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 #include <string.h>
  24
  25 /* Stringify the expansion of a define */
  26 #define XSTR(d) STR(d)
  27 #define STR(s) #s
  28
  29 extern int opt_quiet;
  30 extern int opt_verbose;
  31
  32 #define PRINT_ERR   0x1
  33 #define PRINT_WARN  0x2
  34 #define PRINT_BUG   0x3
  35 #define PRINT_MSG   0x4
  36 #define PRINT_DBG   0x10
  37 #define PRINT_DBG2  0x20
  38 #define PRINT_DBG3  0x30
  39
  40 /*
  41  * Macro for printing message depending on command line option and verbosity.
  42  */
  43 #define __lttng_print(type, fmt, args...)                                 \
  44         do {                                                                  \
  45                 if (opt_quiet == 0) {                                             \
  46                         if (type == PRINT_MSG) {                                      \
  47                                 fprintf(stdout, fmt, ## args);                            \
  48                         } else if (((type & PRINT_DBG) && opt_verbose == 1) ||        \
  49                                         ((type & (PRINT_DBG | PRINT_DBG2)) &&                 \
  50                                                 opt_verbose == 2) ||                              \
  51                                         ((type & (PRINT_DBG | PRINT_DBG2 | PRINT_DBG3)) &&    \
  52                                                 opt_verbose == 3)) {                              \
  53                                 fprintf(stderr, fmt, ## args);                            \
  54                         } else if (type & (PRINT_ERR | PRINT_WARN | PRINT_BUG)) {     \
  55                                 fprintf(stderr, fmt, ## args);                            \
  56                         }                                                             \
  57                 }                                                                 \
  58         } while (0);
  59
  60 #define MSG(fmt, args...) \
  61         __lttng_print(PRINT_MSG, fmt "\n", ## args)
  62 #define ERR(fmt, args...) \
  63         __lttng_print(PRINT_ERR, "Error: " fmt "\n", ## args)
  64 #define WARN(fmt, args...) \
  65         __lttng_print(PRINT_WARN, "Warning: " fmt "\n", ## args)
  66 #define BUG(fmt, args...) \
  67         __lttng_print(PRINT_BUG, "BUG: " fmt "\n", ## args)
  68
  69 /* Three level of debug. Use -v, -vv or -vvv for the levels */
  70 #define DBG(fmt, args...) __lttng_print(PRINT_DBG, "DEBUG1: " fmt \
  71                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  72 #define DBG2(fmt, args...) __lttng_print(PRINT_DBG2, "DEBUG2: " fmt \
  73                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  74 #define DBG3(fmt, args...) __lttng_print(PRINT_DBG3, "DEBUG3: " fmt \
  75                 " [in %s() at " __FILE__ ":" XSTR(__LINE__) "]\n", ## args, __func__)
  76
  77 #define _PERROR(fmt, args...) \
  78         __lttng_print(PRINT_ERR, "perror " fmt "\n", ## args)
  79
  80 #if !defined(__linux__) || ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE))
  81 /*
  82  * Version using XSI strerror_r.
  83  */
  84 #define PERROR(call, args...) \
  85         do { \
  86                 char buf[200]; \
  87                 strerror_r(errno, buf, sizeof(buf)); \
  88                 _PERROR(call ": %s", ## args, buf); \
  89         } while(0);
  90 #else
  91 /*
  92  * Version using GNU strerror_r, for linux with appropriate defines.
  93  */
  94 #define PERROR(call, args...) \
  95         do { \
  96                 char *buf; \
  97                 char tmp[200]; \
  98                 buf = strerror_r(errno, tmp, sizeof(tmp)); \
  99                 _PERROR(call ": %s", ## args, buf); \
 100         } while(0);
 101 #endif
 102
 103 #endif /* _ERROR_H */