mirror of
https://github.com/openjdk/jdk.git
synced 2026-02-09 01:48:34 +00:00
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
/*
|
|
* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP
|
|
#define SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP
|
|
|
|
#include "utilities/macros.hpp"
|
|
#include "gc_implementation/shared/suspendibleThreadSet.hpp"
|
|
#include "runtime/thread.hpp"
|
|
|
|
class ConcurrentGCThread: public NamedThread {
|
|
friend class VMStructs;
|
|
|
|
protected:
|
|
bool _should_terminate;
|
|
bool _has_terminated;
|
|
|
|
enum CGC_flag_type {
|
|
CGC_nil = 0x0,
|
|
CGC_dont_suspend = 0x1,
|
|
CGC_CGC_safepoint = 0x2,
|
|
CGC_VM_safepoint = 0x4
|
|
};
|
|
|
|
static int _CGC_flag;
|
|
|
|
static bool CGC_flag_is_set(int b) { return (_CGC_flag & b) != 0; }
|
|
static int set_CGC_flag(int b) { return _CGC_flag |= b; }
|
|
static int reset_CGC_flag(int b) { return _CGC_flag &= ~b; }
|
|
|
|
// Create and start the thread (setting it's priority high.)
|
|
void create_and_start();
|
|
|
|
// Do initialization steps in the thread: record stack base and size,
|
|
// init thread local storage, set JNI handle block.
|
|
void initialize_in_thread();
|
|
|
|
// Wait until Universe::is_fully_initialized();
|
|
void wait_for_universe_init();
|
|
|
|
// Record that the current thread is terminating, and will do more
|
|
// concurrent work.
|
|
void terminate();
|
|
|
|
public:
|
|
// Constructor
|
|
|
|
ConcurrentGCThread();
|
|
~ConcurrentGCThread() {} // Exists to call NamedThread destructor.
|
|
|
|
// Tester
|
|
bool is_ConcurrentGC_thread() const { return true; }
|
|
};
|
|
|
|
// The SurrogateLockerThread is used by concurrent GC threads for
|
|
// manipulating Java monitors, in particular, currently for
|
|
// manipulating the pending_list_lock. XXX
|
|
class SurrogateLockerThread: public JavaThread {
|
|
friend class VMStructs;
|
|
public:
|
|
enum SLT_msg_type {
|
|
empty = 0, // no message
|
|
acquirePLL, // acquire pending list lock
|
|
releaseAndNotifyPLL // notify and release pending list lock
|
|
};
|
|
private:
|
|
// the following are shared with the CMSThread
|
|
SLT_msg_type _buffer; // communication buffer
|
|
Monitor _monitor; // monitor controlling buffer
|
|
BasicLock _basicLock; // used for PLL locking
|
|
|
|
public:
|
|
static SurrogateLockerThread* make(TRAPS);
|
|
|
|
SurrogateLockerThread();
|
|
|
|
bool is_hidden_from_external_view() const { return true; }
|
|
|
|
void loop(); // main method
|
|
|
|
void manipulatePLL(SLT_msg_type msg);
|
|
|
|
};
|
|
|
|
#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_CONCURRENTGCTHREAD_HPP
|