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Comparing deliantra/server/common/logger.C (file contents):
Revision 1.2 by root, Sun Aug 27 16:15:11 2006 UTC vs.
Revision 1.28 by root, Tue Jan 3 11:25:31 2012 UTC

1/* 1/*
2 * static char *rcsid_loger_c = 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * "$Id: logger.C,v 1.2 2006/08/27 16:15:11 root Exp $ "; 3 *
4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 *
6 * Deliantra is free software: you can redistribute it and/or modify it under
7 * the terms of the Affero GNU General Public License as published by the
8 * Free Software Foundation, either version 3 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the Affero GNU General Public License
17 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>.
19 *
20 * The authors can be reached via e-mail to <support@deliantra.net>
4 */ 21 */
5 22
6/*
7 CrossFire, A Multiplayer game for X-windows
8
9 Copyright (C) 2002 Mark Wedel & Crossfire Development Team
10 Copyright (C) 1992 Frank Tore Johansen
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26 The authors can be reached via e-mail at crossfire-devel@real-time.com
27*/
28
29
30#include <stdarg.h> 23#include <cstdarg>
24#include <cstring>
25
26#include <vector>
27
28#include <sys/uio.h>
29#include <pthread.h>
30
31#include <global.h> 31#include "global.h"
32#include <funcpoint.h> 32#include "dynbuf.h"
33#include "util.h"
33 34
34/* 35struct logline
35 * Logs a message to stderr, or to file, and/or even to socket.
36 * Or discards the message if it is of no importanse, and none have
37 * asked to hear messages of that logLevel.
38 *
39 * See include/logger.h for possible logLevels. Messages with llevInfo
40 * and llevError are always printed, regardless of debug mode.
41 */
42
43void LOG (LogLevel logLevel, const char *format, ...)
44{ 36{
45 char buf[20480]; /* This needs to be really really big - larger 37 struct timeval tv;
46 * than any other buffer, since that buffer may 38 char *buf; // includes PREFIX_LEN garbage bytes
47 * need to be put in this one. 39 int len;
48 */ 40 int flags;
49 char tbuf[20480]; 41};
50 42
51 time_t curtime = time (NULL); 43typedef std::vector<logline, slice_allocator<logline> > logvector;
52 struct tm *ptime = localtime (&curtime);
53 44
54 strftime (tbuf, 256, "%Y-%m-%d %H:%M:%S ", ptime); 45static SMUTEX(mutex);
46static SMUTEX(fdlock);
47static SCOND(cond);
48static int logfd = STDERR_FILENO;
49static int logsync = 1;
50static logvector queue;
51
52int log_setfd (int fd)
53{
54 SMUTEX_LOCK (fdlock);
55 int old = logfd;
56 logfd = fd < 0 ? STDERR_FILENO : fd;
57 SMUTEX_UNLOCK (fdlock);
58
59 return old;
60}
61
62#define PREFIX_LEN sizeof ("0000-00-00 00:00:00.0000 L+") - 1
63
64static void
65log_sync (logline &line)
66{
67 static const char levelchar [16+1] = "EWIDt???????????";
68 struct tm lt;
69 char pfx [PREFIX_LEN];
70
71 localtime_r (&line.tv.tv_sec, &lt);
72
73 sprintf (pfx, "%04d-%02d-%02d %02d:%02d:%02d.%04d %c",
74 lt.tm_year + 1900,
75 lt.tm_mon + 1,
76 lt.tm_mday,
77 lt.tm_hour,
78 lt.tm_min,
79 lt.tm_sec,
80 (int)(line.tv.tv_usec / 100),
81 levelchar [line.flags & 15]
82 );
83
84 pfx [PREFIX_LEN - 1] = line.flags & logSync ? '=' : ' ';
85
86 struct iovec iov [2];
87
88 iov [0].iov_base = pfx;
89 iov [0].iov_len = PREFIX_LEN;
90
91 char *buf = line.buf;
92
93 if (logsync != 2)
94 SMUTEX_LOCK (fdlock);
95
96 while (char *end = strchr (buf, '\n'))
97 {
98 iov [1].iov_base = buf;
99 iov [1].iov_len = end - buf + 1;
100
101 writev (STDERR_FILENO, iov, 2);
102 if (logfd != STDERR_FILENO)
103 writev (logfd, iov, 2);
104
105 buf = end + 1;
106
107 if (buf == line.buf + line.len)
108 break;
109
110 pfx [PREFIX_LEN - 1] = '+';
111 }
112
113 if (logsync != 2)
114 SMUTEX_UNLOCK (fdlock);
115
116 sfree (line.buf, line.len);
117}
118
119static void *
120logthread_proc (void *arg)
121{
122 int idx = 0;
123
124 for (;;)
125 {
126 logline line;
127
128 SMUTEX_LOCK (mutex);
129
130 while (queue.empty ())
131 SCOND_WAIT (cond, mutex);
132
133 line = queue [idx++];
134
135 // this algorithm could result in an ever-increasing vector
136 // size if we log faster than we can write, but if that happens
137 // we have bigger problems.
138 if (idx == queue.size ())
139 {
140 if (idx < 32)
141 queue.clear ();
142 else
143 logvector ().swap (queue); // free memory, hopefully
144
145 idx = 0;
146 }
147
148 SMUTEX_UNLOCK (mutex);
149
150 log_sync (line);
151 }
152}
153
154void
155log_cleanup ()
156{
157 logsync = 1;
158 SMUTEX_UNLOCK (fdlock);
159
160 for (;;)
161 {
162 int done;
163
164 SMUTEX_LOCK (mutex);
165 done = queue.empty ();
166 SMUTEX_UNLOCK (mutex);
167
168 if (done)
169 break;
170
171 usleep (10000);
172 SMUTEX_LOCK (fdlock);
173 SMUTEX_UNLOCK (fdlock);
174 }
175}
176
177static void
178af_child ()
179{
180 logsync = 2;
181}
182
183static struct logthread : thread
184{
185 logthread ()
186 {
187 pthread_atfork (0, 0, af_child);
188 start (logthread_proc);
189 logsync = 0;
190 }
191} logthread;
192
193void
194LOG (int flags, const_utf8_string format, ...)
195{
196 int level = flags & 15;
197
198 if (level > settings.debug)
199 return;
200
201 logline line;
202 gettimeofday (&line.tv, 0);
203
204 static dynbuf_text buf;
55 205
56 va_list ap; 206 va_list ap;
57 va_start(ap, format); 207 va_start (ap, format);
58 208 buf.vprintf (format, ap);
59 buf[0] = '\0';
60 if (logLevel <= settings.debug)
61 {
62 vsnprintf(buf, sizeof (buf), format, ap);
63 strncat(tbuf, buf, 20460);
64#ifdef WIN32 /* ---win32 change log handling for win32 */
65 fputs(tbuf, logfile); /* wrote to file or stdout */
66#ifdef DEBUG /* if we have a debug version, we want see ALL output */
67 fflush(logfile); /* so flush this! */
68#endif
69 if(logfile != stderr) /* if was it a logfile wrote it to screen too */
70 fputs(tbuf, stderr);
71#else
72 fputs(tbuf, logfile);
73#endif
74 }
75 if (!exiting && !trying_emergency_save &&
76 logLevel == llevError && ++nroferrors > MAX_ERRORS) {
77 exiting = 1;
78 if (!trying_emergency_save)
79 emergency_save(0);
80 }
81 va_end(ap); 209 va_end (ap);
210
211 buf << '\n';
212
213 line.buf = buf.linearise ();
214 line.len = buf.size ();
215
216 if (line.buf [line.len - 2] == '\n')
217 --line.len;
218
219 line.buf = salloc<char> (line.len, line.buf);
220
221 buf.clear ();
222
223 if (logsync)
224 flags |= logSync;
225
226 if (flags & logBacktrace)
227 {
228 line.buf [line.len - 1] = 0;
229 log_backtrace (line.buf);
230 line.buf [line.len - 1] = '\n';
231 }
232
233 line.flags = flags;
234
235 if (line.flags & logSync)
236 log_sync (line);
237 else
238 {
239 SMUTEX_LOCK (mutex);
240 queue.push_back (line);
241 SMUTEX_UNLOCK (mutex);
242 SCOND_SIGNAL (cond);
243 }
82} 244}
245
246static int suspended;
247
248void
249log_suspend ()
250{
251 if (!suspended++)
252 {
253 LOG (llevDebug, "logging suspended.");
254 SMUTEX_LOCK (fdlock);
255 }
256}
257
258void
259log_resume ()
260{
261 if (!--suspended)
262 {
263 SMUTEX_UNLOCK (fdlock);
264 LOG (llevDebug, "logging resumed.");
265 }
266}
267

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