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Comparing deliantra/server/common/logger.C (file contents):
Revision 1.10 by root, Mon Jan 8 23:36:15 2007 UTC vs.
Revision 1.19 by root, Tue May 6 16:55:25 2008 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 3 *
4 Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 2002 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 7 *
8 This program is free software; you can redistribute it and/or modify 8 * Deliantra is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by 9 * it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version. 11 * (at your option) any later version.
12 12 *
13 This program is distributed in the hope that it will be useful, 13 * This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details. 16 * GNU General Public License for more details.
17 17 *
18 You should have received a copy of the GNU General Public License 18 * You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22 The authors can be reached via e-mail at <crossfire@schmorp.de>
23*/
24
25#include <stdarg.h>
26#include <global.h>
27#include <funcpoint.h>
28
29/*
30 * Logs a message to stderr, or to file, and/or even to socket.
31 * Or discards the message if it is of no importanse, and none have
32 * asked to hear messages of that logLevel.
33 * 20 *
34 * See include/logger.h for possible logLevels. Messages with llevInfo 21 * The authors can be reached via e-mail to <support@deliantra.net>
35 * and llevError are always printed, regardless of debug mode.
36 */ 22 */
37 23
24#include <cstdarg>
25#include <cstring>
26
27#include <vector>
28
29#include <sys/uio.h>
30#include <pthread.h>
31
32#include "global.h"
33#include "dynbuf.h"
34#include "util.h"
35
36struct logline
37{
38 struct timeval tv;
39 char *buf; // includes PREFIX_LEN garbage bytes
40 int len;
41 int flags;
42};
43
44static SMUTEX(mutex);
45static SCOND(cond);
46static int logfd = STDERR_FILENO;
47static int logsync = 1;
48static std::vector<logline, slice_allocator<logline> > queue;
49
50void set_logfd (int fd)
51{
52 SMUTEX_LOCK (mutex);
53 logfd = fd < 0 ? STDERR_FILENO : fd;
54 SMUTEX_UNLOCK (mutex);
55}
56
57#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000+") - 1
58
59static void
60log_sync (logline &line)
61{
62 struct tm lt;
63 char pfx [PREFIX_LEN];
64
65 localtime_r (&line.tv.tv_sec, &lt);
66
67 sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d",
68 lt.tm_year + 1900,
69 lt.tm_mon + 1,
70 lt.tm_mday,
71 lt.tm_hour,
72 lt.tm_min,
73 lt.tm_sec,
74 (int)(line.tv.tv_usec / 100)
75 );
76
77 pfx [PREFIX_LEN - 1] = line.flags & logSync ? '=' : ' ';
78
79 struct iovec iov [2];
80
81 iov [0].iov_base = pfx;
82 iov [0].iov_len = PREFIX_LEN;
83
84 char *buf = line.buf;
85
86 while (char *end = strchr (buf, '\n'))
87 {
88 iov [1].iov_base = buf;
89 iov [1].iov_len = end - buf + 1;
90
91 writev (STDERR_FILENO, iov, 2);
92 if (logfd != STDERR_FILENO)
93 writev (logfd, iov, 2);
94
95 buf = end + 1;
96
97 if (buf == line.buf + line.len)
98 break;
99
100 pfx [PREFIX_LEN - 1] = '+';
101 }
102
103 sfree (line.buf, line.len);
104}
105
106static void *
107logthread_proc (void *arg)
108{
109 int idx = 0;
110
111 for (;;)
112 {
113 logline line;
114
115 SMUTEX_LOCK (mutex);
116
117 while (queue.empty ())
118 SCOND_WAIT (cond, mutex);
119
120 line = queue [idx++];
121
122 // this algorithm could result in an ever-increasing vector
123 // size if we log faster than we can write, but if that happens
124 // we have bigger problems.
125 if (idx == queue.size ())
126 {
127 queue.clear ();
128 idx = 0;
129 }
130
131 SMUTEX_UNLOCK (mutex);
132
133 log_sync (line);
134 }
135}
136
38void 137void
39LOG (LogLevel logLevel, const char *format, ...) 138log_cleanup ()
40{ 139{
140 logsync = 1;
141
142 for (;;)
143 {
144 int done;
145
146 SMUTEX_LOCK (mutex);
147 done = queue.empty ();
148 SMUTEX_UNLOCK (mutex);
149
150 if (done)
151 break;
152
153 usleep (10000);
154 }
155}
156
157static void
158af_child ()
159{
160 logsync = 1;
161}
162
163static struct logthread : thread
164{
165 logthread ()
166 {
167 pthread_atfork (0, 0, af_child);
168 start (logthread_proc);
169 logsync = 0;
170 }
171} logthread;
172
173void
174LOG (int flags, const char *format, ...)
175{
176 int level = flags & 15;
177
41 if (logLevel <= settings.debug) 178 if (level > settings.debug)
42 { 179 return;
43 char msec[20];
44 char buf[20460];
45 char tbuf[20480];
46 180
47 struct timeval tv; 181 logline line;
48 gettimeofday (&tv, 0); 182 gettimeofday (&line.tv, 0);
49 struct tm *ptime = localtime (&tv.tv_sec);
50 183
51 strftime (tbuf, sizeof (tbuf), "%Y-%m-%d %H:%M:%S", ptime); 184 static dynbuf_text buf;
52 sprintf (msec, ".%03d ", (int)(tv.tv_usec / 1000));
53 185
54 va_list ap; 186 va_list ap;
55 va_start (ap, format); 187 va_start (ap, format);
56 vsnprintf (buf, sizeof (buf), format, ap); 188 buf.vprintf (format, ap);
57 va_end (ap); 189 va_end (ap);
58 190
59 strncat (tbuf, msec, sizeof (tbuf)); 191 buf << '\n';
60 strncat (tbuf, buf, sizeof (tbuf));
61 192
62 fputs (tbuf, logfile); 193 line.buf = buf.linearise ();
63 fputs (tbuf, stderr); 194 line.len = buf.size ();
195
196 if (line.buf [line.len - 2] == '\n')
197 --line.len;
198
199 line.buf = salloc<char> (line.len, line.buf);
200
201 buf.clear ();
202
203 if (logsync)
204 flags |= logSync;
205
206 if (flags & logBacktrace)
64 } 207 {
208 line.buf [line.len - 1] = 0;
209 log_backtrace (line.buf);
210 line.buf [line.len - 1] = '\n';
211 }
212
213 line.flags = flags;
214
215 if (line.flags & logSync)
216 log_sync (line);
217 else
218 {
219 SMUTEX_LOCK (mutex);
220 queue.push_back (line);
221 SMUTEX_UNLOCK (mutex);
222 SCOND_SIGNAL (cond);
223 }
65} 224}
225

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