17     abi::WaitOption, pid::PidType, resource::RUsage, Pid, ProcessControlBlock, ProcessManager,
25     pub pid: Pid,  field
35     pub pid: Pid,  field
41     pub fn new(pid_type: PidType, pid: Pid, options: WaitOption) -> Self {  in new()
44             pid,  in new()
55     mut pid: i64,  in kernel_wait4()
61     if pid == i64::MIN {  in kernel_wait4()
68     if pid == -1 {  in kernel_wait4()
70     } else if pid < 0 {  in kernel_wait4()
73         pid = -pid;  in kernel_wait4()
74     } else if pid == 0 {  in kernel_wait4()
77         pid = ProcessManager::current_pcb().pid().data() as i64;  in kernel_wait4()
82     let pid = Pid(pid as usize);  in kernel_wait4()  localVariable
85     let mut kwo = KernelWaitOption::new(pidtype, pid, options);  in kernel_wait4()
113         let child_pcb = ProcessManager::find(kwo.pid).ok_or(SystemError::ECHILD);  in do_wait()
155             for pid in rd_childen.iter() {  in do_wait()
156                 let pcb = ProcessManager::find(*pid).ok_or(SystemError::ECHILD)?;  in do_wait()
161                     unsafe { ProcessManager::release(pid.clone()) };  in do_wait()
162                     return Ok(pid.clone().into());  in do_wait()
192                         pid: child_pcb.pid(),  in do_waitpid()
219                     pid: child_pcb.pid(),  in do_waitpid()
225             return Some(Ok(child_pcb.pid().data()));  in do_waitpid()
228             let pid = child_pcb.pid();  in do_waitpid()  localVariable
239                     pid,  in do_waitpid()
249             unsafe { ProcessManager::release(pid) };  in do_waitpid()
250             return Some(Ok(pid.into()));  in do_waitpid()