зеркало из https://github.com/mozilla/pjs.git
176 строки
5.5 KiB
C++
176 строки
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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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.org code.
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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) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 nsTimerImpl_h___
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#define nsTimerImpl_h___
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//#define FORCE_PR_LOG /* Allow logging in the release build */
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#include "nsITimer.h"
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#include "nsIEventTarget.h"
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#include "nsIObserver.h"
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#include "nsCOMPtr.h"
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#include "prlog.h"
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#include "mozilla/TimeStamp.h"
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#if defined(PR_LOGGING)
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static PRLogModuleInfo *gTimerLog = PR_NewLogModule("nsTimerImpl");
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#define DEBUG_TIMERS 1
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#else
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#undef DEBUG_TIMERS
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#endif
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#define NS_TIMER_CLASSNAME "Timer"
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#define NS_TIMER_CID \
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{ /* 5ff24248-1dd2-11b2-8427-fbab44f29bc8 */ \
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0x5ff24248, \
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0x1dd2, \
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0x11b2, \
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{0x84, 0x27, 0xfb, 0xab, 0x44, 0xf2, 0x9b, 0xc8} \
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}
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enum {
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CALLBACK_TYPE_UNKNOWN = 0,
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CALLBACK_TYPE_INTERFACE = 1,
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CALLBACK_TYPE_FUNC = 2,
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CALLBACK_TYPE_OBSERVER = 3
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};
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class nsTimerImpl : public nsITimer
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{
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public:
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typedef mozilla::TimeStamp TimeStamp;
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nsTimerImpl();
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static NS_HIDDEN_(nsresult) Startup();
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static NS_HIDDEN_(void) Shutdown();
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friend class TimerThread;
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void Fire();
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nsresult PostTimerEvent();
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void SetDelayInternal(PRUint32 aDelay);
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NS_DECL_ISUPPORTS
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NS_DECL_NSITIMER
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PRInt32 GetGeneration() { return mGeneration; }
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private:
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~nsTimerImpl();
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nsresult InitCommon(PRUint32 aType, PRUint32 aDelay);
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void ReleaseCallback()
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{
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// if we're the last owner of the callback object, make
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// sure that we don't recurse into ReleaseCallback in case
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// the callback's destructor calls Cancel() or similar.
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PRUint8 cbType = mCallbackType;
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mCallbackType = CALLBACK_TYPE_UNKNOWN;
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if (cbType == CALLBACK_TYPE_INTERFACE)
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NS_RELEASE(mCallback.i);
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else if (cbType == CALLBACK_TYPE_OBSERVER)
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NS_RELEASE(mCallback.o);
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}
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bool IsRepeating() const {
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PR_STATIC_ASSERT(TYPE_ONE_SHOT < TYPE_REPEATING_SLACK);
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PR_STATIC_ASSERT(TYPE_REPEATING_SLACK < TYPE_REPEATING_PRECISE);
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PR_STATIC_ASSERT(TYPE_REPEATING_PRECISE < TYPE_REPEATING_PRECISE_CAN_SKIP);
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return mType >= TYPE_REPEATING_SLACK;
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}
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bool IsRepeatingPrecisely() const {
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return mType >= TYPE_REPEATING_PRECISE;
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}
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nsCOMPtr<nsIEventTarget> mEventTarget;
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void * mClosure;
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union CallbackUnion {
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nsTimerCallbackFunc c;
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nsITimerCallback * i;
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nsIObserver * o;
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} mCallback;
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// Some callers expect to be able to access the callback while the
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// timer is firing.
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nsCOMPtr<nsITimerCallback> mTimerCallbackWhileFiring;
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// These members are set by Init (called from NS_NewTimer) and never reset.
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PRUint8 mCallbackType;
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// These members are set by the initiating thread, when the timer's type is
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// changed and during the period where it fires on that thread.
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PRUint8 mType;
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bool mFiring;
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// Use a bool (int) here to isolate loads and stores of these two members
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// done on various threads under the protection of TimerThread::mLock, from
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// loads and stores done on the initiating/type-changing/timer-firing thread
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// to the above PRUint8/bool members.
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bool mArmed;
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bool mCanceled;
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// The generation number of this timer, re-generated each time the timer is
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// initialized so one-shot timers can be canceled and re-initialized by the
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// arming thread without any bad race conditions.
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PRInt32 mGeneration;
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PRUint32 mDelay;
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TimeStamp mTimeout;
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#ifdef DEBUG_TIMERS
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TimeStamp mStart, mStart2;
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static double sDeltaSum;
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static double sDeltaSumSquared;
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static double sDeltaNum;
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#endif
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};
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#endif /* nsTimerImpl_h___ */
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