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dolphin/Externals/wxWidgets/include/wx/debug.h

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/**
* 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: debug.h 54492 2008-07-05 17:54:03Z SN $
* Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
* 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 <assert.h>
#endif
#include <limits.h> /* 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 (<assert.h> 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. */
/* ---------------------------------------------------------------------------- */
/* 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 is called whenever one of debugging macros fails (i.e.
condition is false in an assertion). To customize its behaviour, override
wxApp::OnAssert().
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 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 unconditionally (assuming */
/* the program is running under debugger, of course) */
extern void WXDLLIMPEXP_BASE wxTrap();
/* generic assert macro */
#define wxASSERT(cond) wxASSERT_MSG(cond, NULL)
/* 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)
/* FAIL with some message */
#define wxFAIL_MSG(msg) wxFAIL_COND_MSG("wxAssertFailure", msg)
/* 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) ) */
/* */
/* 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 mode (hopefully at this moment there are */
/* no more bugs ;-) */
#define wxASSERT(cond)
#define wxASSERT_MSG(cond, msg)
#define wxFAIL
#define wxFAIL_MSG(msg)
#define wxFAIL_COND_MSG(cond, msg)
#endif /* __WXDEBUG__ */
#ifdef __cplusplus
/* Use of wxFalse instead of false suppresses compiler warnings about testing */
/* constant expression */
extern WXDLLIMPEXP_DATA_BASE(const bool) wxFalse;
#endif
#define wxAssertFailure wxFalse
/* NB: the following macros also work in release mode! */
/*
These macros must be used only in invalid situation: for example, an
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(cond, rc) wxCHECK_MSG(cond, rc, NULL)
/* 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 */
#ifdef __GNUC__
#define wxFORCE_SEMICOLON typedef int wxDummyCheckInt
/* Note: old gcc versions (e.g. 2.8) give an internal compiler error */
/* on a simple forward declaration, when used in a template */
/* function, so rather use a dummy typedef which does work... */
#else
#define wxFORCE_SEMICOLON struct wxDummyCheckStruct
/* Note2: however, some other compilers (notably Digital Mars */
/* don't like multiple typedefs (even though the standard */
/* does allow them), so use a forward declaration for non-gcc. */
#endif
/* 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; \
} \
wxFORCE_SEMICOLON /* just to force a semicolon */
#endif
/* 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)
/* ---------------------------------------------------------------------------- */
/* 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. */
/* ---------------------------------------------------------------------------- */
/*
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.
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_ */
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