pointer_hashmap.h File Reference

Defines a hashmap type that maps void pointers to integers. More...

#include "hashmap.h"

Go to the source code of this file.

Macros
#define	HASH_OF(key)
#define	HASHMAP(token)
#define	K   void*
#define	V   int

Detailed Description

Defines a hashmap type that maps void pointers to integers.

Author

Peter Donovan (peterdonovan@berkeley.edu)

To use this:

#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.

Macro Definition Documentation

HASH_OF

#define HASH_OF

(

key

)

Value:

(size_t)key

HASHMAP

#define HASHMAP

(

token

)

Value:

hashmap_object2int##_##token

K

#define K   void*

V

#define V   int