error.h 20.8 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
/* Spell-QTL  Software suite for the QTL analysis of modern datasets.
 * Copyright (C) 2016,2017  Damien Leroux <damien.leroux@inra.fr>, Sylvain Jasson <sylvain.jasson@inra.fr>
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

18
19
#ifndef _SPEL_ERROR_H_
#define _SPEL_ERROR_H_
20
21
22

#include <string>
#include <iostream>
23
#include <fstream>
24
#include <exception>
25
26
27
#include <set>
#include <utility>
#include <sstream>
28
#include <thread>
Damien Leroux's avatar
Damien Leroux committed
29
#include <mutex>
30
#include <functional>
31
#include <condition_variable>
32
#include <vector>
33
#include <deque>
34
35
#include "stl_output.h"

36
37
extern "C" {
#include <unistd.h>
Damien Leroux's avatar
WIP.    
Damien Leroux committed
38
#include <sys/ioctl.h>
39
#include <signal.h>
40
}
41
42
43

#define _WHITE "\x1b[37;1m"
#define _RED "\x1b[31;1m"
Damien Leroux's avatar
WIP.    
Damien Leroux committed
44
#define _GREEN "\x1b[32;1m"
45
46
47
48
#define _YELLOW "\x1b[33;1m"
#define _CYAN "\x1b[36;1m"
#define _NORMAL "\x1b[0;m"

49
50
51
52
53
54
55
#define _DBG_INDENT_MARK '\x11'
#define _DBG_DEDENT_MARK '\x12'
#define _DBG_INDENT_MARK_S "\x11"
#define _DBG_DEDENT_MARK_S "\x12"
#define _DBG_SYNC_MARK '\x13'
#define _DBG_SYNC_MARK_S "\x13"

56
57
#define MSG_HANDLER_IS_SYNCED

58

59
60
61
62
63

static inline std::string __fetch_string(const std::ostream& os)
{
    return dynamic_cast<const std::stringstream*>(&os)->str();
}
64
#define MESSAGE(_expr_) __fetch_string(std::stringstream() << _expr_)
65
66
67
68




69
70
template <typename X, typename W>
using if_integral = typename std::enable_if<std::is_integral<X>::value, W>::type;
71

72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
template <typename X, typename W>
using unless_integral = typename std::enable_if<!std::is_integral<X>::value, W>::type;



template <typename S>
struct builder {
    typedef std::basic_ostream<S> _Stream;
    std::stringstream _s;
    _Stream& out;

    static std::unique_lock<std::mutex> lock() { static std::mutex output_mutex; return std::unique_lock<std::mutex>(output_mutex); }

    builder(std::ostream& os) : _s(), out(os) {}
    builder(builder&& b) : _s(std::move(b._s)), out(b.out) {}
    ~builder() { auto synchronize_outputs = lock(); out << _s.str(); out.flush(); }

89
90
91
    builder<S>& operator << (const char* x);
    template <typename X> builder<S>& operator << (X&& x);
    builder<S>& operator << (_Stream&(*x)(_Stream&));
92
93
94
95
96
97
98
99
100
101
102
};



template <typename S>
struct endpoint {
    typedef std::basic_ostream<S> _Stream;
    _Stream& out;

    endpoint(_Stream& _) : out(_) {}

103
104
105
    builder<S> operator << (const char* x);
    template <typename X> builder<S> operator << (X&& x);
    builder<S> operator << (_Stream&(*x)(_Stream&));
106
};
Damien Leroux's avatar
Damien Leroux committed
107

108
109


110
111
struct DirectOutputIsForbidden : public std::runtime_error {
    DirectOutputIsForbidden()
112
            : std::runtime_error("Direct output to std::cerr, cout, or clog is forbidden. Use msg_handler_t::{cout|cerr|clog}() instead.")
113
114
115
    {}
};

