libhermit-rs 0.6.3

A Rust-based library operating system
Documentation 
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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

use alloc::boxed::Box;

use hermit_sync::{InterruptTicketMutex, InterruptTicketMutexGuard, TicketMutex, TicketMutexGuard};

use crate::errno::*;

pub struct SpinlockContainer<'a> {
	lock: TicketMutex<()>,
	guard: Option<TicketMutexGuard<'a, ()>>,
}

pub struct SpinlockIrqSaveContainer<'a> {
	lock: InterruptTicketMutex<()>,
	guard: Option<InterruptTicketMutexGuard<'a, ()>>,
}

extern "C" fn __sys_spinlock_init(lock: *mut *mut SpinlockContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let boxed_container = Box::new(SpinlockContainer {
		lock: TicketMutex::new(()),
		guard: None,
	});
	unsafe {
		*lock = Box::into_raw(boxed_container);
	}
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_init(lock: *mut *mut SpinlockContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_init(lock))
}

extern "C" fn __sys_spinlock_destroy(lock: *mut SpinlockContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	// Consume the lock into a box, which is then dropped.
	unsafe {
		drop(Box::from_raw(lock));
	}
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_destroy(lock: *mut SpinlockContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_destroy(lock))
}

extern "C" fn __sys_spinlock_lock(lock: *mut SpinlockContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let container = unsafe { &mut *lock };
	assert!(
		container.guard.is_none(),
		"Called sys_spinlock_lock when a lock is already held!"
	);
	container.guard = Some(container.lock.lock());
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_lock(lock: *mut SpinlockContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_lock(lock))
}

extern "C" fn __sys_spinlock_unlock(lock: *mut SpinlockContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let container = unsafe { &mut *lock };
	assert!(
		container.guard.is_some(),
		"Called sys_spinlock_unlock when no lock is currently held!"
	);
	container.guard = None;
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_unlock(lock: *mut SpinlockContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_unlock(lock))
}

extern "C" fn __sys_spinlock_irqsave_init(lock: *mut *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let boxed_container = Box::new(SpinlockIrqSaveContainer {
		lock: InterruptTicketMutex::new(()),
		guard: None,
	});
	unsafe {
		*lock = Box::into_raw(boxed_container);
	}
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_irqsave_init(lock: *mut *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_irqsave_init(lock))
}

extern "C" fn __sys_spinlock_irqsave_destroy(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	// Consume the lock into a box, which is then dropped.
	unsafe {
		drop(Box::from_raw(lock));
	}
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_irqsave_destroy(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_irqsave_destroy(lock))
}

extern "C" fn __sys_spinlock_irqsave_lock(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let container = unsafe { &mut *lock };
	assert!(
		container.guard.is_none(),
		"Called sys_spinlock_irqsave_lock when a lock is already held!"
	);
	container.guard = Some(container.lock.lock());
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_irqsave_lock(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_irqsave_lock(lock))
}

extern "C" fn __sys_spinlock_irqsave_unlock(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	if lock.is_null() {
		return -EINVAL;
	}

	let container = unsafe { &mut *lock };
	assert!(
		container.guard.is_some(),
		"Called sys_spinlock_irqsave_unlock when no lock is currently held!"
	);
	container.guard = None;
	0
}

#[no_mangle]
pub extern "C" fn sys_spinlock_irqsave_unlock(lock: *mut SpinlockIrqSaveContainer<'_>) -> i32 {
	kernel_function!(__sys_spinlock_irqsave_unlock(lock))
}