[OMPT] Use more general function for getting gtid

[omalyshe]

Summary

Instead of using kmp_gtid_get_specific() which always makes function call (pthread_getspecific() or TlsGetValue()) it's better to use kmp_get_gtid() like it is done in __ompt_get_thread_id_internal(). The gtid value from the static TLS will be used, for example, in case of Linux where this method of getting gtid is default.

[jmellorcrummey]

The fix looks good, but the file should have a full diff. Please update with a diff that includes the whole file instead of just the change.

[omalyshe]

The full diff attached.

[Hahnfeld]

I agree with John, LGTM

[AndreyChurbanov]

committed rev. 270694

runtime/src/ompt-specific.h

 {
     return (gtid >= 0) ? __kmp_thread_from_gtid(gtid) : NULL;
 }
 
 
 inline ompt_thread_t *
 ompt_get_thread()
 {
-    int gtid = __kmp_gtid_get_specific();
+    int gtid = __kmp_get_gtid();
     return ompt_get_thread_gtid(gtid);
 }
 
 
 inline void
 ompt_set_thread_state(ompt_thread_t *thread, ompt_state_t state)
 {
     thread->th.ompt_thread_info.state = state;