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/*
* 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;
u8_t last_listener_index;
};
#define ZMK_EV_EVENT_HANDLED 1
#define ZMK_EV_EVENT_CAPTURED 2
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); \
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; \
}; \
struct event_type* cast_##event_type(const struct zmk_event_header *eh) {\
return (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);
#define ZMK_EVENT_RAISE_AFTER(ev, mod) \
zmk_event_manager_raise_after((struct zmk_event_header *)ev, &zmk_listener_##mod);
#define ZMK_EVENT_RELEASE(ev) \
zmk_event_manager_release((struct zmk_event_header *)ev);
#define ZMK_EVENT_RELEASE_AGAIN(ev) \
zmk_event_manager_release_again((struct zmk_event_header *)ev);
int zmk_event_manager_raise(struct zmk_event_header *event);
int zmk_event_manager_raise_after(struct zmk_event_header *event, const struct zmk_listener *listener);
int zmk_event_manager_release(struct zmk_event_header *event);
int zmk_event_manager_release_again(struct zmk_event_header *event);
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