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86 lines
3.4 KiB
C
86 lines
3.4 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 "applib/app_timer.h"
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#include "applib/app_logging.h"
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#include "services/common/evented_timer.h"
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#include "syscall/syscall_internal.h"
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//! @file fw/applib/app_timer.c
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//!
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//! Surpise! All this is is a dumb wrapper around evented_timer!
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DEFINE_SYSCALL(AppTimer*, app_timer_register, uint32_t timeout_ms,
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AppTimerCallback callback,
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void* callback_data) {
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// No need to check callback_data, we only dereference it in userspace anyway.
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return (AppTimer*)(uintptr_t)evented_timer_register(timeout_ms, false, callback, callback_data);
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}
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DEFINE_SYSCALL(AppTimer*, app_timer_register_repeatable, uint32_t timeout_ms,
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AppTimerCallback callback,
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void* callback_data,
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bool repeating) {
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// No need to check callback_data, we only dereference it in userspace anyway.
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return (AppTimer*)(uintptr_t)evented_timer_register(timeout_ms,
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repeating,
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callback,
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callback_data);
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}
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DEFINE_SYSCALL(bool, app_timer_reschedule, AppTimer *timer, uint32_t new_timeout_ms) {
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if (PRIVILEGE_WAS_ELEVATED) {
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if (!evented_timer_exists((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Timer %u does not exist", (unsigned)timer);
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return (false);
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}
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if (!evented_timer_is_current_task((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Invalid timer %u used in app_timer_reschedule", (unsigned)timer);
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syscall_failed();
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}
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}
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return evented_timer_reschedule((EventedTimerID)timer, new_timeout_ms);
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}
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DEFINE_SYSCALL(void, app_timer_cancel, AppTimer *timer) {
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if (PRIVILEGE_WAS_ELEVATED) {
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if (!evented_timer_exists((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Timer %u does not exist", (unsigned)timer);
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return;
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}
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if (!evented_timer_is_current_task((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Invalid timer %u used in app_timer_reschedule", (unsigned)timer);
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syscall_failed();
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}
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}
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evented_timer_cancel((EventedTimerID)timer);
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}
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DEFINE_SYSCALL(void *, app_timer_get_data, AppTimer *timer) {
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if (PRIVILEGE_WAS_ELEVATED) {
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if (!evented_timer_exists((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Timer %u does not exist", (unsigned)timer);
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return NULL;
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}
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if (!evented_timer_is_current_task((EventedTimerID)timer)) {
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APP_LOG(APP_LOG_LEVEL_ERROR, "Invalid timer %u used in app_timer_reschedule", (unsigned)timer);
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syscall_failed();
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}
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}
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return evented_timer_get_data((EventedTimerID)timer);
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}
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