Fix PRNG seeding in sb_rand_thread_init().

2017-01-05 10:07:08 +03:00
parent daa763adba
commit bfec6bd3d6
1 changed files with 4 additions and 4 deletions
--- a/sysbench/sb_rand.c
+++ b/sysbench/sb_rand.c
@ -170,10 +170,10 @@ void sb_rand_done(void)
 void sb_rand_thread_init(void)
 {
  /* We use libc PRNG to see xoroshiro128+ */
-  sb_rng_state[0] = ((((uint64_t) random()) % UINT32_MAX) << 32) |
-    (((uint64_t) random()) % UINT32_MAX);
-  sb_rng_state[1] = ((((uint64_t) random()) % UINT32_MAX) << 32) |
-    (((uint64_t) random()) % UINT32_MAX);
+  sb_rng_state[0] = (((uint64_t) random()) << 32) |
+    (((uint64_t) random()) & UINT32_MAX);
+  sb_rng_state[1] = (((uint64_t) random()) << 32) |
+    (((uint64_t) random()) & UINT32_MAX);
 }

 /*