mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
dd38904e41
Backs out 952d14a9e508 (bug 707173), c170c678c9ac (bug 708305), 0a5f66d5d8e4 (bug 707662), 3204b70435fe (bug 706236) and the main landing range 48807fde0339:0bd45ead1676 (bug 528288).
367 lines
14 KiB
C++
367 lines
14 KiB
C++
/* vim:set ts=4 sw=4 sts=4 et cin: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsHttpConnectionMgr_h__
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#define nsHttpConnectionMgr_h__
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#include "nsHttpConnectionInfo.h"
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#include "nsHttpConnection.h"
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#include "nsHttpTransaction.h"
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#include "nsTArray.h"
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#include "nsThreadUtils.h"
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#include "nsClassHashtable.h"
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#include "nsAutoPtr.h"
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#include "mozilla/ReentrantMonitor.h"
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#include "nsISocketTransportService.h"
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#include "nsIObserver.h"
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#include "nsITimer.h"
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class nsHttpPipeline;
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//-----------------------------------------------------------------------------
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class nsHttpConnectionMgr : public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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// parameter names
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enum nsParamName {
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MAX_CONNECTIONS,
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MAX_CONNECTIONS_PER_HOST,
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MAX_CONNECTIONS_PER_PROXY,
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MAX_PERSISTENT_CONNECTIONS_PER_HOST,
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MAX_PERSISTENT_CONNECTIONS_PER_PROXY,
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MAX_REQUEST_DELAY,
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MAX_PIPELINED_REQUESTS
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};
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//-------------------------------------------------------------------------
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// NOTE: functions below may only be called on the main thread.
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//-------------------------------------------------------------------------
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nsHttpConnectionMgr();
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nsresult Init(PRUint16 maxConnections,
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PRUint16 maxConnectionsPerHost,
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PRUint16 maxConnectionsPerProxy,
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PRUint16 maxPersistentConnectionsPerHost,
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PRUint16 maxPersistentConnectionsPerProxy,
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PRUint16 maxRequestDelay,
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PRUint16 maxPipelinedRequests);
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nsresult Shutdown();
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//-------------------------------------------------------------------------
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// NOTE: functions below may be called on any thread.
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//-------------------------------------------------------------------------
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// Schedules next pruning of dead connection to happen after
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// given time.
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void PruneDeadConnectionsAfter(PRUint32 time);
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// Stops timer scheduled for next pruning of dead connections.
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void StopPruneDeadConnectionsTimer();
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// adds a transaction to the list of managed transactions.
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nsresult AddTransaction(nsHttpTransaction *, PRInt32 priority);
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// called to reschedule the given transaction. it must already have been
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// added to the connection manager via AddTransaction.
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nsresult RescheduleTransaction(nsHttpTransaction *, PRInt32 priority);
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// cancels a transaction w/ the given reason.
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nsresult CancelTransaction(nsHttpTransaction *, nsresult reason);
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// called to force the connection manager to prune its list of idle
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// connections.
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nsresult PruneDeadConnections();
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// Close all idle persistent connections and prevent any active connections
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// from being reused.
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nsresult ClosePersistentConnections();
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// called to get a reference to the socket transport service. the socket
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// transport service is not available when the connection manager is down.
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nsresult GetSocketThreadTarget(nsIEventTarget **);
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// called when a connection is done processing a transaction. if the
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// connection can be reused then it will be added to the idle list, else
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// it will be closed.
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nsresult ReclaimConnection(nsHttpConnection *conn);
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// called to update a parameter after the connection manager has already
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// been initialized.
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nsresult UpdateParam(nsParamName name, PRUint16 value);
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//-------------------------------------------------------------------------
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// NOTE: functions below may be called only on the socket thread.
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//-------------------------------------------------------------------------
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// removes the next transaction for the specified connection from the
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// pending transaction queue.
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void AddTransactionToPipeline(nsHttpPipeline *);
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// called to force the transaction queue to be processed once more, giving
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// preference to the specified connection.
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nsresult ProcessPendingQ(nsHttpConnectionInfo *);
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// This is used to force an idle connection to be closed and removed from
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// the idle connection list. It is called when the idle connection detects
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// that the network peer has closed the transport.
