Module task

Expand description

Task Management

Defines the Task structure and related types for the Strat9-OS scheduler.

Structs§

CpuContext: CPU context saved/restored during context switches.
ExtendedState: FPU/SSE/AVX extended state, saved and restored on context switch.
KernelStack: Kernel stack for a task
SyncUnsafeCell: A wrapper around UnsafeCell that implements Sync for TaskState
Task: Represents a single task/thread in the system
TaskId: Unique identifier for a task
UserStack: User stack for a task (when running in userspace)

ResumeKind: How this task must be resumed the next time the scheduler selects it.
TaskPriority: Priority levels for tasks
TaskState: State of a task in the scheduler

do_restore_first_task 🔒 ^⚠: First-task restore dispatcher. Like do_switch_context but without saving old state (there is no previous task).
do_switch_context 🔒 ^⚠: Context switch dispatcher. Picks the xsave or fxsave path based on host capabilities, then performs the full save/swap/restore sequence.
next_pid 🔒: Performs the next pid operation.
next_tid 🔒: Performs the next tid operation.
normalized_xcr0 🔒
restore_first_task_fxsave 🔒 ^⚠: rdi=frame_ptr, rsi=fpu_ptr
restore_first_task_xsave 🔒 ^⚠: rdi=frame_ptr, rsi=fpu_ptr, rdx=xcr0
switch_context_fxsave 🔒 ^⚠: rdi=old_rsp, rsi=new_rsp, rdx=old_fpu, rcx=new_fpu
switch_context_xsave 🔒 ^⚠: rdi=old_rsp, rsi=new_rsp, rdx=old_fpu, rcx=new_fpu, r8=new_xcr0, r9=old_xcr0
task_entry_trampoline^⚠: Trampoline for newly created tasks.
task_post_switch_enter 🔒