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Make the default map size smaller.

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256 is pretty big. Now, set_t is always 32 bytes, giving 64 members for 64
bit machines and (probably) 128 members for 32 bit machines.
This commit is contained in:
Bill Currie 2012-12-07 20:41:23 +09:00
parent 39920a4ea7
commit dbcf8f3774
1 changed files with 10 additions and 5 deletions
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15
include/QF/set.h
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@ -36,6 +36,11 @@
*/ */
//@{ //@{
#define DEFMAP_SIZE ((32 - sizeof (struct set_s *) \
- sizeof (unsigned *) \
- sizeof (int) - sizeof (unsigned))\
/ sizeof (unsigned))
/** Represent a set using a bitmap. /** Represent a set using a bitmap.
When \a inverted is zero, ones in the bitmap represent members, but when When \a inverted is zero, ones in the bitmap represent members, but when
@ -44,11 +49,11 @@
set_t as a black box. set_t as a black box.
*/ */
typedef struct set_s { typedef struct set_s {
struct set_s *next; ///< private. for ALLOC struct set_s *next; ///< private. for ALLOC
int inverted; ///< if true, 0 indicates membership unsigned *map; ///< bitmap of set members
unsigned *map; ///< bitmap of set members int inverted; ///< if true, 0 indicates membership
unsigned size; ///< number of representable members unsigned size; ///< number of representable members
unsigned defmap[8]; ///< backing store for small sets unsigned defmap[DEFMAP_SIZE];///< backing store for small sets
} set_t; } set_t;
/** Represent the state of a scan through a set. /** Represent the state of a scan through a set.