83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/*
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* Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#pragma once
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#include <stddef.h>
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#include <kernel.h>
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#include <zephyr/types.h>
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struct zmk_event_type
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{
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const char *name;
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};
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struct zmk_event_header {
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const struct zmk_event_type* event;
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u8_t last_listener_index;
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};
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#define ZMK_EV_EVENT_HANDLED 1
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#define ZMK_EV_EVENT_CAPTURED 2
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typedef int (*zmk_listener_callback_t)(const struct zmk_event_header *eh);
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struct zmk_listener
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{
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zmk_listener_callback_t callback;
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};
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struct zmk_event_subscription {
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const struct zmk_event_type *event_type;
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const struct zmk_listener *listener;
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};
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#define ZMK_EVENT_DECLARE(event_type) \
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struct event_type* new_##event_type(); \
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bool is_##event_type(const struct zmk_event_header *eh); \
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struct event_type* cast_##event_type(const struct zmk_event_header *eh); \
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extern const struct zmk_event_type zmk_event_##event_type;
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#define ZMK_EVENT_IMPL(event_type) \
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const struct zmk_event_type zmk_event_##event_type = { \
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.name = STRINGIFY(event_type) \
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}; \
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const struct zmk_event_type* zmk_event_ref_##event_type __used __attribute__((__section__(".event_type"))) = &zmk_event_##event_type; \
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struct event_type* new_##event_type() { \
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struct event_type* ev = (struct event_type *) k_malloc(sizeof(struct event_type)); \
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ev->header.event = &zmk_event_##event_type; \
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return ev; \
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}; \
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bool is_##event_type(const struct zmk_event_header *eh) { \
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return eh->event == &zmk_event_##event_type; \
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}; \
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struct event_type* cast_##event_type(const struct zmk_event_header *eh) {\
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return (struct event_type*)eh; \
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};
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#define ZMK_LISTENER(mod, cb) \
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const struct zmk_listener zmk_listener_##mod = { \
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.callback = cb \
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};
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#define ZMK_SUBSCRIPTION(mod, ev_type) \
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const Z_DECL_ALIGN(struct zmk_event_subscription) _CONCAT(_CONCAT(zmk_event_sub_,mod),ev_type) __used __attribute__((__section__(".event_subscription"))) = { \
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.event_type = &zmk_event_##ev_type, \
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.listener = &zmk_listener_##mod, \
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};
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#define ZMK_EVENT_RAISE(ev) \
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zmk_event_manager_raise((struct zmk_event_header *)ev);
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#define ZMK_EVENT_RAISE_AFTER(ev, mod) \
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zmk_event_manager_raise_after((struct zmk_event_header *)ev, &zmk_listener_##mod);
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#define ZMK_EVENT_RELEASE(ev) \
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zmk_event_manager_release((struct zmk_event_header *)ev);
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int zmk_event_manager_raise(struct zmk_event_header *event);
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int zmk_event_manager_raise_after(struct zmk_event_header *event, const struct zmk_listener *listener);
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int zmk_event_manager_release(struct zmk_event_header *event);
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