = new nsTransportStatusEvent(this, transport, status,
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progress, progressMax);
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if (!event)
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rv = NS_ERROR_OUT_OF_MEMORY;
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mLastEvent = event; // weak ref
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}
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}
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if (event) {
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rv = mTarget->Dispatch(event, NS_DISPATCH_NORMAL);
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if (NS_FAILED(rv)) {
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NS_WARNING("unable to post transport status event");
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MutexAutoLock lock(mLock); // cleanup.. don't reference anymore!
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mLastEvent = nullptr;
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}
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}
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return rv;
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}
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//-----------------------------------------------------------------------------
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nsresult
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net_NewTransportEventSinkProxy(nsITransportEventSink **result,
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nsITransportEventSink *sink,
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nsIEventTarget *target)
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{
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*result = new nsTransportEventSinkProxy(sink, target);
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if (!*result)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*result);
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return NS_OK;
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}
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