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eval: Refactor item_lock

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If I am not mistaking, this commit should not change any functionality.
This commit is contained in:
ZyX 2017-02-20 22:24:46 +03:00
parent f2c9fd312c
commit e2fbbb292f
3 changed files with 74 additions and 69 deletions
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101
src/nvim/eval.c
View File

@ -3112,68 +3112,71 @@ static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock)
static void item_lock(typval_T *tv, int deep, int lock)
{
static int recurse = 0;
list_T *l;
listitem_T *li;
dict_T *d;
hashitem_T *hi;
int todo;
if (recurse >= DICT_MAXNEST) {
EMSG(_("E743: variable nested too deep for (un)lock"));
return;
}
if (deep == 0)
if (deep == 0) {
return;
++recurse;
}
recurse++;
/* lock/unlock the item itself */
if (lock)
tv->v_lock |= VAR_LOCKED;
else
tv->v_lock &= ~VAR_LOCKED;
// lock/unlock the item itself
#define CHANGE_LOCK(var, lock) \
do { \
var = ((VarLockStatus[]) { \
[VAR_UNLOCKED] = (lock ? VAR_LOCKED : VAR_UNLOCKED), \
[VAR_LOCKED] = (lock ? VAR_LOCKED : VAR_UNLOCKED), \
[VAR_FIXED] = VAR_FIXED, \
})[var]; \
} while (0)
CHANGE_LOCK(tv->v_lock, lock);
switch (tv->v_type) {
case VAR_LIST:
if ((l = tv->vval.v_list) != NULL) {
if (lock)
l->lv_lock |= VAR_LOCKED;
else
l->lv_lock &= ~VAR_LOCKED;
if (deep < 0 || deep > 1)
/* recursive: lock/unlock the items the List contains */
for (li = l->lv_first; li != NULL; li = li->li_next)
item_lock(&li->li_tv, deep - 1, lock);
case VAR_LIST: {
list_T *const l = tv->vval.v_list;
if (l != NULL) {
CHANGE_LOCK(l->lv_lock, lock);
if (deep < 0 || deep > 1)
// Recursive: lock/unlock the items the List contains.
for (listitem_T *li = l->lv_first; li != NULL; li = li->li_next) {
item_lock(&li->li_tv, deep - 1, lock);
}
}
break;
}
break;
case VAR_DICT:
if ((d = tv->vval.v_dict) != NULL) {
if (lock)
d->dv_lock |= VAR_LOCKED;
else
d->dv_lock &= ~VAR_LOCKED;
if (deep < 0 || deep > 1) {
/* recursive: lock/unlock the items the List contains */
todo = (int)d->dv_hashtab.ht_used;
for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi) {
if (!HASHITEM_EMPTY(hi)) {
--todo;
item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
case VAR_DICT: {
dict_T *const d = tv->vval.v_dict;
if (d != NULL) {
CHANGE_LOCK(d->dv_lock, lock);
if (deep < 0 || deep > 1) {
// Recursive: lock/unlock the items the List contains.
int todo = (int)d->dv_hashtab.ht_used;
for (hashitem_T *hi = d->dv_hashtab.ht_array; todo > 0; hi++) {
if (!HASHITEM_EMPTY(hi)) {
todo--;
item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
}
}
}
}
break;
}
case VAR_NUMBER:
case VAR_FLOAT:
case VAR_STRING:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_SPECIAL: {
break;
}
case VAR_UNKNOWN: {
assert(false);
}
break;
case VAR_NUMBER:
case VAR_FLOAT:
case VAR_STRING:
case VAR_FUNC:
case VAR_PARTIAL:
case VAR_SPECIAL:
break;
case VAR_UNKNOWN:
assert(false);
}
--recurse;
#undef CHANGE_LOCK
recurse--;
}
/*
@ -6350,7 +6353,7 @@ dict_T *dict_alloc(void) FUNC_ATTR_NONNULL_RET
first_dict = d;
hash_init(&d->dv_hashtab);
d->dv_lock = 0;
d->dv_lock = VAR_UNLOCKED;
d->dv_scope = 0;
d->dv_refcount = 0;
d->dv_copyID = 0;
@ -20293,7 +20296,7 @@ void new_script_vars(scid_T id)
void init_var_dict(dict_T *dict, dictitem_T *dict_var, int scope)
{
hash_init(&dict->dv_hashtab);
dict->dv_lock = 0;
dict->dv_lock = VAR_UNLOCKED;
dict->dv_scope = scope;
dict->dv_refcount = DO_NOT_FREE_CNT;
dict->dv_copyID = 0;

