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
178
179
180
181
182
183
184
|
#pragma once
#include "fwd.h"
#include <library/cpp/messagebus/actor/actor.h>
#include <library/cpp/messagebus/misc/atomic_box.h>
#include <library/cpp/deprecated/enum_codegen/enum_codegen.h>
#include <util/generic/noncopyable.h>
#include <util/generic/ptr.h>
#include <util/thread/lfstack.h>
namespace NRainCheck {
struct ISubtaskListener {
virtual void SetDone() = 0;
virtual ~ISubtaskListener() {
}
};
struct TNopSubtaskListener: public ISubtaskListener {
void SetDone() override;
static TNopSubtaskListener Instance;
};
class TSubtaskCompletionFunc {
friend class TSubtaskCompletion;
typedef void (ITaskBase::*TFunc)(TSubtaskCompletion*);
TFunc Func;
public:
TSubtaskCompletionFunc()
: Func(nullptr)
{
}
TSubtaskCompletionFunc(void*)
: Func(nullptr)
{
}
template <typename TTask>
TSubtaskCompletionFunc(void (TTask::*func)(TSubtaskCompletion*))
: Func((TFunc)func)
{
static_assert((std::is_base_of<ITaskBase, TTask>::value), "expect (std::is_base_of<ITaskBase, TTask>::value)");
}
bool operator!() const {
return !Func;
}
};
template <typename T>
class TTaskFuture;
#define SUBTASK_STATE_MAP(XX) \
XX(CREATED, "Initial") \
XX(RUNNING, "Running") \
XX(DONE, "Completed") \
XX(CANCEL_REQUESTED, "Cancel requested, but still executing") \
XX(CANCELED, "Canceled") \
/**/
enum ESubtaskState {
SUBTASK_STATE_MAP(ENUM_VALUE_GEN_NO_VALUE)
};
ENUM_TO_STRING(ESubtaskState, SUBTASK_STATE_MAP)
class TSubtaskCompletion : TNonCopyable, public ISubtaskListener {
friend struct TTaskAccessor;
private:
TAtomicBox<ESubtaskState> State;
TTaskRunnerBase* volatile TaskRunner;
TSubtaskCompletionFunc CompletionFunc;
public:
TSubtaskCompletion()
: State(CREATED)
, TaskRunner()
{
}
~TSubtaskCompletion() override;
// Either done or cancel requested or cancelled
bool IsComplete() const {
ESubtaskState state = State.Get();
switch (state) {
case RUNNING:
return false;
case DONE:
return true;
case CANCEL_REQUESTED:
return false;
case CANCELED:
return true;
case CREATED:
Y_FAIL("not started");
default:
Y_FAIL("unknown value: %u", (unsigned)state);
}
}
void FireCompletionCallback(ITaskBase*);
void SetCompletionCallback(TSubtaskCompletionFunc func) {
CompletionFunc = func;
}
// Completed, but not cancelled
bool IsDone() const {
return State.Get() == DONE;
}
// Request cancel by actor
// Does nothing but marks task cancelled,
// and allows proceeding to next callback
void Cancel();
// called by service provider implementations
// must not be called by actor
void SetRunning(TTaskRunnerBase* parent);
void SetDone() override;
};
// See ISimpleTask, ICoroTask
class TTaskRunnerBase: public TAtomicRefCount<TTaskRunnerBase>, public NActor::TActor<TTaskRunnerBase> {
friend class NActor::TActor<TTaskRunnerBase>;
friend class TContinueFunc;
friend struct TTaskAccessor;
friend class TSubtaskCompletion;
private:
THolder<ITaskBase> Impl;
ISubtaskListener* const ParentTask;
// While task is running, it holds extra reference to self.
//bool HoldsSelfReference;
bool Done;
bool SetDoneCalled;
// Subtasks currently executed.
TVector<TSubtaskCompletion*> Pending;
void Act(NActor::TDefaultTag);
public:
// Construct task. Task is not automatically started.
TTaskRunnerBase(IEnv*, ISubtaskListener* parent, TAutoPtr<ITaskBase> impl);
~TTaskRunnerBase() override;
bool IsRunningInThisThread() const;
void AssertInThisThread() const;
static TTaskRunnerBase* CurrentTask();
static ITaskBase* CurrentTaskImpl();
TString GetStatusSingleLine();
protected:
//void RetainRef();
//void ReleaseRef();
ITaskBase* GetImplBase() {
return Impl.Get();
}
private:
// true if need to call again
virtual bool ReplyReceived() = 0;
};
class ITaskBase {
public:
virtual ~ITaskBase() {
}
};
// Check that current method executed inside some task.
bool AreWeInsideTask();
}
|
