diff options
| -rw-r--r-- | src/include/nodes/bitmapset.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/include/nodes/bitmapset.h b/src/include/nodes/bitmapset.h index b6f1a9e6e54..433df8a46d0 100644 --- a/src/include/nodes/bitmapset.h +++ b/src/include/nodes/bitmapset.h @@ -27,13 +27,25 @@ struct List; /* * Data representation + * + * Larger bitmap word sizes generally give better performance, so long as + * they're not wider than the processor can handle efficiently. We use + * 64-bit words if pointers are that large, else 32-bit words. */ +#if SIZEOF_VOID_P >= 8 + +#define BITS_PER_BITMAPWORD 64 +typedef uint64 bitmapword; /* must be an unsigned type */ +typedef int64 signedbitmapword; /* must be the matching signed type */ + +#else -/* The unit size can be adjusted by changing these three declarations: */ #define BITS_PER_BITMAPWORD 32 typedef uint32 bitmapword; /* must be an unsigned type */ typedef int32 signedbitmapword; /* must be the matching signed type */ +#endif + typedef struct Bitmapset { int nwords; /* number of words in array */ |