SpmiFirstCx Subroutine

Purpose

Locates the first subcontext of a context.

Library

SPMI Library (libSpmi.a)

Syntax

#include sys/Spmidef.h

struct SpmiCxLink *SpmiFirstCx(CxHandle)
SpmiCxHdl CxHandle;

Description

The SpmiFirstCx subroutine locates the first subcontext of a context. The subroutine returns a NULL value if no subcontexts are found.

The structure pointed to by the returned pointer contains a handle to access the contents of the corresponding SpmiCx structure through the SpmiGetCxsubroutine call.

This subroutine is part of the server option of the Performance Aide for AIX® licensed product and is also included in the Performance Toolbox for AIX licensed product.

Parameters

CxHandle

Specifies a valid SpmiCxHdl handle as obtained by another subroutine call.

Return Values

The SpmiFirstCx subroutine returns a pointer to an SpmiCxLink structure if successful. If unsuccessful, the subroutine returns a NULL value.

Error Codes

All SPMI subroutines use external variables to provide error information. To access these variables, an application program must define the following external variables:

• extern char SpmiErrmsg[];
• extern int SpmiErrno;

If the subroutine returns without an error, the SpmiErrno variable is set to 0 and the SpmiErrmsg character array is empty. If an error is detected, the SpmiErrno variable returns an error code, as defined in the sys/Spmidef.h file, and the SpmiErrmsg variable contains text, in English, explaining the cause of the error. See the List of SPMI Error Codes for more information.

Files