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nsresult CloseIdleConnection(nsHttpConnection *);
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private:
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virtual ~nsHttpConnectionMgr();
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class nsHalfOpenSocket;
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// nsConnectionEntry
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//
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// mCT maps connection info hash key to nsConnectionEntry object, which
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// contains list of active and idle connections as well as the list of
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// pending transactions.
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//
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struct nsConnectionEntry
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{
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nsConnectionEntry(nsHttpConnectionInfo *ci)
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: mConnInfo(ci)
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{
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NS_ADDREF(mConnInfo);
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}
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~nsConnectionEntry() { NS_RELEASE(mConnInfo); }
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nsHttpConnectionInfo *mConnInfo;
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nsTArray<nsHttpTransaction*> mPendingQ; // pending transaction queue
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nsTArray<nsHttpConnection*> mActiveConns; // active connections
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nsTArray<nsHttpConnection*> mIdleConns; // idle persistent connections
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nsTArray<nsHalfOpenSocket*> mHalfOpens;
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};
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// nsConnectionHandle
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//
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// thin wrapper around a real connection, used to keep track of references
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// to the connection to determine when the connection may be reused. the
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// transaction (or pipeline) owns a reference to this handle. this extra
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// layer of indirection greatly simplifies consumer code, avoiding the
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// need for consumer code to know when to give the connection back to the
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// connection manager.
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//
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class nsConnectionHandle : public nsAHttpConnection
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSAHTTPCONNECTION
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nsConnectionHandle(nsHttpConnection *conn) { NS_ADDREF(mConn = conn); }
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virtual ~nsConnectionHandle();
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nsHttpConnection *mConn;
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};
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// nsHalfOpenSocket is used to hold the state of an opening TCP socket
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// while we wait for it to establish and bind it to a connection
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class nsHalfOpenSocket : public nsIOutputStreamCallback,
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public nsITransportEventSink,
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public nsIInterfaceRequestor,
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public nsITimerCallback
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOUTPUTSTREAMCALLBACK
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NS_DECL_NSITRANSPORTEVENTSINK
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NS_DECL_NSIINTERFACEREQUESTOR
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NS_DECL_NSITIMERCALLBACK
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nsHalfOpenSocket(nsConnectionEntry *ent,
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nsHttpTransaction *trans);
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~nsHalfOpenSocket();
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nsresult SetupStreams(nsISocketTransport **,
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nsIAsyncInputStream **,
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nsIAsyncOutputStream **,
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bool isBackup);
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nsresult SetupPrimaryStreams();
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nsresult SetupBackupStreams();
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void SetupBackupTimer();
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void CancelBackupTimer();
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void Abandon();
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nsHttpTransaction *Transaction() { return mTransaction; }
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private:
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nsConnectionEntry *mEnt;
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nsRefPtr<nsHttpTransaction> mTransaction;
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nsCOMPtr<nsISocketTransport> mSocketTransport;
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nsCOMPtr<nsIAsyncOutputStream> mStreamOut;
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nsCOMPtr<nsIAsyncInputStream> mStreamIn;
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// for syn retry
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nsCOMPtr<nsITimer> mSynTimer;
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nsCOMPtr<nsISocketTransport> mBackupTransport;
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nsCOMPtr<nsIAsyncOutputStream> mBackupStreamOut;
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nsCOMPtr<nsIAsyncInputStream> mBackupStreamIn;
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};
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friend class nsHalfOpenSocket;
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//-------------------------------------------------------------------------
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// NOTE: these members may be accessed from any thread (use mReentrantMonitor)
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//-------------------------------------------------------------------------
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PRInt32 mRef;
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mozilla::ReentrantMonitor mReentrantMonitor;
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nsCOMPtr<nsIEventTarget> mSocketThreadTarget;
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// connection limits
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PRUint16 mMaxConns;
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PRUint16 mMaxConnsPerHost;
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PRUint16 mMaxConnsPerProxy;
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PRUint16 mMaxPersistConnsPerHost;
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PRUint16 mMaxPersistConnsPerProxy;
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PRUint16 mMaxRequestDelay; // in seconds
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PRUint16 mMaxPipelinedRequests;
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bool mIsShuttingDown;
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//-------------------------------------------------------------------------
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// NOTE: these members are only accessed on the socket transport thread
