Basic support for dedupe

[fio.git] / lib / rand.h

diff --git a/lib/rand.h b/lib/rand.h
index 02e68585420b942fb7805375308a2f1d77ef91c8..8c35ab1fa2636655ca17cd0f868b8c2ffafd0336 100644 (file)
--- a/lib/rand.h
+++ b/lib/rand.h
@@ -1,11 +1,19 @@
 #ifndef FIO_RAND_H
 #define FIO_RAND_H
 
+#define FRAND_MAX      (-1U)
+
 struct frand_state {
        unsigned int s1, s2, s3;
 };
 
-extern struct frand_state __fio_rand_state;
+static inline void frand_copy(struct frand_state *dst,
+                             struct frand_state *src)
+{
+       dst->s1 = src->s1;
+       dst->s2 = src->s2;
+       dst->s3 = src->s3;
+}
 
 static inline unsigned int __rand(struct frand_state *state)
 {
@@ -19,7 +27,9 @@ static inline unsigned int __rand(struct frand_state *state)
 }
 
 extern void init_rand(struct frand_state *);
+extern void init_rand_seed(struct frand_state *, unsigned int seed);
 extern void __fill_random_buf(void *buf, unsigned int len, unsigned long seed);
-extern unsigned long fill_random_buf(void *buf, unsigned int len);
+extern unsigned long fill_random_buf(struct frand_state *, void *buf, unsigned int len);
+extern unsigned long fill_random_buf_percentage(struct frand_state *, void *buf, unsigned int percentage, unsigned int segment, unsigned int len);
 
 #endif