An Event is a mechanism for communication between tasks and can be used for synchronization between tasks. In the multi-tasking environment, tasks often need to be synchronized, and a wait is a synchronization. Events can provide one-to-many, many-to-many synchronous operations. This article through the analysis of HongMeng light kernel event module source code, in-depth grasp of the use of events. The source code covered in this article, for example, the OpenHarmony Liteos-M kernel, is available on the open source site [link].

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