static __isl_give isl_id *id_alloc(isl_ctx *ctx, const char *name, void *user)
{
const char *copy = name ? strdup(name) : NULL;
isl_id *id;
if (name && !copy)
return NULL;
id = isl_alloc_type(ctx, struct isl_id);
if (!id)
goto error;
id->ctx = ctx;
isl_ctx_ref(id->ctx);
id->ref = 1;
id->name = copy;
id->user = user;
id->hash = isl_hash_init();
if (name)
id->hash = isl_hash_string(id->hash, name);
else
id->hash = isl_hash_builtin(id->hash, user);
return id;
error:
free((char *)copy);
return NULL;
}
__isl_give isl_id *isl_id_alloc(isl_ctx *ctx, const char *name, void *user)
{
struct isl_hash_table_entry *entry;
uint32_t id_hash;
struct isl_name_and_user nu = { name, user };
if (!ctx)
return NULL;
id_hash = isl_hash_init();
if (name)
id_hash = isl_hash_string(id_hash, name);
else
id_hash = isl_hash_builtin(id_hash, user);
entry = isl_hash_table_find(ctx, &ctx->id_table, id_hash,
isl_id_has_name_and_user, &nu, 1);
if (!entry)
return NULL;
if (entry->data)
return isl_id_copy(entry->data);
entry->data = id_alloc(ctx, name, user);
if (!entry->data)
ctx->id_table.n--;
return entry->data;
}
