dedupe: allow to generate dedupe buffers from working set

[fio.git] / lib / rand.h

diff --git a/lib/rand.h b/lib/rand.h
index 46c1c5e023a132513ded05d885bd5769dbf7ceb9..a806004504013bc41986b6d1b6dbd6f6067b0a91 100644 (file)
--- a/lib/rand.h
+++ b/lib/rand.h
@@ -150,6 +150,16 @@ static inline uint64_t rand_between(struct frand_state *state, uint64_t start,
                return start + rand32_upto(state, end - start);
 }
 
+static inline uint64_t __get_next_seed(struct frand_state *fs)
+{
+       uint64_t r = __rand(fs);
+
+       if (sizeof(int) != sizeof(long *))
+               r *= (unsigned long) __rand(fs);
+
+       return r;
+}
+
 extern void init_rand(struct frand_state *, bool);
 extern void init_rand_seed(struct frand_state *, uint64_t seed, bool);
 extern void __fill_random_buf(void *buf, unsigned int len, uint64_t seed);