# FFRT

<!--Kit: Function Flow Runtime Kit-->
<!--Subsystem: Resourceschedule-->
<!--Owner: @chuchihtung; @yanleo-->
<!--Designer: @geoffrey_guo; @huangyouzhong-->
<!--Tester: @lotsof; @sunxuhao-->
<!--Adviser: @foryourself-->

## Overview

Function Flow Runtime (FFRT) is a software runtime library that works with the Function Flow programming model. It is used to schedule and execute tasks of an application developed on the Function Flow programming model.

**Since**: 10
## Files

| Name| Description|
| -- | -- |
| [condition_variable.h](capi-condition-variable-h.md) | Declares the condition variable APIs in C.|
| [fiber.h](capi-fiber-h.md) | A fiber is a lightweight user mode thread that enables efficient task scheduling and context switching within the user space. The **fiber.h** file declares the related APIs in C.|
| [loop.h](capi-loop-h.md) | Declares the loop APIs in C.|
| [mutex.h](capi-mutex-h.md) | Declares the mutex APIs in C.|
| [queue.h](capi-queue-h.md) | Declares the queue APIs in C.|
| [shared_mutex.h](capi-shared-mutex-h.md) | Declares read-write lock APIs in C.|
| [sleep.h](capi-sleep-h.md) | Declares the sleep and yield APIs in C.|
| [task.h](capi-task-h.md) | Declares the task APIs in C.|
| [timer.h](capi-timer-h.md) | Declares the timer APIs in C.|
| [type_def.h](capi-type-def-h.md) | Declares the common types.|