CentOS 7.0 - man page for papi_thread_init (centos section 3)

PAPI_thread_init(3)			       PAPI			      PAPI_thread_init(3)

NAME
       PAPI_thread_init -

       Initialize thread support in the PAPI library.

SYNOPSIS
Detailed Description
       @param *id_fn
	   Pointer to a function that returns current thread ID.

       PAPI_thread_init initializes thread support in the PAPI library.
       Applications that make no use of threads do not need to call this routine.
       This function MUST return a UNIQUE thread ID for every new thread/LWP created.
       The OpenMP call omp_get_thread_num() violates this rule, as the underlying
       LWPs may have been killed off by the run-time system or by a call to omp_set_num_threads() .
       In that case, it may still possible to use omp_get_thread_num() in
       conjunction with PAPI_unregister_thread() when the OpenMP thread has finished.
       However it is much better to use the underlying thread subsystem's call,
       which is pthread_self() on Linux platforms.

       if ( PAPI_thread_init(pthread_self) != PAPI_OK )
	   exit(1);
	*

       See Also:
	   PAPI_register_thread PAPI_unregister_thread PAPI_get_thr_specific
	   PAPI_set_thr_specific PAPI_thread_id PAPI_list_threads

Author
       Generated automatically by Doxygen for PAPI from the source code.

Version 5.2.0.0 			 Tue Jun 17 2014		      PAPI_thread_init(3)