116

117
118
119
120
121
122
123
124
125
126
/* inspired from http://stackoverflow.com/questions/22042414/c-stream-insert-string-after-newline */
class HeaderInserter : public std::streambuf {
    std::streambuf* dest;
    bool start_of_line;
    /*int indent;*/
    std::vector<std::string> prefix;
    bool prefix_insert_mode;
    std::stringstream prefix_ss;
protected:
    int overflow(int ch) override;
127

128
129
public:
    HeaderInserter(std::streambuf* dest)
130
131
            : dest(dest)
            , start_of_line(true)
132
133
134
135
            /*, indent(0)*/
            , prefix()
            , prefix_insert_mode(false)
            , prefix_ss()
136
    {}
137

138
139
    void rdbuf(std::streambuf* rb) { dest = rb; }
};
140

141
142
143
144
145
146
147
148
149
150
class ForbidOutput : public std::streambuf {
protected:
    int overflow(int) override
    {
        /* Direct output is forbidden */
        /*throw std::ios_base::failure("Direct output is forbidden");*/
        throw DirectOutputIsForbidden();
        abort();
    }
};
151

152
153
154
155
156
157
158
/* from http://wordaligned.org/articles/cpp-streambufs */
class teebuf: public std::streambuf
{
public:
    teebuf(std::streambuf * sb1, std::streambuf * sb2) : sb1(sb1), sb2(sb2) {}
private:
    virtual int overflow(int c)
159
    {
160
161
162
163
164
165
        if (c == EOF) {
            return !EOF;
        } else {
            int const r1 = sb1->sputc(c);
            int const r2 = sb2->sputc(c);
            return r1 == EOF || r2 == EOF ? EOF : c;
166
        }
167
    }
168

169
170
171
172
173
174
175
176
177
178
179
180
181
    virtual int sync() {
        int const r1 = sb1->pubsync();
        int const r2 = sb2->pubsync();
        return r1 == 0 && r2 == 0 ? 0 : -1;
    }
private:
    std::streambuf * sb1;
    std::streambuf * sb2;
};


struct ostream_manager {
    /* FIXME indent/dedent must be managed by this very class... Maybe use \x1 for indent and \x2 for dedent... */
182

183
184
185
186
187
    std::streambuf* old_cout_rdbuf;
    std::streambuf* old_clog_rdbuf;
    std::streambuf* old_cerr_rdbuf;
    HeaderInserter hi;
    ForbidOutput forbid;
188
189
    std::ostream _cerr, _cout, _clog;
    endpoint<char> cerr, cout, clog;
190

191
192
    std::vector<teebuf> tees;

193
    ostream_manager()
194
195
196
197
198
199
200
201
            : old_cout_rdbuf(std::cout.rdbuf())
            , old_clog_rdbuf(std::clog.rdbuf())
            , old_cerr_rdbuf(std::cerr.rdbuf())
            , hi(old_cout_rdbuf)
            , forbid()
            , _cerr(old_cerr_rdbuf), _cout(old_cout_rdbuf), _clog(&hi)
            , cerr(_cerr), cout(_cout), clog(_clog)
            , tees()
202
    {
203
        tees.reserve(3);
204
#ifndef SPELL_UNSAFE_OUTPUT
205
206
207
        std::clog.rdbuf(&forbid);
        std::cout.rdbuf(&forbid);
        std::cerr.rdbuf(&forbid);
208
209
#else
        std::clog.rdbuf(&hi);
210
#endif
211
212
213
214
    }

