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
|
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_V8THREADS_H_
#define V8_V8THREADS_H_
namespace v8 {
namespace internal {
class ThreadState {
public:
// Returns NULL after the last one.
ThreadState* Next();
enum List {FREE_LIST, IN_USE_LIST};
void LinkInto(List list);
void Unlink();
// Id of thread.
void set_id(ThreadId id) { id_ = id; }
ThreadId id() { return id_; }
// Should the thread be terminated when it is restored?
bool terminate_on_restore() { return terminate_on_restore_; }
void set_terminate_on_restore(bool terminate_on_restore) {
terminate_on_restore_ = terminate_on_restore;
}
// Get data area for archiving a thread.
char* data() { return data_; }
private:
explicit ThreadState(ThreadManager* thread_manager);
~ThreadState();
void AllocateSpace();
ThreadId id_;
bool terminate_on_restore_;
char* data_;
ThreadState* next_;
ThreadState* previous_;
ThreadManager* thread_manager_;
friend class ThreadManager;
};
// Defined in isolate.h.
class ThreadLocalTop;
class ThreadVisitor {
public:
// ThreadLocalTop may be only available during this call.
virtual void VisitThread(Isolate* isolate, ThreadLocalTop* top) = 0;
protected:
virtual ~ThreadVisitor() {}
};
class ThreadManager {
public:
void Lock();
void Unlock();
void ArchiveThread();
bool RestoreThread();
void FreeThreadResources();
bool IsArchived();
void Iterate(ObjectVisitor* v);
void IterateArchivedThreads(ThreadVisitor* v);
bool IsLockedByCurrentThread() {
return mutex_owner_.Equals(ThreadId::Current());
}
ThreadId CurrentId();
void TerminateExecution(ThreadId thread_id);
// Iterate over in-use states.
ThreadState* FirstThreadStateInUse();
ThreadState* GetFreeThreadState();
private:
ThreadManager();
~ThreadManager();
void DeleteThreadStateList(ThreadState* anchor);
void EagerlyArchiveThread();
Mutex mutex_;
ThreadId mutex_owner_;
ThreadId lazily_archived_thread_;
ThreadState* lazily_archived_thread_state_;
// In the following two lists there is always at least one object on the list.
// The first object is a flying anchor that is only there to simplify linking
// and unlinking.
// Head of linked list of free states.
ThreadState* free_anchor_;
// Head of linked list of states in use.
ThreadState* in_use_anchor_;
Isolate* isolate_;
friend class Isolate;
friend class ThreadState;
};
} } // namespace v8::internal
#endif // V8_V8THREADS_H_
|
