1 files changed, 11 insertions, 0 deletions

diff --git a/tmk_core/common/action_layer.h b/tmk_core/common/action_layer.h
index b6da353cf..3a4b1e334 100644
--- a/tmk_core/common/action_layer.h
+++ b/tmk_core/common/action_layer.h
@@ -70,6 +70,17 @@ void layer_xor(uint32_t state);
 #define layer_debug()
 #endif
 
+/* pressed actions cache */
+#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
+/* The number of bits needed to represent the layer number: log2(32). */
+#define MAX_LAYER_BITS 5
+void update_source_layers_cache(keypos_t key, uint8_t layer);
+uint8_t read_source_layers_cache(keypos_t key);
+#endif
+action_t store_or_get_action(bool pressed, keypos_t key);
+
+/* return the topmost non-transparent layer currently associated with key */
+int8_t layer_switch_get_layer(keypos_t key);
 
 /* return action depending on current layer status */
 action_t layer_switch_get_action(keypos_t key);