blob: 4039eb756bad6bb89817b30ebbeb6c34a1795249 (
plain)
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
|
// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2016, Linaro Limited
* All rights reserved.
*/
#include <assert.h>
#include <kernel/spinlock.h>
#include "thread_private.h"
void spinlock_count_incr(void)
{
struct thread_core_local *l = thread_get_core_local();
l->locked_count++;
assert(l->locked_count);
}
void spinlock_count_decr(void)
{
struct thread_core_local *l = thread_get_core_local();
assert(l->locked_count);
l->locked_count--;
}
bool have_spinlock(void)
{
struct thread_core_local *l;
if (!thread_foreign_intr_disabled()) {
/*
* Normally we can't be holding a spinlock since doing so would
* imply foreign interrupts are disabled (or the spinlock
* logic is flawed).
*/
return false;
}
l = thread_get_core_local();
return !!l->locked_count;
}
|