///////////////////////////////////////////////////////////////////////////// // Name: memory.h // Purpose: interface of wxDebugContext // Author: wxWidgets team // RCS-ID: $Id$ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// /** @class wxDebugContext A class for performing various debugging and memory tracing operations. Full functionality (such as printing out objects currently allocated) is only present in a debugging build of wxWidgets, i.e. if the __WXDEBUG__ symbol is defined. wxDebugContext and related functions and macros can be compiled out by setting wxUSE_DEBUG_CONTEXT to 0 is setup.h @library{wxbase} @category{debugging} @see @ref overview_debugging */ class wxDebugContext { public: /** Checks the memory blocks for errors, starting from the currently set checkpoint. @return Returns the number of errors, so a value of zero represents success. Returns -1 if an error was detected that prevents further checking. */ int Check(); /** Performs a memory dump from the currently set checkpoint, writing to the current debug stream. Calls the @b Dump member function for each wxObject derived instance. @return @true if the function succeeded, @false otherwise. */ static bool Dump(); /** Returns @true if the memory allocator checks all previous memory blocks for errors. By default, this is @false since it slows down execution considerably. @see SetCheckPrevious() */ static bool GetCheckPrevious(); /** Returns @true if debug mode is on. If debug mode is on, the wxObject new and delete operators store or use information about memory allocation. Otherwise, a straight malloc and free will be performed by these operators. @see SetDebugMode() */ static bool GetDebugMode(); /** Gets the debug level (default 1). The debug level is used by the wxTraceLevel function and the WXTRACELEVEL macro to specify how detailed the trace information is; setting a different level will only have an effect if trace statements in the application specify a value other than one. @deprecated This is obsolete, replaced by wxLog functionality. @see SetLevel() */ static int GetLevel(); /** Returns the output stream associated with the debug context. @deprecated This is obsolete, replaced by wxLog functionality. @see SetStream() */ ostream GetStream(); /** Returns a pointer to the output stream buffer associated with the debug context. There may not necessarily be a stream buffer if the stream has been set by the user. @deprecated This is obsolete, replaced by wxLog functionality. */ streambuf* GetStreamBuf(); /** Returns @true if there is a stream currently associated with the debug context. @deprecated This is obsolete, replaced by wxLog functionality. @see SetStream(), GetStream() */ bool HasStream(); /** Prints a list of the classes declared in this application, giving derivation and whether instances of this class can be dynamically created. @see PrintStatistics() */ static bool PrintClasses(); /** Performs a statistics analysis from the currently set checkpoint, writing to the current debug stream. The number of object and non-object allocations is printed, together with the total size. @param detailed If @true, the function will also print how many objects of each class have been allocated, and the space taken by these class instances. @see PrintStatistics() */ static bool PrintStatistics(bool detailed = true); /** Tells the memory allocator to check all previous memory blocks for errors. By default, this is @false since it slows down execution considerably. @see GetCheckPrevious() */ static void SetCheckPrevious(bool check); /** Sets the current checkpoint: Dump and PrintStatistics operations will be performed from this point on. This allows you to ignore allocations that have been performed up to this point. @param all If @true, the checkpoint is reset to include all memory allocations since the program started. */ static void SetCheckpoint(bool all = false); /** Sets the debug mode on or off. If debug mode is on, the wxObject new and delete operators store or use information about memory allocation. Otherwise, a straight malloc and free will be performed by these operators. By default, debug mode is on if __WXDEBUG__ is defined. If the application uses this function, it should make sure that all object memory allocated is deallocated with the same value of debug mode. Otherwise, the delete operator might try to look for memory information that does not exist. @see GetDebugMode() */ static void SetDebugMode(bool debug); /** Sets the current debug file and creates a stream. This will delete any existing stream and stream buffer. By default, the debug context stream outputs to the debugger (Windows) or standard error (other platforms). */ bool SetFile(const wxString& filename); /** Sets the debug level (default 1). The debug level is used by the wxTraceLevel function and the WXTRACELEVEL macro to specify how detailed the trace information is; setting a different level will only have an effect if trace statements in the application specify a value other than one. @deprecated This is obsolete, replaced by wxLog functionality. @see GetLevel() */ static void SetLevel(int level); /** Installs a function to be called at the end of wxWidgets shutdown. It will be called after all files with global instances of wxDebugContextDumpDelayCounter have run their destructors. The shutdown function must be take no parameters and return nothing. */ static void SetShutdownNotifyFunction(wxShutdownNotifyFunction func); /** Sets the debugging stream to be the debugger (Windows) or standard error (other platforms). This is the default setting. The existing stream will be flushed and deleted. @deprecated This is obsolete, replaced by wxLog functionality. */ bool SetStandardError(); /** Sets the stream and optionally, stream buffer associated with the debug context. This operation flushes and deletes the existing stream (and stream buffer if any). @deprecated This is obsolete, replaced by wxLog functionality. @param stream Stream to associate with the debug context. Do not set this to @NULL. @param streamBuf Stream buffer to associate with the debug context. */ void SetStream(ostream* stream, streambuf* streamBuf = NULL); }; // ============================================================================ // Global functions/macros // ============================================================================ /** @ingroup group_funcmacro_log */ //@{ /** @deprecated Use one of the wxLogTrace() functions or one of the wxVLogTrace() functions instead. Calls wxTrace() with printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). @header{wx/memory.h} */ #define WXTRACE(format, ...) /** @deprecated Use one of the wxLogTrace() functions or one of the wxVLogTrace() functions instead. Calls wxTraceLevel with printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). The first argument should be the level at which this information is appropriate. It will only be output if the level returned by wxDebugContext::GetLevel is equal to or greater than this value. @header{wx/memory.h} */ #define WXTRACELEVEL(level, format, ...) /** @deprecated Use one of the wxLogTrace() functions or one of the wxVLogTrace() functions instead. Takes printf-style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). @header{wx/memory.h} */ void wxTrace(const wxString& format, ...); /** @deprecated Use one of the wxLogTrace() functions or one of the wxVLogTrace() functions instead. Takes @e printf() style variable argument syntax. Output is directed to the current output stream (see wxDebugContext). The first argument should be the level at which this information is appropriate. It will only be output if the level returned by wxDebugContext::GetLevel() is equal to or greater than this value. @header{wx/memory.h} */ void wxTraceLevel(int level, const wxString& format, ...); //@}