1e41f4b71Sopenharmony_ci# transient_task_api.h
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4e41f4b71Sopenharmony_ci## Overview
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6e41f4b71Sopenharmony_ciThe **transient_task_api.h** file declares the APIs for requesting, querying, and canceling transient tasks.
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8e41f4b71Sopenharmony_ci**Library**: libtransient_task.so
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10e41f4b71Sopenharmony_ci**System capability**: SystemCapability.ResourceSchedule.BackgroundTaskManager.TransientTask
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12e41f4b71Sopenharmony_ci**Since**: 13
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14e41f4b71Sopenharmony_ci**Related module**: [TransientTask](_transient_task.md)
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17e41f4b71Sopenharmony_ci## Summary
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20e41f4b71Sopenharmony_ci### Functions
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22e41f4b71Sopenharmony_ci| Name| Description| 
23e41f4b71Sopenharmony_ci| -------- | -------- |
24e41f4b71Sopenharmony_ci| int32_t [OH_BackgroundTaskManager_RequestSuspendDelay](_transient_task.md#oh_backgroundtaskmanager_requestsuspenddelay) (const char \*reason, [TransientTask_Callback](_transient_task.md#transienttask_callback) callback, [TransientTask_DelaySuspendInfo](_transient_task___delay_suspend_info.md) \*info) | Requests a transient task.| 
25e41f4b71Sopenharmony_ci| int32_t [OH_BackgroundTaskManager_GetRemainingDelayTime](_transient_task.md#oh_backgroundtaskmanager_getremainingdelaytime) (int32_t requestId, int32_t \*delayTime) | Obtains the remaining time of a transient task.| 
26e41f4b71Sopenharmony_ci| int32_t [OH_BackgroundTaskManager_CancelSuspendDelay](_transient_task.md#oh_backgroundtaskmanager_cancelsuspenddelay) (int32_t requestId) | Cancels a transient task.| 
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