1 /*
   2  * Copyright (c) 1998, 2014, 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 // no precompiled headers
  26 #include "runtime/atomic.hpp"
  27 #include "runtime/handles.inline.hpp"
  28 #include "runtime/mutexLocker.hpp"
  29 #include "runtime/os.hpp"
  30 #include "runtime/osThread.hpp"
  31 #include "runtime/safepoint.hpp"
  32 #include "runtime/vmThread.hpp"
  33 
  34 #include <signal.h>
  35 
  36  // ***************************************************************
  37  // Platform dependent initialization and cleanup
  38  // ***************************************************************
  39 
  40 void OSThread::pd_initialize() {
  41   _thread_id                         = 0;
  42   sigemptyset(&_caller_sigmask);
  43 
  44   _vm_created_thread                 = false;
  45 }
  46 
  47 void OSThread::pd_destroy() {
  48 }
  49 
  50 // copied from synchronizer.cpp
  51 
  52 void OSThread::handle_spinlock_contention(int tries) {
  53   if (NoYieldsInMicrolock) return;
  54 
  55   if (tries > 10) {
  56     os::yield_all(tries); // Yield to threads of any priority
  57   } else if (tries > 5) {
  58     os::yield();          // Yield to threads of same or higher priority
  59   }
  60 }
  61 
  62 void OSThread::SR_handler(Thread* thread, ucontext_t* uc) {
  63   os::Solaris::SR_handler(thread, uc);
  64 }