blob: cc2577d5fc7a5d9f530885501c11a71ac723a519 (
plain)
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
|
/*
*
* 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 "qpid/client/Bounds.h"
#include "qpid/log/Statement.h"
#include "qpid/sys/Waitable.h"
namespace qpid {
namespace client {
using sys::Waitable;
Bounds::Bounds(size_t maxSize) : max(maxSize), current(0) {}
bool Bounds::expand(size_t sizeRequired, bool block) {
if (!max) return true;
Waitable::ScopedLock l(lock);
if (block) {
Waitable::ScopedWait w(lock);
while (current + sizeRequired > max)
lock.wait();
}
current += sizeRequired;
return current <= max;
}
void Bounds::reduce(size_t size) {
if (!max || size == 0) return;
Waitable::ScopedLock l(lock);
assert(current >= size);
current -= std::min(size, current);
if (current < max && lock.hasWaiters()) {
lock.notifyAll();
}
}
size_t Bounds::getCurrentSize() {
Waitable::ScopedLock l(lock);
return current;
}
std::ostream& operator<<(std::ostream& out, const Bounds& bounds) {
out << "current=" << bounds.current << ", max=" << bounds.max << " [" << &bounds << "]";
return out;
}
void Bounds::setException(const sys::ExceptionHolder& e) {
Waitable::ScopedLock l(lock);
lock.setException(e);
lock.waitWaiters(); // Wait for waiting threads to exit.
}
}} // namespace qpid::client
|
