Add generic random helpers

[fio.git] / os / os.h

diff --git a/os/os.h b/os/os.h
index 10e796fbcbe3313d1faee845bc26d751645aa011..9a48c603534d9629da59b0f533a5b20919d0150f 100644 (file)
--- a/os/os.h
+++ b/os/os.h
@@ -7,6 +7,8 @@
 #include "os-freebsd.h"
 #elif defined(__sun__)
 #include "os-solaris.h"
+#elif defined(__APPLE__)
+#include "os-mac.h"
 #else
 #error "unsupported os"
 #endif
@@ -106,4 +108,37 @@ static inline int os_cache_line_size(void)
 #endif
 }
 
+#ifdef FIO_USE_GENERIC_BDEV_SIZE
+static inline int blockdev_size(int fd, unsigned long long *bytes)
+{
+       off_t end;
+
+       *bytes = 0;
+
+       end = lseek(fd, 0, SEEK_END);
+       if (end < 0)
+               return errno;
+
+       *bytes = end;
+       return 0;
+}
+#endif
+
+#ifdef FIO_USE_GENERIC_RAND
+typedef unsigned int os_random_state_t;
+
+static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
+{
+       srand(seed);
+}
+
+static inline long os_random_long(os_random_state_t *rs)
+{
+       long val;
+
+       val = rand_r(rs);
+       return val;
+}
+#endif
+
 #endif