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man pages section 3: Extended Library Functions, Volume 2

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Updated: Thursday, June 13, 2019
 
 

lgrp_version(3LGRP)

Name

lgrp_version - coordinate library and application versions

Synopsis

cc [ flag … ] file–llgrp [ library … ] 
#include <sys/lgrp_user.h>

int lgrp_version(const int version);

Description

The lgrp_version() function takes an interface version number, version, as an argument and returns an lgroup interface version. The version argument should be the value of LGRP_VER_CURRENT bound to the application when it was compiled or LGRP_VER_NONE to find out the current lgroup interface version on the running system.

Return Values

If version is still supported by the implementation, then lgrp_version() returns the requested version. If LGRP_VER_NONE is returned, the implementation cannot support the requested version. The application should be recompiled and might require further changes.

If version is LGRP_VER_NONE, lgrp_version() returns the current version of the library.

Examples

Example 1 Test whether the version of the interface used by the caller is supported.

The following example tests whether the version of the interface used by the caller is supported:

#include <sys/lgrp_user.h>
 
if (lgrp_version(LGRP_VER_CURRENT) != LGRP_VER_CURRENT) {
    fprintf(stderr, "Built with unsupported lgroup interface %d\n",
        LGRP_VER_CURRENT);
    exit (1);
}

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
MT-Safe

See Also

lgrp_init(3LGRP), liblgrp(3LIB), attributes(7)