Crate axtask

ArceOS task management module.

This module provides primitives for task management, including task creation, scheduling, sleeping, termination, etc. The scheduler algorithm is configurable by cargo features.

Cargo Features

• multitask: Enable multi-task support. If it’s enabled, complex task management and scheduling is used, as well as more task-related APIs. Otherwise, only a few APIs with naive implementation is available.
• irq: Interrupts are enabled. If this feature is enabled, timer-based APIs can be used, such as sleep, sleep_until, and WaitQueue::wait_timeout.
• preempt: Enable preemptive scheduling.
• sched_fifo: Use the FIFO cooperative scheduler. It also enables the multitask feature if it is enabled. This feature is enabled by default, and it can be overriden by other scheduler features.
• sched_rr: Use the Round-robin preemptive scheduler. It also enables the multitask and preempt features if it is enabled.
• sched_cfs: Use the Completely Fair Scheduler. It also enables the the multitask and preempt features if it is enabled.

Macros

def_task_ext

Define the task extended data.

Structs

CurrentTaskmultitask

A wrapper of AxTaskRef as the current task.

TaskIdmultitask

A unique identifier for a thread.

TaskInnermultitask

The inner task structure.

WaitQueuemultitask

A queue to store sleeping tasks.

Traits

TaskExtMutmultitask

A trait to convert TaskInner::task_ext_ptr to the mutable reference of the concrete type.

TaskExtRefmultitask

A trait to convert TaskInner::task_ext_ptr to the reference of the concrete type.

Functions

currentmultitask

Gets the current task.

current_may_uninitmultitask

Gets the current task, or returns None if the current task is not initialized.

exitmultitask

Exits the current task.

init_schedulermultitask

Initializes the task scheduler (for the primary CPU).

init_scheduler_secondarymultitask

Initializes the task scheduler for secondary CPUs.

on_timer_tickmultitask and irq

Handles periodic timer ticks for the task manager.

run_idlemultitask

The idle task routine.

set_current_affinitymultitask

Set the affinity for the current task. AxCpuMask is used to specify the CPU affinity. Returns true if the affinity is set successfully.

set_prioritymultitask

Set the priority for current task.

sleep

Current task is going to sleep for the given duration.

sleep_until

Current task is going to sleep, it will be woken up at the given deadline.

spawnmultitask

Spawns a new task with the default parameters.

spawn_rawmultitask

Spawns a new task with the given parameters.

spawn_taskmultitask

Adds the given task to the run queue, returns the task reference.

yield_now

Current task gives up the CPU time voluntarily, and switches to another ready task.

Type Aliases

AxCpuMaskmultitask

The wrapper type for [cpumask::CpuMask] with SMP configuration.

AxTaskRefmultitask

The reference type of a task.