изменить текущий контекст PMAPI (change current PMAPI context)
Имя (Name)
pmUseContext - change current PMAPI context
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
int pmUseContext(int handle);
cc ... -lpcp
Описание (Description)
An application using the Performance Metrics Application
Programming Interface (PMAPI) may manipulate several concurrent
contexts, each associated with a source of performance metrics,
e.g. pmcd(1) on some host, or an archive log of performance
metrics as created by pmlogger(1).
Calling pmUseContext causes the current PMAPI context to be set
to the context identified by handle. The value of handle must be
one returned from an earlier call to pmNewContext(3) or
pmDupContext(3).
Below the PMAPI, all contexts used by an application are saved in
their most recently modified state, so pmUseContext restores the
context to the state it was in the last time the context was
used, not the state of the context when it was established.
Диагностика (Diagnostic)
PM_ERR_NOCONTEXT
handle does not identify a valid PMAPI context
Смотри также (See also)
PMAPI(3), pmDestroyContext(3), pmDupContext(3), pmNewContext(3)
and pmWhichContext(3).
