esp-idf/components/freertos/include
Darian Leung d465316f0b freertos: Fix event group task list race condition
FreeRTOS synchronization primitives (e.g., queues, eventgroups) use various event lists (i.e., task lists) to track what
tasks are blocked on a current primitive. Usually these event lists are accessed via one of the event lists functions
(such as vTask[PlaceOn|RemoveFrom]UnorderedEventList()), which in turn ensure that the global task list spinlock
(xTaskQueueMutex) is taken when accessing these lists.

However, some functions in event_groups.c manually traverse their event lists. Thus if a tick interrupt occurs on
another core during traversal and that tick interrupt unblocks a task on the event list being traversed, the event list
will be corrupted.

This commit modifies the following event_groups.c functions so that they take the global task list lock before
traversing their event list.

- xEventGroupSetBits()
- vEventGroupDelete()
2022-07-19 12:03:04 +08:00
..
esp_additions freertos: add return value to API vTaskGetSnapshot 2022-06-09 21:13:23 +05:30
freertos freertos: Fix event group task list race condition 2022-07-19 12:03:04 +08:00