PAPI_get_thr_specific(3) Retrieve a pointer to a thread specific data structure.


Detailed Description

@par Prototype:
    #include <papi.h> @n
    int PAPI_get_thr_specific( int tag, void **ptr );
@param 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.
@param ptr
    A pointer to the memory containing the data structure. 
@retval PAPI_OK
@retval PAPI_EINVAL 
    The @em tag argument is out of range. 
In C, PAPI_get_thr_specific PAPI_get_thr_specific will retrieve the pointer from the array with index @em tag. 
There are 2 user available locations and @em tag can be either 
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. 
@par Example:


 int ret;
 HighLevelInfo *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 = (HighLevelInfo *) malloc(sizeof(HighLevelInfo));
    if (state == NULL) return (PAPI_ESYS);
    memset(state, 0, sizeof(HighLevelInfo));
    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_set_thr_specific


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