-
Notifications
You must be signed in to change notification settings - Fork 7
Expand file tree
/
Copy pathEtchMonitor.cpp
More file actions
140 lines (117 loc) · 4.26 KB
/
EtchMonitor.cpp
File metadata and controls
140 lines (117 loc) · 4.26 KB
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
/* $Id$
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version
* 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "capu/os/NumericLimits.h"
#include "support/EtchMonitor.h"
EtchMonitor::EtchMonitor(EtchString description, EtchString initialValue) {
mDescription = description;
mValue = initialValue;
}
EtchMonitor::~EtchMonitor() {}
EtchString EtchMonitor::getDescription() {
return mDescription;
}
EtchString EtchMonitor::get() {
return mValue;
}
status_t EtchMonitor::set(EtchString value, EtchString& oldValue) {
mMutex.lock();
oldValue = mValue;
mValue = value;
mCv.broadcast();
mMutex.unlock();
return ETCH_OK;
}
status_t EtchMonitor::waitUntilEqAndSet(const EtchString& desiredValue, EtchString& newValue, EtchString &old) {
return waitUntilEqAndSet(desiredValue, 0, newValue, old);
}
status_t EtchMonitor::waitUntilEqAndSet(const EtchString& desiredValue, capu::int32_t maxDelay, EtchString& newValue, EtchString &old) {
mMutex.lock();
if (waitUntilEqIntern(desiredValue, maxDelay) != ETCH_OK) {
mMutex.unlock();
return ETCH_TIMEOUT;
}
set(newValue, old);
mMutex.unlock();
return ETCH_OK;
}
status_t EtchMonitor::waitUntilEqIntern(const EtchString& desiredValue, capu::int32_t maxDelay) {
capu::uint64_t now = capu::Time::GetMilliseconds();
capu::uint64_t end = (maxDelay > 0) ? now + maxDelay : capu::NumericLimits::Max<capu::int64_t>();
capu::int64_t d = end - now;
while (!eq(mValue, desiredValue) && d > 0) {
mCv.wait(&mMutex, static_cast<capu::uint32_t>(d));
now = capu::Time::GetMilliseconds();
d = end - now;
}
if (!eq(mValue, desiredValue)) {
return ETCH_TIMEOUT;
}
return ETCH_OK;
}
status_t EtchMonitor::waitUntilEq(const EtchString& desiredValue) {
return waitUntilEq(desiredValue, 0);
}
status_t EtchMonitor::waitUntilEq(const EtchString& desiredValue, capu::int32_t maxDelay) {
status_t status;
mMutex.lock();
status = waitUntilEqIntern(desiredValue, maxDelay);
mMutex.unlock();
return status;
}
status_t EtchMonitor::waitUntilNotEqAndSet(const EtchString& undesiredValue, EtchString& newValue, EtchString& old) {
return waitUntilNotEqAndSet(undesiredValue, 0, newValue, old);
}
status_t EtchMonitor::waitUntilNotEqAndSet(const EtchString& undesiredValue, capu::int32_t maxDelay, EtchString& newValue, EtchString& old) {
mMutex.lock();
EtchString str;
if (waitUntilNotEqIntern(undesiredValue, maxDelay, str) != ETCH_OK) {
mMutex.unlock();
return ETCH_TIMEOUT;
}
set(newValue, old);
mMutex.unlock();
return ETCH_OK;
}
status_t EtchMonitor::waitUntilNotEq(const EtchString& undesiredValue, EtchString& current) {
return waitUntilNotEq(undesiredValue, 0, current);
}
status_t EtchMonitor::waitUntilNotEq(const EtchString& undesiredValue, capu::uint32_t maxDelay, EtchString& current) {
status_t status;
mMutex.lock();
status = waitUntilNotEqIntern(undesiredValue, maxDelay, current);
mMutex.unlock();
return status;
}
status_t EtchMonitor::waitUntilNotEqIntern(const EtchString& undesiredValue, capu::uint32_t maxDelay, EtchString& current) {
capu::uint64_t now = capu::Time::GetMilliseconds();
capu::uint64_t end = (maxDelay > 0) ? now + maxDelay : capu::NumericLimits::Max<capu::int64_t>();
capu::int64_t d = end - now;
while (eq(mValue, undesiredValue) && d > 0) {
mCv.wait(&mMutex, static_cast<capu::uint32_t>(d));
now = capu::Time::GetMilliseconds();
d = end - now;
}
if (eq(mValue, undesiredValue)) {
return ETCH_TIMEOUT;
}
current = mValue;
return ETCH_OK;
}
capu::bool_t EtchMonitor::eq(const EtchString& v1, const EtchString& v2) {
return v1.equals(&v2);
}