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https://github.com/DragonOS-Community/DragonOS.git
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e28411791f
- 支持中断共享 - 把现有驱动程序移植到新的irq模块 - 使用`ProcessorId`标识处理器id - 尚未实现threaded_irq 性能上，edge irq flow handler里面，对于锁的使用，可能有点问题。为了获取/修改common data还有其他几个结构体的状态，进行了多次加锁和放锁，导致性能降低。这是接下来需要优化的点。
71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
use system_error::SystemError;
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use crate::{
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filesystem::vfs::{
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file::{File, FileMode},
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ROOT_INODE,
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},
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process::{Pid, ProcessManager},
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};
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use super::{ProcessFlags, __PROCESS_MANAGEMENT_INIT_DONE};
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pub fn current_pcb_flags() -> ProcessFlags {
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if unsafe { !__PROCESS_MANAGEMENT_INIT_DONE } {
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return ProcessFlags::empty();
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}
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return ProcessManager::current_pcb().flags().clone();
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}
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pub fn current_pcb_preempt_count() -> usize {
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if unsafe { !__PROCESS_MANAGEMENT_INIT_DONE } {
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return 0;
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}
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return ProcessManager::current_pcb().preempt_count();
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}
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/// @brief 初始化pid=1的进程的stdio
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pub fn stdio_init() -> Result<(), SystemError> {
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if ProcessManager::current_pcb().pid() != Pid(1) {
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return Err(SystemError::EPERM);
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}
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let tty_inode = ROOT_INODE()
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.lookup("/dev/tty0")
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.expect("Init stdio: can't find tty0");
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let stdin =
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File::new(tty_inode.clone(), FileMode::O_RDONLY).expect("Init stdio: can't create stdin");
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let stdout =
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File::new(tty_inode.clone(), FileMode::O_WRONLY).expect("Init stdio: can't create stdout");
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let stderr = File::new(tty_inode.clone(), FileMode::O_WRONLY | FileMode::O_SYNC)
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.expect("Init stdio: can't create stderr");
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/*
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按照规定，进程的文件描述符数组的前三个位置，分别是stdin, stdout, stderr
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*/
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assert_eq!(
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ProcessManager::current_pcb()
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.fd_table()
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.write()
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.alloc_fd(stdin, None)
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.unwrap(),
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0
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);
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assert_eq!(
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ProcessManager::current_pcb()
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.fd_table()
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.write()
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.alloc_fd(stdout, None)
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.unwrap(),
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1
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);
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assert_eq!(
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ProcessManager::current_pcb()
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.fd_table()
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.write()
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.alloc_fd(stderr, None)
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.unwrap(),
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2
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);
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return Ok(());
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}
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