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57 lines
2.2 KiB
C
57 lines
2.2 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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#pragma once
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#include "task_timer.h"
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//! Internal state object. Each task that wants to execute timers should allocate their own
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//! instance of this object.
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typedef struct TaskTimerManager {
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PebbleMutex *mutex;
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//! List of timers that are currently running
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ListNode *running_timers;
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//! List of timers that are allocated but unscheduled
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ListNode *idle_timers;
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//! The next ID to assign to a new timer.
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TaskTimerID next_id;
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//! Externally provided semaphore that is given whenever the next timer to expire has changed.
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SemaphoreHandle_t semaphore;
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//! The callback we're currently executing, useful for debugging.
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void *current_cb;
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} TaskTimerManager;
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//! Initialize a passed in manager object.
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//! @param[in] semaphore a sempahore the TaskTimerManager should give if the next expiring timer
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//! has changed. The task event loop should block on this same semphore to
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//! handle timer updates in a timely fashion.
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void task_timer_manager_init(TaskTimerManager *manager, SemaphoreHandle_t semaphore);
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//! Execute any timers that are currently expired.
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//! @return the number of ticks until the next timer expires. If there are no timers running,
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//! returns portMAX_DELAY.
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TickType_t task_timer_manager_execute_expired_timers(TaskTimerManager *manager);
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//! Debugging interface to help understand why the task_timer exuction is stuck and what
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//! its stuck on.
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//! @return A pointer to the current callback that's running, NULL if no callback
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//! is currently running.
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void* task_timer_manager_get_current_cb(const TaskTimerManager *manager);
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