pointer_hashmap.h File Reference

#include "hashmap.h"

Go to the source code of this file.

Macros
#define	HASHMAP(token)   hashmap_object2int##_##token
	Defines a hashmap type that maps void pointers to integers. To use this:
#define	K   void*
#define	V   int
#define	HASH_OF(key)   (size_t) key

Macro Definition Documentation

HASH_OF

#define HASH_OF

(

key

)

(size_t) key

HASHMAP

#define HASHMAP

(

token

)

hashmap_object2int##_##token

Defines a hashmap type that maps void pointers to integers. To use this:

Author

Peter Donovan (peter.nosp@m.dono.nosp@m.van@b.nosp@m.erke.nosp@m.ley.e.nosp@m.du)

#include "core/utils/impl/pointer_hashmap.h"

To create a new hashmap:

hashmap_object2int_t my_map = hashmap_object2int_new(CAPACITY, NOTHING);

where CAPACITY is the maximum capacity of the hashmap and NOTHING is a pointer key that is guaranteed to be never used (e.g., NULL). To put an entry into the hashmap:

hashmap_object2int_put(POINTER, VALUE);

where POINTER is a pointer not equal to NOTHING and VALUE is an integer. This will segfault if the hashmap is already at capacity.

To retrieve a value from the hashmap:

int value = hashmap_object2int_get(POINTER);

This will segfault if the entry is not in the hashmap.

See hashmap.h for documentation on how to declare other hashmap types.

K

#define K   void*

V

#define V   int