output_buffer: only realloc once, and memset just what we need

[fio.git] / hash.h

diff --git a/hash.h b/hash.h
index 4b8c6bf0bcc49bd9b1f1b56c38c6e6b6243df22e..02b06140146b469abd05772406102fec845747fc 100644 (file)
--- a/hash.h
+++ b/hash.h
@@ -28,7 +28,9 @@
 #error Define GOLDEN_RATIO_PRIME for your wordsize.
 #endif
 
-static inline unsigned long hash_long(unsigned long val, unsigned int bits)
+#define GR_PRIME_64    0x9e37fffffffc0001ULL
+
+static inline unsigned long __hash_long(unsigned long val)
 {
        unsigned long hash = val;
 
@@ -52,8 +54,18 @@ static inline unsigned long hash_long(unsigned long val, unsigned int bits)
        hash *= GOLDEN_RATIO_PRIME;
 #endif
 
+       return hash;
+}
+
+static inline unsigned long hash_long(unsigned long val, unsigned int bits)
+{
        /* High bits are more random, so use them. */
-       return hash >> (BITS_PER_LONG - bits);
+       return __hash_long(val) >> (BITS_PER_LONG - bits);
+}
+
+static inline uint64_t __hash_u64(uint64_t val)
+{
+       return val * GR_PRIME_64;
 }
        
 static inline unsigned long hash_ptr(void *ptr, unsigned int bits)