gecko/netwerk/base/ClosingService.h

72 lines
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et 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 ClosingService_h__
#define ClosingService_h__
#include "nsTArray.h"
#include "nspr.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Monitor.h"
//-----------------------------------------------------------------------------
// ClosingService
//-----------------------------------------------------------------------------
// A helper class carrying call to PR_Close on FD to a separate thread -
// closingThread. This may be a workaround for shutdown blocks that are caused
// by serial calls to close on UDP and TCP sockets.
// This service is started by nsIOService and also the class adds itself as an
// observer to "xpcom-shutdown-threads" notification where we join the thread
// and remove reference.
// During worktime of the thread the class is also self-referenced,
// since observer service might throw the reference away sooner than the thread
// is actually done.
namespace mozilla {
namespace net {
class ClosingService final
{
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ClosingService)
ClosingService();
// Attaching this layer on tcp or udp sockets PRClose will be send to the
// closingThread.
static nsresult AttachIOLayer(PRFileDesc *aFd);
static void Start();
static void Shutdown();
void PostRequest(PRFileDesc *aFd);
private:
~ClosingService() {}
nsresult StartInternal();
void ShutdownInternal();
void ThreadFunc();
static void ThreadFunc(void *aClosure)
{ static_cast<ClosingService*>(aClosure)->ThreadFunc(); }
void SendPRCloseTelemetry(PRIntervalTime aStart,
mozilla::Telemetry::ID aIDNormal,
mozilla::Telemetry::ID aIDShutdown,
mozilla::Telemetry::ID aIDConnectivityChange,
mozilla::Telemetry::ID aIDLinkChange,
mozilla::Telemetry::ID aIDOffline);
static ClosingService* sInstance;
Atomic<bool> mShutdown;
nsTArray<PRFileDesc *> mQueue;
mozilla::Monitor mMonitor;
PRThread *mThread;
};
} // namespace net
} // namespace mozilla
#endif // ClosingService_h_