jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/concurrentGCThread.hpp@7426d8d76305

8034761: Remove the do_code_roots parameter from process_strong_roots
Reviewed-by: tschatzl, mgerdin, jmasa

     1 /*

     2  * Copyright (c) 2001, 2013, 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  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP

    28 #include "utilities/macros.hpp"

    29 #include "gc_implementation/shared/suspendibleThreadSet.hpp"

    30 #include "runtime/thread.hpp"

    32 class ConcurrentGCThread: public NamedThread {

    33   friend class VMStructs;

    35 protected:

    36   bool _should_terminate;

    37   bool _has_terminated;

    39   enum CGC_flag_type {

    40     CGC_nil           = 0x0,

    41     CGC_dont_suspend  = 0x1,

    42     CGC_CGC_safepoint = 0x2,

    43     CGC_VM_safepoint  = 0x4

    44   };

    46   static int _CGC_flag;

    48   static bool CGC_flag_is_set(int b)       { return (_CGC_flag & b) != 0; }

    49   static int set_CGC_flag(int b)           { return _CGC_flag |= b; }

    50   static int reset_CGC_flag(int b)         { return _CGC_flag &= ~b; }

    52   // Create and start the thread (setting it's priority high.)

    53   void create_and_start();

    55   // Do initialization steps in the thread: record stack base and size,

    56   // init thread local storage, set JNI handle block.

    57   void initialize_in_thread();

    59   // Wait until Universe::is_fully_initialized();

    60   void wait_for_universe_init();

    62   // Record that the current thread is terminating, and will do more

    63   // concurrent work.

    64   void terminate();

    66 public:

    67   // Constructor

    69   ConcurrentGCThread();

    70   ~ConcurrentGCThread() {} // Exists to call NamedThread destructor.

    72   // Tester

    73   bool is_ConcurrentGC_thread() const          { return true;       }

    74 };

    76 // The SurrogateLockerThread is used by concurrent GC threads for

    77 // manipulating Java monitors, in particular, currently for

    78 // manipulating the pending_list_lock. XXX

    79 class SurrogateLockerThread: public JavaThread {

    80   friend class VMStructs;

    81  public:

    82   enum SLT_msg_type {

    83     empty = 0,           // no message

    84     acquirePLL,          // acquire pending list lock

    85     releaseAndNotifyPLL  // notify and release pending list lock

    86   };

    87  private:

    88   // the following are shared with the CMSThread

    89   SLT_msg_type  _buffer;  // communication buffer

    90   Monitor       _monitor; // monitor controlling buffer

    91   BasicLock     _basicLock; // used for PLL locking

    93  public:

    94   static SurrogateLockerThread* make(TRAPS);

    96   SurrogateLockerThread();

    98   bool is_hidden_from_external_view() const     { return true; }

   100   void loop(); // main method

   102   void manipulatePLL(SLT_msg_type msg);

   104 };

   106 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP

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