1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/**
* Logging facility for debug/info messages.
* _EGL_FATAL messages are printed to stderr
* The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs.
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "egllog.h"
#include "eglstring.h"
#include "eglmutex.h"
#define MAXSTRING 1000
#define FALLBACK_LOG_LEVEL _EGL_WARNING
static struct {
_EGLMutex mutex;
EGLBoolean initialized;
EGLint level;
_EGLLogProc logger;
EGLint num_messages;
} logging = {
_EGL_MUTEX_INITIALIZER,
EGL_FALSE,
FALLBACK_LOG_LEVEL,
NULL,
0
};
static const char *level_strings[] = {
/* the order is important */
"fatal",
"warning",
"info",
"debug",
NULL
};
/**
* Set the function to be called when there is a message to log.
* Note that the function will be called with an internal lock held.
* Recursive logging is not allowed.
*/
void
_eglSetLogProc(_EGLLogProc logger)
{
EGLint num_messages = 0;
_eglLockMutex(&logging.mutex);
if (logging.logger != logger) {
logging.logger = logger;
num_messages = logging.num_messages;
logging.num_messages = 0;
}
_eglUnlockMutex(&logging.mutex);
if (num_messages)
_eglLog(_EGL_DEBUG,
"New logger installed. "
"Messages before the new logger might not be available.");
}
/**
* Set the log reporting level.
*/
void
_eglSetLogLevel(EGLint level)
{
switch (level) {
case _EGL_FATAL:
case _EGL_WARNING:
case _EGL_INFO:
case _EGL_DEBUG:
_eglLockMutex(&logging.mutex);
logging.level = level;
_eglUnlockMutex(&logging.mutex);
break;
default:
break;
}
}
/**
* The default logger. It prints the message to stderr.
*/
static void
_eglDefaultLogger(EGLint level, const char *msg)
{
fprintf(stderr, "libEGL %s: %s\n", level_strings[level], msg);
}
/**
* Initialize the logging facility.
*/
static void
_eglInitLogger(void)
{
const char *log_env;
EGLint i, level = -1;
if (logging.initialized)
return;
log_env = getenv("EGL_LOG_LEVEL");
if (log_env) {
for (i = 0; level_strings[i]; i++) {
if (_eglstrcasecmp(log_env, level_strings[i]) == 0) {
level = i;
break;
}
}
}
else {
level = FALLBACK_LOG_LEVEL;
}
logging.logger = _eglDefaultLogger;
logging.level = (level >= 0) ? level : FALLBACK_LOG_LEVEL;
logging.initialized = EGL_TRUE;
/* it is fine to call _eglLog now */
if (log_env && level < 0) {
_eglLog(_EGL_WARNING,
"Unrecognized EGL_LOG_LEVEL environment variable value. "
"Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
"Got \"%s\". Falling back to \"%s\".",
log_env, level_strings[FALLBACK_LOG_LEVEL]);
}
}
/**
* Log a message with message logger.
* \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
*/
void
_eglLog(EGLint level, const char *fmtStr, ...)
{
va_list args;
char msg[MAXSTRING];
int ret;
/* one-time initialization; a little race here is fine */
if (!logging.initialized)
_eglInitLogger();
if (level > logging.level || level < 0)
return;
_eglLockMutex(&logging.mutex);
if (logging.logger) {
va_start(args, fmtStr);
ret = vsnprintf(msg, MAXSTRING, fmtStr, args);
if (ret < 0 || ret >= MAXSTRING)
strcpy(msg, "<message truncated>");
va_end(args);
logging.logger(level, msg);
logging.num_messages++;
}
_eglUnlockMutex(&logging.mutex);
if (level == _EGL_FATAL)
exit(1); /* or abort()? */
}
|
