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author | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2021-01-10 21:29:07 +0900 |
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committer | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2021-01-10 21:29:07 +0900 |
commit | c63552eab1a13c6c05e18d763c7acf3c4c5383ed (patch) | |
tree | 1f63c76555b9f291fa4e3f965c1ec728bc993452 /random.c | |
parent | 1e827d4cb579e8c38daeaccf89338352fa5518eb (diff) | |
download | ruby-c63552eab1a13c6c05e18d763c7acf3c4c5383ed.tar.gz |
Remove possibility of using same seeds
Diffstat (limited to 'random.c')
-rw-r--r-- | random.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -583,7 +583,7 @@ ruby_fill_random_bytes(void *seed, size_t size, int need_secure) static void fill_random_seed(uint32_t *seed, size_t cnt) { - static int n = 0; + static rb_atomic_t n = 0; #if defined HAVE_CLOCK_GETTIME struct timespec tv; #elif defined HAVE_GETTIMEOFDAY @@ -606,7 +606,7 @@ fill_random_seed(uint32_t *seed, size_t cnt) #if SIZEOF_TIME_T > SIZEOF_INT seed[0] ^= (uint32_t)((time_t)tv.tv_sec >> SIZEOF_INT * CHAR_BIT); #endif - seed[2] ^= getpid() ^ (n++ << 16); + seed[2] ^= getpid() ^ (ATOMIC_FETCH_ADD(n, 1) << 16); seed[3] ^= (uint32_t)(VALUE)&seed; #if SIZEOF_VOIDP > SIZEOF_INT seed[2] ^= (uint32_t)((VALUE)&seed >> SIZEOF_INT * CHAR_BIT); |