[PATCH] OS abstract out the random seed and value retrieval

[fio.git] / os-linux.h

diff --git a/os-linux.h b/os-linux.h
index f2df97d3bf2588f7dc1dae447ed27988097a2078..f9094cb437148929c336ac1cd109ef15300188de 100644 (file)
--- a/os-linux.h
+++ b/os-linux.h
@@ -20,6 +20,7 @@
 #define OS_MAP_ANON            (MAP_ANONYMOUS)
 
 typedef cpu_set_t os_cpu_mask_t;
+typedef struct drand48_data os_random_state_t;
 
 /*
  * we want fadvise64 really, but it's so tangled... later
@@ -99,4 +100,25 @@ static inline unsigned long long os_phys_mem(void)
        return (unsigned long long) pages * (unsigned long long) pagesize;
 }
 
+static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
+{
+       srand48_r(seed, rs);
+}
+
+static inline long os_random_long(os_random_state_t *rs)
+{
+       long val;
+
+       lrand48_r(rs, &val);
+       return val;
+}
+
+static inline double os_random_double(os_random_state_t *rs)
+{
+       double val;
+
+       drand48_r(rs, &val);
+       return val;
+}
+
 #endif