6 files changed, 162 insertions, 15 deletions
diff --git a/app/include/linker/zmk-events.ld b/app/include/linker/zmk-events.ld
new file mode 100644
index 0000000..44063be
--- /dev/null
+++ b/app/include/linker/zmk-events.ld
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+ 
+#include <linker/linker-defs.h>
+
+        	__event_type_start = .; \
+        	KEEP(*(".event_type")); \
+        	__event_type_end = .; \
+
+        	__event_subscriptions_start = .; \
+        	KEEP(*(".event_subscription")); \
+        	__event_subscriptions_end = .; \
+
diff --git a/app/include/zmk/event-manager.h b/app/include/zmk/event-manager.h
new file mode 100644
index 0000000..2ef55e9
--- /dev/null
+++ b/app/include/zmk/event-manager.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+ 
+#pragma once
+
+#include <stddef.h>
+#include <kernel.h>
+#include <zephyr/types.h>
+
+struct zmk_event_type
+{
+    const char *name;
+};
+
+struct zmk_event_header {
+    const struct zmk_event_type* event;
+};
+
+typedef int (*zmk_listener_callback_t)(const struct zmk_event_header *eh);
+struct zmk_listener
+{
+    zmk_listener_callback_t callback;
+};
+
+struct zmk_event_subscription {
+    const struct zmk_event_type *event_type;
+    const struct zmk_listener *listener;
+};
+
+#define ZMK_EVENT_DECLARE(event_type) \
+    struct event_type* new_##event_type(); \
+    bool is_##event_type(const struct zmk_event_header *eh); \
+    const struct event_type* cast_##event_type(const struct zmk_event_header *eh); \
+    extern const struct zmk_event_type zmk_event_##event_type;
+
+#define ZMK_EVENT_IMPL(event_type) \
+    const struct zmk_event_type zmk_event_##event_type = { \
+        .name = STRINGIFY(event_type) \
+    }; \
+    const struct zmk_event_type* zmk_event_ref_##event_type __used __attribute__((__section__(".event_type"))) = &zmk_event_##event_type; \
+    struct event_type* new_##event_type() { \
+        struct event_type* ev = (struct event_type *) k_malloc(sizeof(struct event_type)); \
+        ev->header.event = &zmk_event_##event_type; \
+        return ev; \
+    }; \
+    bool is_##event_type(const struct zmk_event_header *eh) { \
+        return eh->event == &zmk_event_##event_type; \
+    }; \
+    const struct event_type* cast_##event_type(const struct zmk_event_header *eh) {\
+        return (const struct event_type*)eh; \
+    };
+    
+
+#define ZMK_LISTENER(mod, cb) \
+    const struct zmk_listener zmk_listener_##mod = { \
+        .callback = cb \
+    };
+
+#define ZMK_SUBSCRIPTION(mod, ev_type) \
+    const Z_DECL_ALIGN(struct zmk_event_subscription) _CONCAT(_CONCAT(zmk_event_sub_,mod),ev_type) __used __attribute__((__section__(".event_subscription"))) = { \
+        .event_type = &zmk_event_##ev_type, \
+        .listener = &zmk_listener_##mod, \
+    };
+
+#define ZMK_EVENT_RAISE(ev) \
+    zmk_event_manager_raise((struct zmk_event_header *)ev);
+
+int zmk_event_manager_raise(struct zmk_event_header *event);
diff --git a/app/include/zmk/events.h b/app/include/zmk/events.h
deleted file mode 100644
index 5be2beb..0000000
--- a/app/include/zmk/events.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#pragma once
-
-#include <zmk/keys.h>
-
-int zmk_events_position_pressed(u32_t position);
-int zmk_events_position_released(u32_t position);
-int zmk_events_keycode_pressed(u8_t usage_page, u32_t keycode);
-int zmk_events_keycode_released(u8_t usage_page, u32_t keycode);
-int zmk_events_modifiers_pressed(zmk_mod_flags modifiers);
-int zmk_events_modifiers_released(zmk_mod_flags modifiers);
-int zmk_events_consumer_key_pressed(u32_t usage);
-int zmk_events_consumer_key_released(u32_t usage);
-
-// TODO: Encoders?
-// TODO: Sensors?
-\ No newline at end of file
diff --git a/app/include/zmk/events/keycode-state-changed.h b/app/include/zmk/events/keycode-state-changed.h
new file mode 100644
index 0000000..1663f9b
--- /dev/null
+++ b/app/include/zmk/events/keycode-state-changed.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+ 
+#pragma once
+
+#include <zephyr.h>
+#include <zmk/event-manager.h>
+
+struct keycode_state_changed {
+    struct zmk_event_header header;
+    u8_t usage_page;
+    u32_t keycode;
+    bool state;
+};
+
+ZMK_EVENT_DECLARE(keycode_state_changed);
+
+inline struct keycode_state_changed* create_keycode_state_changed(u8_t usage_page, u32_t keycode, bool state)
+{
+    struct keycode_state_changed* ev = new_keycode_state_changed();
+    ev->usage_page = usage_page;
+    ev->keycode = keycode;
+    ev->state = state;
+
+    return ev;
+}
+\ No newline at end of file
diff --git a/app/include/zmk/events/modifiers-state-changed.h b/app/include/zmk/events/modifiers-state-changed.h
new file mode 100644
index 0000000..a17a093
--- /dev/null
+++ b/app/include/zmk/events/modifiers-state-changed.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+ 
+#pragma once
+
+#include <zephyr.h>
+#include <zmk/keys.h>
+#include <zmk/event-manager.h>
+
+struct modifiers_state_changed {
+    struct zmk_event_header header;
+    zmk_mod_flags modifiers;
+    bool state;
+};
+
+ZMK_EVENT_DECLARE(modifiers_state_changed);
+
+inline struct modifiers_state_changed* create_modifiers_state_changed(zmk_mod_flags modifiers, bool state)
+{
+    struct modifiers_state_changed* ev = new_modifiers_state_changed();
+    ev->modifiers = modifiers;
+    ev->state = state;
+
+    return ev;
+}
+\ No newline at end of file
diff --git a/app/include/zmk/events/position-state-changed.h b/app/include/zmk/events/position-state-changed.h
new file mode 100644
index 0000000..c91688e
--- /dev/null
+++ b/app/include/zmk/events/position-state-changed.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <zephyr.h>
+#include <zmk/event-manager.h>
+
+struct position_state_changed {
+    struct zmk_event_header header;
+    u32_t position;
+    bool state;
+};
+
+ZMK_EVENT_DECLARE(position_state_changed);
+\ No newline at end of file