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//-------------------------------------------------------------------------
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static PLDHashOperator ProcessOneTransactionCB(const nsACString &, nsAutoPtr<nsConnectionEntry> &, void *);
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static PLDHashOperator PruneDeadConnectionsCB(const nsACString &, nsAutoPtr<nsConnectionEntry> &, void *);
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static PLDHashOperator ShutdownPassCB(const nsACString &, nsAutoPtr<nsConnectionEntry> &, void *);
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static PLDHashOperator PurgeExcessIdleConnectionsCB(const nsACString &, nsAutoPtr<nsConnectionEntry> &, void *);
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static PLDHashOperator ClosePersistentConnectionsCB(const nsACString &, nsAutoPtr<nsConnectionEntry> &, void *);
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bool ProcessPendingQForEntry(nsConnectionEntry *);
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bool AtActiveConnectionLimit(nsConnectionEntry *, PRUint8 caps);
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void GetConnection(nsConnectionEntry *, nsHttpTransaction *,
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bool, nsHttpConnection **);
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nsresult DispatchTransaction(nsConnectionEntry *, nsAHttpTransaction *,
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PRUint8 caps, nsHttpConnection *);
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bool BuildPipeline(nsConnectionEntry *, nsAHttpTransaction *, nsHttpPipeline **);
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nsresult ProcessNewTransaction(nsHttpTransaction *);
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nsresult EnsureSocketThreadTargetIfOnline();
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void ClosePersistentConnections(nsConnectionEntry *ent);
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nsresult CreateTransport(nsConnectionEntry *, nsHttpTransaction *);
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void AddActiveConn(nsHttpConnection *, nsConnectionEntry *);
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void StartedConnect();
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void RecvdConnect();
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// message handlers have this signature
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typedef void (nsHttpConnectionMgr:: *nsConnEventHandler)(PRInt32, void *);
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// nsConnEvent
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//
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// subclass of nsRunnable used to marshall events to the socket transport
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// thread. this class is used to implement PostEvent.
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//
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class nsConnEvent;
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friend class nsConnEvent;
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class nsConnEvent : public nsRunnable
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{
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public:
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nsConnEvent(nsHttpConnectionMgr *mgr,
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nsConnEventHandler handler,
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PRInt32 iparam,
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void *vparam)
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: mMgr(mgr)
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, mHandler(handler)
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, mIParam(iparam)
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, mVParam(vparam)
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{
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NS_ADDREF(mMgr);
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}
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NS_IMETHOD Run()
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{
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(mMgr->*mHandler)(mIParam, mVParam);
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return NS_OK;
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}
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private:
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virtual ~nsConnEvent()
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{
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NS_RELEASE(mMgr);
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}
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nsHttpConnectionMgr *mMgr;
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nsConnEventHandler mHandler;
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PRInt32 mIParam;
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void *mVParam;
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};
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nsresult PostEvent(nsConnEventHandler handler,
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PRInt32 iparam = 0,
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void *vparam = nsnull);
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// message handlers
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void OnMsgShutdown (PRInt32, void *);
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void OnMsgNewTransaction (PRInt32, void *);
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void OnMsgReschedTransaction (PRInt32, void *);
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void OnMsgCancelTransaction (PRInt32, void *);
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void OnMsgProcessPendingQ (PRInt32, void *);
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void OnMsgPruneDeadConnections (PRInt32, void *);
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void OnMsgReclaimConnection (PRInt32, void *);
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void OnMsgUpdateParam (PRInt32, void *);
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void OnMsgClosePersistentConnections (PRInt32, void *);
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// Total number of active connections in all of the ConnectionEntry objects
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// that are accessed from mCT connection table.
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PRUint16 mNumActiveConns;
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// Total number of idle connections in all of the ConnectionEntry objects
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// that are accessed from mCT connection table.
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PRUint16 mNumIdleConns;
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// Holds time in seconds for next wake-up to prune dead connections.
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PRUint64 mTimeOfNextWakeUp;
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// Timer for next pruning of dead connections.
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nsCOMPtr<nsITimer> mTimer;
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//
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// the connection table
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//
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// this table is indexed by connection key. each entry is a
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// nsConnectionEntry object.
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//
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nsClassHashtable<nsCStringHashKey, nsConnectionEntry> mCT;
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};
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#endif // !nsHttpConnectionMgr_h__
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