    ~ostream_manager()
    {
215
#ifndef SPELL_UNSAFE_OUTPUT
216
217
218
        std::clog.rdbuf(old_clog_rdbuf);
        std::cout.rdbuf(old_cout_rdbuf);
        std::cerr.rdbuf(old_cerr_rdbuf);
219
#endif
220
    }
221
222

    void
223
224
225
226
227
228
    redirect(std::ostream& os)
    {
        hi.rdbuf(os.rdbuf());
        _cerr.rdbuf(os.rdbuf());
        _cout.rdbuf(os.rdbuf());
    }
229
230

    void
231
232
233
234
235
236
    restore()
    {
        hi.rdbuf(old_clog_rdbuf);
        _cerr.rdbuf(old_cerr_rdbuf);
        _cout.rdbuf(old_cout_rdbuf);
    }
237
238
239
240
241
242
243

    void
    tee(std::ostream& os)
    {
        restore();
        tees.clear();
        tees.emplace_back(old_cout_rdbuf, os.rdbuf());
244
        _cout.rdbuf(&tees.back());
245
        tees.emplace_back(old_cerr_rdbuf, os.rdbuf());
246
        _cerr.rdbuf(&tees.back());
247
248
249
        tees.emplace_back(old_clog_rdbuf, os.rdbuf());
        hi.rdbuf(&tees.back());
    }
250
251
};

252
253


254
struct msg_handler_t {
255
#ifdef MSG_HANDLER_IS_SYNCED
256
257
    typedef std::recursive_mutex lock_type;
    typedef std::unique_lock<lock_type> scoped_lock_type;
258
259
260
261
262
263
264
265
266
#else
    typedef struct {
        void lock() {}
        void unlock() {}
    } lock_type;
    typedef struct _slt {
        _slt(lock_type&) {}
    } scoped_lock_type;
#endif
267

268
269
270
271
    struct state_t {
        bool color;
        std::set<std::string> workarounds;
        int count;
272
        int debug_indent;
273
        bool debug_enabled;
274
        bool quiet;
275
        std::vector<std::function<void()>> hooks;
276
        std::ostream raw_cout;
277
        ostream_manager manager;
278
        std::unique_ptr<std::ofstream> log_file;
279
280
281
282
283
284

        const char* error() { ++count; return color ? _RED : ""; }
        const char* warning() { return color ? _YELLOW : ""; }
        const char* info() { return color ? _CYAN : ""; }
        const char* normal() { return color ? _NORMAL : ""; }

285
        state_t()
286
287
                : color(!!isatty(fileno(stdout))), workarounds(), count(0), debug_indent(0), debug_enabled(true), quiet(false), hooks()
                , raw_cout(std::cout.rdbuf()), manager(), log_file(nullptr)
288
        {
289
            /*std::cout << "Message handler instance created." << std::endl;*/
290
        }
291
        ~state_t() { close_log_file(); }
292
293
        void check(bool fatal);
        void reset();
294
        void run_hooks() { for (auto& f: hooks) { f(); } }
295
296
297
        void close_log_file()
        {
            if (log_file) {
298
                manager.restore();
299
300
301
302
303
304
305
306
307
                log_file->close();
                log_file.reset(nullptr);
            }

        }
        void set_log_file(const std::string& path)
        {
            close_log_file();
            log_file.reset(new std::ofstream(path, std::ios_base::out|std::ios_base::app));
308
            manager.tee(*log_file);
309
        }
310
311
312
313
314
315
316
317
318
319
320
321
322
323
    };

    static state_t& instance() { static state_t _; return _; }

    static void set_color(bool _) { instance().color = _; }
    static bool color() { return instance().color; }

    static const char* e() { return instance().error(); }
    static const char* w() { return instance().warning(); }
    static const char* i() { return instance().info(); }
    static const char* n() { return instance().normal(); }

    static void check(bool fatal) { instance().check(fatal); }
    static void reset() { instance().reset(); }
324

325
326
327
    static void hook(std::function<void()>&& f) { instance().hooks.push_back(f); }
    static void run_hooks() { instance().run_hooks(); }

328
    static void indent() { instance().debug_indent += 3; }
329
330
331
332
333
334
335
336
337
338
339
340
341

    static endpoint<char>& cout() { return instance().manager.cout; }
    static endpoint<char>& cerr() { return instance().manager.cerr; }
    static endpoint<char>& clog() { return instance().manager.clog; }
//    static endpoint<std::ostream>& channel(msg_channel c)
//    {
//        switch (c) {
//            case msg_channel::Err: return cerr();
//            case msg_channel::Out: return cout();
//            case msg_channel::Log: return clog();
//        };
//    }

