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comparison: src/share/vm/utilities/defaultStream.hpp
src/share/vm/utilities/defaultStream.hpp
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| 1 /* | |
| 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP | |
| 26 #define SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP | |
| 27 | |
| 28 #include "utilities/xmlstream.hpp" | |
| 29 | |
| 30 class defaultStream : public xmlTextStream { | |
| 31 friend void ostream_abort(); | |
| 32 public: | |
| 33 enum { NO_WRITER = -1 }; | |
| 34 private: | |
| 35 bool _inited; | |
| 36 fileStream* _log_file; // XML-formatted file shared by all threads | |
| 37 static int _output_fd; | |
| 38 static int _error_fd; | |
| 39 static FILE* _output_stream; | |
| 40 static FILE* _error_stream; | |
| 41 | |
| 42 void init(); | |
| 43 void init_log(); | |
| 44 void finish_log(); | |
| 45 void finish_log_on_error(char *buf, int buflen); | |
| 46 public: | |
| 47 // must defer time stamp due to the fact that os::init() hasn't | |
| 48 // yet been called and os::elapsed_counter() may not be valid | |
| 49 defaultStream() { | |
| 50 _log_file = NULL; | |
| 51 _inited = false; | |
| 52 _writer = -1; | |
| 53 _last_writer = -1; | |
| 54 } | |
| 55 | |
| 56 ~defaultStream() { | |
| 57 if (has_log_file()) finish_log(); | |
| 58 } | |
| 59 | |
| 60 static inline FILE* output_stream() { | |
| 61 return DisplayVMOutputToStderr ? _error_stream : _output_stream; | |
| 62 } | |
| 63 static inline FILE* error_stream() { | |
| 64 return DisplayVMOutputToStdout ? _output_stream : _error_stream; | |
| 65 } | |
| 66 static inline int output_fd() { | |
| 67 return DisplayVMOutputToStderr ? _error_fd : _output_fd; | |
| 68 } | |
| 69 static inline int error_fd() { | |
| 70 return DisplayVMOutputToStdout ? _output_fd : _error_fd; | |
| 71 } | |
| 72 | |
| 73 virtual void write(const char* s, size_t len); | |
| 74 | |
| 75 void flush() { | |
| 76 // once we can determine whether we are in a signal handler, we | |
| 77 // should add the following assert here: | |
| 78 // assert(xxxxxx, "can not flush buffer inside signal handler"); | |
| 79 xmlTextStream::flush(); | |
| 80 fflush(output_stream()); | |
| 81 if (has_log_file()) _log_file->flush(); | |
| 82 } | |
| 83 | |
| 84 // advisory lock/unlock of _writer field: | |
| 85 private: | |
| 86 intx _writer; // thread_id with current rights to output | |
| 87 intx _last_writer; | |
| 88 public: | |
| 89 intx hold(intx writer_id); | |
| 90 void release(intx holder); | |
| 91 intx writer() { return _writer; } | |
| 92 bool has_log_file(); | |
| 93 | |
| 94 static defaultStream* instance; // sole instance | |
| 95 }; | |
| 96 | |
| 97 #endif // SHARE_VM_UTILITIES_DEFAULTSTREAM_HPP |
