blob: 66d465ca752134126955ea647edb9fbeb7b1c5a9 (
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
76
77
78
79
80
81
82
83
84
|
#ifndef _sys_apr_Condition_h
#define _sys_apr_Condition_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/apr/APRPool.h"
#include "qpid/sys/Mutex.h"
#include "qpid/sys/Time.h"
#include <sys/errno.h>
#include <boost/noncopyable.hpp>
#include <apr_thread_cond.h>
namespace qpid {
namespace sys {
/**
* A condition variable for thread synchronization.
*/
class Condition
{
public:
inline Condition();
inline ~Condition();
inline void wait(Mutex&);
inline bool wait(Mutex&, const AbsTime& absoluteTime);
inline void notify();
inline void notifyAll();
private:
apr_thread_cond_t* condition;
};
Condition::Condition() {
CHECK_APR_SUCCESS(apr_thread_cond_create(&condition, APRPool::get()));
}
Condition::~Condition() {
CHECK_APR_SUCCESS(apr_thread_cond_destroy(condition));
}
void Condition::wait(Mutex& mutex) {
CHECK_APR_SUCCESS(apr_thread_cond_wait(condition, mutex.mutex));
}
bool Condition::wait(Mutex& mutex, const AbsTime& absoluteTime){
// APR uses microseconds.
apr_status_t status =
apr_thread_cond_timedwait(
condition, mutex.mutex, Duration(now(), absoluteTime)/TIME_USEC);
if(status != APR_TIMEUP) CHECK_APR_SUCCESS(status);
return status == 0;
}
void Condition::notify(){
CHECK_APR_SUCCESS(apr_thread_cond_signal(condition));
}
void Condition::notifyAll(){
CHECK_APR_SUCCESS(apr_thread_cond_broadcast(condition));
}
}}
#endif /*!_sys_apr_Condition_h*/
|
