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Store bindings in a sorted list and lookup via binary search

Browse source 
To reduce allocation, the list_t of keys has been replaced
with a direct array of uint32_t.
This commit is contained in:
frsfnrrg 2018-07-15 10:27:45 -04:00
parent 8f32069740
commit 110d698807
3 changed files with 79 additions and 108 deletions
Download patch file Download diff file Expand all files Collapse all files

18
include/sway/config.h
View file

@ -26,12 +26,14 @@ struct sway_variable {
* A key binding and an associated command.
*/
struct sway_binding {
int order;
bool release;
bool locked;
bool bindcode;
list_t *keys; // sorted in ascending order
// key part
uint32_t *keys; // sorted in ascending order
size_t length;
uint32_t modifiers;
bool release;
// value part
int order;
bool locked;
char *command;
};
@ -467,14 +469,8 @@ int workspace_output_cmp_workspace(const void *a, const void *b);
int sway_binding_cmp(const void *a, const void *b);
int sway_binding_cmp_qsort(const void *a, const void *b);
int sway_binding_cmp_keys(const void *a, const void *b);
void free_sway_binding(struct sway_binding *sb);
struct sway_binding *sway_binding_dup(struct sway_binding *sb);
void load_swaybars();
void invoke_swaybar(struct bar_config *bar);

118
sway/commands/bind.c
View file

@ -20,53 +20,55 @@ void free_sway_binding(struct sway_binding *binding) {
return;
}
if (binding->keys) {
free_flat_list(binding->keys);
}
free(binding->keys);
free(binding->command);
free(binding);
}
static void *replace_binding(void *old_item, void *new_item) {
struct sway_binding *old_binding = (struct sway_binding *)old_item;
struct sway_binding *new_binding = (struct sway_binding *)new_item;
wlr_log(WLR_DEBUG, "overwriting old binding command '%s' with command '%s'",
old_binding->command, new_binding->command);
free_sway_binding(old_binding);
return new_item;
}
/**
* Returns true if the bindings have the same key and modifier combinations.
* Note that keyboard layout is not considered, so the bindings might actually
* not be equivalent on some layouts.
* Comparison function for bindings.
*
* Returns -1 if a < b, 0 if a == b, and 1 is a > b
*/
static bool binding_key_compare(struct sway_binding *binding_a,
struct sway_binding *binding_b) {
int sway_binding_cmp(const void *a, const void *b) {
const struct sway_binding *binding_a = (const struct sway_binding *)a;
const struct sway_binding *binding_b = (const struct sway_binding *)b;
if (binding_a->release != binding_b->release) {
return false;
return binding_a->release < binding_b->release ? -1 : 1;
}
if (binding_a->bindcode != binding_b->bindcode) {
return false;
if (binding_a->modifiers != binding_b->modifiers) {
return binding_a->modifiers < binding_b->modifiers ? -1 : 1;
}
if (binding_a->modifiers ^ binding_b->modifiers) {
return false;
}
if (binding_a->keys->length != binding_b->keys->length) {
return false;
if (binding_a->length != binding_b->length) {
return binding_a->length < binding_b->length ? -1 : 1;
}
// Keys are sorted
int keys_len = binding_a->keys->length;
for (int i = 0; i < keys_len; ++i) {
uint32_t key_a = *(uint32_t *)binding_a->keys->items[i];
uint32_t key_b = *(uint32_t *)binding_b->keys->items[i];
if (key_a != key_b) {
return false;
for (size_t i = 0; i < binding_a->length; ++i) {
if (binding_a->keys[i] != binding_b->keys[i]) {
return binding_a->keys[i] < binding_b->keys[i] ? -1 : 1;
}
}
return true;
return 0;
}
static int key_qsort_cmp(const void *keyp_a, const void *keyp_b) {
uint32_t key_a = **(uint32_t **)keyp_a;
uint32_t key_b = **(uint32_t **)keyp_b;
return (key_a < key_b) ? -1 : ((key_a > key_b) ? 1 : 0);
static int key_qsort_cmp(const void *pkey_a, const void *pkey_b) {
uint32_t a = *(uint32_t *)pkey_a;
uint32_t b = *(uint32_t *)pkey_b;
return (a < b) ? -1 : ((a > b) ? 1 : 0);
}
static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
@ -83,11 +85,11 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
return cmd_results_new(CMD_FAILURE, bindtype,
"Unable to allocate binding");
}
binding->keys = create_list();
binding->keys = NULL;
binding->length = 0;
binding->modifiers = 0;
binding->release = false;
binding->locked = false;
binding->bindcode = bindcode;
// Handle --release and --locked
while (argc > 0) {
@ -111,19 +113,31 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
binding->command = join_args(argv + 1, argc - 1);
list_t *split = split_string(argv[0], "+");
int nonmodifiers = 0;
for (int i = 0; i < split->length; ++i) {
// Check for a modifier key
uint32_t mod;
if ((mod = get_modifier_mask_by_name(split->items[i])) > 0) {
binding->modifiers |= mod;
continue;
} else {
nonmodifiers++;
}
}
binding->keys = (uint32_t *)calloc(nonmodifiers, sizeof (uint32_t));
if (!binding->keys) {
return cmd_results_new(CMD_FAILURE, bindtype,
"Unable to allocate binding key list");
}
for (int i = 0; i < split->length; ++i) {
// Check for a modifier key
if (get_modifier_mask_by_name(split->items[i]) > 0) {
continue;
}
xkb_keycode_t keycode;
xkb_keysym_t keysym;
if (bindcode) {
// parse keycode
keycode = (int)strtol(split->items[i], NULL, 10);
xkb_keycode_t keycode = strtol(split->items[i], NULL, 10);
if (!xkb_keycode_is_legal_ext(keycode)) {
error =
cmd_results_new(CMD_INVALID, "bindcode",
@ -132,9 +146,10 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
list_free(split);
return error;
}
binding->keys[binding->length++] = (uint32_t)keycode;
} else {
// Check for xkb key
keysym = xkb_keysym_from_name(split->items[i],
xkb_keysym_t keysym = xkb_keysym_from_name(split->items[i],
XKB_KEYSYM_CASE_INSENSITIVE);
// Check for mouse binding
@ -149,28 +164,14 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
free_flat_list(split);
return ret;
}
binding->keys[binding->length++] = (uint32_t)keysym;
}
uint32_t *key = calloc(1, sizeof(uint32_t));
if (!key) {
free_sway_binding(binding);
free_flat_list(split);
return cmd_results_new(CMD_FAILURE, bindtype,
"Unable to allocate binding");
}
if (bindcode) {
*key = (uint32_t)keycode;
} else {
*key = (uint32_t)keysym;
}
list_add(binding->keys, key);
}
free_flat_list(split);
binding->order = binding_order++;
// sort ascending
list_qsort(binding->keys, key_qsort_cmp);
qsort(binding->keys, binding->length, sizeof(uint32_t), key_qsort_cmp);
list_t *mode_bindings;
if (bindcode) {
@ -179,22 +180,7 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
mode_bindings = config->current_mode->keysym_bindings;
}
// overwrite the binding if it already exists
bool overwritten = false;
for (int i = 0; i < mode_bindings->length; ++i) {
struct sway_binding *config_binding = mode_bindings->items[i];
if (binding_key_compare(binding, config_binding)) {
wlr_log(WLR_DEBUG, "overwriting old binding with command '%s'",
config_binding->command);
free_sway_binding(config_binding);
mode_bindings->items[i] = binding;
overwritten = true;
}
}
if (!overwritten) {
list_add(mode_bindings, binding);
}
list_sortedset_insert(mode_bindings, binding, sway_binding_cmp, replace_binding);
wlr_log(WLR_DEBUG, "%s - Bound %s to command %s",
bindtype, argv[0], binding->command);

