1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the Qt Mobility Components. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL21$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** $QT_END_LICENSE$ 31 ** 32 ****************************************************************************/ 33 34 #ifndef TRACE_H 35 #define TRACE_H 36 37 #include <QDebug> 38 39 #define ENABLE_TRACE 40 //#define VERBOSE_TRACE 41 42 namespace Trace { 43 44 class NullDebug 45 { 46 public: 47 template <typename T> 48 NullDebug &operator<<(const T &) { return *this; } 49 }; 50 nullDebug()51inline NullDebug nullDebug() { return NullDebug(); } 52 53 template <typename T> 54 struct PtrWrapper 55 { PtrWrapperPtrWrapper56 PtrWrapper(const T *ptr) : m_ptr(ptr) { } 57 const T *const m_ptr; 58 }; 59 60 } // namespace Trace 61 62 template <typename T> 63 inline QDebug &operator<<(QDebug &debug, const Trace::PtrWrapper<T> &wrapper) 64 { 65 QDebugStateSaver saver(debug); 66 debug.nospace() << '[' << static_cast<const void *>(wrapper.m_ptr) << ']'; 67 return debug; 68 } 69 70 #ifdef ENABLE_TRACE qtTrace()71 inline QDebug qtTrace() { return qDebug() << "[qmlvideofx]"; } 72 # ifdef VERBOSE_TRACE qtVerboseTrace()73 inline QDebug qtVerboseTrace() { return qtTrace(); } 74 # else qtVerboseTrace()75 inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); } 76 # endif 77 #else qtTrace()78 inline Trace::NullDebug qtTrace() { return Trace::nullDebug(); } qtVerboseTrace()79 inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); } 80 #endif 81 82 #endif // TRACE_H 83 84