Import of the watch repository from Pebble

src/fw/drivers/task_watchdog.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+#include "freertos_types.h"
+#include "kernel/pebble_tasks.h"
+
+#define TASK_WATCHDOG_PRIORITY 0x1
+
+void task_watchdog_init(void);
+
+//! Feed the watchdog for a particular task. If a task doesn't call this function frequently
+//! enough and it's mask is set we will eventually trigger a reboot.
+void task_watchdog_bit_set(PebbleTask task);
+
+//! Feed all task watchdogs bits. Don't use this unless you have to, as ideally all tasks should be
+//! managing their own bits. If you're using this you're probably hacking around something awful.
+void task_watchdog_bit_set_all(void);
+
+//! @return bool Wether this task is being tracked by the task watchdog.
+bool task_watchdog_mask_get(PebbleTask task);
+
+//! Starts tracking a particular task using the task watchdog. The task must regularly call
+//! task_watchdog_bit_set if task_watchdog_mask_set is set.
+void task_watchdog_mask_set(PebbleTask task);
+
+//! Removes a task from the task watchdog. This task will no long need to call
+//! task_watchdog_bit_set regularly.
+void task_watchdog_mask_clear(PebbleTask task);
+
+//! Should only be called if the task_watchdog timer has been halted for some reason
+//! (For example, when we are in stop mode)
+void task_watchdog_step_elapsed_time_ms(uint32_t elapsed_ms);