390 lines
12 KiB
C
390 lines
12 KiB
C
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/debug.h
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// Purpose: interface of global functions
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/** @addtogroup group_funcmacro_debug */
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//@{
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/**
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Exits the program immediately.
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This is a simple wrapper for the standard abort() function which is not
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available under all platforms (currently only Windows CE doesn't provide
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it).
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@since 2.9.4
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*/
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void wxAbort();
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/**
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@def wxDEBUG_LEVEL
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Preprocessor symbol defining the level of debug support available.
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This symbol is defined to 1 by default meaning that asserts are compiled in
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(although they may be disabled by a call to wxDisableAsserts()). You may
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predefine it as 0 prior to including any wxWidgets headers to omit the
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calls to wxASSERT() and related macros entirely in your own code and you
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may also predefine it as 0 when building wxWidgets to also avoid including
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any asserts in wxWidgets itself.
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Alternatively, you may predefine it as 2 to include wxASSERT_LEVEL_2() and
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similar macros which are used for asserts which have non-trivial run-time
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costs and so are disabled by default.
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@since 2.9.1
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@header{wx/debug.h}
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*/
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#define wxDEBUG_LEVEL
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/**
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@def __WXDEBUG__
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Compatibility macro indicating presence of debug support.
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This symbol is defined if wxDEBUG_LEVEL is greater than 0 and undefined
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otherwise.
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@header{wx/debug.h}
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*/
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#define __WXDEBUG__
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/**
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Type for the function called in case of assert failure.
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@see wxSetAssertHandler()
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*/
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typedef void (*wxAssertHandler_t)(const wxString& file,
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int line,
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const wxString& func,
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const wxString& cond,
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const wxString& msg);
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/**
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Assert macro. An error message will be generated if the condition is @false in
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debug mode, but nothing will be done in the release build.
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Please note that the condition in wxASSERT() should have no side effects
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because it will not be executed in release mode at all.
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This macro should be used to catch (in debug builds) logical errors done
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by the programmer.
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@see wxASSERT_MSG(), wxCOMPILE_TIME_ASSERT()
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@header{wx/debug.h}
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*/
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#define wxASSERT( condition )
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/**
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Assert macro for expensive run-time checks.
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This macro does nothing unless wxDEBUG_LEVEL is 2 or more and is meant to
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be used for the assertions with noticeable performance impact and which,
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hence, should be disabled during run-time.
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If wxDEBUG_LEVEL is 2 or more, it becomes the same as wxASSERT().
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@header{wx/debug.h}
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*/
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#define wxASSERT_LEVEL_2( condition )
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/**
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Assert macro with a custom message for expensive run-time checks.
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If wxDEBUG_LEVEL is 2 or more, this is the same as wxASSERT_MSG(),
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otherwise it doesn't do anything at all.
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@see wxASSERT_LEVEL_2()
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@header{wx/debug.h}
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*/
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#define wxASSERT_LEVEL_2_MSG( condition, msg)
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/**
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This macro results in a @ref wxCOMPILE_TIME_ASSERT "compile time assertion failure"
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if the size of the given @c type is less than @c size bits.
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This macro should be used to catch (in debug builds) logical errors done
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by the programmer.
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You may use it like this, for example:
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@code
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// we rely on the int being able to hold values up to 2^32
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wxASSERT_MIN_BITSIZE(int, 32);
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// can't work with the platforms using UTF-8 for wchar_t
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wxASSERT_MIN_BITSIZE(wchar_t, 16);
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@endcode
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@header{wx/debug.h}
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*/
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#define wxASSERT_MIN_BITSIZE( type, size )
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/**
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Assert macro with message.
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An error message will be generated if the condition is @false.
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This macro should be used to catch (in debug builds) logical errors done
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by the programmer.
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@see wxASSERT(), wxCOMPILE_TIME_ASSERT()
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@header{wx/debug.h}
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*/
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#define wxASSERT_MSG( condition, message )
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/**
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Checks that the condition is @true, returns with the given return value if
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not (stops execution in debug mode). This check is done even in release mode.
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This macro should be used to catch (both in debug and release builds) logical
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errors done by the programmer.
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@header{wx/debug.h}
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*/
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#define wxCHECK( condition, retValue )
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/**
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Checks that the condition is @true, returns with the given return value if
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not (stops execution in debug mode). This check is done even in release mode.
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This macro may be only used in non-void functions, see also wxCHECK_RET().
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This macro should be used to catch (both in debug and release builds) logical
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errors done by the programmer.
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@header{wx/debug.h}
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*/
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#define wxCHECK_MSG( condition, retValue, message )
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/**
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Checks that the condition is @true, and returns if not (stops execution
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with the given error message in debug mode). This check is done even in
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release mode.
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This macro should be used in void functions instead of wxCHECK_MSG().
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This macro should be used to catch (both in debug and release builds) logical
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errors done by the programmer.
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@header{wx/debug.h}
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*/
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#define wxCHECK_RET( condition, message )
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/**
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Checks that the condition is @true, and if not, it will wxFAIL() and
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execute the given @c operation if it is not. This is a generalisation of
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wxCHECK() and may be used when something else than just returning from the
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function must be done when the @c condition is @false. This check is done
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even in release mode.
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This macro should be used to catch (both in debug and release builds) logical
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errors done by the programmer.
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@header{wx/debug.h}
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*/
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#define wxCHECK2(condition, operation)
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/**
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This is the same as wxCHECK2(), but wxFAIL_MSG() with the specified
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@c message is called instead of wxFAIL() if the @c condition is @false.
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This macro should be used to catch (both in debug and release builds) logical
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errors done by the programmer.
