1 use core::{ 2 ffi::{c_int, c_longlong}, 3 ptr::null_mut, 4 }; 5 6 use crate::{ 7 kdebug, 8 syscall::{Syscall, SystemError}, 9 time::{sleep::nanosleep, TimeSpec}, 10 }; 11 12 use super::timekeeping::do_gettimeofday; 13 14 pub type PosixTimeT = c_longlong; 15 pub type PosixSusecondsT = c_int; 16 17 #[repr(C)] 18 #[derive(Default, Debug)] 19 pub struct PosixTimeval { 20 pub tv_sec: PosixTimeT, 21 pub tv_usec: PosixSusecondsT, 22 } 23 24 #[repr(C)] 25 #[derive(Default, Debug)] 26 /// 当前时区信息 27 pub struct PosixTimeZone { 28 /// 格林尼治相对于当前时区相差的分钟数 29 pub tz_minuteswest: c_int, 30 /// DST矫正时差 31 pub tz_dsttime: c_int, 32 } 33 34 /// 系统时区 暂时写定为东八区 35 pub const SYS_TIMEZONE: PosixTimeZone = PosixTimeZone { 36 tz_minuteswest: -480, 37 tz_dsttime: 0, 38 }; 39 40 impl Syscall { 41 /// @brief 休眠指定时间（单位：纳秒）（提供给C的接口） 42 /// 43 /// @param sleep_time 指定休眠的时间 44 /// 45 /// @param rm_time 剩余休眠时间（传出参数） 46 /// 47 /// @return Ok(i32) 0 48 /// 49 /// @return Err(SystemError) 错误码 50 pub fn nanosleep( 51 sleep_time: *const TimeSpec, 52 rm_time: *mut TimeSpec, 53 ) -> Result<usize, SystemError> { 54 if sleep_time == null_mut() { 55 return Err(SystemError::EFAULT); 56 } 57 let slt_spec = TimeSpec { 58 tv_sec: unsafe { *sleep_time }.tv_sec, 59 tv_nsec: unsafe { *sleep_time }.tv_nsec, 60 }; 61 62 let r: Result<usize, SystemError> = nanosleep(slt_spec).map(|slt_spec| { 63 if rm_time != null_mut() { 64 unsafe { *rm_time }.tv_sec = slt_spec.tv_sec; 65 unsafe { *rm_time }.tv_nsec = slt_spec.tv_nsec; 66 } 67 0 68 }); 69 70 return r; 71 } 72 73 /// 获取cpu时间 74 /// 75 /// todo: 该系统调用与Linux不一致，将来需要删除该系统调用！！！ 删的时候记得改C版本的libc 76 pub fn clock() -> Result<usize, SystemError> { 77 return Ok(super::timer::clock() as usize); 78 } 79 80 pub fn gettimeofday( 81 tv: *mut PosixTimeval, 82 _timezone: &PosixTimeZone, 83 ) -> Result<usize, SystemError> { 84 // TODO; 处理时区信息 85 kdebug!("enter sys_do_gettimeofday"); 86 if tv == null_mut() { 87 return Err(SystemError::EFAULT); 88 } 89 let posix_time = do_gettimeofday(); 90 unsafe { 91 (*tv).tv_sec = posix_time.tv_sec; 92 (*tv).tv_usec = posix_time.tv_usec; 93 } 94 kdebug!("exit sys_do_gettimeofday"); 95 return Ok(0); 96 } 97 } 98