1 /*
   2  * Copyright (c) 1998, 2010, 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/handles.inline.hpp"
  27 #include "runtime/mutexLocker.hpp"
  28 #include "runtime/os.hpp"
  29 #include "runtime/osThread.hpp"
  30 #include "runtime/safepoint.hpp"
  31 #include "runtime/vmThread.hpp"
  32 
  33 void OSThread::pd_initialize() {
  34   set_thread_handle(NULL);
  35   set_thread_id(NULL);
  36   set_interrupt_event(NULL);
  37 }
  38 
  39 // TODO: this is not well encapsulated; creation and deletion of the
  40 // interrupt_event are done in os_win32.cpp, create_thread and
  41 // free_thread. Should follow pattern of Linux/Solaris code here.
  42 void OSThread::pd_destroy() {





























  43 }

   1 /*
   2  * Copyright (c) 1998, 2019, 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/orderAccess.hpp"

  27 #include "runtime/os.hpp"
  28 #include "runtime/osThread.hpp"


  29 
  30 void OSThread::pd_initialize() {
  31   set_thread_handle(NULL);
  32   set_thread_id(NULL);
  33   set_interrupt_event(NULL);
  34 }
  35 



  36 void OSThread::pd_destroy() {
  37   if (_interrupt_event != NULL) {
  38     CloseHandle(_interrupt_event);
  39   }
  40 }
  41 
  42 // We need to specialize these to interact with the _interrupt_event.
  43 
  44 volatile bool OSThread::interrupted() {
  45   return _interrupted != 0 &&
  46     (WaitForSingleObject(_interrupt_event, 0) == WAIT_OBJECT_0);
  47 }
  48 
  49 void OSThread::set_interrupted(bool z) {
  50   if (z) {
  51     _interrupted = 1;
  52     // More than one thread can get here with the same value of osthread,
  53     // resulting in multiple notifications.  We do, however, want the store
  54     // to interrupted() to be visible to other threads before we post
  55     // the interrupt event.
  56     OrderAccess::release();
  57     SetEvent(_interrupt_event);
  58   }
  59   else {
  60     // We should only ever clear the interrupt if we are in fact interrupted,
  61     // and this can only be done by the current thread on itself.
  62     assert(_interrupted == 1, "invariant for clearing interrupt state");
  63     _interrupted = 0;
  64     ResetEvent(_interrupt_event);
  65   }
  66 }