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1 /*
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2 * Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class defaultStream : public xmlTextStream {
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26 friend void ostream_abort();
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27 public:
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28 enum { NO_WRITER = -1 };
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29 private:
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30 bool _inited;
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31 fileStream* _log_file; // XML-formatted file shared by all threads
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32 static int _output_fd;
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33 static int _error_fd;
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34 static FILE* _output_stream;
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35 static FILE* _error_stream;
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36
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37 void init();
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38 void init_log();
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39 void finish_log();
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40 void finish_log_on_error(char *buf, int buflen);
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41 public:
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42 // must defer time stamp due to the fact that os::init() hasn't
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43 // yet been called and os::elapsed_counter() may not be valid
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44 defaultStream() {
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45 _log_file = NULL;
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46 _inited = false;
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47 _writer = -1;
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48 _last_writer = -1;
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49 }
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50
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51 ~defaultStream() {
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52 if (has_log_file()) finish_log();
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53 }
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54
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55 static inline FILE* output_stream() {
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56 return DisplayVMOutputToStderr ? _error_stream : _output_stream;
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57 }
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58 static inline FILE* error_stream() {
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59 return DisplayVMOutputToStdout ? _output_stream : _error_stream;
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60 }
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61 static inline int output_fd() {
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62 return DisplayVMOutputToStderr ? _error_fd : _output_fd;
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63 }
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64 static inline int error_fd() {
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65 return DisplayVMOutputToStdout ? _output_fd : _error_fd;
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66 }
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67
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68 virtual void write(const char* s, size_t len);
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69
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70 void flush() {
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71 // once we can determine whether we are in a signal handler, we
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72 // should add the following assert here:
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73 // assert(xxxxxx, "can not flush buffer inside signal handler");
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74 xmlTextStream::flush();
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75 fflush(output_stream());
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76 if (has_log_file()) _log_file->flush();
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77 }
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78
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79 // advisory lock/unlock of _writer field:
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80 private:
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81 intx _writer; // thread_id with current rights to output
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82 intx _last_writer;
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83 public:
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84 intx hold(intx writer_id);
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85 void release(intx holder);
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86 intx writer() { return _writer; }
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87 bool has_log_file();
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88
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89 static defaultStream* instance; // sole instance
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90 };
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