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src/hotspot/share/gc/z/zLock.hpp

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   1 /*
   2  * Copyright (c) 2015, 2018, 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 #ifndef SHARE_GC_Z_ZLOCK_HPP
  25 #define SHARE_GC_Z_ZLOCK_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include <pthread.h>
  29 
  30 class ZLock {
  31 private:
  32   pthread_mutex_t _lock;
  33 
  34 public:
  35   ZLock();
  36   ~ZLock();
  37 
  38   void lock();
  39   bool try_lock();
  40   void unlock();
  41 };
  42 
  43 class ZReentrantLock {
  44 private:
  45   ZLock            _lock;
  46   Thread* volatile _owner;
  47   uint64_t         _count;
  48 
  49 public:
  50   ZReentrantLock();
  51 
  52   void lock();
  53   void unlock();
  54 
  55   bool is_owned() const;
  56 };
  57 
   1 /*
   2  * Copyright (c) 2015, 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 #ifndef SHARE_GC_Z_ZLOCK_HPP
  25 #define SHARE_GC_Z_ZLOCK_HPP
  26 
  27 #include "memory/allocation.hpp"
  28 #include "runtime/os.hpp"
  29 
  30 class ZLock {
  31 private:
  32   os::PlatformMutex _lock;
  33 
  34 public:



  35   void lock();
  36   bool try_lock();
  37   void unlock();
  38 };
  39 
  40 class ZReentrantLock {
  41 private:
  42   ZLock            _lock;
  43   Thread* volatile _owner;
  44   uint64_t         _count;
  45 
  46 public:
  47   ZReentrantLock();
  48 
  49   void lock();
  50   void unlock();
  51 
  52   bool is_owned() const;
  53 };
  54 
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