X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9e3d3318dc6f58870d13eb6567da721d060533a6..aba4387c4c71fb812c6a07a7abb495606c5ef4af:/include/wx/debug.h diff --git a/include/wx/debug.h b/include/wx/debug.h index 99d01d268a..9010e74c63 100644 --- a/include/wx/debug.h +++ b/include/wx/debug.h @@ -1,12 +1,12 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: debug.h +// Name: wx/debug.h // Purpose: Misc debug functions and macros // Author: Vadim Zeitlin // Modified by: // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin -// Licence: wxWindows license +// Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// #ifndef _WX_DEBUG_H_ @@ -16,109 +16,119 @@ #include "wx/wxchar.h" -#ifndef __TFILE__ -#define __XFILE__(x) _T(x) -#define __TFILE__ __XFILE__(__FILE__) -#endif - // ---------------------------------------------------------------------------- -/** - @name Debugging macros - - All debugging macros rely on ASSERT() which in turn calls user-defined - OnAssert() function. To keep things simple, it's called even when the - expression is TRUE (i.e. everything is ok) and by default does nothing: just - returns the same value back. But if you redefine it to do something more sexy - (popping up a message box in your favourite GUI, sending you e-mail or - whatever) it will affect all ASSERTs, FAILs and CHECKs in your code. -
-
- Warning: if you don't like advices on programming style, don't read - further! ;-) -
-
- Extensive use of these macros is recommended! Remember that ASSERTs are - disabled in final (without __WXDEBUG__ defined) build, so they add strictly - nothing to your program's code. On the other hand, CHECK macros do stay - even in release builds, but in general are not much of a burden, while - a judicious use of them might increase your program's stability. - - @memo Debugging macros (replacement for standard assert()) and more. - */ +// Debugging macros +// +// All debugging macros rely on ASSERT() which in turn calls user-defined +// OnAssert() function. To keep things simple, it's called even when the +// expression is TRUE (i.e. everything is ok) and by default does nothing: just +// returns the same value back. But if you redefine it to do something more sexy +// (popping up a message box in your favourite GUI, sending you e-mail or +// whatever) it will affect all ASSERTs, FAILs and CHECKs in your code. +// +// Warning: if you don't like advices on programming style, don't read +// further! ;-) +// +// Extensive use of these macros is recommended! Remember that ASSERTs are +// disabled in final (without __WXDEBUG__ defined) build, so they add strictly +// nothing to your program's code. On the other hand, CHECK macros do stay +// even in release builds, but in general are not much of a burden, while +// a judicious use of them might increase your program's stability. // ---------------------------------------------------------------------------- -//@{ -/** @name Macros which are completely disabled in 'release' mode */ -//@{ +// Use of these suppresses compiler warnings about testing constant expression +WXDLLEXPORT_DATA(extern const bool) wxTrue; +WXDLLEXPORT_DATA(extern const bool) wxFalse; + +// Macros which are completely disabled in 'release' mode +// +// NB: these functions are implemented in src/common/appcmn.cpp #ifdef __WXDEBUG__ - /** - this function may be redefined to do something non trivial and is called - whenever one of debugging macros fails (i.e. condition is false in an - assertion) - @param szFile and nLine - file name and line number of the ASSERT - szMsg - optional message explaining the reason + /* + this function may be redefined to do something non trivial and is called + whenever one of debugging macros fails (i.e. condition is false in an + assertion) + + parameters: + szFile and nLine - file name and line number of the ASSERT + szMsg - optional message explaining the reason */ - void WXDLLEXPORT wxOnAssert(const wxChar *szFile, int nLine, const wxChar *szMsg = (const wxChar *) NULL); + extern void WXDLLEXPORT wxOnAssert(const wxChar *szFile, + int nLine, + const wxChar *szMsg = NULL); - /// generic assert macro - #define wxASSERT(cond) if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__) + // call this function to break into the debugger uncodnitionally (assuming + // the program is running under debugger, of course) + extern void WXDLLEXPORT wxTrap(); -#if 0 // defined(__BORLANDC__) && defined(__WIN16__) - // Too much text, so make wxASSERT_MSG the same as wxASSERT, - // thus removing the text from the program. - #define wxASSERT_MSG(x, m) if ( !