Mercurial > hg > graal-compiler
view src/share/vm/runtime/osThread.hpp @ 6210:1e26f61bbb52 jdk8-b48
Added tag hs24-b16 for changeset 66b0450071c1
author | amurillo |
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date | Fri, 13 Jul 2012 14:06:34 -0700 |
parents | d2a62e0f25eb |
children | bdd155477289 |
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/* * Copyright (c) 1997, 2012, 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_RUNTIME_OSTHREAD_HPP #define SHARE_VM_RUNTIME_OSTHREAD_HPP #include "runtime/frame.hpp" #include "runtime/handles.hpp" #include "runtime/javaFrameAnchor.hpp" #include "runtime/objectMonitor.hpp" #include "utilities/top.hpp" // The OSThread class holds OS-specific thread information. It is equivalent // to the sys_thread_t structure of the classic JVM implementation. // The thread states represented by the ThreadState values are platform-specific // and are likely to be only approximate, because most OSes don't give you access // to precise thread state information. // Note: the ThreadState is legacy code and is not correctly implemented. // Uses of ThreadState need to be replaced by the state in the JavaThread. enum ThreadState { ALLOCATED, // Memory has been allocated but not initialized INITIALIZED, // The thread has been initialized but yet started RUNNABLE, // Has been started and is runnable, but not necessarily running MONITOR_WAIT, // Waiting on a contended monitor lock CONDVAR_WAIT, // Waiting on a condition variable OBJECT_WAIT, // Waiting on an Object.wait() call BREAKPOINTED, // Suspended at breakpoint SLEEPING, // Thread.sleep() ZOMBIE // All done, but not reclaimed yet }; // I'd make OSThread a ValueObj embedded in Thread to avoid an indirection, but // the assembler test in java.cpp expects that it can install the OSThread of // the main thread into its own Thread at will. class OSThread: public CHeapObj<mtThread> { friend class VMStructs; private: OSThreadStartFunc _start_proc; // Thread start routine void* _start_parm; // Thread start routine parameter volatile ThreadState _state; // Thread state *hint* volatile jint _interrupted; // Thread.isInterrupted state // Note: _interrupted must be jint, so that Java intrinsics can access it. // The value stored there must be either 0 or 1. It must be possible // for Java to emulate Thread.currentThread().isInterrupted() by performing // the double indirection Thread::current()->_osthread->_interrupted. // Methods public: void set_state(ThreadState state) { _state = state; } ThreadState get_state() { return _state; } OSThread(OSThreadStartFunc start_proc, void* start_parm); ~OSThread(); // Accessors OSThreadStartFunc start_proc() const { return _start_proc; } void set_start_proc(OSThreadStartFunc start_proc) { _start_proc = start_proc; } void* start_parm() const { return _start_parm; } void set_start_parm(void* start_parm) { _start_parm = start_parm; } volatile bool interrupted() const { return _interrupted != 0; } void set_interrupted(bool z) { _interrupted = z ? 1 : 0; } // Printing void print_on(outputStream* st) const; void print() const { print_on(tty); } // For java intrinsics: static ByteSize interrupted_offset() { return byte_offset_of(OSThread, _interrupted); } // Platform dependent stuff #ifdef TARGET_OS_FAMILY_linux # include "osThread_linux.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "osThread_solaris.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "osThread_windows.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "osThread_bsd.hpp" #endif public: static ByteSize thread_id_offset() { return byte_offset_of(OSThread, _thread_id); } static size_t thread_id_size() { return sizeof(thread_id_t); } thread_id_t thread_id() const { return _thread_id; } void set_thread_id(thread_id_t id) { _thread_id = id; } private: // _thread_id is kernel thread id (similar to LWP id on Solaris). Each // thread has a unique thread_id (BsdThreads or NPTL). It can be used // to access /proc. thread_id_t _thread_id; }; // Utility class for use with condition variables: class OSThreadWaitState : public StackObj { OSThread* _osthread; ThreadState _old_state; public: OSThreadWaitState(OSThread* osthread, bool is_object_wait) { _osthread = osthread; _old_state = osthread->get_state(); if (is_object_wait) { osthread->set_state(OBJECT_WAIT); } else { osthread->set_state(CONDVAR_WAIT); } } ~OSThreadWaitState() { _osthread->set_state(_old_state); } }; // Utility class for use with contended monitors: class OSThreadContendState : public StackObj { OSThread* _osthread; ThreadState _old_state; public: OSThreadContendState(OSThread* osthread) { _osthread = osthread; _old_state = osthread->get_state(); osthread->set_state(MONITOR_WAIT); } ~OSThreadContendState() { _osthread->set_state(_old_state); } }; #endif // SHARE_VM_RUNTIME_OSTHREAD_HPP