liblttng-ust/uuid.h

   1 #ifndef _LTTNG_UST_UUID_H
   2 #define _LTTNG_UST_UUID_H
   3
   4 /*
   5  * Copyright (C) 2011   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
   8  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
   9  *
  10  * Permission is hereby granted to use or copy this program
  11  * for any purpose,  provided the above notices are retained on all copies.
  12  * Permission to modify the code and to distribute modified code is granted,
  13  * provided the above notices are retained, and a notice that the code was
  14  * modified is included with the above copyright notice.
  15  */
  16
  17 #include <config.h>
  18 #include <lttng/ust-events.h> /* For LTTNG_UST_UUID_LEN */
  19 /*
  20  * Includes final \0.
  21  */
  22 #define LTTNG_UST_UUID_STR_LEN          37
  23
  24 #include <uuid/uuid.h>
  25
  26 #ifdef LTTNG_UST_HAVE_LIBUUID
  27 static inline
  28 int lttng_ust_uuid_generate(unsigned char *uuid_out)
  29 {
  30         uuid_generate(uuid_out);
  31         return 0;
  32 }
  33
  34 #elif defined(LTTNG_UST_HAVE_LIBC_UUID)
  35 #include <uuid.h>
  36 #include <stdint.h>
  37
  38 static inline
  39 int lttng_ust_uuid_generate(unsigned char *uuid_out)
  40 {
  41         uint32_t status;
  42
  43         uuid_create(uuid_out, &status);
  44         if (status == uuid_s_ok)
  45                 return 0;
  46         else
  47                 return -1;
  48 }
  49
  50 #else
  51 #error "LTTng-UST needs to have a UUID generator configured."
  52 #endif
  53
  54 #endif /* _LTTNG_UST_UUID_H */