blob: ceb1e90be757f4bd6b1bb003dac486ff8c919a30 (
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
|
//===-- ProcessRunLock.h ----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_ProcessRunLock_h_
#define liblldb_ProcessRunLock_h_
// C Includes
#include <stdint.h>
#include <time.h>
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-defines.h"
#include "lldb/Host/Mutex.h"
#include "lldb/Host/Condition.h"
//----------------------------------------------------------------------
/// Enumerations for broadcasting.
//----------------------------------------------------------------------
namespace lldb_private {
//----------------------------------------------------------------------
/// @class ProcessRunLock ProcessRunLock.h "lldb/Host/ProcessRunLock.h"
/// @brief A class used to prevent the process from starting while other
/// threads are accessing its data, and prevent access to its data while
/// it is running.
//----------------------------------------------------------------------
class ProcessRunLock
{
public:
ProcessRunLock();
~ProcessRunLock();
bool ReadTryLock ();
bool ReadUnlock ();
bool SetRunning ();
bool TrySetRunning ();
bool SetStopped ();
class ProcessRunLocker
{
public:
ProcessRunLocker () :
m_lock (nullptr)
{
}
~ProcessRunLocker()
{
Unlock();
}
// Try to lock the read lock, but only do so if there are no writers.
bool
TryLock (ProcessRunLock *lock)
{
if (m_lock)
{
if (m_lock == lock)
return true; // We already have this lock locked
else
Unlock();
}
if (lock)
{
if (lock->ReadTryLock())
{
m_lock = lock;
return true;
}
}
return false;
}
protected:
void
Unlock ()
{
if (m_lock)
{
m_lock->ReadUnlock();
m_lock = nullptr;
}
}
ProcessRunLock *m_lock;
private:
DISALLOW_COPY_AND_ASSIGN(ProcessRunLocker);
};
protected:
lldb::rwlock_t m_rwlock;
bool m_running;
private:
DISALLOW_COPY_AND_ASSIGN(ProcessRunLock);
};
} // namespace lldb_private
#endif // liblldb_ProcessRunLock_h_
|
