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PAPI_set_thr_specific(3) PAPI PAPI_set_thr_specific(3)

NAME

PAPI_set_thr_specific - Store a pointer to a thread specific data structure.

SYNOPSIS

Detailed Description

Prototype:

#include <papi.h>
int PAPI_set_thr_specific( int tag, void *ptr );

Parameters

tag An identifier, the value of which is either PAPI_USR1_TLS or PAPI_USR2_TLS. This identifier indicates which of several data structures associated with this thread is to be accessed.
ptr A pointer to the memory containing the data structure.

Return values

PAPI_OK
PAPI_EINVAL The tag argument is out of range.

In C, PAPI_set_thr_specific will save ptr into an array indexed by tag. There are 2 user available locations and tag can be either PAPI_USR1_TLS or PAPI_USR2_TLS. The array mentioned above is managed by PAPI and allocated to each thread which has called PAPI_thread_init. There is no Fortran equivalent function.

Example:

int ret;
RateInfo *state = NULL;
ret = PAPI_thread_init(pthread_self);
if (ret != PAPI_OK) handle_error(ret);


 
// Do we have the thread specific data setup yet?
ret = PAPI_get_thr_specific(PAPI_USR1_TLS, (void *) &state);
if (ret != PAPI_OK || state == NULL) {


    state = (RateInfo *) malloc(sizeof(RateInfo));


    if (state == NULL) return (PAPI_ESYS);


    memset(state, 0, sizeof(RateInfo));


    state->EventSet = PAPI_NULL;


    ret = PAPI_create_eventset(&state->EventSet);


    if (ret != PAPI_OK) return (PAPI_ESYS);


    ret = PAPI_set_thr_specific(PAPI_USR1_TLS, state);


    if (ret != PAPI_OK) return (ret);
}

See also

PAPI_register_thread PAPI_thread_init PAPI_thread_id PAPI_get_thr_specific

Author

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Fri Nov 17 2023 Version 6.0.0.0