blob: 98403c08692aa06a32db074f48b3de14ee763888 (
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
85
86
87
88
89
90
91
92
|
#ifndef _posix_EventChannelThreads_h
#define _sys_EventChannelThreads_h
/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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 <vector>
#include <Exception.h>
#include <sys/Time.h>
#include <sys/Monitor.h>
#include <sys/Thread.h>
#include <sys/AtomicCount.h>
#include "EventChannel.h"
namespace qpid {
namespace sys {
/**
Dynamic thread pool serving an EventChannel.
Threads run a loop { e = getEvent(); e->dispatch(); }
The size of the thread pool is automatically adjusted to optimal size.
*/
class EventChannelThreads :
public qpid::SharedObject<EventChannelThreads>,
public sys::Monitor, private sys::Runnable
{
public:
/** Create the thread pool and start initial threads. */
static EventChannelThreads::shared_ptr create(
EventChannel::shared_ptr channel
);
~EventChannelThreads();
/** Post event to the underlying channel */
void postEvent(Event& event) { channel->postEvent(event); }
/** Post event to the underlying channel Must not be 0. */
void postEvent(Event* event) { channel->postEvent(event); }
/**
* Terminate all threads.
*
* Returns immediately, use join() to wait till all threads are
* shut down.
*/
void shutdown();
/** Wait for all threads to terminate. */
void join();
private:
typedef std::vector<sys::Thread> Threads;
typedef enum {
RUNNING, TERMINATE_SENT, JOINING, SHUTDOWN
} State;
EventChannelThreads(EventChannel::shared_ptr underlyingChannel);
void addThread();
void run();
bool keepRunning();
void adjustThreads();
EventChannel::shared_ptr channel;
Threads workers;
sys::AtomicCount nWaiting;
State state;
Event terminate;
};
}}
#endif /*!_sys_EventChannelThreads_h*/
|
