vmlSetErrorCallBack

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 10/31/2024

Version

Public

Visible to Intel only — GUID: GUID-CCD9240B-E4C0-4BC8-BBE9-57FDB9207500

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vmlSetErrorCallBack

Sets the additional error handler callback function and gets the old callback function.

Syntax

oldcallback = vmlSetErrorCallBack( callback );

Include Files

mkl.h

Input Parameters

Name		Description

callback	Pointer to the callback function.	The callback function has the following format: static int __cdecl MyHandler(DefVmlErrorContext* pContext) { /* Handler body / }; The passed error structure is defined as follows: typedef struct _DefVmlErrorContext { int iCode;/ Error status value / int iIndex;/ Index for bad array element, or bad array dimension, or bad array pointer / double dbA1; / Error argument 1 / double dbA2; / Error argument 2 / double dbR1; / Error result 1 / double dbR2; / Error result 2 / char cFuncName[64]; / Function name / int iFuncNameLen; / Length of functionname/ double dbA1Im; / Error argument 1, imag part/ double dbA2Im; / Error argument 2, imag part/ double dbR1Im; / Error result 1, imag part/ double dbR2Im; / Error result 2, imag part*/ } DefVmlErrorContext;

Name

Description

callback

Pointer to the callback function.

The callback function has the following format:

static int __cdecl MyHandler(DefVmlErrorContext*

pContext)

   /* Handler body */

};

The passed error structure is defined as follows:

typedef struct _DefVmlErrorContext

int iCode;/* Error status value */

int iIndex;/* Index for bad array

   element, or bad array

   dimension, or bad

   array pointer */

double dbA1; /* Error argument 1 */

double dbA2; /* Error argument 2 */

double dbR1; /* Error result 1 */

double dbR2; /* Error result 2 */

char cFuncName[64]; /* Function name */

int iFuncNameLen; /* Length of functionname*/

double dbA1Im; /* Error argument 1, imag part*/

double dbA2Im; /* Error argument 2, imag part*/

double dbR1Im; /* Error result 1, imag part*/

double dbR2Im; /* Error result 2, imag part*/

} DefVmlErrorContext;

Output Parameters

Name	Type	Description
oldcallback	int	Pointer to the former callback function.

Description

The callback function is called on each VM mathematical function error if VML_ERRMODE_CALLBACK error mode is set (see "Values of the mode Parameter").

Use the vmlSetErrorCallBack() function if you need to define your own callback function instead of default empty callback function.

The input structure for a callback function contains the following information about the error encountered:

the input value that caused an error
location (array index) of this value
the computed result value
error code
name of the function in which the error occurred.

You can insert your own error processing into the callback function. This may include correcting the passed result values in order to pass them back and resume computation. The standard error handler is called after the callback function only if it returns 0.

Parent topic: VM Service Functions

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Developer Reference for Intel® oneAPI Math Kernel Library for C

vmlSetErrorCallBack

Syntax

Include Files

Input Parameters

Output Parameters

Description