eerie-sys 0.3.1

Unsafe raw bindings to the IREE Compiler/Runtime
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
166
167
168
169
170
171
172
173
174
175
176
177

use core::ffi::{c_int, c_long, c_uint, c_void};

const PTHREAD_BUSY: c_int = 16;
const PTHREAD_TIMED_OUT: c_int = 110;

#[repr(C)]
pub struct timespec {
    tv_sec: c_long,
    tv_nsec: c_long,
}

#[inline]
unsafe fn lock_mutex(mutex: *mut c_uint) {
    loop {
        if try_lock_mutex(mutex) {
            return;
        }
        core::hint::spin_loop();
    }
}

#[inline]
unsafe fn try_lock_mutex(mutex: *mut c_uint) -> bool {
    critical_section::with(|_| {
        if unsafe { *mutex } == 0 {
            unsafe { *mutex = 1 };
            true
        } else {
            false
        }
    })
}

#[inline]
unsafe fn unlock_mutex(mutex: *mut c_uint) {
    critical_section::with(|_| unsafe {
        *mutex = 0;
    });
}

#[no_mangle]
pub unsafe extern "C" fn call_once(flag: *mut c_uint, func: Option<unsafe extern "C" fn()>) {
    let should_call = critical_section::with(|_| {
        if unsafe { *flag } == 0 {
            unsafe { *flag = 1 };
            true
        } else {
            false
        }
    });

    if should_call {
        if let Some(func) = func {
            unsafe { func() };
        }
    }
}

#[no_mangle]
pub unsafe extern "C" fn pthread_once(
    flag: *mut c_uint,
    func: Option<unsafe extern "C" fn()>,
) -> c_int {
    unsafe { call_once(flag, func) };
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_mutex_init(mutex: *mut c_uint, _attr: *const c_void) -> c_int {
    unsafe {
        *mutex = 0;
    }
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_mutex_destroy(_mutex: *mut c_uint) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_mutex_lock(mutex: *mut c_uint) -> c_int {
    unsafe { lock_mutex(mutex) };
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_mutex_trylock(mutex: *mut c_uint) -> c_int {
    if unsafe { try_lock_mutex(mutex) } {
        0
    } else {
        PTHREAD_BUSY
    }
}

#[no_mangle]
pub unsafe extern "C" fn pthread_mutex_unlock(mutex: *mut c_uint) -> c_int {
    unsafe { unlock_mutex(mutex) };
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_init(cond: *mut c_uint, _attr: *const c_void) -> c_int {
    unsafe {
        *cond = 0;
    }
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_destroy(_cond: *mut c_uint) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_broadcast(_cond: *mut c_uint) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_signal(_cond: *mut c_uint) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_wait(_cond: *mut c_uint, mutex: *mut c_uint) -> c_int {
    unsafe {
        unlock_mutex(mutex);
        lock_mutex(mutex);
    }
    // This bare-metal backend has no scheduler or blocking primitive. IREE's
    // no-thread runtime path should not rely on condvar waits; report timeout
    // instead of spinning forever if one is reached.
    PTHREAD_TIMED_OUT
}

#[no_mangle]
pub unsafe extern "C" fn pthread_cond_timedwait(
    _cond: *mut c_uint,
    mutex: *mut c_uint,
    _deadline: *const timespec,
) -> c_int {
    unsafe {
        unlock_mutex(mutex);
        lock_mutex(mutex);
    }
    PTHREAD_TIMED_OUT
}

#[no_mangle]
pub unsafe extern "C" fn pthread_condattr_init(attr: *mut c_uint) -> c_int {
    unsafe {
        *attr = 0;
    }
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_condattr_setclock(_attr: *mut c_uint, _clock: c_int) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn pthread_condattr_destroy(_attr: *mut c_uint) -> c_int {
    0
}

#[no_mangle]
pub unsafe extern "C" fn clock_gettime(_clock_id: c_int, ts: *mut timespec) -> c_int {
    if !ts.is_null() {
        unsafe {
            (*ts).tv_sec = 0;
            (*ts).tv_nsec = 0;
        }
    }
    0
}