| /* |
| * Copyright (c) 2003, 2010, 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_UTILITIES_DEFAULTSTREAM_HPP |
| #define SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP |
| |
| #include "utilities/xmlstream.hpp" |
| |
| class defaultStream : public xmlTextStream { |
| friend void ostream_abort(); |
| public: |
| enum { NO_WRITER = -1 }; |
| private: |
| bool _inited; |
| fileStream* _log_file; // XML-formatted file shared by all threads |
| static int _output_fd; |
| static int _error_fd; |
| static FILE* _output_stream; |
| static FILE* _error_stream; |
| |
| void init(); |
| void init_log(); |
| fileStream* open_file(const char* log_name); |
| void start_log(); |
| void finish_log(); |
| void finish_log_on_error(char *buf, int buflen); |
| public: |
| // must defer time stamp due to the fact that os::init() hasn't |
| // yet been called and os::elapsed_counter() may not be valid |
| defaultStream() { |
| _log_file = NULL; |
| _inited = false; |
| _writer = -1; |
| _last_writer = -1; |
| } |
| |
| ~defaultStream() { |
| if (has_log_file()) finish_log(); |
| } |
| |
| static inline FILE* output_stream() { |
| return DisplayVMOutputToStderr ? _error_stream : _output_stream; |
| } |
| static inline FILE* error_stream() { |
| return DisplayVMOutputToStdout ? _output_stream : _error_stream; |
| } |
| static inline int output_fd() { |
| return DisplayVMOutputToStderr ? _error_fd : _output_fd; |
| } |
| static inline int error_fd() { |
| return DisplayVMOutputToStdout ? _output_fd : _error_fd; |
| } |
| |
| virtual void write(const char* s, size_t len); |
| |
| void flush() { |
| // once we can determine whether we are in a signal handler, we |
| // should add the following assert here: |
| // assert(xxxxxx, "can not flush buffer inside signal handler"); |
| xmlTextStream::flush(); |
| fflush(output_stream()); |
| if (has_log_file()) _log_file->flush(); |
| } |
| |
| // advisory lock/unlock of _writer field: |
| private: |
| intx _writer; // thread_id with current rights to output |
| intx _last_writer; |
| public: |
| intx hold(intx writer_id); |
| void release(intx holder); |
| intx writer() { return _writer; } |
| bool has_log_file(); |
| |
| static defaultStream* instance; // sole instance |
| }; |
| |
| #endif // SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP |