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
|
/*
* logger.cc
* Copyright 2014 John Lindgren and William Pitcock
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include "audstrings.h"
#include "index.h"
#include "runtime.h"
#include "tinylock.h"
#include <stdio.h>
namespace audlog {
struct HandlerData {
Handler handler;
Level level;
};
static TinyRWLock lock;
static Index<HandlerData> handlers;
static Level stderr_level = Warning;
static Level min_level = Warning;
EXPORT void set_stderr_level (Level level)
{
tiny_lock_write (& lock);
min_level = stderr_level = level;
for (const HandlerData & h : handlers)
{
if (h.level < min_level)
min_level = h.level;
}
tiny_unlock_write (& lock);
}
EXPORT void subscribe (Handler handler, Level level)
{
tiny_lock_write (& lock);
handlers.append (handler, level);
if (level < min_level)
min_level = level;
tiny_unlock_write (& lock);
}
EXPORT void unsubscribe (Handler handler)
{
tiny_lock_write (& lock);
auto is_match = [=] (const HandlerData & data)
{ return data.handler == handler; };
handlers.remove_if (is_match, true);
min_level = stderr_level;
for (const HandlerData & h : handlers)
{
if (h.level < min_level)
min_level = h.level;
}
tiny_unlock_write (& lock);
}
EXPORT const char * get_level_name (Level level)
{
switch (level)
{
case Debug: return "DEBUG";
case Info: return "INFO";
case Warning: return "WARNING";
case Error: return "ERROR";
};
return nullptr;
}
EXPORT void log (Level level, const char * file, int line, const char * func,
const char * format, ...)
{
tiny_lock_read (& lock);
if (level >= min_level)
{
va_list args;
va_start (args, format);
StringBuf message = str_vprintf (format, args);
va_end (args);
if (level >= stderr_level)
fprintf (stderr, "%s %s:%d [%s]: %s", get_level_name (level), file,
line, func, (const char *) message);
for (const HandlerData & h : handlers)
{
if (level >= h.level)
h.handler (level, file, line, func, message);
}
}
tiny_unlock_read (& lock);
}
} // namespace audlog
|
