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/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

%{C++
#ifdef MOZ_TIMELINE
%}
      
/**
 * nsITimelineService is used to constuct a timeline of program
 * execution.  The timeline is output to a file, either stderr or the
 * value of the environment variable NS_TIMELINE_LOG_FILE.  On the
 * Mac, the timeline is output to the file named "timeline.txt".  The
 * reason it's different on the Mac is that the Mac environment
 * initialization code happens after timeline initialization code.
 * 
 * If NS_TIMELINE_INIT_TIME is set in the environment, that will be
 * used as the time of startup; otherwise the current time when mark()
 * is first called will be used.
 * 
 * mark() is used to put marks on the timeline.
 * 
 * indent() and outdent() are used to format the timeline a bit to
 * show nesting.  This doesn't produce perfect results in the face of
 * asychrony and multiple threads.
 * 
 * enter() and leave() are convenience functions that add marks to the
 * timeline and do indentation.
 * 
 * startTimer() and stopTimer() control named stop watches.  If
 * startTimer() is called more than once, an equal number of
 * stopTimer() calls are needed to actually stop the timer.  This
 * makes these timers slightly useful in a threaded environment.
 * 
 * markTimer() puts a mark on the timeline containing the total for
 * the named timer.
 * 
 * Don't use nsITimelineService in C++ code; use the NS_TIMELINE
 * macros instead.  nsITimelineService exists so that JavaScript code
 * can mark the timeline.
 */
[scriptable, uuid(93276790-3daf-11d5-b67d-000064657374)]
interface nsITimelineService : nsISupports
{
    /**
     * mark()
     * Print "<elapsed time>: <text>\n" in the timeline log file.
     */
    void mark(in string text);

    /**
     * causes subsequent marks to be indented for a more readable
     * report.
     */
    void indent();

    /**
     * Causes subsequent marks to be outdented.
     */
    void outdent();

    /**
     * enter/leave bracket code with "<text>..." and "...<text>" as
     * well as indentation.
     */
    void enter(in string text);
    void leave(in string text);

    void startTimer(in string timerName);

    void stopTimer(in string timerName);

    void markTimer(in string timerName);

    void resetTimer(in string timerName);

    // Mark a timer, plus an additional comment
    void markTimerWithComment(in string timerName, in string comment);
};

%{C++
#endif /* MOZ_TIMELINE */
%}


%{C++

#ifdef MOZ_TIMELINE

/*
 * These are equivalent to the corresponding nsITimelineService
 * methods, and can be called before XPCOM is initialized.
 */
extern "C" NS_COM nsresult NS_TimelineMark(const char *text, ...);
extern "C" NS_COM nsresult NS_TimelineForceMark(const char *text, ...);
extern "C" NS_COM nsresult NS_TimelineStartTimer(const char *timerName);
extern "C" NS_COM nsresult NS_TimelineStopTimer(const char *timerName);
extern "C" NS_COM nsresult NS_TimelineResetTimer(const char *timerName);
extern "C" NS_COM nsresult NS_TimelineMarkTimer(const char *timerName, const char *str=nsnull);
extern "C" NS_COM nsresult NS_TimelineIndent();
extern "C" NS_COM nsresult NS_TimelineOutdent();
extern "C" NS_COM nsresult NS_TimelineEnter(const char *text);
extern "C" NS_COM nsresult NS_TimelineLeave(const char *text);

/*
 * Use these macros for the above calls so we can easily compile them
 * out.
 */
#define NS_TIMELINE_MARK(text) NS_TimelineMark(text)
#define NS_TIMELINE_MARKV(args) NS_TimelineMark args
#define NS_TIMELINE_INDENT() NS_TimelineIndent()
#define NS_TIMELINE_OUTDENT() NS_TimelineOutdent()
#define NS_TIMELINE_ENTER(text) NS_TimelineEnter(text)
#define NS_TIMELINE_LEAVE(text) NS_TimelineLeave(text)
#define NS_TIMELINE_START_TIMER(timerName) NS_TimelineStartTimer(timerName)
#define NS_TIMELINE_STOP_TIMER(timerName) NS_TimelineStopTimer(timerName)
#define NS_TIMELINE_MARK_TIMER(timerName) NS_TimelineMarkTimer(timerName)
#define NS_TIMELINE_RESET_TIMER(timerName) NS_TimelineResetTimer(timerName)
#define NS_TIMELINE_MARK_TIMER1(timerName, str) NS_TimelineMarkTimer(timerName, str)

