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50
51 #ifndef TRACE_H
52 #define TRACE_H
53
54 #include <QtCore/QDebug>
55
56 #define ENABLE_TRACE
57 //#define VERBOSE_TRACE
58
59 namespace Trace {
60
61 class NullDebug
62 {
63 public:
64 template <typename T>
65 NullDebug& operator<<(const T&) { return *this; }
66 };
67
nullDebug()68 inline NullDebug nullDebug() { return NullDebug(); }
69
70 template <typename T>
71 struct PtrWrapper
72 {
PtrWrapperPtrWrapper73 PtrWrapper(const T *ptr) : m_ptr(ptr) { }
74 const T *const m_ptr;
75 };
76
77 } // namespace Trace
78
79 template <typename T>
80 inline QDebug& operator<<(QDebug &debug, const Trace::PtrWrapper<T> &wrapper)
81 {
82 QDebugStateSaver saver(debug);
83 debug.nospace() << '[' << static_cast<const void *>(wrapper.m_ptr) << ']';
84 return debug;
85 }
86
87 template<typename T>
qtVoidPtr(const T * ptr)88 inline const void *qtVoidPtr(const T *ptr)
89 { return static_cast<const void *>(ptr); }
90
91 #define qtThisPtr() qtVoidPtr(this)
92
93 #ifdef ENABLE_TRACE
qtTrace()94 inline QDebug qtTrace() { return qDebug() << "[qmlvideo]"; }
95 # ifdef VERBOSE_TRACE
qtVerboseTrace()96 inline QDebug qtVerboseTrace() { return qtTrace(); }
97 # else
qtVerboseTrace()98 inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); }
99 # endif
100 #else
qtTrace()101 inline Trace::NullDebug qtTrace() { return Trace::nullDebug(); }
qtVerboseTrace()102 inline Trace::NullDebug qtVerboseTrace() { return Trace::nullDebug(); }
103 #endif
104
105 #endif // TRACE_H
106