342
343
//    static void dedent() { instance().debug_indent -= 3; }
//    static int get_indent() { return instance().debug_indent; }
344

345
346
//    static void enqueue(const message_handle& mh) { instance().manager.enqueue(mh); }
//    static void wait_for_flush() { instance().manager.wait_for_flush(); }
347

Damien Leroux's avatar
WIP.    
Damien Leroux committed
348
349
350
351
352
353
354
    static int termcols()
    {
        struct winsize w;
        ioctl(0, TIOCGWINSZ, &w);
        return w.ws_col;
    }

355
    static bool& debug_enabled() { return instance().debug_enabled; }
356
    static bool& quiet() { return instance().quiet; }
357

358
    static lock_type mutex;
359

360
361
    static void redirect(std::ostream& os) { instance().manager.redirect(os); }
    static void restore() { instance().manager.restore(); }
362
    static void set_log_file(const std::string& path) { instance().set_log_file(path); }
363
364
};

365
366


367
inline
368
int HeaderInserter::overflow(int ch)
369
370
{
    int retval = 0;
371
    if (ch == _DBG_INDENT_MARK) {
372
373
374
375
376
377
378
379
        /*indent += 3;*/
        prefix_insert_mode = !prefix_insert_mode;
        if (prefix_insert_mode) {
            prefix_ss.clear();
            prefix_ss.str(std::string());
        } else {
            prefix.push_back(prefix_ss.str());
        }
380
    } else if (ch == _DBG_DEDENT_MARK) {
381
        if (prefix_insert_mode) {
382
            overflow(_DBG_INDENT_MARK);
383
384
385
386
387
388
389
        }
        if (prefix.size()) {
            prefix.pop_back();
        }
        /*indent -= 3 * (indent > 0);*/
    } else if (prefix_insert_mode) {
        prefix_ss << (char) ch;
390
    } else if (ch != traits_type::eof()) {
391
        if (start_of_line) {
392
393
            for (const std::string& s: prefix) {
                for (const char c: s) {
394
                    dest->sputc(c);
395
//                    dest->overflow(c);
396
                }
397
            }
398
            /*for (int i = 0; i < indent; ++i) {*/
399
            /*dest->sputc(' ');*/
400
            /*}*/
401
        }
402
        retval = dest->sputc(ch);
403
//        retval = dest->overflow(ch);
404
405
406
407
408
        start_of_line = ch == '\n';
    }
    return retval;
}

409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
















#if 0

enum msg_channel { Out, Err, Log };

struct message_struc {
    msg_channel channel;
    std::string message;
    message_struc(msg_channel c, std::string&& msg) : channel(c), message(std::move(msg)) {}
};

typedef std::shared_ptr<message_struc> message_handle;

/*#define MAKE_MESSAGE(_dest_, _expr_) do { std::stringstream __s; __s << _expr_; _dest_ = __s.str(); } while (0)*/




/*#define CREATE_MESSAGE(_var_, _channel_, _expr_) message_handle _var_(new message_struc {_channel_, MESSAGE(_expr_)});*/

#ifndef SPELL_UNSAFE_OUTPUT
//#define CREATE_MESSAGE(_channel_, _what_) if (!msg_handler_t::quiet()) msg_handler_t::enqueue(message_handle{new message_struc {_channel_, _what_}});
#define CREATE_MESSAGE(_channel_, _what_) do { msg_handler_t::channel(_channel) << _what_; } while (0)
#else
#define CREATE_MESSAGE(_channel_, _what_) if (!msg_handler_t::quiet()) switch(_channel_) { \
        case msg_channel::Out: \
            std::cout << _what_; \
            break; \
        case msg_channel::Err: \
            std::cerr << _what_; \
            break; \
        case msg_channel::Log: \
            std::clog << _what_; \
            break; \
    };
#endif




