1 /*
   2  * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of
  26 // startup.
  27 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same
  28 // period.   Thread::current() now calls ThreadLocalStorage::thread() directly.
  29 // For SPARC, to avoid excessive register window spill-fill faults,
  30 // we aggressively inline these routines.
  31 
  32 inline Thread* ThreadLocalStorage::thread()  {
  33   // don't use specialized code if +UseMallocOnly -- may confuse Purify et al.
  34   debug_only(if (UseMallocOnly) return get_thread_slow(););
  35 
  36   uintptr_t raw = pd_raw_thread_id();
  37   int ix = pd_cache_index(raw);
  38   Thread *Candidate = ThreadLocalStorage::_get_thread_cache[ix];
  39   if (Candidate->_self_raw_id == raw) {
  40     // hit
  41     return Candidate;
  42   } else {
  43     return ThreadLocalStorage::get_thread_via_cache_slowly(raw, ix);
  44   }
  45 }