aboutsummaryrefslogtreecommitdiffstats
path: root/src/Log.cpp
blob: 0792fcffee546c96c6a3d8a1d86461cdfb1138ae (plain)
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
/*
   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   Her Majesty the Queen in Right of Canada (Communications Research
   Center Canada)

   Copyright (C) 2016
   Matthias P. Braendli, matthias.braendli@mpb.li

    http://opendigitalradio.org
 */
/*
   This file is part of ODR-DabMod.

   ODR-DabMod is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as
   published by the Free Software Foundation, either version 3 of the
   License, or (at your option) any later version.

   ODR-DabMod is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with ODR-DabMod.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <list>
#include <stdarg.h>
#include <chrono>

#include "Log.h"
#include "Utils.h"

using namespace std;

Logger etiLog;


void Logger::register_backend(LogBackend* backend) {
    backends.push_back(backend);
    //log(info, "Registered new logger " + backend->get_name());
}


void Logger::log(log_level_t level, const char* fmt, ...)
{
    int size = 100;
    std::string str;
    va_list ap;
    while (1) {
        str.resize(size);
        va_start(ap, fmt);
        int n = vsnprintf((char *)str.c_str(), size, fmt, ap);
        va_end(ap);
        if (n > -1 && n < size) {
            str.resize(n);
            break;
        }
        if (n > -1)
            size = n + 1;
        else
            size *= 2;
    }

    logstr(level, str);
}

void Logger::logstr(log_level_t level, std::string message)
{
    log_message_t m(level, message);
    m_message_queue.push(std::move(m));
}

void Logger::io_process()
{
    set_thread_name("logger");
    while (1) {
        log_message_t m;
        m_message_queue.wait_and_pop(m);

        auto message = m.message;

        if (m.level == trace and m.message.empty()) {
            // Special message to stop thread
            break;
        }

        /* Remove a potential trailing newline.
         * It doesn't look good in syslog
         */
        if (message[message.length()-1] == '\n') {
            message.resize(message.length()-1);
        }

        for (auto &backend : backends) {
            backend->log(m.level, message);
        }

        if (m.level != log_level_t::trace) {
            std::lock_guard<std::mutex> guard(m_cerr_mutex);
            std::cerr << levels_as_str[m.level] << " " << message << std::endl;
        }
    }
}

LogLine Logger::level(log_level_t level)
{
    return LogLine(this, level);
}

void LogToFile::log(log_level_t level, const std::string& message)
{
    if (level != log_level_t::trace) {
        const char* log_level_text[] = {
            "DEBUG", "INFO", "WARN", "ERROR", "ALERT", "EMERG"};

        // fprintf is thread-safe
        fprintf(log_file, SYSLOG_IDENT ": %s: %s\n",
                log_level_text[(size_t)level], message.c_str());
        fflush(log_file);
    }
}

void LogToSyslog::log(log_level_t level, const std::string& message)
{
    if (level != log_level_t::trace) {
        int syslog_level = LOG_EMERG;
        switch (level) {
            case trace: break; // Do not handle TRACE in syslog
            case debug: syslog_level = LOG_DEBUG; break;
            case info:  syslog_level = LOG_INFO; break;
                        /* we don't have the notice level */
            case warn:  syslog_level = LOG_WARNING; break;
            case error: syslog_level = LOG_ERR; break;
            default:    syslog_level = LOG_CRIT; break;
            case alert: syslog_level = LOG_ALERT; break;
            case emerg: syslog_level = LOG_EMERG; break;
        }

        syslog(syslog_level, SYSLOG_IDENT " %s", message.c_str());
    }
}

LogTracer::LogTracer(const string& trace_filename)
{
    name = "TRACE";
    etiLog.level(info) << "Setting up TRACE to " << trace_filename;

    m_trace_file = fopen(trace_filename.c_str(), "a");
    if (m_trace_file == NULL) {
        fprintf(stderr, "Cannot open trace file !");
        throw std::runtime_error("Cannot open trace file !");
    }

    auto now = chrono::steady_clock::now().time_since_epoch();
    m_trace_micros_startup =
        chrono::duration_cast<chrono::microseconds>(now).count();

    fprintf(m_trace_file, "0,TRACER,startup at %ld\n", m_trace_micros_startup);
}

void LogTracer::log(log_level_t level, const std::string& message)
{
    if (level == log_level_t::trace) {
        const auto now = chrono::steady_clock::now().time_since_epoch();
        const auto micros = chrono::duration_cast<chrono::microseconds>(now).count();

        fprintf(m_trace_file, "%ld,%s\n",
                micros - m_trace_micros_startup,
                message.c_str());
    }
}