harmony 鸿蒙task.h

2025-06-12
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task.h

Overview

The task.h file declares the task interfaces in C.

File to include: <ffrt/task.h>

Library: libffrt.z.so

System capability: SystemCapability.Resourceschedule.Ffrt.Core

Since: 10

Related module: FFRT

Summary

Functions

Name	Description
FFRT_C_API int ffrt_task_attr_init (ffrt_task_attr_t *attr)	Initializes a task attribute.
FFRT_C_API void ffrt_task_attr_set_name (ffrt_task_attr_t attr, const char name)	Sets a task name.
FFRT_C_API const char * ffrt_task_attr_get_name (const ffrt_task_attr_t *attr)	Obtains a task name.
FFRT_C_API void ffrt_task_attr_destroy (ffrt_task_attr_t *attr)	Destroys a task attribute.
FFRT_C_API void ffrt_task_attr_set_qos (ffrt_task_attr_t *attr, ffrt_qos_t qos)	Sets the task QoS.
FFRT_C_API ffrt_qos_t ffrt_task_attr_get_qos (const ffrt_task_attr_t *attr)	Obtains the task QoS.
FFRT_C_API void ffrt_task_attr_set_delay (ffrt_task_attr_t *attr, uint64_t delay_us)	Sets the task delay time.
FFRT_C_API uint64_t ffrt_task_attr_get_delay (const ffrt_task_attr_t *attr)	Obtains the task delay time.
FFRT_C_API void ffrt_task_attr_set_queue_priority (ffrt_task_attr_t *attr, ffrt_queue_priority_t priority)	Sets the task priority in the queue.
FFRT_C_API ffrt_queue_priority_t ffrt_task_attr_get_queue_priority (const ffrt_task_attr_t *attr)	Obtains the task priority in the queue.
FFRT_C_API void ffrt_task_attr_set_stack_size (ffrt_task_attr_t *attr, uint64_t size)	Sets the task stack size.
FFRT_C_API uint64_t ffrt_task_attr_get_stack_size (const ffrt_task_attr_t *attr)	Obtains the task stack size.
FFRT_C_API int ffrt_this_task_update_qos (ffrt_qos_t qos)	Updates the task QoS.
FFRT_C_API ffrt_qos_t ffrt_this_task_get_qos (void)	Obtains the task QoS.
FFRT_C_API uint64_t ffrt_this_task_get_id (void)	Obtains the ID of this task.
FFRT_C_API void * ffrt_alloc_auto_managed_function_storage_base (ffrt_function_kind_t kind)	Applies for memory for the function execution structure.
FFRT_C_API void ffrt_submit_base (ffrt_function_header_t f, const ffrt_deps_t in_deps, const ffrt_deps_t out_deps, const ffrt_task_attr_t attr)	Submits a task.
FFRT_C_API ffrt_task_handle_t ffrt_submit_h_base (ffrt_function_header_t f, const ffrt_deps_t in_deps, const ffrt_deps_t out_deps, const ffrt_task_attr_t attr)	Submits a task, and obtains the task handle.
FFRT_C_API uint32_t ffrt_task_handle_inc_ref (ffrt_task_handle_t handle)	Increases the number of task handle references.
FFRT_C_API uint32_t ffrt_task_handle_dec_ref (ffrt_task_handle_t handle)	Decreases the number of task handle references.
FFRT_C_API void ffrt_task_handle_destroy (ffrt_task_handle_t handle)	Destroys a task handle.
FFRT_C_API void ffrt_wait_deps (const ffrt_deps_t *deps)	Waits until the dependent tasks are complete.
FFRT_C_API void ffrt_wait (void)	Waits until all submitted tasks are complete.