src/common/error.h

   1 /*
   2  * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the Free
   6  * Software Foundation; only version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  15  * Place - Suite 330, Boston, MA  02111-1307, USA.
  16  */
  17
  18 #ifndef _ERROR_H
  19 #define _ERROR_H
  20
  21 #include <errno.h>
  22 #include <stdio.h>
  23
  24 /* Stringify the expansion of a define */
  25 #define XSTR(d) STR(d)
  26 #define STR(s) #s
  27
  28 extern int opt_quiet;
  29 extern int opt_verbose;
  30
  31 #define PRINT_ERR   0x1
  32 #define PRINT_WARN  0x2
  33 #define PRINT_BUG   0x3
  34 #define PRINT_MSG   0x4
  35 #define PRINT_DBG   0x10
  36 #define PRINT_DBG2  0x20
  37 #define PRINT_DBG3  0x30
  38
  39 /*
  40  * Macro for printing message depending on command line option and verbosity.
  41  */
  42 #define __lttng_print(type, fmt, args...)                                 \
  43         do {                                                                  \
  44                 if (opt_quiet == 0) {                                             \
  45                         if (type == PRINT_MSG) {                                      \
  46                                 fprintf(stdout, fmt, ## args);                            \
  47                         } else if (((type & PRINT_DBG) && opt_verbose == 1) ||        \
  48                                         ((type & (PRINT_DBG | PRINT_DBG2)) &&                 \
  49                                                 opt_verbose == 2) ||                              \
  50                                         ((type & (PRINT_DBG | PRINT_DBG2 | PRINT_DBG3)) &&    \
  51                                                 opt_verbose == 3)) {                              \
  52                                 fprintf(stderr, fmt, ## args);                            \
  53                         } else if (type & (PRINT_ERR | PRINT_WARN | PRINT_BUG)) {     \
  54                                 fprintf(stderr, fmt, ## args);                            \
  55                         }                                                             \
  56                 }                                                                 \
  57         } while (0);
  58
  59 #define MSG(fmt, args...) \
  60         __lttng_print(PRINT_MSG, fmt "\n", ## args)
  61 #define ERR(fmt, args...) \
  62         __lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
  63 #define WARN(fmt, args...) \
  64         __lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
  65 #define BUG(fmt, args...) \
  66         __lttng_print(PRINT_BUG, "BUG: " fmt "\n", ## args)
  67
  68 /* Three level of debug. Use -v, -vv or -vvv for the levels */
  69 #define DBG(fmt, args...) __lttng_print(PRINT_DBG, "DEBUG1: " fmt \
  70                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  71 #define DBG2(fmt, args...) __lttng_print(PRINT_DBG2, "DEBUG2: " fmt \
  72                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  73 #define DBG3(fmt, args...) __lttng_print(PRINT_DBG3, "DEBUG3: " fmt \
  74                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  75
  76 #define _PERROR(fmt, args...) \
  77         __lttng_print(PRINT_ERR, "perror " fmt "\n", ## args)
  78
  79 #define PERROR(call, args...) \
  80     do { \
  81                 char *buf; \
  82                 char tmp[200]; \
  83                 buf = strerror_r(errno, tmp, sizeof(tmp)); \
  84                 _PERROR(call ": %s", ## args, buf); \
  85         } while(0);
  86
  87 #endif /* _ERROR_H */