* hashtab.h (struct htab): Add member return_allocation_failure.

(htab_try_create): New prototype.  Mention which functions may
	return NULL when this is used.
This commit is contained in:
Hans-Peter Nilsson 2000-11-04 07:48:51 +00:00
parent 74f832daf0
commit 82e7f05e13
2 changed files with 16 additions and 0 deletions

View file

@ -1,3 +1,9 @@
2000-11-04 Hans-Peter Nilsson <hp@bitrange.com>
* hashtab.h (struct htab): Add member return_allocation_failure.
(htab_try_create): New prototype. Mention which functions may
return NULL when this is used.
2000-11-03 Hans-Peter Nilsson <hp@bitrange.com>
* hashtab.h: Change void * to PTR where necessary.

View file

@ -98,6 +98,10 @@ struct htab
/* The following member is used for debugging. Its value is number
of collisions fixed for time of work with the hash table. */
unsigned int collisions;
/* This is non-zero if we are allowed to return NULL for function calls
that allocate memory. */
int return_allocation_failure;
};
typedef struct htab *htab_t;
@ -109,6 +113,12 @@ enum insert_option {NO_INSERT, INSERT};
extern htab_t htab_create PARAMS ((size_t, htab_hash,
htab_eq, htab_del));
/* This function is like htab_create, but may return NULL if memory
allocation fails, and also signals that htab_find_slot_with_hash and
htab_find_slot are allowed to return NULL when inserting. */
extern htab_t htab_try_create PARAMS ((size_t, htab_hash,
htab_eq, htab_del));
extern void htab_delete PARAMS ((htab_t));
extern void htab_empty PARAMS ((htab_t));