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@header{wx/debug.h}
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*/
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#define wxCHECK2_MSG( condition, operation, message )
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/**
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Using wxCOMPILE_TIME_ASSERT() results in a compilation error if the
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specified @c condition is @false. The compiler error message should include
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the @c message identifier - please note that it must be a valid C++
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identifier and not a string unlike in the other cases.
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This macro is mostly useful for testing the expressions involving the
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@c sizeof operator as they can't be tested by the preprocessor but it is
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sometimes desirable to test them at the compile time.
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Note that this macro internally declares a struct whose name it tries to
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make unique by using the @c __LINE__ in it but it may still not work if you
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use it on the same line in two different source files. In this case you may
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either change the line in which either of them appears on or use the
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wxCOMPILE_TIME_ASSERT2() macro.
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Also note that Microsoft Visual C++ has a bug which results in compiler
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errors if you use this macro with 'Program Database For Edit And Continue'
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(@c /ZI) option, so you shouldn't use it ('Program Database' (@c /Zi) is ok
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though) for the code making use of this macro.
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This macro should be used to catch misconfigurations at compile-time.
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@see wxASSERT_MSG(), wxASSERT_MIN_BITSIZE()
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@header{wx/debug.h}
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*/
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#define wxCOMPILE_TIME_ASSERT( condition, message )
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/**
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This macro is identical to wxCOMPILE_TIME_ASSERT() except that it allows
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you to specify a unique @c name for the struct internally defined by this
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macro to avoid getting the compilation errors described for
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wxCOMPILE_TIME_ASSERT().
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This macro should be used to catch misconfigurations at compile-time.
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@header{wx/debug.h}
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*/
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#define wxCOMPILE_TIME_ASSERT2(condition, message, name)
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/**
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Disable the condition checks in the assertions.
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This is the same as calling wxSetAssertHandler() with @NULL handler.
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@since 2.9.0
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@header{wx/debug.h}
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*/
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void wxDisableAsserts();
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/**
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@def wxDISABLE_ASSERTS_IN_RELEASE_BUILD
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Use this macro to disable asserts in release build when not using
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wxIMPLEMENT_APP().
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By default, assert message boxes are suppressed in release build by
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wxIMPLEMENT_APP() which uses this macro. If you don't use wxIMPLEMENT_APP()
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because your application initializes wxWidgets directly (e.g. calls
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wxEntry() or wxEntryStart() itself) but still want to suppress assert
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notifications in release build you need to use this macro directly.
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@see wxDISABLE_DEBUG_SUPPORT()
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@since 2.9.1
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@header{wx/debug.h}
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*/
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#define wxDISABLE_ASSERTS_IN_RELEASE_BUILD() wxDisableAsserts()
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/**
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Will always generate an assert error if this code is reached (in debug mode).
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Note that you don't have to (and cannot) use brackets when invoking this
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macro:
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@code
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if (...some condition...) {
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wxFAIL;
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}
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@endcode
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This macro should be used to catch (in debug builds) logical errors done
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by the programmer.
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@see wxFAIL_MSG()
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@header{wx/debug.h}
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*/
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#define wxFAIL
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/**
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Will always generate an assert error with specified message if this code is
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reached (in debug mode).
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This macro is useful for marking "unreachable" code areas, for example it
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may be used in the "default:" branch of a switch statement if all possible
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cases are processed above.
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This macro should be used to catch (in debug builds) logical errors done
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by the programmer.
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@see wxFAIL()
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@header{wx/debug.h}
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*/
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#define wxFAIL_MSG( message )
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/**
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Returns @true if the program is running under debugger, @false otherwise.
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Please note that this function is currently only implemented for Win32 and
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always returns @false elsewhere.
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@header{wx/debug.h}
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*/
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bool wxIsDebuggerRunning();
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/**
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Sets the function to be called in case of assertion failure.
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The default assert handler forwards to wxApp::OnAssertFailure() whose
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default behaviour is, in turn, to show the standard assertion failure
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dialog if a wxApp object exists or shows the same dialog itself directly
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otherwise.
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While usually it is enough -- and more convenient -- to just override
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OnAssertFailure(), to handle all assertion failures, including those
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occurring even before wxApp object creation of after its destruction you
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need to provide your assertion handler function.
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This function also provides a simple way to disable all asserts: simply
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pass @NULL pointer to it. Doing this will result in not even evaluating
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assert conditions at all, avoiding almost all run-time cost of asserts.
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Notice that this function is not MT-safe, so you should call it before
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starting any other threads.
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The return value of this function is the previous assertion handler. It can
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be called after any pre-processing by your handler and can also be restored
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later if you uninstall your handler.
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@param handler
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The function to call in case of assertion failure or @NULL.
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@return
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The previous assert handler which is not @NULL by default but could be
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@NULL if it had been previously set to this value using this function.
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@since 2.9.0
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@header{wx/debug.h}
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*/
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wxAssertHandler_t wxSetAssertHandler(wxAssertHandler_t handler);
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/**
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Reset the assert handler to default function which shows a message box when
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an assert happens.
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This can be useful for the applications compiled in release build (with @c
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NDEBUG defined) for which the asserts are by default disabled: if you wish
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to enable them even in this case you need to call this function.
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@since 2.9.1
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@header{wx/debug.h}
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*/
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void wxSetDefaultAssertHandler();
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/**
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Generate a debugger exception meaning that the control is passed to the
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debugger if one is attached to the process.
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Otherwise the program just terminates abnormally.
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If @c wxDEBUG_LEVEL is 0 (which is not the default) this function does
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nothing.
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@header{wx/debug.h}
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*/
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void wxTrap();
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//@}
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