Mercurial > hg > truffle
diff src/share/vm/prims/jvmtiRawMonitor.hpp @ 1878:fa83ab460c54
6988353: refactor contended sync subsystem
Summary: reduce complexity by factoring synchronizer.cpp
Reviewed-by: dholmes, never, coleenp
author | acorn |
---|---|
date | Fri, 22 Oct 2010 15:59:34 -0400 |
parents | |
children | f95d63e2154a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/jvmtiRawMonitor.hpp Fri Oct 22 15:59:34 2010 -0400 @@ -0,0 +1,99 @@ +/* + * Copyright (c) 1999, 2007, 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. + * + */ + +// +// class JvmtiRawMonitor +// +// Used by JVMTI methods: All RawMonitor methods (CreateRawMonitor, EnterRawMonitor, etc.) +// +// Wrapper for ObjectMonitor class that saves the Monitor's name +// + +class JvmtiRawMonitor : public ObjectMonitor { +private: + int _magic; + char * _name; + // JVMTI_RM_MAGIC is set in contructor and unset in destructor. + enum { JVMTI_RM_MAGIC = (int)(('T' << 24) | ('I' << 16) | ('R' << 8) | 'M') }; + + int SimpleEnter (Thread * Self) ; + int SimpleExit (Thread * Self) ; + int SimpleWait (Thread * Self, jlong millis) ; + int SimpleNotify (Thread * Self, bool All) ; + +public: + JvmtiRawMonitor(const char *name); + ~JvmtiRawMonitor(); + int raw_enter(TRAPS); + int raw_exit(TRAPS); + int raw_wait(jlong millis, bool interruptable, TRAPS); + int raw_notify(TRAPS); + int raw_notifyAll(TRAPS); + int magic() { return _magic; } + const char *get_name() { return _name; } + bool is_valid(); +}; + +// Onload pending raw monitors +// Class is used to cache onload or onstart monitor enter +// which will transition into real monitor when +// VM is fully initialized. +class JvmtiPendingMonitors : public AllStatic { + +private: + static GrowableArray<JvmtiRawMonitor*> *_monitors; // Cache raw monitor enter + + inline static GrowableArray<JvmtiRawMonitor*>* monitors() { return _monitors; } + + static void dispose() { + delete monitors(); + } + +public: + static void enter(JvmtiRawMonitor *monitor) { + monitors()->append(monitor); + } + + static int count() { + return monitors()->length(); + } + + static void destroy(JvmtiRawMonitor *monitor) { + while (monitors()->contains(monitor)) { + monitors()->remove(monitor); + } + } + + // Return false if monitor is not found in the list. + static bool exit(JvmtiRawMonitor *monitor) { + if (monitors()->contains(monitor)) { + monitors()->remove(monitor); + return true; + } else { + return false; + } + } + + static void transition_raw_monitors(); +};