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src/share/vm/runtime/osThread.hpp@c6ff24ceec1c (annotated)

src/share/vm/runtime/osThread.hpp

Thu, 10 Apr 2008 15:49:16 -0400

author

sbohne

date

Thu, 10 Apr 2008 15:49:16 -0400

changeset 528

c6ff24ceec1c

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6686407: Fix for 6666698 broke -XX:BiasedLockingStartupDelay=0
Summary: Stack allocated VM_EnableBiasedLocking op must be marked as such
Reviewed-by: xlu, acorn, never, dholmes

duke@435	1	/*
duke@435	2	* Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// The OSThread class holds OS-specific thread information. It is equivalent
duke@435	26	// to the sys_thread_t structure of the classic JVM implementation.
duke@435	27
duke@435	28	// The thread states represented by the ThreadState values are platform-specific
duke@435	29	// and are likely to be only approximate, because most OSes don't give you access
duke@435	30	// to precise thread state information.
duke@435	31
duke@435	32	// Note: the ThreadState is legacy code and is not correctly implemented.
duke@435	33	// Uses of ThreadState need to be replaced by the state in the JavaThread.
duke@435	34
duke@435	35	enum ThreadState {
duke@435	36	ALLOCATED, // Memory has been allocated but not initialized
duke@435	37	INITIALIZED, // The thread has been initialized but yet started
duke@435	38	RUNNABLE, // Has been started and is runnable, but not necessarily running
duke@435	39	MONITOR_WAIT, // Waiting on a contended monitor lock
duke@435	40	CONDVAR_WAIT, // Waiting on a condition variable
duke@435	41	OBJECT_WAIT, // Waiting on an Object.wait() call
duke@435	42	BREAKPOINTED, // Suspended at breakpoint
duke@435	43	SLEEPING, // Thread.sleep()
duke@435	44	ZOMBIE // All done, but not reclaimed yet
duke@435	45	};
duke@435	46
duke@435	47	// I'd make OSThread a ValueObj embedded in Thread to avoid an indirection, but
duke@435	48	// the assembler test in java.cpp expects that it can install the OSThread of
duke@435	49	// the main thread into its own Thread at will.
duke@435	50
duke@435	51
duke@435	52	class OSThread: public CHeapObj {
duke@435	53	friend class VMStructs;
duke@435	54	private:
duke@435	55	//void* _start_proc; // Thread start routine
duke@435	56	OSThreadStartFunc _start_proc; // Thread start routine
duke@435	57	void* _start_parm; // Thread start routine parameter
duke@435	58	volatile ThreadState _state; // Thread state *hint*
duke@435	59	jint _interrupted; // Thread.isInterrupted state
duke@435	60
duke@435	61	// Note: _interrupted must be jint, so that Java intrinsics can access it.
duke@435	62	// The value stored there must be either 0 or 1. It must be possible
duke@435	63	// for Java to emulate Thread.currentThread().isInterrupted() by performing
duke@435	64	// the double indirection Thread::current()->_osthread->_interrupted.
duke@435	65
duke@435	66	// Methods
duke@435	67	public:
duke@435	68	void set_state(ThreadState state) { _state = state; }
duke@435	69	ThreadState get_state() { return _state; }
duke@435	70
duke@435	71	// Constructor
duke@435	72	OSThread(OSThreadStartFunc start_proc, void* start_parm);
duke@435	73
duke@435	74	// Destructor
duke@435	75	~OSThread();
duke@435	76
duke@435	77	// Accessors
duke@435	78	OSThreadStartFunc start_proc() const { return _start_proc; }
duke@435	79	void set_start_proc(OSThreadStartFunc start_proc) { _start_proc = start_proc; }
duke@435	80	void* start_parm() const { return _start_parm; }
duke@435	81	void set_start_parm(void* start_parm) { _start_parm = start_parm; }
duke@435	82
duke@435	83	bool interrupted() const { return _interrupted != 0; }
duke@435	84	void set_interrupted(bool z) { _interrupted = z ? 1 : 0; }
duke@435	85
duke@435	86	// Printing
duke@435	87	void print_on(outputStream* st) const;
duke@435	88	void print() const { print_on(tty); }
duke@435	89
duke@435	90	// For java intrinsics:
duke@435	91	static ByteSize interrupted_offset() { return byte_offset_of(OSThread, _interrupted); }
duke@435	92
duke@435	93	// Platform dependent stuff
duke@435	94	#include "incls/_osThread_pd.hpp.incl"
duke@435	95	};
duke@435	96
duke@435	97
duke@435	98	// Utility class for use with condition variables:
duke@435	99	class OSThreadWaitState : public StackObj {
duke@435	100	OSThread* _osthread;
duke@435	101	ThreadState _old_state;
duke@435	102	public:
duke@435	103	OSThreadWaitState(OSThread* osthread, bool is_object_wait) {
duke@435	104	_osthread = osthread;
duke@435	105	_old_state = osthread->get_state();
duke@435	106	if (is_object_wait) {
duke@435	107	osthread->set_state(OBJECT_WAIT);
duke@435	108	} else {
duke@435	109	osthread->set_state(CONDVAR_WAIT);
duke@435	110	}
duke@435	111	}
duke@435	112	~OSThreadWaitState() {
duke@435	113	_osthread->set_state(_old_state);
duke@435	114	}
duke@435	115	};
duke@435	116
duke@435	117
duke@435	118	// Utility class for use with contended monitors:
duke@435	119	class OSThreadContendState : public StackObj {
duke@435	120	OSThread* _osthread;
duke@435	121	ThreadState _old_state;
duke@435	122	public:
duke@435	123	OSThreadContendState(OSThread* osthread) {
duke@435	124	_osthread = osthread;
duke@435	125	_old_state = osthread->get_state();
duke@435	126	osthread->set_state(MONITOR_WAIT);
duke@435	127	}
duke@435	128	~OSThreadContendState() {
duke@435	129	_osthread->set_state(_old_state);
duke@435	130	}
duke@435	131	};