Struct os::task::process::ProcessControlBlockInner

pub struct ProcessControlBlockInner {
    pub is_zombie: bool,
    pub memory_set: MemorySet,
    pub parent: Option<Weak<ProcessControlBlock>>,
    pub children: Vec<Arc<ProcessControlBlock>>,
    pub exit_code: i32,
    pub fd_table: Vec<Option<Arc<dyn File + Send + Sync>>>,
    pub signals: SignalFlags,
    pub tasks: Vec<Option<Arc<TaskControlBlock>>>,
    pub task_res_allocator: RecycleAllocator,
    pub mutex_list: Vec<Option<Arc<dyn Mutex>>>,
    pub semaphore_list: Vec<Option<Arc<Semaphore>>>,
    pub condvar_list: Vec<Option<Arc<Condvar>>>,
}

Inner of Process Control Block

Fields

is_zombie: bool

is zombie?

memory_set: MemorySet

memory set(address space)

parent: Option<Weak<ProcessControlBlock>>

parent process

children: Vec<Arc<ProcessControlBlock>>

children process

exit_code: i32

exit code

fd_table: Vec<Option<Arc<dyn File + Send + Sync>>>

file descriptor table

signals: SignalFlags

signal flags

tasks: Vec<Option<Arc<TaskControlBlock>>>

tasks(also known as threads)

task_res_allocator: RecycleAllocator

task resource allocator

mutex_list: Vec<Option<Arc<dyn Mutex>>>

mutex list

semaphore_list: Vec<Option<Arc<Semaphore>>>

semaphore list

condvar_list: Vec<Option<Arc<Condvar>>>

condvar list

Implementations

impl ProcessControlBlockInner

pub fn get_user_token(&self) -> usize

get the address of app’s page table

pub fn alloc_fd(&mut self) -> usize

allocate a new file descriptor

pub fn alloc_tid(&mut self) -> usize

allocate a new task id

pub fn dealloc_tid(&mut self, tid: usize)

deallocate a task id

pub fn thread_count(&self) -> usize

the count of tasks(threads) in this process

pub fn get_task(&self, tid: usize) -> Arc<TaskControlBlock>

get a task with tid in this process