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library: add chaining provisions to readstat cpu & sys

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If a caller chooses to reduce the overhead of repeated
function calls, this commit provides for acquiring all
the desired information in just a single library call.

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner
2015-06-28 00:00:00 -05:00
committed by Craig Small
parent 6bb1a033b4
commit 0c162f7af0
3 changed files with 101 additions and 0 deletions
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15
proc/readstat.h
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@@ -46,6 +46,18 @@ enum procps_stat_item {
typedef unsigned long long jiff;
struct procps_cpu_result {
enum procps_cpu_item item;
jiff result;
struct procps_cpu_result *next;
};
struct procps_sys_result {
enum procps_stat_item item;
int result;
struct procps_sys_result *next;
};
struct procps_statinfo;
int procps_stat_new (struct procps_statinfo **info);
@@ -55,7 +67,10 @@ struct procps_statinfo *procps_stat_ref (struct procps_statinfo *info);
struct procps_statinfo *procps_stat_unref (struct procps_statinfo *info);
jiff procps_stat_get_cpu (struct procps_statinfo *info, enum procps_cpu_item item);
int procps_stat_get_cpu_chain (struct procps_statinfo *info, struct procps_cpu_result *item);
unsigned int procps_stat_get_sys (struct procps_statinfo *info, enum procps_stat_item item);
int procps_stat_get_sys_chain (struct procps_statinfo *info, struct procps_sys_result *item);
__END_DECLS
#endif