18     abi::WaitOption, pid::PidType, resource::RUsage, Pid, ProcessControlBlock, ProcessManager,
26     pub pid: Pid,  field
37     pub pid: Pid,  field
43     pub fn new(pid_type: PidType, pid: Pid, options: WaitOption) -> Self {  in new()
46             pid,  in new()
57     mut pid: i64,  in kernel_wait4()
63     if pid == i64::MIN {  in kernel_wait4()
70     if pid == -1 {  in kernel_wait4()
72     } else if pid < 0 {  in kernel_wait4()
75         pid = -pid;  in kernel_wait4()
76     } else if pid == 0 {  in kernel_wait4()
79         pid = ProcessManager::current_pcb().pid().data() as i64;  in kernel_wait4()
84     let pid = Pid(pid as usize);  in kernel_wait4()  localVariable
87     let mut kwo = KernelWaitOption::new(pidtype, pid, options);  in kernel_wait4()
115         let child_pcb = ProcessManager::find(kwo.pid).ok_or(SystemError::ECHILD);  in do_wait()
156             for pid in rd_childen.iter() {  in do_wait()
157                 let pcb = ProcessManager::find(*pid).ok_or(SystemError::ECHILD)?;  in do_wait()
162                     unsafe { ProcessManager::release(*pid) };  in do_wait()
163                     return Ok((*pid).into());  in do_wait()
193                         pid: child_pcb.pid(),  in do_waitpid()
220                     pid: child_pcb.pid(),  in do_waitpid()
226             return Some(Ok(child_pcb.pid().data()));  in do_waitpid()
229             let pid = child_pcb.pid();  in do_waitpid()  localVariable
240                     pid,  in do_waitpid()
250             unsafe { ProcessManager::release(pid) };  in do_waitpid()
251             return Some(Ok(pid.into()));  in do_waitpid()