X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/749b01f03755465790549e7b94d2a6e2eaae193e..d8f2f99ff72b7aa656765799936f0a1038cf3a8b:/include/wx/debug.h diff --git a/include/wx/debug.h b/include/wx/debug.h index 82785eca9b..fc12f49f25 100644 --- a/include/wx/debug.h +++ b/include/wx/debug.h @@ -1,132 +1,305 @@ -///////////////////////////////////////////////////////////////////////////// -// 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 -///////////////////////////////////////////////////////////////////////////// +/** +* Name: wx/debug.h +* Purpose: Misc debug functions and macros +* Author: Vadim Zeitlin +* Modified by: Ryan Norton (Converted to C) +* Created: 29/01/98 +* RCS-ID: $Id$ +* Copyright: (c) 1998 Vadim Zeitlin +* Licence: wxWindows licence +*/ + +/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */ #ifndef _WX_DEBUG_H_ #define _WX_DEBUG_H_ +#ifndef __WXWINCE__ #include +#endif +#include /* for CHAR_BIT used below */ + +#include "wx/wxchar.h" /* for __TFILE__ and wxChar */ + +/* ---------------------------------------------------------------------------- */ +/* Defines controlling the debugging macros */ +/* ---------------------------------------------------------------------------- */ + +/* if _DEBUG is defined (MS VC++ and others use it in debug builds), define */ +/* __WXDEBUG__ too */ +#ifdef _DEBUG + #ifndef __WXDEBUG__ + #define __WXDEBUG__ + #endif /* !__WXDEBUG__ */ +#endif /* _DEBUG */ + +/* if NDEBUG is defined ( uses it), undef __WXDEBUG__ and WXDEBUG */ +#ifdef NDEBUG + #undef __WXDEBUG__ + #undef WXDEBUG +#endif /* NDEBUG */ + +/* if __WXDEBUG__ is defined, make sure that WXDEBUG is defined and >= 1 */ +#ifdef __WXDEBUG__ + #if !defined(WXDEBUG) || !WXDEBUG + #undef WXDEBUG + #define WXDEBUG 1 + #endif /* !WXDEBUG */ +#endif /* __WXDEBUG__ */ + +#ifndef __WXFUNCTION__ + /* TODO: add more compilers supporting __FUNCTION__ */ + #if defined(__DMC__) + /* + __FUNCTION__ happens to be not defined within class members + http://www.digitalmars.com/drn-bin/wwwnews?c%2B%2B.beta/485 + */ + #define __WXFUNCTION__ (NULL) + #elif defined(__GNUC__) || \ + (defined(_MSC_VER) && _MSC_VER >= 1300) || \ + defined(__FUNCTION__) + #define __WXFUNCTION__ __FUNCTION__ + #else + /* still define __WXFUNCTION__ to avoid #ifdefs elsewhere */ + #define __WXFUNCTION__ (NULL) + #endif +#endif /* __WXFUNCTION__ already defined */ + +/* ---------------------------------------------------------------------------- */ +/* Debugging macros */ +/* */ +/* All debugging macros rely on ASSERT() which in turn calls the 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 advice on programming style, don't read */ +/* further! ;-) */ +/* */ +/* Extensive use of these macros is recommended! Remember that ASSERTs are */ +/* disabled in final build (without __WXDEBUG__ defined), 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. */ +/* ---------------------------------------------------------------------------- */ -#include "wx/wxchar.h" - -// ---------------------------------------------------------------------------- -// 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. -// ---------------------------------------------------------------------------- - -// 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 -#ifdef __WXDEBUG__ +/* Macros which are completely disabled in 'release' mode */ +/* */ +/* NB: these functions are implemented in src/common/appcmn.cpp */ +#if defined(__cplusplus) && defined(__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) + This function is called whenever one of debugging macros fails (i.e. + condition is false in an assertion). To customize its behaviour, override + wxApp::OnAssert(). - parameters: + Parameters: szFile and nLine - file name and line number of the ASSERT + szFunc - function name of the ASSERT, may be NULL (NB: ASCII) + szCond - text form of the condition which failed szMsg - optional message explaining the reason */ - extern void WXDLLEXPORT wxOnAssert(const wxChar *szFile, - int nLine, - const wxChar *szMsg = NULL); + extern void WXDLLIMPEXP_BASE wxOnAssert(const wxChar *szFile, + int nLine, + const char *szFunc, + const wxChar *szCond, + const wxChar *szMsg = NULL); - // call this function to break into the debugger uncodnitionally (assuming - // the program is running under debugger, of course) - extern void WXDLLEXPORT wxTrap(); + /* call this function to break into the debugger unconditionally (assuming */ + /* the program is running under debugger, of course) */ + extern void WXDLLIMPEXP_BASE wxTrap(); - /* - notice the usage of else at the end of wxASSERT macro: this ensures that - the following code + /* generic assert macro */ + #define wxASSERT(cond) wxASSERT_MSG(cond, NULL) - if ( ... ) - wxASSERT(...); - else - ... - works like expected: if there were no "else", the one in the code above - would be matched with a wrong "if" - */ + /* assert with additional message explaining its cause */ + + /* compilers can give a warning (such as "possible unwanted ;") when using */ + /* the default definition of wxASSERT_MSG so we provide an alternative */ + #if defined(__MWERKS__) + #define wxASSERT_MSG(cond, msg) \ + if ( cond ) \ + {} \ + else \ + wxOnAssert(__TFILE__, __LINE__, __WXFUNCTION__, _T(#cond), msg) + #else + #define wxASSERT_MSG(cond, msg) \ + if ( cond ) \ + ; \ + else \ + wxOnAssert(__TFILE__, __LINE__, __WXFUNCTION__, _T(#cond), msg) + #endif + + /* special form of assert: always triggers it (in debug mode) */ + #define wxFAIL wxFAIL_MSG(NULL) - // generic assert macro - #define wxASSERT(cond) if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__); else + /* FAIL with some message */ + #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("wxAssertFailure", msg) - // assert with additional message explaining it's cause - #define wxASSERT_MSG(cond, msg) \ - if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__, msg); else + /* FAIL with some message and a condition */ + #define wxFAIL_COND_MSG(cond, msg) \ + wxOnAssert(__TFILE__, __LINE__, __WXFUNCTION__, _T(cond), msg) - // 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); + /* 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) ) */ + /* */ + /* NB: this is made obsolete by wxCOMPILE_TIME_ASSERT() and should no */ + /* longer be used. */ + extern bool WXDLLIMPEXP_BASE wxAssertIsEqual(int x, int y); #else #define wxTrap() - // nothing to do in release modes (hopefully at this moment there are - // no more bugs ;-) + /* nothing to do in release mode (hopefully at this moment there are */ + /* no more bugs ;-) */ #define wxASSERT(cond) - #define wxASSERT_MSG(x, m) -#endif //__WXDEBUG__ + #define wxASSERT_MSG(cond, msg) + #define wxFAIL + #define wxFAIL_MSG(msg) + #define wxFAIL_COND_MSG(cond, msg) +#endif /* __WXDEBUG__ */ -// special form of assert: always triggers it (in debug mode) -#define wxFAIL wxASSERT(wxFalse) +#ifdef __cplusplus + /* Use of wxFalse instead of false suppresses compiler warnings about testing */ + /* constant expression */ + extern WXDLLIMPEXP_DATA_BASE(const bool) wxFalse; +#endif -// FAIL with some message -#define wxFAIL_MSG(msg) wxASSERT_MSG(wxFalse, msg) +#define wxAssertFailure wxFalse -// NB: the following macros work also in release mode! +/* NB: the following macros also work 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 + invalid parameter (e.g. a 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!!") ) */ -// check that expression is true, "return" if not (also FAILs in debug mode) -#define wxCHECK(x, rc) if (!(x)) {wxFAIL; return rc; } +/* check that expression is true, "return" if not (also FAILs in debug mode) */ +#define wxCHECK(cond, rc) wxCHECK_MSG(cond, rc, NULL) -// as wxCHECK but with a message explaining why we fail -#define wxCHECK_MSG(x, rc, msg) if (!(x)) {wxFAIL_MSG(msg); return rc; } +/* as wxCHECK but with a message explaining why we fail */ +#define wxCHECK_MSG(cond, rc, msg) wxCHECK2_MSG(cond, return rc, msg) + +/* check that expression is true, perform op if not */ +#define wxCHECK2(cond, op) wxCHECK2_MSG(cond, op, NULL) + +/* as wxCHECK2 but with a message explaining why we fail */ + +/* see comment near the definition of wxASSERT_MSG for the # if/else reason */ +#if defined(__MWERKS__) + #define wxCHECK2_MSG(cond, op, msg) \ + if ( cond ) \ + {} \ + else \ + { \ + wxFAIL_COND_MSG(#cond, msg); \ + op; \ + } \ + struct wxDummyCheckStruct /* just to force a semicolon */ +#else + #define wxCHECK2_MSG(cond, op, msg) \ + if ( cond ) \ + ; \ + else \ + { \ + wxFAIL_COND_MSG(#cond, msg); \ + op; \ + } \ + struct wxDummyCheckStruct /* just to force a semicolon */ +#endif -// check that expression is true, perform op if not -#define wxCHECK2(x, op) if (!