author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 23 Jun 2010 18:12:48 +0300 | |
changeset 48 | d0b4e67b3a60 |
parent 23 | 74c9f037fd5d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Logging macros |
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* |
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*/ |
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#ifndef GLXTRACER_H |
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#define GLXTRACER_H |
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/** |
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* This file has been copied from the forum nokia wiki and renamed to glxtracer.h |
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* http://wiki.forum.nokia.com/index.php/Trace_Function_Enter%2C_Exit_and_Leave |
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*/ |
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#include <e32base.h> |
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// Define tracer logging method |
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// 0 = Logging off |
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// 1 = Log to RDebug |
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// 2 = Log to file (RFileLogger) |
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#define TRACER_LOG_METHOD 0 |
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// ============================================================================ |
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// Logging off, define empty macros and skip all the rest |
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#if TRACER_LOG_METHOD == 0 |
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#define TRACER(func) |
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#define TRACER_RET(func,format) |
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#else // Logging on |
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// Macro to print function entry, exit and leave. |
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// Example: TRACER("CMyClass::MyFunction"); |
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#define TRACER(func) TTracer function_tracer( _S(func), _S("") ); |
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// Macro to print function return value in addition to entry, exit |
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// and leave conditions Second parameter is a formatting string used |
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// to print the return value Example to print an integer return value: |
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// TRACER_RET("CMyclass::MyFunction", "%d"); |
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#define TRACER_RET(func,format) TTracer func_tracer( _S(func), _S(format) ); |
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#if TRACER_LOG_METHOD == 1 // Print to RDebug |
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#include <e32debug.h> |
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#define TRACER_PRINT(a) RDebug::Print(a,&iFunc); |
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#define TRACER_PRINT_RET(a,b) RDebug::Print(a,&iFunc,b); |
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#elif TRACER_LOG_METHOD == 2 // Print to file |
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#include <flogger.h> |
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_LIT( KLogDir, "tracer" ); // Log directory: C:\logs\tracer |
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_LIT( KLogFile, "tracer.txt" ); // Log file: c:\logs\tracer\tracer.txt |
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#define TRACER_PRINT(a) RFileLogger::WriteFormat(KLogDir, \ |
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KLogFile,EFileLoggingModeAppend,a,&iFunc); |
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#define TRACER_PRINT_RET(a,b) RFileLogger::WriteFormat(KLogDir, \ |
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KLogFile,EFileLoggingModeAppend,a,&iFunc,b); |
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#endif |
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_LIT( KLogEnter, "%S: ENTER" ); |
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_LIT( KLogExit, "%S: EXIT" ); |
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_LIT( KLogLeave, "%S: LEAVE!" ); |
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_LIT( KLogExitRet, "%S: EXIT, Returning " ); |
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/** |
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* Simple tracer class that logs function enter, exit or leave |
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*/ |
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class TTracer |
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{ |
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public: |
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/** |
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* inline constructor to write log of entering a function |
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*/ |
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TTracer( const TText* aFunc, const TText* aRetFormat ) |
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: iFunc( aFunc ) |
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, iRetFormat( aRetFormat ) |
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{ |
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TRACER_PRINT( KLogEnter ); |
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} |
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/** |
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* inline destructor to write log of exiting a function |
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* normally or with a leave |
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*/ |
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~TTracer() |
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{ |
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if ( std::uncaught_exception() ) // Leave is an exception |
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103 |
{ |
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// The function exited with a leave |
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TRACER_PRINT( KLogLeave ); |
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} |
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else |
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108 |
{ |
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// The function exited normally |
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if ( iRetFormat.Length() == 0 ) |
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111 |
{ |
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TRACER_PRINT( KLogExit ); |
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} |
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else |
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115 |
{ |
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// Log the return value |
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#ifdef __WINS__ |
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TInt32 retVal = 0; |
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119 |
|
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// The assembly bit. This needs to be reimplemented |
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// for every target. |
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_asm( mov retVal, ebx ); |
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123 |
|
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TBuf<100> format( KLogExitRet ); |
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format.Append( iRetFormat ); |
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TRACER_PRINT_RET( format, retVal ); |
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#else |
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TRACER_PRINT( KLogExit ); |
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#endif |
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} |
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} |
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} |
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133 |
|
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private: |
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135 |
|
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/** |
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* Pointer descriptor to function signature that is to be logged. |
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*/ |
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TPtrC iFunc; |
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|
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/** |
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* Formatting string used to print the function return value |
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*/ |
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TPtrC iRetFormat; |
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|
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}; |
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|
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#endif // TRACER_LOG_METHOD == 0 |
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|
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#endif // GLXTRACER_H |