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random: use get_random() instead of arc4random_buf() for non-bsd builds

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This commit is contained in:
Roland Conybeare 2023-10-04 15:50:40 -04:00
commit a26a6e4656
1 changed files with 19 additions and 2 deletions
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21
include/randomgen/random_seed.hpp
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@ -1,9 +1,14 @@
/* @file random_seed.hpp */
#include "indentlog/print/array.hpp"
//#include "indentlog/print/array.hpp"
#include <iostream>
#include <cstdint>
#include <stdlib.h>
#ifdef _BSD_SOURCE
# include <bsd/stdlib.h>
#else
# include <sys/random.h>
#endif
namespace xo {
namespace rng {
@ -20,10 +25,22 @@ namespace xo {
*/
template<typename T>
void random_seed(T * p_seed) {
# ifdef _BSD_SOURCE
/* NOTE: arc4random_buf() works on darwin/nix;
* probably need to do something else on intel linux
*/
arc4random_buf(p_seed, sizeof(*p_seed));
::arc4random_buf(p_seed, sizeof(*p_seed));
# else
/* avail flags: GRND_RANDOM | GRND_NONBLOCK */
while (::getrandom(p_seed, sizeof(*p_seed), 0) == -1) {
if (errno == EINTR) {
/* interrupted by signal, try again */
continue;
} else {
break;
}
}
# endif
} /*random_seed*/
template<typename T>