управляет контекстами, созданными всеми группами (manages contexts created by all groups)
Дубль
(статьи:
qmcsource - управляет контекстами, созданными всеми группами )
Имя (Name)
QmcSource - manages contexts created by all groups
Синопсис C ++ (C++ synopsis)
#include <QmcSource.h>
CC ... -lqmc -lpcp
Описание (Description)
The QmcSource class maintains a unique list of all metric sources
in use to minimize the creation of new contexts (see
pmNewContext(3)) when the context could have been duplicated (see
pmDupContext(3)). This also reduces the duplication of
descriptions of each source.
In general, QMC users should only need to access QmcSource
methods to obtain source descriptions for a QmcContext(3) object.
All context creation by the user should be handled through
QmcGroup(3).
DESTRUCTOR
~QmcSource();
Destructor.
Конструкторы (Constructors)
static QmcSource* getSource(int type, const char* source,
bool matchHosts)
This method will return a QmcSource object that represents a
context of type to source. The QmcSource object may be a new
object if the source has not been previously requested.
Memory management of the QmcSource objects is handled by
QmcSource. If all QmcContext(3)s to the QmcSource have been
deleted, the QmcSource object will also be deleted.
The matchHosts flag controls the algorithm that is used to
match hosts to archives. If matchHosts is equal to false
then no attempt will be made by this method to match a host
context to an existing source context. A QmcSource object
will always be returned in this case, although the
QmcSource::status method may indicate that a context to
source failed.
If matchHosts is equal to true, host contexts will be matched
to a pre-defined archive source collected from that source.
If no archive sources for the source have been previous
specified, getSource will return a NULL pointer.
Диагностика (Diagnostic)
Error messages are generated using pmprintf(3) but are not
flushed. It is the responsibility of the user to call pmflush(3)
to output any messages.
Additional diagnostics may be activated by adding the option pmc
to the global debugging specification, as described in
pmSetDebug(3).
Смотри также (See also)
PMAPI(3), QMC(3), QmcContext(3), QmcGroup(3), pmDupContext(3),
pmflush(3), pmNewContext(3) and pmprintf(3).
