diff options
Diffstat (limited to 'include/hashtab.h')
| -rw-r--r-- | include/hashtab.h | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/include/hashtab.h b/include/hashtab.h index 8871710..7fb31e4 100644 --- a/include/hashtab.h +++ b/include/hashtab.h @@ -38,6 +38,10 @@ extern "C" { #include <ansidecl.h> +#ifndef GTY +#define GTY(X) +#endif + /* The type for a hash code. */ typedef unsigned int hashval_t; @@ -63,12 +67,21 @@ typedef void (*htab_del) PARAMS ((void *)); htab_traverse. Return 1 to continue scan, 0 to stop. */ typedef int (*htab_trav) PARAMS ((void **, void *)); +/* Memory-allocation function, with the same functionality as calloc(). + Iff it returns NULL, the hash table implementation will pass an error + code back to the user, so if your code doesn't handle errors, + best if you use xcalloc instead. */ +typedef PTR (*htab_alloc) PARAMS ((size_t, size_t)); + +/* We also need a free() routine. */ +typedef void (*htab_free) PARAMS ((PTR)); + /* Hash tables are of the following type. The structure (implementation) of this type is not needed for using the hash tables. All work with hash table should be executed only through functions mentioned below. */ -struct htab +struct htab GTY(()) { /* Pointer to hash function. */ htab_hash hash_f; @@ -80,7 +93,7 @@ struct htab htab_del del_f; /* Table itself. */ - PTR *entries; + PTR * GTY ((use_param (""), length ("%h.size"))) entries; /* Current size (in entries) of the hash table */ size_t size; @@ -99,9 +112,9 @@ struct htab 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; + /* Pointers to allocate/free functions. */ + htab_alloc alloc_f; + htab_free free_f; }; typedef struct htab *htab_t; @@ -111,14 +124,14 @@ enum insert_option {NO_INSERT, INSERT}; /* The prototypes of the package functions. */ -extern htab_t htab_create PARAMS ((size_t, htab_hash, - htab_eq, htab_del)); +extern htab_t htab_create_alloc PARAMS ((size_t, htab_hash, + htab_eq, htab_del, + htab_alloc, htab_free)); + +/* Backward-compatibility functions. */ +extern htab_t htab_create PARAMS ((size_t, htab_hash, htab_eq, htab_del)); +extern htab_t htab_try_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)); |