(x) ) wxOnAssert(__TFILE__, __LINE__) -#else - /// assert with additional message explaining it's cause - #define wxASSERT_MSG(x, m) if ( !(x) ) wxOnAssert(__TFILE__, __LINE__, m) -#endif + /* + notice the usage of else at the end of wxASSERT macro: this ensures that + the following code + + if ( ... ) + wxASSERT(...); + else + ... + + works like expected: if there were no "else", the one in the code above + would be matched with a wrong "if" + */ + + // generic assert macro + #define wxASSERT(cond) if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__); else + + // assert with additional message explaining it's cause + #define wxASSERT_MSG(cond, msg) \ + if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__, msg); else + // an assert helper used to avoid warning when testing constant expressions, + // i.e. wxASSERT( sizeof(int) == 4 ) can generate a compiler warning about + // expression being always true, but not using + // wxASSERT( wxAssertIsEqual(sizeof(int), 4) ) + extern bool WXDLLEXPORT wxAssertIsEqual(int x, int y); #else + #define wxTrap() + // nothing to do in release modes (hopefully at this moment there are // no more bugs ;-) - #define wxASSERT(cond) - #define wxASSERT_MSG(x, m) + #define wxASSERT(cond) + #define wxASSERT_MSG(x, m) #endif //__WXDEBUG__ - /// special form of assert: always triggers it (in debug mode) -#define wxFAIL wxASSERT(wxFalse) +// special form of assert: always triggers it (in debug mode) +#define wxFAIL wxASSERT(wxFalse) -#if 0 // defined(__BORLANDC__) && defined(__WIN16__) - // Too much text, so make wxFAIL_MSG the same as wxFAIL, - // thus removing the text from the program. -#define wxFAIL_MSG(msg) wxASSERT(wxFalse) -#else - /// FAIL with some message -#define wxFAIL_MSG(msg) wxASSERT_MSG(wxFalse, msg) -#endif -//@} +// FAIL with some message +#define wxFAIL_MSG(msg) wxASSERT_MSG(wxFalse, msg) -// NB: these macros work also in release mode! +// NB: the following macros work also in release mode! -/** +/* These macros must be used only in invalid situation: for example, an invalid parameter (NULL pointer) is passed to a function. Instead of dereferencing it and causing core dump the function might try using CHECK( p != NULL ) or CHECK( p != NULL, return LogError("p is NULL!!") ) - - @name Macros which remain even in 'release' mode */ -//@{ - /// check that expression is true, "return" if not (also FAILs in debug mode) -#define wxCHECK(x, rc) if (!(x)) {wxFAIL; return rc; } - /// as wxCHECK but with a message explaining why we fail -#define wxCHECK_MSG(x, rc, msg) if (!(x)) {wxFAIL_MSG(msg); return rc; } - /// check that expression is true, perform op if not -#define wxCHECK2(x, op) if (!(x)) {wxFAIL; op; } - /// as wxCHECK2 but with a message explaining why we fail -#define wxCHECK2_MSG(x, op, msg) if (!(x)) {wxFAIL_MSG(msg); op; } - /// special form of wxCHECK2: as wxCHECK, but for use in void functions - // NB: there is only one form (with msg parameter) and it's intentional: - // there is no other way to tell the caller what exactly went wrong - // from the void function (of course, the function shouldn't be void - // to begin with...) -#define wxCHECK_RET(x, msg) if (!(x)) {wxFAIL_MSG(msg); return; } -//@} - -//@} + +// check that expression is true, "return" if not (also FAILs in debug mode) +#define wxCHECK(x, rc) if (!(x)) {wxFAIL; return rc; } + +// as wxCHECK but with a message explaining why we fail +#define wxCHECK_MSG(x, rc, msg) if (!(x)) {wxFAIL_MSG(msg); return rc; } + +// check that expression is true, perform op if not +#define wxCHECK2(x, op) if (!(x)) {wxFAIL; op; } + +// as wxCHECK2 but with a message explaining why we fail +#define wxCHECK2_MSG(x, op, msg) if (!(x)) {wxFAIL_MSG(msg); op; } + +// special form of wxCHECK2: as wxCHECK, but for use in void functions +// +// NB: there is only one form (with msg parameter) and it's intentional: +// there is no other way to tell the caller what exactly went wrong +// from the void function (of course, the function shouldn't be void +// to begin with...) +#define wxCHECK_RET(x, msg) if (!(x)) {wxFAIL_MSG(msg); return; } #endif // _WX_DEBUG_H_ +