PAPI_add_event (3)

@par C Interface:
\#include <papi.h> @n
int PAPI_add_event( int  EventSet, int  EventCode );

PAPI_add_event adds one event to a PAPI Event Set. @n
A hardware event can be either a PAPI preset or a native hardware event code.
For a list of PAPI preset events, see PAPI_presets or run the avail test case
in the PAPI distribution. PAPI presets can be passed to PAPI_query_event to see
if they exist on the underlying architecture.
For a list of native events available on current platform, run the papi_native_avail
utility in the PAPI distribution. For the encoding of native events,
see PAPI_event_name_to_code to learn how to generate native code for the
supported native event on the underlying architecture.

@param EventSet
    An integer handle for a PAPI Event Set as created by PAPI_create_eventset.
@param EventCode
    A defined event such as PAPI_TOT_INS.

@retval Positive-Integer
    The number of consecutive elements that succeeded before the error.
@retval PAPI_EINVAL
    One or more of the arguments is invalid.
@retval PAPI_ENOMEM
    Insufficient memory to complete the operation.
@retval PAPI_ENOEVST
    The event set specified does not exist.
@retval PAPI_EISRUN
    The event set is currently counting events.
@retval PAPI_ECNFLCT
    The underlying counter hardware can not count this event and other events
    in the event set simultaneously.
@retval PAPI_ENOEVNT
    The PAPI preset is not available on the underlying hardware.
@retval PAPI_EBUG
    Internal error, please send mail to the developers.

@par Examples:

*   int EventSet = PAPI_NULL;
*   unsigned int native = 0x0;
*   if ( PAPI_create_eventset( &EventSet ) != PAPI_OK )
*   handle_error( 1 );
*   // Add Total Instructions Executed to our EventSet
*   if ( PAPI_add_event( EventSet, PAPI_TOT_INS ) != PAPI_OK )
*   handle_error( 1 );
*   // Add native event PM_CYC to EventSet
*   if ( PAPI_event_name_to_code( "PM_CYC", &native ) != PAPI_OK )
*   handle_error( 1 );
*   if ( PAPI_add_event( EventSet, native ) != PAPI_OK )
*   handle_error( 1 );
*

@see PAPI_cleanup_eventset @n
PAPI_destroy_eventset @n
PAPI_event_code_to_name @n
PAPI_remove_events @n
PAPI_query_event @n
PAPI_presets @n
PAPI_native @n
PAPI_remove_event.fi

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