man pages section 3: Extended Library Functions, Volume 1

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Updated: July 2014
 
 

cpc_event_diff(3CPC)

Name

cpc_event_diff, cpc_event_accum - simple difference and accumulate operations

Synopsis

cc [ flag... ] file... −lcpc [ library... ]
#include <libcpc.h>

void cpc_event_accum(cpc_event_t *accum, cpc_event_t *event);
void cpc_event_diff(cpc_event_t *diff, cpc_event_t *after,
     cpc_event_t *before);

Description

The cpc_event_accum() and cpc_event_diff() functions perform common accumulate and difference operations on cpc_event(3CPC) data structures. Use of these functions increases program portability, since structure members are not referenced directly .

cpc_event_accum()

The cpc_event_accum() function adds the ce_pic fields of event into the corresponding fields of accum. The ce_hrt field of accum is set to the later of the times in event and accum.

SPARC:

The function adds the contents of the ce_tick field of event into the corresponding field of accum.

x86:

The function adds the contents of the ce_tsc field of event into the corresponding field of accum.

cpc_event_diff()

The cpc_event_diff() function places the difference between the ce_pic fields of after and before and places them in the corresponding field of diff. The ce_hrt field of diff is set to the ce_hrt field of after.

SPARC:

Additionally, the function computes the difference between the ce_tick fields of after and before, and places it in the corresponding field of diff.

x86:

Additionally, the function computes the difference between the ce_tsc fields of after and before, and places it in the corresponding field of diff.

Attributes

See attributes(5) for descriptions of the following attributes:

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

See Also

cpc(3CPC), cpc_buf_add(3CPC), cpc_buf_sub(3CPC), cpc_event(3CPC), libcpc(3LIB), attributes (5)

Notes

The cpc_event_accum() and cpc_event_diff() functions exist for binary compatibility only. Source containing these functions will not compile. These functions are obsolete and might be removed in a future release. Applications should use cpc_buf_add(3CPC) and cpc_buf_sub(3CPC) instead.