struct message_queue : public ostream_manager {
    typedef std::mutex mutex_type;
    typedef std::unique_lock<mutex_type> scoped_lock_type;

    std::deque<message_handle> m_queue;
    mutex_type m_mutex;
    mutex_type m_stream_mutex;
    std::condition_variable m_condition;
    std::condition_variable m_flush_condition;

    static void catch_SIGSEG(int signo);
    static sighandler_t& old_sighandler() { static sighandler_t _; return _; }

    bool m_stop;

    std::thread m_thread;

    message_queue()
        : ostream_manager()
        , m_queue()
        , m_mutex()
        , m_condition()
        , m_stop(false)
        , m_thread([this] () { run(); })
    {
        /*old_sighandler() = signal(SIGSEGV, catch_SIGSEG);*/
    }

    ~message_queue()
    {
        {
            scoped_lock_type lock(m_mutex);
            m_stop = true;
        }
        m_condition.notify_one();
        m_thread.join();
    }

    void enqueue(const message_handle& mh)
    {
        scoped_lock_type slt(m_mutex);
        m_queue.push_back(mh);
        m_condition.notify_one();
    }

    void lock_stream() { m_stream_mutex.lock(); }
    void unlock_stream() { m_stream_mutex.unlock(); }

    void run();

    void wait_for_flush()
    {
        scoped_lock_type lock(m_mutex);
        while (!m_queue.empty()) {
            m_flush_condition.wait(lock);
        }
    }
};





527
528
529
inline
void message_queue::run()
{
Damien Leroux's avatar
Damien Leroux committed
530
    message_handle  next;
531
532
    while (true)
    {
Damien Leroux's avatar
Damien Leroux committed
533
534
        {
            scoped_lock_type lock(m_mutex);
535

Damien Leroux's avatar
Damien Leroux committed
536
            m_condition.wait(lock, [this]() { return m_stop || !m_queue.empty(); });
537

Damien Leroux's avatar
Damien Leroux committed
538
539
540
            /*while (!m_stop && m_queue.empty()) {*/
                /*m_condition.wait(lock);*/
            /*}*/
541

Damien Leroux's avatar
Damien Leroux committed
542
543
544
            if (m_stop && m_queue.empty()) {
                return;
            }
545

Damien Leroux's avatar
Damien Leroux committed
546
547
            next = m_queue.front();
            m_queue.pop_front();
548

Damien Leroux's avatar
Damien Leroux committed
549
        }
550
        if (next->message == _DBG_SYNC_MARK_S) {
Damien Leroux's avatar
Damien Leroux committed
551
552
553
            m_flush_condition.notify_one();
            continue;
        } else if (next->message.size() == 0) {
554
555
            continue;
        }
Damien Leroux's avatar
Damien Leroux committed
556
557
558
        std::ostream& channel = next->channel == msg_channel::Out ? cout
                              : next->channel == msg_channel::Log ? clog
                              : cerr;
559
560
561
562
563
564
565
        lock_stream();
        channel << next->message << std::flush;
        unlock_stream();
        msg_handler_t::run_hooks();
    }
}

566
567
568
569
#endif



570
571
572
573
574
575
576
577
#ifdef SPELL_UNSAFE_OUTPUT

#define MSG_ERROR(_msg_expr_, _workaround_expr_) do { std::cerr << _msg_expr_ << std::endl; } while (0)
#define MSG_WARNING(_msg_expr_)  do { std::cout << _msg_expr_ << std::endl; } while (0)
#define MSG_INFO(_msg_expr_) do { std::cout << _msg_expr_ << std::endl; } while (0)
#define MSG_QUEUE_FLUSH()
#define MSG_DEBUG(_msg_expr_) do { std::clog << _msg_expr_ << std::endl; } while (0)

