Mercurial > hg > truffle
view src/share/vm/gc_implementation/shared/concurrentGCThread.hpp @ 20261:27188ae8bbbb
8035648: Don't use Handle in java_lang_String::print
Reviewed-by: coleenp, pliden
author | stefank |
---|---|
date | Thu, 27 Feb 2014 10:34:55 +0100 |
parents | 581e70386ec9 |
children | 4e4ebe50c8e3 |
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/* * 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