blob: 11f32dda22e1e7aff05990d1cba89c74fbccdd40 (
plain) (
blame)
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
|
#pragma once
#include "lfqueue.h"
#include <library/cpp/threading/atomic/bool.h>
#include <util/generic/vector.h>
#include <library/cpp/deprecated/atomic/atomic.h>
#include <library/cpp/deprecated/atomic/atomic_ops.h>
#include <util/system/event.h>
#include <util/system/spinlock.h>
namespace NNeh {
template <class T>
class TBlockedQueue: public TLockFreeQueue<T>, public TSystemEvent {
public:
inline TBlockedQueue() noexcept
: TSystemEvent(TSystemEvent::rAuto)
{
}
inline void Notify(T t) noexcept {
this->Enqueue(t);
Signal();
}
};
class TWaitQueue {
public:
struct TWaitHandle {
inline TWaitHandle() noexcept
: Signalled(false)
, Parent(nullptr)
{
}
inline void Signal() noexcept {
TGuard<TSpinLock> lock(M_);
Signalled = true;
if (Parent) {
Parent->Notify(this);
}
}
inline void Register(TWaitQueue* parent) noexcept {
TGuard<TSpinLock> lock(M_);
Parent = parent;
if (Signalled) {
if (Parent) {
Parent->Notify(this);
}
}
}
NAtomic::TBool Signalled;
TWaitQueue* Parent;
TSpinLock M_;
};
inline ~TWaitQueue() {
for (size_t i = 0; i < H_.size(); ++i) {
H_[i]->Register(nullptr);
}
}
inline void Register(TWaitHandle& ev) {
H_.push_back(&ev);
ev.Register(this);
}
template <class T>
inline void Register(const T& ev) {
Register(static_cast<TWaitHandle&>(*ev));
}
inline bool Wait(const TInstant& deadLine) noexcept {
return Q_.WaitD(deadLine);
}
inline void Notify(TWaitHandle* wq) noexcept {
Q_.Notify(wq);
}
inline bool Dequeue(TWaitHandle** wq) noexcept {
return Q_.Dequeue(wq);
}
private:
TBlockedQueue<TWaitHandle*> Q_;
TVector<TWaitHandle*> H_;
};
typedef TWaitQueue::TWaitHandle TWaitHandle;
template <class It, class T>
static inline void WaitForMultipleObj(It b, It e, const TInstant& deadLine, T& func) {
TWaitQueue hndl;
while (b != e) {
hndl.Register(*b++);
}
do {
TWaitHandle* ret = nullptr;
if (hndl.Dequeue(&ret)) {
do {
func(ret);
} while (hndl.Dequeue(&ret));
return;
}
} while (hndl.Wait(deadLine));
}
struct TSignalled {
inline TSignalled()
: Signalled(false)
{
}
inline void operator()(const TWaitHandle*) noexcept {
Signalled = true;
}
bool Signalled;
};
static inline bool WaitForOne(TWaitHandle& wh, const TInstant& deadLine) {
TSignalled func;
WaitForMultipleObj(&wh, &wh + 1, deadLine, func);
return func.Signalled;
}
}
|
