src/os/windows/vm/threadCritical_windows.cpp

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   1 /*
   2  * Copyright (c) 2001, 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 # include "incls/_precompiled.incl"
  26 # include "incls/_threadCritical_windows.cpp.incl"

  27 
  28 // OS-includes here
  29 # include <windows.h>
  30 # include <winbase.h>
  31 
  32 //
  33 // See threadCritical.hpp for details of this class.
  34 //
  35 
  36 static bool initialized = false;
  37 static volatile jint lock_count = -1;
  38 static HANDLE lock_event;
  39 static DWORD lock_owner = -1;
  40 
  41 //
  42 // Note that Microsoft's critical region code contains a race
  43 // condition, and is not suitable for use. A thread holding the
  44 // critical section cannot safely suspend a thread attempting
  45 // to enter the critical region. The failure mode is that both
  46 // threads are permanently suspended.


   1 /*
   2  * Copyright (c) 2001, 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 #include "precompiled.hpp"
  26 #include "runtime/threadCritical.hpp"
  27 #include "thread_windows.inline.hpp"
  28 
  29 // OS-includes here
  30 # include <windows.h>
  31 # include <winbase.h>
  32 
  33 //
  34 // See threadCritical.hpp for details of this class.
  35 //
  36 
  37 static bool initialized = false;
  38 static volatile jint lock_count = -1;
  39 static HANDLE lock_event;
  40 static DWORD lock_owner = -1;
  41 
  42 //
  43 // Note that Microsoft's critical region code contains a race
  44 // condition, and is not suitable for use. A thread holding the
  45 // critical section cannot safely suspend a thread attempting
  46 // to enter the critical region. The failure mode is that both
  47 // threads are permanently suspended.