/*
 * Helper class to time functions. Use only static strings.
 */
class nsFunctionTimer {
public:
    const char *mTimer;
    PRBool mMark;
    const char *mMarkStr;
    nsFunctionTimer(const char *timer, PRBool mark = PR_TRUE, const char *markStr = nsnull)
        : mTimer(timer), mMark(mark), mMarkStr(markStr)
    {
        NS_TIMELINE_START_TIMER(mTimer);
    }

    ~nsFunctionTimer()
    {
        NS_TIMELINE_STOP_TIMER(mTimer);
        if (mMark)
            if (mMarkStr)
                NS_TIMELINE_MARK_TIMER1(mTimer, mMarkStr);
            else
                NS_TIMELINE_MARK_TIMER(mTimer);
    }
};

/*
 * NS_TIMELINE_MARK_ macros for various data types.  Each of these
 * macros replaces "%s" in its "text" argument with a string
 * representation of its last argument.
 * 
 * Please feel free to add more NS_TIMELINE_MARK_ macros for
 * various data types so that code using NS_TIMELINE is uncluttered.
 * Don't forget the empty versions in the #else section below for
 * non-timeline builds.
 */
#define NS_TIMELINE_MARK_URI(text, uri) \
    { \
        nsCAutoString spec; \
        if (uri) { \
            uri->GetSpec(spec); \
        } \
        if (!spec.IsEmpty()) { \
            NS_TimelineMark(text, spec.get()); \
        } else { \
            NS_TimelineMark(text, "??"); \
        } \
    }

#define NS_TIMELINE_MARK_CHANNEL(text, channel) \
    { \
        nsCOMPtr<nsIURI> uri; \
        if (channel) { \
            channel->GetURI(getter_AddRefs(uri)); \
        } \
        NS_TIMELINE_MARK_URI(text, uri); \
    }

#define NS_TIMELINE_MARK_LOADER(text, loader) \
    { \
        nsCOMPtr<nsIRequest> request; \
        loader->GetRequest(getter_AddRefs(request)); \
        nsCOMPtr<nsIChannel> channel(do_QueryInterface(request)); \
        NS_TIMELINE_MARK_CHANNEL(text, channel); \
    }
#define NS_TIMELINE_MARK_FUNCTION(timer) nsFunctionTimer functionTimer(timer)
#define NS_TIMELINE_MARK_FUNCTION1(timer, str) nsFunctionTimer functionTimer(timer, PR_TRUE, str)
#define NS_TIMELINE_TIME_FUNCTION(timer) nsFunctionTimer functionTimer(timer, PR_FALSE) /* no mark, only time */

#else /* !defined(MOZ_TIMELINE) */
#define NS_TIMELINE_MARK(text)
#define NS_TIMELINE_MARKV(args)
#define NS_TIMELINE_INDENT()
#define NS_TIMELINE_OUTDENT()
#define NS_TIMELINE_START_TIMER(timerName)
#define NS_TIMELINE_STOP_TIMER(timerName)
#define NS_TIMELINE_MARK_TIMER(timerName)
#define NS_TIMELINE_RESET_TIMER(timerName)
#define NS_TIMELINE_MARK_TIMER1(timerName, str)
#define NS_TIMELINE_ENTER(text)
#define NS_TIMELINE_LEAVE(text)
#define NS_TIMELINE_MARK_URI(text, uri)
#define NS_TIMELINE_MARK_FUNCTION(timer)
#define NS_TIMELINE_TIME_FUNCTION(timer)
#define NS_TIMELINE_MARK_CHANNEL(text, channel)
#define NS_TIMELINE_MARK_LOADER(text, loader);
#endif /* defined(MOZ_TIMELINE) */ 
%}