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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 1.24 by root, Sun Apr 11 17:27:51 2010 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 (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 2002 Mark Wedel & Crossfire Development Team 5 *
6 Copyright (C) 1992 Frank Tore Johansen 6 * Deliantra is free software: you can redistribute it and/or modify it under
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by 7 * the terms of the Affero GNU General Public License as published by the
10 the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
11 (at your option) any later version. 9 * option) any later version.
12 10 *
13 This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details. 14 * GNU General Public License for more details.
17 15 *
18 You should have received a copy of the GNU General Public License 16 * You should have received a copy of the Affero GNU General Public License
19 along with this program; if not, write to the Free Software 17 * and the GNU General Public License along with this program. If not, see
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
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 * 19 *
34 * See include/logger.h for possible logLevels. Messages with llevInfo 20 * The authors can be reached via e-mail to <support@deliantra.net>
35 * and llevError are always printed, regardless of debug mode.
36 */ 21 */
37 22
38void 23#include <cstdarg>
39LOG (LogLevel logLevel, const char *format, ...) 24#include <cstring>
40{
41 if (logLevel <= settings.debug)
42 {
43 char msec[20];
44 char buf[20460];
45 char tbuf[20480];
46 25
26#include <vector>
27
28#include <sys/uio.h>
29#include <pthread.h>
30
31#include "global.h"
32#include "dynbuf.h"
33#include "util.h"
34
35struct logline
36{
47 struct timeval tv; 37 struct timeval tv;
38 char *buf; // includes PREFIX_LEN garbage bytes
39 int len;
40 int flags;
41};
42
43static SMUTEX(mutex);
44static SMUTEX(fdlock);
45static SCOND(cond);
46static int logfd = STDERR_FILENO;
47static int logsync = 1;
48static std::vector<logline, slice_allocator<logline> > queue;
49
50int log_setfd (int fd)
51{
52 SMUTEX_LOCK (fdlock);
53 int old = logfd;
54 logfd = fd < 0 ? STDERR_FILENO : fd;
55 SMUTEX_UNLOCK (fdlock);
56
57 return old;
58}
59
60#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000+") - 1
61
62static void
63log_sync (logline &line)
64{
65 struct tm lt;
66 char pfx [PREFIX_LEN];
67
68 localtime_r (&line.tv.tv_sec, &lt);
69
70 sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d",
71 lt.tm_year + 1900,
72 lt.tm_mon + 1,
73 lt.tm_mday,
74 lt.tm_hour,
75 lt.tm_min,
76 lt.tm_sec,
77 (int)(line.tv.tv_usec / 100)
78 );
79
80 pfx [PREFIX_LEN - 1] = line.flags & logSync ? '=' : ' ';
81
82 struct iovec iov [2];
83
84 iov [0].iov_base = pfx;
85 iov [0].iov_len = PREFIX_LEN;
86
87 char *buf = line.buf;
88
89 if (logsync != 2)
90 SMUTEX_LOCK (fdlock);
91
92 while (char *end = strchr (buf, '\n'))
93 {
94 iov [1].iov_base = buf;
95 iov [1].iov_len = end - buf + 1;
96
97 writev (STDERR_FILENO, iov, 2);
98 if (logfd != STDERR_FILENO)
99 writev (logfd, iov, 2);
100
101 buf = end + 1;
102
103 if (buf == line.buf + line.len)
104 break;
105
106 pfx [PREFIX_LEN - 1] = '+';
107 }
108
109 if (logsync != 2)
110 SMUTEX_UNLOCK (fdlock);
111
112 sfree (line.buf, line.len);
113}
114
115static void *
116logthread_proc (void *arg)
117{
118 int idx = 0;
119
120 for (;;)
121 {
122 logline line;
123
124 SMUTEX_LOCK (mutex);
125
126 while (queue.empty ())
127 SCOND_WAIT (cond, mutex);
128
129 line = queue [idx++];
130
131 // this algorithm could result in an ever-increasing vector
132 // size if we log faster than we can write, but if that happens
133 // we have bigger problems.
134 if (idx == queue.size ())
135 {
136 queue.clear ();
137 idx = 0;
138 }
139
140 SMUTEX_UNLOCK (mutex);
141
142 log_sync (line);
143 }
144}
145
146void
147log_cleanup ()
148{
149 logsync = 1;
150
151 for (;;)
152 {
153 int done;
154
155 SMUTEX_LOCK (mutex);
156 done = queue.empty ();
157 SMUTEX_UNLOCK (mutex);
158
159 if (done)
160 break;
161
162 usleep (10000);
163 SMUTEX_LOCK (fdlock);
164 SMUTEX_UNLOCK (fdlock);
165 }
166}
167
168static void
169af_child ()
170{
171 logsync = 2;
172}
173
174static struct logthread : thread
175{
176 logthread ()
177 {
178 pthread_atfork (0, 0, af_child);
179 start (logthread_proc);
180 logsync = 0;
181 }
182} logthread;
183
184void
185LOG (int flags, const_utf8_string format, ...)
186{
187 int level = flags & 15;
188
189 if (level > settings.debug)
190 return;
191
192 logline line;
48 gettimeofday (&tv, 0); 193 gettimeofday (&line.tv, 0);
49 struct tm *ptime = localtime (&tv.tv_sec);
50 194
51 strftime (tbuf, sizeof (tbuf), "%Y-%m-%d %H:%M:%S", ptime); 195 static dynbuf_text buf;
52 sprintf (msec, ".%03d ", (int)(tv.tv_usec / 1000));
53 196
54 va_list ap; 197 va_list ap;
55 va_start (ap, format); 198 va_start (ap, format);
56 vsnprintf (buf, sizeof (buf), format, ap); 199 buf.vprintf (format, ap);
57 va_end (ap); 200 va_end (ap);
58 201
59 strncat (tbuf, msec, sizeof (tbuf)); 202 buf << '\n';
60 strncat (tbuf, buf, sizeof (tbuf));
61 203
62 fputs (tbuf, logfile); 204 line.buf = buf.linearise ();
63 fputs (tbuf, stderr); 205 line.len = buf.size ();
206
207 if (line.buf [line.len - 2] == '\n')
208 --line.len;
209
210 line.buf = salloc<char> (line.len, line.buf);
211
212 buf.clear ();
213
214 if (logsync)
215 flags |= logSync;
216
217 if (flags & logBacktrace)
64 } 218 {
219 line.buf [line.len - 1] = 0;
220 log_backtrace (line.buf);
221 line.buf [line.len - 1] = '\n';
222 }
223
224 line.flags = flags;
225
226 if (line.flags & logSync)
227 log_sync (line);
228 else
229 {
230 SMUTEX_LOCK (mutex);
231 queue.push_back (line);
232 SMUTEX_UNLOCK (mutex);
233 SCOND_SIGNAL (cond);
234 }
65} 235}
236
237static int suspended;
238
239void
240log_suspend ()
241{
242 if (!suspended++)
243 {
244 LOG (llevDebug, "logging suspended.");
245 SMUTEX_LOCK (fdlock);
246 }
247}
248
249void
250log_resume ()
251{
252 if (!--suspended)
253 {
254 SMUTEX_UNLOCK (fdlock);
255 LOG (llevDebug, "logging resumed.");
256 }
257}
258

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