The DCI_SPI_RPC method is used by providers who want Performance Services to establish a communication path between the consumer's address space and the provider's address space in order to call a provider-supplied function within the provider's adddress space to obtain the data information for the metric id registered.

#include <dci.h>

char        *metricidstr;   /*  A metricidstr whose delimeter is first. */
void        *retbuffer;     /*  Return buffer. */
uint32      *userword;
uint32       calltype;      /*  The function call type. */
uint32       datasize;
DCIStatus    Return Value;

Return Value = DCI_SPI_RPCfunctionname(
                metricidstr, retbuffer, userword,
                 calltype, datasize);