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library: minor tweaks of program logic and/or comments

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This commit just corrects the oversight wherein 'item'
was being employed when 'these' was actually intended.

Also, it trades some 'item' use for a more descriptive
input parameter which henceforth is known as a 'dest'.

And, there was one leftover 'next' pointer eliminated.

Finally, some logic was made a tad less dependent upon
enumerator names and a few comments were also updated.

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2015-07-23 00:00:00 -05:00
committed by Craig Small
parent aa7ff688db
commit 63e828fe88
4 changed files with 34 additions and 35 deletions
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44
proc/readstat.c
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@ -441,24 +441,24 @@ reap_em_again:
*/
PROCPS_EXPORT int procps_stat_jiffs_get (
struct procps_stat *info,
struct procps_jiffs *item,
struct procps_jiffs *dest,
int which)
{
struct procps_jiffs_private *p;
int i;
if (info == NULL || item == NULL)
if (info == NULL || dest == NULL)
return -EINVAL;
if (which < 0) {
// note, we're just copying the 'new' portion of our procps_jiffs_private
memcpy(item, &info->cpu_summary, sizeof(struct procps_jiffs));
memcpy(dest, &info->cpu_summary, sizeof(struct procps_jiffs));
return 0;
}
p = info->jiff_hists;
for (i = 0; i < info->jiff_hists_inuse; i++) {
if (p->cpu.id == which) {
// note, we're just copying the 'new' portion of our procps_jiffs_private
memcpy(item, p, sizeof(struct procps_jiffs));
memcpy(dest, p, sizeof(struct procps_jiffs));
return 0;
}
++p;
@ -470,30 +470,30 @@ PROCPS_EXPORT int procps_stat_jiffs_get (
* procps_stat_jiffs_fill:
*
* Refresh available cpu data, then return all cpu data in the caller
* supplied structures, up to the lesser of numitems or total available.
* supplied structures, up to the lesser of maxdests or total available.
*
* We tolerate a numitems greater than the total available, and
* We tolerate a maxdests greater than the total available, and
* the caller had better tolerate fewer returned than requested.
*
* This function deals only with the 'current' jiffs counts.
*/
PROCPS_EXPORT int procps_stat_jiffs_fill (
struct procps_stat *info,
struct procps_jiffs *item,
int numitems)
struct procps_jiffs *dests,
int maxdests)
{
int i, rc;
if (info == NULL || item == NULL)
if (info == NULL || dests == NULL)
return -EINVAL;
if ((rc = procps_stat_read_jiffs(info)) < 0)
return rc;
if (!info->jiff_hists_inuse)
return -1;
for (i = 0; i < info->jiff_hists_inuse && i < numitems; i++) {
for (i = 0; i < info->jiff_hists_inuse && i < maxdests; i++) {
// note, we're just copying the 'new' portion of our procps_jiffs_private
memcpy(item + i, info->jiff_hists + i, sizeof(struct procps_jiffs));
memcpy(dests + i, info->jiff_hists + i, sizeof(struct procps_jiffs));
}
return i;
}
@ -508,22 +508,22 @@ PROCPS_EXPORT int procps_stat_jiffs_fill (
*/
PROCPS_EXPORT int procps_stat_jiffs_hist_get (
struct procps_stat *info,
struct procps_jiffs_hist *item,
struct procps_jiffs_hist *dest,
int which)
{
struct procps_jiffs_private *p;
int i;
if (info == NULL || item == NULL)
if (info == NULL || dest == NULL)
return -EINVAL;
if (which < 0) {
memcpy(item, &info->cpu_summary, sizeof(struct procps_jiffs_hist));
memcpy(dest, &info->cpu_summary, sizeof(struct procps_jiffs_hist));
return 0;
}
p = info->jiff_hists;
for (i = 0; i < info->jiff_hists_inuse; i++) {
if (p->cpu.id == which) {
memcpy(item, p, sizeof(struct procps_jiffs_hist));
memcpy(dest, p, sizeof(struct procps_jiffs_hist));
return 0;
}
++p;
@ -535,29 +535,29 @@ PROCPS_EXPORT int procps_stat_jiffs_hist_get (
* procps_stat_jiffs_hist_fill:
*
* Refresh available cpu data, then return all cpu data in the caller
* supplied structures, up to the lesser of numitems or total available.
* supplied structures, up to the lesser of maxdests or total available.
*
* We tolerate a numitems greater than the total available, and
* We tolerate a maxdests greater than the total available, and
* the caller had better tolerate fewer returned than requested.
*
* This function provides both 'new' and 'old' jiffs counts.
*/
PROCPS_EXPORT int procps_stat_jiffs_hist_fill (
struct procps_stat *info,
struct procps_jiffs_hist *item,
int numitems)
struct procps_jiffs_hist *dests,
int maxdests)
{
int i, rc;
if (info == NULL || item == NULL)
if (info == NULL || dests == NULL)
return -EINVAL;
if ((rc = procps_stat_read_jiffs(info)) < 0)
return rc;
if (!info->jiff_hists_inuse)
return -1;
for (i = 0; i < info->jiff_hists_inuse && i < numitems; i++) {
memcpy(item + i, info->jiff_hists + i, sizeof(struct procps_jiffs_hist));
for (i = 0; i < info->jiff_hists_inuse && i < maxdests; i++) {
memcpy(dests + i, info->jiff_hists + i, sizeof(struct procps_jiffs_hist));
}
return i;
}