(x)) {wxFAIL; 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(cond, msg) wxCHECK2_MSG(cond, return, msg) -// as wxCHECK2 but with a message explaining why we fail -#define wxCHECK2_MSG(x, op, msg) if (!(x)) {wxFAIL_MSG(msg); op; } +/* ---------------------------------------------------------------------------- */ +/* Compile time asserts */ +/* */ +/* Unlike the normal assert and related macros above which are checked during */ +/* the program tun-time the macros below will result in a compilation error if */ +/* the condition they check is false. This is usually used to check the */ +/* expressions containing sizeof()s which cannot be tested with the */ +/* preprocessor. If you can use the #if's, do use them as you can give a more */ +/* detailed error message then. */ +/* ---------------------------------------------------------------------------- */ -// 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; } +/* + How this works (you don't have to understand it to be able to use the + macros): we rely on the fact that it is invalid to define a named bit field + in a struct of width 0. All the rest are just the hacks to minimize the + possibility of the compiler warnings when compiling this macro: in + particular, this is why we define a struct and not an object (which would + result in a warning about unused variable) and a named struct (otherwise we'd + get a warning about an unnamed struct not used to define an object!). + */ + +#define wxMAKE_UNIQUE_ASSERT_NAME wxMAKE_UNIQUE_NAME(wxAssert_) + +/* + The second argument of this macro must be a valid C++ identifier and not a + string. I.e. you should use it like this: + + wxCOMPILE_TIME_ASSERT( sizeof(int) >= 2, YourIntsAreTooSmall ); + + It may be used both within a function and in the global scope. +*/ +#if defined(__WATCOMC__) && defined(__cplusplus) + /* avoid "unused symbol" warning */ + #define wxCOMPILE_TIME_ASSERT(expr, msg) \ + class wxMAKE_UNIQUE_ASSERT_NAME { \ + unsigned int msg: expr; \ + wxMAKE_UNIQUE_ASSERT_NAME() { wxUnusedVar(msg); } \ + } +#else + #define wxCOMPILE_TIME_ASSERT(expr, msg) \ + struct wxMAKE_UNIQUE_ASSERT_NAME { unsigned int msg: expr; } +#endif + +/* + When using VC++ 6 with "Edit and Continue" on, the compiler completely + mishandles __LINE__ and so wxCOMPILE_TIME_ASSERT() doesn't work, provide a + way to make "unique" assert names by specifying a unique prefix explicitly + */ +#define wxMAKE_UNIQUE_ASSERT_NAME2(text) wxCONCAT(wxAssert_, text) + +#define wxCOMPILE_TIME_ASSERT2(expr, msg, text) \ + struct wxMAKE_UNIQUE_ASSERT_NAME2(text) { unsigned int msg: expr; } + +/* helpers for wxCOMPILE_TIME_ASSERT below, for private use only */ +#define wxMAKE_BITSIZE_MSG(type, size) type ## SmallerThan ## size ## Bits + +/* a special case of compile time assert: check that the size of the given type */ +/* is at least the given number of bits */ +#define wxASSERT_MIN_BITSIZE(type, size) \ + wxCOMPILE_TIME_ASSERT(sizeof(type) * CHAR_BIT >= size, \ + wxMAKE_BITSIZE_MSG(type, size)) + +/* ---------------------------------------------------------------------------- */ +/* other miscellaneous debugger-related functions */ +/* ---------------------------------------------------------------------------- */ + +/* + Return true if we're running under debugger. -#endif // _WX_DEBUG_H_ + Currently this only really works under Win32 and Mac in CodeWarrior builds, + it always returns false in other cases. + */ +#ifdef __cplusplus + /* ABX: check __WIN32__ instead of __WXMSW__ for the same MSWBase in any Win32 port */ + #if defined(__WXMAC__) || defined(__WIN32__) + extern bool WXDLLIMPEXP_BASE wxIsDebuggerRunning(); + #else /* !Mac */ + inline bool wxIsDebuggerRunning() { return false; } + #endif /* Mac/!Mac */ +#endif /* __cplusplus */ +#endif /* _WX_DEBUG_H_ */