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Comparing deliantra/server/common/logger.C (file contents):
Revision 1.16 by root, Thu Nov 8 19:43:23 2007 UTC vs.
Revision 1.20 by root, Mon Oct 12 14:00:57 2009 UTC

1/* 1/*
2 * This file is part of Deliantra, the Roguelike Realtime MMORPG. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 7 *
8 * Deliantra is free software: you can redistribute it and/or modify 8 * Deliantra is free software: you can redistribute it and/or modify it under
9 * it under the terms of the GNU General Public License as published by 9 * the terms of the Affero GNU General Public License as published by the
10 * the Free Software Foundation, either version 3 of the License, or 10 * Free Software Foundation, either version 3 of the License, or (at your
11 * (at your option) any later version. 11 * 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 Affero GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>. 19 * and the GNU General Public License along with this program. If not, see
20 * <http://www.gnu.org/licenses/>.
20 * 21 *
21 * The authors can be reached via e-mail to <support@deliantra.net> 22 * The authors can be reached via e-mail to <support@deliantra.net>
22 */ 23 */
23 24
24#include <cstdarg> 25#include <cstdarg>
26#include <cstring>
27
28#include <vector>
29
30#include <sys/uio.h>
31#include <pthread.h>
32
25#include <global.h> 33#include "global.h"
26#include <funcpoint.h> 34#include "dynbuf.h"
35#include "util.h"
36
37struct logline
38{
39 struct timeval tv;
40 char *buf; // includes PREFIX_LEN garbage bytes
41 int len;
42 int flags;
43};
44
45static SMUTEX(mutex);
46static SCOND(cond);
47static int logfd = STDERR_FILENO;
48static int logsync = 1;
49static std::vector<logline, slice_allocator<logline> > queue;
50
51void set_logfd (int fd)
52{
53 SMUTEX_LOCK (mutex);
54 logfd = fd < 0 ? STDERR_FILENO : fd;
55 SMUTEX_UNLOCK (mutex);
56}
57
58#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000+") - 1
59
60static void
61log_sync (logline &line)
62{
63 struct tm lt;
64 char pfx [PREFIX_LEN];
65
66 localtime_r (&line.tv.tv_sec, &lt);
67
68 sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d",
69 lt.tm_year + 1900,
70 lt.tm_mon + 1,
71 lt.tm_mday,
72 lt.tm_hour,
73 lt.tm_min,
74 lt.tm_sec,
75 (int)(line.tv.tv_usec / 100)
76 );
77
78 pfx [PREFIX_LEN - 1] = line.flags & logSync ? '=' : ' ';
79
80 struct iovec iov [2];
81
82 iov [0].iov_base = pfx;
83 iov [0].iov_len = PREFIX_LEN;
84
85 char *buf = line.buf;
86
87 while (char *end = strchr (buf, '\n'))
88 {
89 iov [1].iov_base = buf;
90 iov [1].iov_len = end - buf + 1;
91
92 writev (STDERR_FILENO, iov, 2);
93 if (logfd != STDERR_FILENO)
94 writev (logfd, iov, 2);
95
96 buf = end + 1;
97
98 if (buf == line.buf + line.len)
99 break;
100
101 pfx [PREFIX_LEN - 1] = '+';
102 }
103
104 sfree (line.buf, line.len);
105}
106
107static void *
108logthread_proc (void *arg)
109{
110 int idx = 0;
111
112 for (;;)
113 {
114 logline line;
115
116 SMUTEX_LOCK (mutex);
117
118 while (queue.empty ())
119 SCOND_WAIT (cond, mutex);
120
121 line = queue [idx++];
122
123 // this algorithm could result in an ever-increasing vector
124 // size if we log faster than we can write, but if that happens
125 // we have bigger problems.
126 if (idx == queue.size ())
127 {
128 queue.clear ();
129 idx = 0;
130 }
131
132 SMUTEX_UNLOCK (mutex);
133
134 log_sync (line);
135 }
136}
137
138void
139log_cleanup ()
140{
141 logsync = 1;
142
143 for (;;)
144 {
145 int done;
146
147 SMUTEX_LOCK (mutex);
148 done = queue.empty ();
149 SMUTEX_UNLOCK (mutex);
150
151 if (done)
152 break;
153
154 usleep (10000);
155 }
156}
157
158static void
159af_child ()
160{
161 logsync = 1;
162}
163
164static struct logthread : thread
165{
166 logthread ()
167 {
168 pthread_atfork (0, 0, af_child);
169 start (logthread_proc);
170 logsync = 0;
171 }
172} logthread;
27 173
28void 174void
29LOG (int flags, const char *format, ...) 175LOG (int flags, const char *format, ...)
30{ 176{
31 int level = flags & 15; 177 int level = flags & 15;
32 178
33 if (level > settings.debug) 179 if (level > settings.debug)
34 return; 180 return;
35 181
36 char buf[20480]; 182 logline line;
37
38 struct timeval tv;
39 gettimeofday (&tv, 0); 183 gettimeofday (&line.tv, 0);
40 struct tm *ptime = localtime (&tv.tv_sec);
41 184
42 int len = strftime (buf, sizeof (buf) - 7, "%Y-%m-%d %H:%M:%S", ptime); 185 static dynbuf_text buf;
43 len += sprintf (buf + len, ".%04d ", (int)(tv.tv_usec / 100));
44 186
45 va_list ap; 187 va_list ap;
46 va_start (ap, format); 188 va_start (ap, format);
47 len += vsnprintf (buf + len, sizeof (buf) - len, format, ap); 189 buf.vprintf (format, ap);
48 va_end (ap); 190 va_end (ap);
49 191
50 len = min (sizeof (buf) - 1, len); 192 buf << '\n';
51 193
194 line.buf = buf.linearise ();
195 line.len = buf.size ();
196
52 if (buf [len - 1] != '\n') 197 if (line.buf [line.len - 2] == '\n')
53 buf [len++] = '\n'; // not 0-terminated 198 --line.len;
54 199
55 write (STDERR_FILENO, buf, len); 200 line.buf = salloc<char> (line.len, line.buf);
56 if (logfile != stderr) 201
57 fwrite (buf, 1, len, logfile); 202 buf.clear ();
203
204 if (logsync)
205 flags |= logSync;
58 206
59 if (flags & logBacktrace) 207 if (flags & logBacktrace)
208 {
209 line.buf [line.len - 1] = 0;
60 log_backtrace (buf); 210 log_backtrace (line.buf);
211 line.buf [line.len - 1] = '\n';
212 }
213
214 line.flags = flags;
215
216 if (line.flags & logSync)
217 log_sync (line);
218 else
219 {
220 SMUTEX_LOCK (mutex);
221 queue.push_back (line);
222 SMUTEX_UNLOCK (mutex);
223 SCOND_SIGNAL (cond);
224 }
61} 225}
226

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