28
src/nvim/eval_defs.h
View File

@ -30,8 +30,8 @@ typedef enum {
/// Variable lock status for typval_T.v_lock
typedef enum {
VAR_UNLOCKED = 0, ///< Not locked.
VAR_LOCKED, ///< User lock, can be unlocked.
VAR_FIXED, ///< Locked forever.
VAR_LOCKED = 1, ///< User lock, can be unlocked.
VAR_FIXED = 2, ///< Locked forever.
} VarLockStatus;
/// VimL variable types, for use in typval_T.v_type
@ -93,18 +93,18 @@ struct listwatch_S {
* Structure to hold info about a list.
*/
struct listvar_S {
listitem_T *lv_first; /* first item, NULL if none */
listitem_T *lv_last; /* last item, NULL if none */
int lv_refcount; /* reference count */
int lv_len; /* number of items */
listwatch_T *lv_watch; /* first watcher, NULL if none */
int lv_idx; /* cached index of an item */
listitem_T *lv_idx_item; /* when not NULL item at index "lv_idx" */
int lv_copyID; /* ID used by deepcopy() */
list_T *lv_copylist; /* copied list used by deepcopy() */
char lv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
list_T *lv_used_next; /* next list in used lists list */
list_T *lv_used_prev; /* previous list in used lists list */
listitem_T *lv_first; ///< First item, NULL if none.
listitem_T *lv_last; ///< Last item, NULL if none.
int lv_refcount; ///< Reference count.
int lv_len; ///< Number of items.
listwatch_T *lv_watch; ///< First watcher, NULL if none.
int lv_idx; ///< Index of a cached item, used for optimising repeated l[idx].
listitem_T *lv_idx_item; ///< When not NULL item at index "lv_idx".
int lv_copyID; ///< ID used by deepcopy().
list_T *lv_copylist; ///< Copied list used by deepcopy().
VarLockStatus lv_lock; ///< Zero, VAR_LOCKED, VAR_FIXED.
list_T *lv_used_next; ///< next list in used lists list.
list_T *lv_used_prev; ///< Previous list in used lists list.
};
// Static list with 10 items. Use init_static_list() to initialize.

14
test/functional/eval/changedtick_spec.lua
View File

@ -95,17 +95,19 @@ describe('b:changedtick', function()
redir_exec(':let b:'))
end)
it('fails to unlock b:changedtick', function()
-- Note:
-- - unlocking VAR_FIXED variables is not an error.
-- - neither VAR_FIXED variables are reported as locked by islocked().
-- So test mostly checks that b:changedtick status does not change.
eq(0, exc_exec('let d = b:'))
eq(1, funcs.islocked('b:changedtick'))
-- FIXME
-- eq(1, funcs.islocked('d.changedtick'))
eq(0, funcs.islocked('d.changedtick'))
eq('\nE46: Cannot change read-only variable "b:changedtick"',
redir_exec('unlockvar b:changedtick'))
-- FIXME
-- eq('\nE46: Cannot change read-only variable "b:changedtick"',
-- redir_exec('unlockvar d.changedtick'))
eq('',
redir_exec('unlockvar d.changedtick'))
eq(1, funcs.islocked('b:changedtick'))
-- eq(1, funcs.islocked('d.changedtick'))
eq(0, funcs.islocked('d.changedtick'))
end)
it('is being completed', function()
feed(':echo b:<Tab><Home>let cmdline="<End>"<CR>')