1e41f4b71Sopenharmony_ci# timer.h 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 概述 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ci声明定时器的C接口。 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**系统能力：** SystemCapability.Resourceschedule.Ffrt.Core 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci**起始版本：** 12 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci**相关模块：**[FFRT](_f_f_r_t.md) 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ci## 汇总 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci### 函数 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci| 名称 | 描述 | 21e41f4b71Sopenharmony_ci| -------- | -------- | 22e41f4b71Sopenharmony_ci| FFRT_C_API [ffrt_timer_t](_f_f_r_t.md#ffrt_timer_t)[ffrt_timer_start](_f_f_r_t.md#ffrt_timer_start) ([ffrt_qos_t](_f_f_r_t.md) qos, uint64_t timeout, void\* data, [ffrt_timer_cb](_f_f_r_t.md#ffrt_timer_cb) cb, bool repeat) | 启动计时器。 | 23e41f4b71Sopenharmony_ci| FFRT_C_API int [ffrt_timer_stop](_f_f_r_t.md#ffrt_timer_stop) ([ffrt_qos_t](_f_f_r_t.md) qos, [ffrt_timer_t](_f_f_r_t.md#ffrt_timer_t) handle) | 关闭计时器。 | 24