+ Assertion macros: check if the condition is true and call assert handler
+ (which will by default notify the user about failure) if it isn't.
+
+ wxASSERT and wxFAIL macros as well as wxTrap() function do nothing at all
+ if wxDEBUG_LEVEL is 0 however they do check their conditions at default
+ debug level 1, unlike the previous wxWidgets versions.
+
+ wxASSERT_LEVEL_2 is meant to be used for "expensive" asserts which should
+ normally be disabled because they have a big impact on performance and so
+ this macro only does anything if wxDEBUG_LEVEL >= 2.
+ */
+#if wxDEBUG_LEVEL
+ // wxTrap() can be used to break into the debugger unconditionally
+ // (assuming the program is running under debugger, of course).
+ //
+ // If possible, we prefer to define it as a macro rather than as a function
+ // to open the debugger at the position where we trapped and not inside the
+ // trap function itself which is not very useful.
+ #if wxCHECK_VISUALC_VERSION(7)
+ #define wxTrap() __debugbreak()
+ #else
+ extern WXDLLIMPEXP_BASE void wxTrap();
+ #endif // Win VisualC
+
+ // Global flag used to indicate that assert macros should call wxTrap(): it
+ // is set by the default assert handler if the user answers yes to the
+ // question of whether to trap.
+ extern WXDLLIMPEXP_DATA_BASE(bool) wxTrapInAssert;
+
+ // This macro checks if the condition is true and calls the assert handler
+ // with the provided message if it isn't and finally traps if the special
+ // flag indicating that it should do it was set by the handler.
+ //
+ // Notice that we don't use the handler return value for compatibility
+ // reasons (if we changed its return type, we'd need to change wxApp::
+ // OnAssertFailure() too which would break user code overriding it), hence
+ // the need for the ugly global flag.
+ #define wxASSERT_MSG(cond, msg) \
+ wxSTATEMENT_MACRO_BEGIN \
+ if ( wxTheAssertHandler && !(cond) && \
+ (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__, \
+ #cond, msg), wxTrapInAssert) ) \
+ { \
+ wxTrapInAssert = false; \
+ wxTrap(); \
+ } \
+ wxSTATEMENT_MACRO_END
+
+ // a version without any additional message, don't use unless condition
+ // itself is fully self-explanatory
+ #define wxASSERT(cond) wxASSERT_MSG(cond, (const char*)NULL)
+
+ // wxFAIL is a special form of assert: it always triggers (and so is
+ // usually used in normally unreachable code)
+ #define wxFAIL_COND_MSG(cond, msg) \
+ wxSTATEMENT_MACRO_BEGIN \
+ if ( wxTheAssertHandler && \
+ (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__, \
+ cond, msg), wxTrapInAssert) ) \
+ { \
+ wxTrapInAssert = false; \
+ wxTrap(); \
+ } \
+ wxSTATEMENT_MACRO_END
+
+ #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("Assert failure", msg)
+ #define wxFAIL wxFAIL_MSG((const char*)NULL)
+#else // !wxDEBUG_LEVEL
+ #define wxTrap()
+
+ #define wxASSERT(cond)
+ #define wxASSERT_MSG(cond, msg)
+ #define wxFAIL
+ #define wxFAIL_MSG(msg)
+ #define wxFAIL_COND_MSG(cond, msg)
+#endif // wxDEBUG_LEVEL
+
+#if wxDEBUG_LEVEL >= 2
+ #define wxASSERT_LEVEL_2_MSG(cond, msg) wxASSERT_MSG(cond, msg)
+ #define wxASSERT_LEVEL_2(cond) wxASSERT(cond)
+#else // wxDEBUG_LEVEL < 2
+ #define wxASSERT_LEVEL_2_MSG(cond, msg)
+ #define wxASSERT_LEVEL_2(cond)
+#endif
+
+// This is simply a wrapper for the standard abort() which is not available
+// under all platforms.
+//
+// It isn't really debug-related but there doesn't seem to be any better place
+// for it, so declare it here and define it in appbase.cpp, together with
+// wxTrap().
+extern void WXDLLIMPEXP_BASE wxAbort();
+
+/*
+ wxCHECK macros always check their conditions, setting debug level to 0 only
+ makes them silent in case of failure, otherwise -- including at default
+ debug level 1 -- they call the assert handler if the condition is false
+
+ They are supposed to 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 use
+
+ wxCHECK_RET( p != NULL, "pointer can't be NULL" )
projects / wxWidgets.git / blobdiff