51
sway/input/keyboard.c
View file

@ -65,10 +65,10 @@ static void update_shortcut_state(struct sway_shortcut_state *state,
bool last_key_was_a_modifier = raw_modifiers != state->last_raw_modifiers;
state->last_raw_modifiers = raw_modifiers;
if (last_key_was_a_modifier && state->last_keycode) {
// Last pressed key before this one was a modifier
state_erase_key(state, state->last_keycode);
}
if (last_key_was_a_modifier && state->last_keycode) {
// Last pressed key before this one was a modifier
state_erase_key(state, state->last_keycode);
}
if (event->state == WLR_KEY_PRESSED) {
// Add current key to set; there may be duplicates
@ -86,36 +86,25 @@ static void update_shortcut_state(struct sway_shortcut_state *state,
static void get_active_binding(const struct sway_shortcut_state *state,
list_t *bindings, struct sway_binding **current_binding,
uint32_t modifiers, bool release, bool locked) {
for (int i = 0; i < bindings->length; ++i) {
struct sway_binding *binding = bindings->items[i];
struct sway_binding match_binding = {
(uint32_t *)state->pressed_keys, state->npressed, modifiers, release,
0, false, NULL
};
if (modifiers ^ binding->modifiers ||
state->npressed != (size_t)binding->keys->length ||
locked > binding->locked ||
release != binding->release) {
continue;
}
bool match = true;
for (size_t j = 0; j < state->npressed; j++) {
uint32_t key = *(uint32_t *)binding->keys->items[j];
if (key != state->pressed_keys[j]) {
match = false;
break;
}
}
if (!match) {
continue;
}
if (*current_binding && *current_binding != binding) {
wlr_log(WLR_DEBUG, "encountered duplicate bindings %d and %d",
(*current_binding)->order, binding->order);
} else {
*current_binding = binding;
}
int index = list_sortedset_find(bindings, sway_binding_cmp, &match_binding);
if (index < 0) {
return;
}
struct sway_binding *binding = bindings->items[index];
if (locked > binding->locked) {
return;
}
if (*current_binding && *current_binding != binding) {
wlr_log(WLR_DEBUG, "encountered duplicate bindings %d and %d",
(*current_binding)->order, binding->order);
} else {
*current_binding = binding;
}
}
/**