1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/utilities/defaultStream.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,97 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP
1.29 +#define SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP
1.30 +
1.31 +#include "utilities/xmlstream.hpp"
1.32 +
1.33 +class defaultStream : public xmlTextStream {
1.34 + friend void ostream_abort();
1.35 + public:
1.36 + enum { NO_WRITER = -1 };
1.37 + private:
1.38 + bool _inited;
1.39 + fileStream* _log_file; // XML-formatted file shared by all threads
1.40 + static int _output_fd;
1.41 + static int _error_fd;
1.42 + static FILE* _output_stream;
1.43 + static FILE* _error_stream;
1.44 +
1.45 + void init();
1.46 + void init_log();
1.47 + void finish_log();
1.48 + void finish_log_on_error(char *buf, int buflen);
1.49 + public:
1.50 + // must defer time stamp due to the fact that os::init() hasn't
1.51 + // yet been called and os::elapsed_counter() may not be valid
1.52 + defaultStream() {
1.53 + _log_file = NULL;
1.54 + _inited = false;
1.55 + _writer = -1;
1.56 + _last_writer = -1;
1.57 + }
1.58 +
1.59 + ~defaultStream() {
1.60 + if (has_log_file()) finish_log();
1.61 + }
1.62 +
1.63 + static inline FILE* output_stream() {
1.64 + return DisplayVMOutputToStderr ? _error_stream : _output_stream;
1.65 + }
1.66 + static inline FILE* error_stream() {
1.67 + return DisplayVMOutputToStdout ? _output_stream : _error_stream;
1.68 + }
1.69 + static inline int output_fd() {
1.70 + return DisplayVMOutputToStderr ? _error_fd : _output_fd;
1.71 + }
1.72 + static inline int error_fd() {
1.73 + return DisplayVMOutputToStdout ? _output_fd : _error_fd;
1.74 + }
1.75 +
1.76 + virtual void write(const char* s, size_t len);
1.77 +
1.78 + void flush() {
1.79 + // once we can determine whether we are in a signal handler, we
1.80 + // should add the following assert here:
1.81 + // assert(xxxxxx, "can not flush buffer inside signal handler");
1.82 + xmlTextStream::flush();
1.83 + fflush(output_stream());
1.84 + if (has_log_file()) _log_file->flush();
1.85 + }
1.86 +
1.87 + // advisory lock/unlock of _writer field:
1.88 + private:
1.89 + intx _writer; // thread_id with current rights to output
1.90 + intx _last_writer;
1.91 + public:
1.92 + intx hold(intx writer_id);
1.93 + void release(intx holder);
1.94 + intx writer() { return _writer; }
1.95 + bool has_log_file();
1.96 +
1.97 + static defaultStream* instance; // sole instance
1.98 +};
1.99 +
1.100 +#endif // SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP
