1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// Copyright (C) 2024 Intel Corporation.
// Author(s): Zhao Liu <zhai1.liu@intel.com>
// SPDX-License-Identifier: GPL-2.0-or-later
use std::os::raw::{c_int, c_void};
use crate::{
bindings::{self, qemu_clock_get_ns, timer_del, timer_init_full, timer_mod, QEMUClockType},
callbacks::FnCall,
};
pub type Timer = bindings::QEMUTimer;
pub type TimerListGroup = bindings::QEMUTimerListGroup;
impl Timer {
pub const MS: u32 = bindings::SCALE_MS;
pub const US: u32 = bindings::SCALE_US;
pub const NS: u32 = bindings::SCALE_NS;
pub fn new() -> Self {
Default::default()
}
const fn as_mut_ptr(&self) -> *mut Self {
self as *const Timer as *mut _
}
pub fn init_full<'timer, 'opaque: 'timer, T, F>(
&'timer mut self,
timer_list_group: Option<&TimerListGroup>,
clk_type: ClockType,
scale: u32,
attributes: u32,
_cb: F,
opaque: &'opaque T,
) where
F: for<'a> FnCall<(&'a T,)>,
{
let _: () = F::ASSERT_IS_SOME;
/// timer expiration callback
unsafe extern "C" fn rust_timer_handler<T, F: for<'a> FnCall<(&'a T,)>>(
opaque: *mut c_void,
) {
// SAFETY: the opaque was passed as a reference to `T`.
F::call((unsafe { &*(opaque.cast::<T>()) },))
}
let timer_cb: unsafe extern "C" fn(*mut c_void) = rust_timer_handler::<T, F>;
// SAFETY: the opaque outlives the timer
unsafe {
timer_init_full(
self,
if let Some(g) = timer_list_group {
g as *const TimerListGroup as *mut _
} else {
::core::ptr::null_mut()
},
clk_type.id,
scale as c_int,
attributes as c_int,
Some(timer_cb),
(opaque as *const T).cast::<c_void>() as *mut c_void,
)
}
}
pub fn modify(&self, expire_time: u64) {
unsafe { timer_mod(self.as_mut_ptr(), expire_time as i64) }
}
pub fn delete(&self) {
unsafe { timer_del(self.as_mut_ptr()) }
}
}
impl Drop for Timer {
fn drop(&mut self) {
self.delete()
}
}
pub struct ClockType {
id: QEMUClockType,
}
impl ClockType {
pub fn get_ns(&self) -> u64 {
// SAFETY: cannot be created outside this module, therefore id
// is valid
(unsafe { qemu_clock_get_ns(self.id) }) as u64
}
}
pub const CLOCK_VIRTUAL: ClockType = ClockType {
id: QEMUClockType::QEMU_CLOCK_VIRTUAL,
};
|
