mirror of
https://github.com/google/pebble.git
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97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "util/list.h"
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#include "services/common/event_service.h"
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#include "kernel/kernel_applib_state.h"
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#include "event_service_client.h"
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#include "process_management/app_manager.h"
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#include "util/list.h"
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#include "applib/app_logging.h"
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#include "process_state/app_state/app_state.h"
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#include "process_state/worker_state/worker_state.h"
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#include "syscall/syscall.h"
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#include "system/logging.h"
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#include "system/passert.h"
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static EventServiceInfo *prv_get_state(void) {
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PebbleTask task = pebble_task_get_current();
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if (task == PebbleTask_App) {
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return app_state_get_event_service_state();
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} else if (task == PebbleTask_Worker) {
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return worker_state_get_event_service_state();
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} else if (task == PebbleTask_KernelMain) {
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return kernel_applib_get_event_service_state();
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} else {
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WTF;
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}
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}
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static int event_service_comparator(EventServiceInfo *a, EventServiceInfo *b) {
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return (b->type - a->type);
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}
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bool event_service_filter(ListNode *node, void *tp) {
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EventServiceInfo *info = (EventServiceInfo *)node;
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uint32_t type = (uint32_t)tp;
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return (info->type == type);
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}
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static void do_handle(EventServiceInfo *info, PebbleEvent *e) {
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PBL_ASSERTN(info->handler != NULL);
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info->handler(e, info->context);
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}
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void event_service_client_subscribe(EventServiceInfo *handler) {
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EventServiceInfo *state = prv_get_state();
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ListNode *list = &state->list_node;
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if (list_contains(list, &handler->list_node)) {
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PBL_LOG(LOG_LEVEL_DEBUG, "Event service handler already subscribed");
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return;
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}
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// Add to handlers list
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list_sorted_add(list, &handler->list_node, (Comparator)event_service_comparator, true);
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sys_event_service_client_subscribe(handler);
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}
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void event_service_client_unsubscribe(EventServiceInfo *handler) {
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EventServiceInfo *state = prv_get_state();
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ListNode *list = &state->list_node;
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if (!list_contains(list, &handler->list_node)) {
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PBL_LOG(LOG_LEVEL_DEBUG, "Event service handler not subscribed");
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return;
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}
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sys_event_service_client_unsubscribe(state, handler);
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}
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void event_service_client_handle_event(PebbleEvent *e) {
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EventServiceInfo *state = prv_get_state();
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const uintptr_t type = e->type;
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// find the first callback
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ListNode *handler = list_find(&state->list_node, event_service_filter, (void *) type);
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while (handler) {
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// find the next callback before we call the current one, because the CB may alter the list
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ListNode *next_handler = list_find_next(handler, event_service_filter, false, (void *) type);
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do_handle((EventServiceInfo *)handler, e);
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handler = next_handler;
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}
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sys_event_service_cleanup(e);
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}
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