common/JackError.cpp

   1 /*
   2     Copyright (C) 2001 Paul Davis
   3         Copyright (C) 2004-2008 Grame
   4     Copyright (C) 2008 Nedko Arnaudov
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your 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 GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include "JackError.h"
  25 #include "JackGlobals.h"
  26 #include "JackMessageBuffer.h"
  27
  28 int jack_verbose = 0;
  29
  30 void change_thread_log_function(jack_log_function_t log_function)
  31 {
  32     if (!jack_tls_set(g_key_log_function, (void*)log_function))
  33     {
  34         jack_error("failed to set thread log function");
  35     }
  36 }
  37
  38 SERVER_EXPORT void set_threaded_log_function()
  39 {
  40     change_thread_log_function(Jack::JackMessageBufferAdd);
  41 }
  42
  43 void jack_log_function(int level, const char *message)
  44 {
  45     void (* log_callback)(const char *);
  46
  47     switch (level)
  48     {
  49     case LOG_LEVEL_INFO:
  50         log_callback = jack_info_callback;
  51         break;
  52     case LOG_LEVEL_ERROR:
  53         log_callback = jack_error_callback;
  54         break;
  55     default:
  56         return;
  57     }
  58
  59     log_callback(message);
  60 }
  61
  62 static void jack_format_and_log(int level, const char *prefix, const char *fmt, va_list ap)
  63 {
  64     char buffer[300];
  65     size_t len;
  66     jack_log_function_t log_function;
  67
  68     if (prefix != NULL) {
  69         len = strlen(prefix);
  70         memcpy(buffer, prefix, len);
  71     } else {
  72         len = 0;
  73     }
  74
  75     vsnprintf(buffer + len, sizeof(buffer) - len, fmt, ap);
  76
  77     log_function = (jack_log_function_t)jack_tls_get(g_key_log_function);
  78
  79     /* if log function is not overriden for thread, use default one */
  80     if (log_function == NULL)
  81     {
  82         log_function = jack_log_function;
  83         //log_function(LOG_LEVEL_INFO, "------ Using default log function");
  84     }
  85     else
  86     {
  87         //log_function(LOG_LEVEL_INFO, "++++++ Using thread-specific log function");
  88     }
  89
  90     log_function(level, buffer);
  91 }
  92
  93 SERVER_EXPORT void jack_error(const char *fmt, ...)
  94 {
  95         va_list ap;
  96         va_start(ap, fmt);
  97         jack_format_and_log(LOG_LEVEL_ERROR, NULL, fmt, ap);
  98         va_end(ap);
  99 }
 100
 101 SERVER_EXPORT void jack_info(const char *fmt, ...)
 102 {
 103         va_list ap;
 104         va_start(ap, fmt);
 105         jack_format_and_log(LOG_LEVEL_INFO, NULL, fmt, ap);
 106         va_end(ap);
 107 }
 108
 109 SERVER_EXPORT void jack_log(const char *fmt,...)
 110 {
 111         if (jack_verbose) {
 112                 va_list ap;
 113                 va_start(ap, fmt);
 114         jack_format_and_log(LOG_LEVEL_INFO, "Jack: ", fmt, ap);
 115                 va_end(ap);
 116         }
 117 }
 118
 119 static void default_jack_error_callback(const char *desc)
 120 {
 121     fprintf(stderr, "%s\n", desc);
 122     fflush(stderr);
 123 }
 124
 125 static void default_jack_info_callback (const char *desc)
 126 {
 127     fprintf(stdout, "%s\n", desc);
 128     fflush(stdout);
 129 }
 130
 131 SERVER_EXPORT void (*jack_error_callback)(const char *desc) = &default_jack_error_callback;
 132 SERVER_EXPORT void (*jack_info_callback)(const char *desc) = &default_jack_info_callback;