blob: 51f86780c4ce3708ab064a2fb8f4ef2a7d839f5f (
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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/* ========================================
Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
======================================== */
#pragma once
#include <NeKit/Atom.h>
#include <NeKit/Config.h>
namespace Kernel {
enum {
kLockInvalid = 0,
kLockDone = 200,
kLockTimedOut = 300,
kLockCount = 3,
};
/// @brief Lock condition pointer.
typedef Boolean* LockPtr;
/// @brief Locking delegate class, hangs until limit.
/// @tparam N the amount of cycles to wait.
template <SizeT N>
class LockDelegate final {
public:
LockDelegate() = delete;
public:
explicit LockDelegate(LockPtr expr) {
auto spin = 0U;
while (spin < N) {
if (*expr) {
fLockStatus | kLockDone;
break;
}
++spin;
}
if (spin > N) fLockStatus | kLockTimedOut;
}
~LockDelegate() = default;
LockDelegate& operator=(const LockDelegate&) = delete;
LockDelegate(const LockDelegate&) = delete;
bool Done() { return fLockStatus[kLockDone] == kLockDone; }
bool HasTimedOut() { return fLockStatus[kLockTimedOut] != kLockTimedOut; }
private:
Atom<UInt> fLockStatus;
};
} // namespace Kernel
|
