blob: 3b6bb17d99e4b6c14ea4c867472b919c6dae66f2 (
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
72
73
74
75
|
#ifndef QPID_HA_LOGPREFIX_H
#define QPID_HA_LOGPREFIX_H
/*
*
* 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/sys/Mutex.h>
#include <string>
#include <iosfwd>
namespace qpid {
namespace ha {
/**
* Thread safe string holder to hold a string that may be read and modified concurrently.
*/
class LogPrefix
{
public:
explicit LogPrefix(const std::string& s=std::string()) : prefix(s) {}
void set(const std::string& s) { sys::RWlock::ScopedWlock l(lock); prefix = s; }
std::string get() const { sys::RWlock::ScopedRlock l(lock); return prefix; }
LogPrefix& operator=(const std::string& s) { set(s); return *this; }
operator std::string() const { return get(); }
private:
// Undefined, not copyable.
LogPrefix(const LogPrefix& lp);
LogPrefix& operator=(const LogPrefix&);
mutable sys::RWlock lock;
std::string prefix;
};
std::ostream& operator<<(std::ostream& o, const LogPrefix& lp);
/**
* A two-part log prefix with a reference to a pre-prefix and a post-prefix.
* Operator << will print both parts, get/set just manage the post-prefix.
*/
class LogPrefix2 : public LogPrefix {
public:
const LogPrefix& prePrefix;
explicit LogPrefix2(const LogPrefix& lp, const std::string& s=std::string()) : LogPrefix(s), prePrefix(lp) {}
LogPrefix2& operator=(const std::string& s) { set(s); return *this; }
private:
// Undefined, not copyable.
LogPrefix2(const LogPrefix2& lp);
LogPrefix2& operator=(const LogPrefix2&);
};
std::ostream& operator<<(std::ostream& o, const LogPrefix2& lp);
}} // namespace qpid::ha
#endif /*!QPID_HA_LOGPREFIX_H*/
|
