include/usterr.h

   1 /* Copyright (C) 2009  Pierre-Marc Fournier
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  16  */
  17
  18 #ifndef _USTERR_H
  19 #define _USTERR_H
  20
  21 #include <string.h>
  22 #include <sys/types.h>
  23 #include <sys/syscall.h>
  24 #include <errno.h>
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27
  28 #include <ust/core.h>
  29
  30 #include "share.h"
  31
  32 #ifndef UST_COMPONENT
  33 #define UST_COMPONENT libust
  34 #endif
  35
  36 /* To stringify the expansion of a define */
  37 #define XSTR(d) STR(d)
  38 #define STR(s) #s
  39
  40 /* A dummy function to force format checking */
  41 static inline void __attribute__ ((format (printf, 1, 2)))
  42         __check_ust_safe_fmt(const char *fmt, ...)
  43 {
  44 }
  45
  46 #define UST_STR_COMPONENT XSTR(UST_COMPONENT)
  47
  48 #define ERRMSG(fmt, args...) do { fprintf(stderr, UST_STR_COMPONENT "[%ld/%ld]: " fmt " (in %s() at " __FILE__ ":" XSTR(__LINE__) ")\n", (long) getpid(), (long) syscall(SYS_gettid), ## args, __func__); } while(0)
  49
  50 #ifdef UST_DEBUG
  51 # define DBG(fmt, args...) ERRMSG(fmt, ## args)
  52 # define DBG_raw(fmt, args...) do { fprintf(stderr, fmt, ## args); } while(0)
  53 #else
  54 # define DBG(fmt, args...) __check_ust_safe_fmt(fmt, ## args)
  55 # define DBG_raw(fmt, args...) __check_ust_safe_fmt(fmt, ## args)
  56 #endif
  57 #define WARN(fmt, args...) ERRMSG("Warning: " fmt, ## args)
  58 #define ERR(fmt, args...) ERRMSG("Error: " fmt, ## args)
  59 #define BUG(fmt, args...) ERRMSG("BUG: " fmt, ## args)
  60
  61 #if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE)
  62 #define PERROR(call, args...)\
  63         do { \
  64                 char buf[200] = "Error in strerror_r()"; \
  65                 strerror_r(errno, buf, sizeof(buf)); \
  66                 ERRMSG("Error: " call ": %s", ## args, buf); \
  67         } while(0);
  68 #else
  69 #define PERROR(call, args...)\
  70         do { \
  71                 char *buf; \
  72                 char tmp[200]; \
  73                 buf = strerror_r(errno, tmp, sizeof(tmp)); \
  74                 ERRMSG("Error: " call ": %s", ## args, buf); \
  75         } while(0);
  76 #endif
  77
  78 #define BUG_ON(condition) do { if (unlikely(condition)) ERR("condition not respected (BUG)"); } while(0)
  79 #define WARN_ON(condition) do { if (unlikely(condition)) WARN("condition not respected on line %s:%d", __FILE__, __LINE__); } while(0)
  80 #define WARN_ON_ONCE(condition) WARN_ON(condition)
  81
  82 #endif /* _USTERR_H */