src/common/compat/uuid.h

   1 /*
   2  * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to
   6  * deal in the Software without restriction, including without limitation the
   7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8  * sell copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  */
  22
  23 #ifndef LTTNG_UUID_H
  24 #define LTTNG_UUID_H
  25
  26 /*
  27  * Includes final \0.
  28  */
  29 #define UUID_STR_LEN            37
  30 #define UUID_LEN                16
  31
  32 #ifdef LTTNG_HAVE_LIBUUID
  33 #include <uuid/uuid.h>
  34
  35 /*
  36  * uuid_out is of len UUID_LEN.
  37  */
  38 static inline
  39 int lttng_uuid_generate(unsigned char *uuid_out)
  40 {
  41         uuid_generate(uuid_out);
  42         return 0;
  43 }
  44
  45 #elif defined(LTTNG_HAVE_LIBC_UUID)
  46 #include <uuid.h>
  47 #include <stdint.h>
  48
  49 /*
  50  * uuid_out is of len UUID_LEN.
  51  */
  52 static inline
  53 int lttng_uuid_generate(unsigned char *uuid_out)
  54 {
  55         uint32_t status;
  56
  57         uuid_create((uuid_t *) uuid_out, &status);
  58         if (status == uuid_s_ok)
  59                 return 0;
  60         else
  61                 return -1;
  62 }
  63
  64 #else
  65 #error "LTTng-Tools needs to have a UUID generator configured."
  66 #endif
  67
  68 #endif /* LTTNG_UUID_H */