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src/share/vm/utilities/defaultStream.hpp@c18cbe5936b8 (annotated)

src/share/vm/utilities/defaultStream.hpp

Thu, 27 May 2010 19:08:38 -0700

author

trims

date

Thu, 27 May 2010 19:08:38 -0700

changeset 1907

c18cbe5936b8

parent 435

a61af66fc99e

child 2314

f95d63e2154a

permissions

-rw-r--r--

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

duke@435	1	/*
trims@1907	2	* Copyright (c) 2003, 2004, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	class defaultStream : public xmlTextStream {
duke@435	26	friend void ostream_abort();
duke@435	27	public:
duke@435	28	enum { NO_WRITER = -1 };
duke@435	29	private:
duke@435	30	bool _inited;
duke@435	31	fileStream* _log_file; // XML-formatted file shared by all threads
duke@435	32	static int _output_fd;
duke@435	33	static int _error_fd;
duke@435	34	static FILE* _output_stream;
duke@435	35	static FILE* _error_stream;
duke@435	36
duke@435	37	void init();
duke@435	38	void init_log();
duke@435	39	void finish_log();
duke@435	40	void finish_log_on_error(char *buf, int buflen);
duke@435	41	public:
duke@435	42	// must defer time stamp due to the fact that os::init() hasn't
duke@435	43	// yet been called and os::elapsed_counter() may not be valid
duke@435	44	defaultStream() {
duke@435	45	_log_file = NULL;
duke@435	46	_inited = false;
duke@435	47	_writer = -1;
duke@435	48	_last_writer = -1;
duke@435	49	}
duke@435	50
duke@435	51	~defaultStream() {
duke@435	52	if (has_log_file()) finish_log();
duke@435	53	}
duke@435	54
duke@435	55	static inline FILE* output_stream() {
duke@435	56	return DisplayVMOutputToStderr ? _error_stream : _output_stream;
duke@435	57	}
duke@435	58	static inline FILE* error_stream() {
duke@435	59	return DisplayVMOutputToStdout ? _output_stream : _error_stream;
duke@435	60	}
duke@435	61	static inline int output_fd() {
duke@435	62	return DisplayVMOutputToStderr ? _error_fd : _output_fd;
duke@435	63	}
duke@435	64	static inline int error_fd() {
duke@435	65	return DisplayVMOutputToStdout ? _output_fd : _error_fd;
duke@435	66	}
duke@435	67
duke@435	68	virtual void write(const char* s, size_t len);
duke@435	69
duke@435	70	void flush() {
duke@435	71	// once we can determine whether we are in a signal handler, we
duke@435	72	// should add the following assert here:
duke@435	73	// assert(xxxxxx, "can not flush buffer inside signal handler");
duke@435	74	xmlTextStream::flush();
duke@435	75	fflush(output_stream());
duke@435	76	if (has_log_file()) _log_file->flush();
duke@435	77	}
duke@435	78
duke@435	79	// advisory lock/unlock of _writer field:
duke@435	80	private:
duke@435	81	intx _writer; // thread_id with current rights to output
duke@435	82	intx _last_writer;
duke@435	83	public:
duke@435	84	intx hold(intx writer_id);
duke@435	85	void release(intx holder);
duke@435	86	intx writer() { return _writer; }
duke@435	87	bool has_log_file();
duke@435	88
duke@435	89	static defaultStream* instance; // sole instance
duke@435	90	};