инициализировать PMDA для работы как DSO (initialize the PMDA to run as a DSO)
Имя (Name)
pmdaDSO - initialize the PMDA to run as a DSO
Синопсис C (C Synopsis)
#include <pcp/pmapi.h>
#include <pcp/pmda.h>
int pmdaDSO(pmdaInterface *dispatch, int interface, char *name,
char *helptext);
cc ... -lpcp_pmda -lpcp
Описание (Description)
pmdaDSO initializes the pmdaInterface structure to use the
interface extensions, assuming the PMDA(3) is to be run as a DSO.
The pmdaInterface structure is initialized with:
name The name of the agent.
helptext
The default path to the help text (see pmdaText(3)). If
no help text is installed, or you are not using
pmdaText(3), then this should be set to NULL, otherwise
helptext will be copied, so the storage associated with
helptext may be released after the call to pmdaDSO.
The callbacks are initialized to pmdaProfile(3), pmdaFetch(3),
pmdaDesc(3), pmdaText(3), pmdaInstance(3) and pmdaStore(3).
The interface structure also contains the domain of the PMDA(3),
which is defined in the pmcd(1) configuration file. The domain is
used to initialize the metric and instance descriptors (see
pmdaInit(3)).
Предостережение (Caveat)
The PMDA must be using PMDA_INTERFACE_2 or later.
Once pmdaDSO has been called, it is expected that the
pmdaInterface structure pointed to by dispatch will remain
accessible to the routines in libpcp_pmda (not reclaimed off the
stack, not freed or oherwise released, etc.). If the caller
needs to move or relocate the pmdaInterface structure for any
reason, then after the move pmdaInterfaceMoved(3) must be called
to resestablish the internal integrity of the pmdaInterface
structure at the new location before any other routine in
libpcp_pmda is called.
Диагностика (Diagnostic)
Incompatible version of pmcd detected
When pmcd(1) creates the pmdaInterface structure, the
dispatch.comm.version field is set to the highest protocol
that pmcd(1) understands. This message indicates that the
pmcd(1) process does not understand the protocol used by
pmdaDSO.
Unable to allocate memory for pmdaExt structure
In addition, dispatch->status is set to a value less than
zero.
Смотри также (See also)
pmcd(1), PMAPI(3), PMDA(3), pmdaDaemon(3), pmdaInit(3),
pmdaInterfaceMoved(3) and pmdaText(3).