578
#elif 0
579

580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
#define MSG_ERROR(_msg_expr_, _workaround_expr_) \
    do {\
        CREATE_MESSAGE(msg_channel::Err, MESSAGE(msg_handler_t::e() << "[ERR] " << _msg_expr_ << msg_handler_t::n() << std::endl));\
        std::stringstream s; s << _workaround_expr_;\
        if (s.str().size()) { msg_handler_t::instance().workarounds.insert(s.str()); }\
} while (0)

#define MSG_WARNING(_msg_expr_) \
    do {\
        CREATE_MESSAGE(msg_channel::Out, MESSAGE(msg_handler_t::w() << "[WRN] " << _msg_expr_ << msg_handler_t::n() << std::endl));\
} while (0)

#define MSG_INFO(_msg_expr_) \
    do {\
        CREATE_MESSAGE(msg_channel::Out, MESSAGE(msg_handler_t::i() << "[MSG] " << _msg_expr_ << msg_handler_t::n() << std::endl));\
} while (0)

597
598
599
600
601
#define MSG_QUEUE_FLUSH() do { \
    CREATE_MESSAGE(msg_channel::Log, _DBG_SYNC_MARK_S); \
    msg_handler_t::wait_for_flush(); \
} while (0)

602
603
#define MSG_DEBUG(_msg_expr_) \
    do {\
604
605
606
607
        if (msg_handler_t::debug_enabled()) {\
            CREATE_MESSAGE(msg_channel::Log, MESSAGE(_msg_expr_ << std::endl));\
        }\
    } while (0);
608

609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
#define MSG_DEBUG_INDENT CREATE_MESSAGE(msg_channel::Log, _DBG_INDENT_MARK_S "   " _DBG_INDENT_MARK_S)
#define MSG_DEBUG_INDENT_EXPR(_str_) CREATE_MESSAGE(msg_channel::Log, _DBG_INDENT_MARK << _str_ << _DBG_INDENT_MARK)
#define MSG_DEBUG_DEDENT CREATE_MESSAGE(msg_channel::Log, _DBG_DEDENT_MARK_S)

#else

#define MSG_ERROR(_msg_expr_, _workaround_expr_) \
    do {\
        msg_handler_t::cerr() << msg_handler_t::e() << "[ERR] " << _msg_expr_ << msg_handler_t::n() << std::endl;\
        std::stringstream s; s << _workaround_expr_;\
        if (s.str().size()) { msg_handler_t::instance().workarounds.insert(s.str()); }\
} while (0)

#define MSG_WARNING(_msg_expr_) \
    do {\
        msg_handler_t::cout() << msg_handler_t::w() << "[WRN] " << _msg_expr_ << msg_handler_t::n() << std::endl;\
} while (0)

#define MSG_INFO(_msg_expr_) \
    do {\
        msg_handler_t::cout() << msg_handler_t::i() << "[MSG] " << _msg_expr_ << msg_handler_t::n() << std::endl;\
} while (0)

#define MSG_QUEUE_FLUSH()

#define MSG_DEBUG(_msg_expr_) \
    do {\
        if (msg_handler_t::debug_enabled()) {\
            msg_handler_t::clog() << _msg_expr_ << std::endl;\
        }\
    } while (0);

#define MSG_DEBUG_INDENT do { msg_handler_t::clog() << _DBG_INDENT_MARK_S "   " _DBG_INDENT_MARK_S; } while (0)
#define MSG_DEBUG_INDENT_EXPR(_str_) do { msg_handler_t::clog() << _DBG_INDENT_MARK << _str_ << _DBG_INDENT_MARK; } while (0)
#define MSG_DEBUG_DEDENT do { msg_handler_t::clog() << _DBG_DEDENT_MARK_S; } while (0)

