mdw@git.distorted.org.uk Git - catacomb/blob - rand/randgen.c

   1 /* -*-c-*-
   2  *
   3  * Pool-generation boundary machinery (Unix-specific)
   4  *
   5  * (c) 2016 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  12  * Catacomb is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * Catacomb is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with Catacomb; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <unistd.h>
  31
  32 #include "rand.h"
  33
  34 /*----- Main code ---------------------------------------------------------*/
  35
  36 /* --- @rand_generation@ --- *
  37  *
  38  * Arguments:   ---
  39  *
  40  * Returns:     A nonzero generation number.
  41  *
  42  * Use:         Returns a generation number for the current process.  Each
  43  *              pool has its own number.  If this matches the process number
  44  *              then all is well.  If it doesn't match, then the pool needs
  45  *              to be cleaned before its next use.
  46  */
  47
  48 unsigned rand_generation(void) { return (getpid()); }
  49
  50 /*----- That's all, folks -------------------------------------------------*/