src/basic/random-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2010 Lennart Poettering
   8 ***/
   9
  10 #include <stdbool.h>
  11 #include <stddef.h>
  12 #include <stdint.h>
  13
  14 int acquire_random_bytes(void *p, size_t n, bool high_quality_required);
  15 void pseudorandom_bytes(void *p, size_t n);
  16 void random_bytes(void *p, size_t n);
  17 void initialize_srand(void);
  18
  19 static inline uint64_t random_u64(void) {
  20         uint64_t u;
  21         random_bytes(&u, sizeof(u));
  22         return u;
  23 }
  24
  25 static inline uint32_t random_u32(void) {
  26         uint32_t u;
  27         random_bytes(&u, sizeof(u));
  28         return u;
  29 }