645
#endif
Damien Leroux's avatar
Damien Leroux committed
646

647
#if 0
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
#define MSG_ERROR(_msg_expr_, _workaround_expr_) \
    do {\
        {msg_handler_t::scoped_lock_type _(msg_handler_t::mutex);\
        std::cerr << msg_handler_t::e() << "[ERR] " << _msg_expr_ << msg_handler_t::n() << std::endl;}\
        std::stringstream s; s << _workaround_expr_;\
        if (s.str().size()) { msg_handler_t::instance().workarounds.insert(s.str()); }\
        msg_handler_t::run_hooks();\
} while (0)

#define MSG_WARNING(_msg_expr_) \
    do {\
        msg_handler_t::scoped_lock_type _(msg_handler_t::mutex);\
        std::cerr << msg_handler_t::w() << "[WRN] " << _msg_expr_ << msg_handler_t::n() << std::endl;\
        msg_handler_t::run_hooks();\
    } while(0)

#define MSG_INFO(_msg_expr_) \
    do {\
        msg_handler_t::scoped_lock_type _(msg_handler_t::mutex);\
        std::cout << msg_handler_t::i() << "[MSG] " << _msg_expr_ << msg_handler_t::n() << std::endl;\
        msg_handler_t::run_hooks();\
    } while(0)

#define MSG_DEBUG(_msg_expr_) \
    do {\
        msg_handler_t::scoped_lock_type _(msg_handler_t::mutex);\
674
        std::clog << _msg_expr_ << std::endl;\
675
676
        msg_handler_t::run_hooks();\
    } while(0)
677
#endif
678

679

680
681
/*#ifndef _SPELL_ERROR_H_MSGQ_CATCH_SIGSEG_*/
/*#define _SPELL_ERROR_H_MSGQ_CATCH_SIGSEG_*/
682
683
684
685
686
687
688
689
//inline
//void message_queue::catch_SIGSEG(int)
//{
//    MSG_DEBUG("**SEGFAULT DETECTED**");
//    MSG_QUEUE_FLUSH();
//    signal(SIGSEGV, old_sighandler());
//    raise(SIGSEGV);
//}
690

691
/*#endif*/
692

693
694
695
696
697
698
struct scoped_indent {
    scoped_indent() { MSG_DEBUG_INDENT; }
    scoped_indent(const std::string& str) { MSG_DEBUG_INDENT_EXPR(str); }
    ~scoped_indent() { MSG_DEBUG_DEDENT; }
};

699

700
701
inline void msg_handler_t::state_t::check(bool fatal)
{
702
    msg_handler_t::scoped_lock_type _(msg_handler_t::mutex);
703
    if (count > 0) {
704
705
706
        cerr() << info() << "[MSG] " << count << " error"
               << (count > 1 ? "s were" : " was")
               << " reported. Suggestions to fix this:" << std::endl;
707
        for (auto& w: workarounds) {
708
            cerr() << info() << "      - " << w << normal() << std::endl;
709
710
        }
        if (fatal) {
711
            cout() << normal() <<"At least one fatal error encountered. Aborting process." << std::endl;
712
713
714
715
716
717
718
719
720
721
            exit(-count);
        } else {
            reset();
        }
    }
}

inline void msg_handler_t::state_t::reset()
{
    if (workarounds.size()) {
722
        MSG_WARNING(workarounds.size() << " workarounds silently discarded");
723
724
725
726
727
728
729
    }
    count = 0;
    workarounds.clear();
}

#define WHITE (msg_handler_t::instance().color ? _WHITE : "")
#define YELLOW (msg_handler_t::instance().color ? _YELLOW : "")
730
#define GREEN (msg_handler_t::instance().color ? _GREEN : "")
731
732
733
734
#define RED (msg_handler_t::instance().color ? _RED : "")
#define CYAN (msg_handler_t::instance().color ? _CYAN : "")
#define NORMAL (msg_handler_t::instance().color ? _NORMAL : "")

735
736
737
738
739
740
#ifdef NDEBUG
#define DUMP_FILE_LINE()
#else
#define DUMP_FILE_LINE() MSG_DEBUG(__FILE__ << ':' << __LINE__)
#endif

741
742
#endif