MkExceptionC_C_API

MkExceptionC - The default-exception of the Programming-Language-Micro-Kernel (PLMK) … More...

Collaboration diagram for MkExceptionC_C_API:

Functions
bool	libmkkernel::MkExceptionCheck (MK_EXP exception)
	Checks if Exception is of type MkExceptionC and returns true or false …
void	libmkkernel::MkExceptionRaise (MK_MNG const expobj, MK_STRN const callfunc, MK_I32 const callline)
	convert an MkErrorC into a Target-Programming-Language (TPL) exception …
MK_ERR	libmkkernel::MkExceptionCatch (MK_MNG const expobj, MK_EXP const exception, MK_STRN const callfunc)
	convert an Target-Programming-Language (TPL) exception into an MkErrorC …

Detailed Description

MkExceptionC - The default-exception of the Programming-Language-Micro-Kernel (PLMK) …

The Programming-Language-Micro-Kernel (PLMK) provide with MkErrorC a complete error-handling with focus to support the "C" Programming-Language. The support include catch, raise, signal and attributes. In addition every Target-Programming-Language (TPL) add their own error-handling and the purpose of MkExceptionC is to integrate the MkErrorC into the Target-Programming-Language (TPL).

The default-exception MkExceptionC is used to connect the MkErrorC with the Target-Programming-Language (TPL) error-object.

• The default-error is defined in MkRuntimeS::error_mk.
• On error the default-error is set to the error-data, the MkErrorE status change to libmkkernel::MK_ERROR.
• The non-C language create a copy from the default-error and throw the copy as MkExceptionC exception.
• The C language just return the MkErrorE status of the default-error.

The implementation of an exception depends heavily on the Target-Programming-Language (TPL), starting with no exception at all, for example. C, an exception as a class object, or as an exception as a global attribute.

Attention

• All MkExceptionC code is implemented at the Target-Programming-Language (TPL) without support by the Programming-Language-Micro-Kernel (PLMK) compiler.
• By default, MkExceptionC is only used internally, hidden by the class MkErrorC.

Function Documentation

MkExceptionCatch()

MK_ERR libmkkernel::MkExceptionCatch	(	MK_MNG const	expobj,
		MK_EXP const	exception,
		MK_STRN const	callfunc )

convert an Target-Programming-Language (TPL) exception into an MkErrorC …

Parameters

[in]	expobj	The LibMsgqueObject used to personalize the exception/error (will be validated first)
[in]	exception	the exception object from C++, if MK_NULL the global exception object is used
[in]	callfunc	a user-defined postfix to identify the calling function or the environment (default=name-of-function)

Returns

the MkErrorC created with data from exception

MkExceptionCheck()

bool libmkkernel::MkExceptionCheck

(

MK_EXP

exception

)

Checks if Exception is of type MkExceptionC and returns true or false …

Example: test case to check KILL and RECOVER feature, check on MkExceptionC

            MK_I32 PID, RET=0;
            auto VAL = ReadBUF();
            Client cl;
            cl.LinkCreate(ConfigGetStartAs());
            cl.Send("W","GPID@I", &PID);
            SysKill(PID,9);
            for (int i = 0; i < 3; i++) {
              try {
                cl.Send("W","ECOI:U@I", VAL, &RET);
              } catch (const MkExceptionC &ex) {
                auto err = cl.ErrorCatch(ex);
                if (err->IsSOCKET()) {
                  err->Reset();
                  cl.LinkConnect();
                  continue;
                } else {
                  err->Raise();
                }
              }
              break;
            }
            SendSTART();
            SendI32(RET);

Returns

the result of the check, true or false

Parameters

[in]

exception

the exception object from C++, if MK_NULL the global exception object is used

MkExceptionRaise()

void libmkkernel::MkExceptionRaise	(	MK_MNG const	expobj,
		MK_STRN const	callfunc,
		MK_I32 const	callline )

convert an MkErrorC into a Target-Programming-Language (TPL) exception …

Parameters

[in]	expobj	The LibMsgqueObject used to personalize the exception/error (will be validated first)
[in]	callfunc	a user-defined postfix to identify the calling function or the environment (default=name-of-function)
[in]	callline	the number of the line the call take place (e.g. LINE)