1 | // [License]
|
---|
2 | // The Ariba-Underlay Copyright
|
---|
3 | //
|
---|
4 | // Copyright (c) 2008-2012, Institute of Telematics, UniversitÀt Karlsruhe (TH)
|
---|
5 | //
|
---|
6 | // Institute of Telematics
|
---|
7 | // UniversitÀt Karlsruhe (TH)
|
---|
8 | // Zirkel 2, 76128 Karlsruhe
|
---|
9 | // Germany
|
---|
10 | //
|
---|
11 | // Redistribution and use in source and binary forms, with or without
|
---|
12 | // modification, are permitted provided that the following conditions are
|
---|
13 | // met:
|
---|
14 | //
|
---|
15 | // 1. Redistributions of source code must retain the above copyright
|
---|
16 | // notice, this list of conditions and the following disclaimer.
|
---|
17 | // 2. Redistributions in binary form must reproduce the above copyright
|
---|
18 | // notice, this list of conditions and the following disclaimer in the
|
---|
19 | // documentation and/or other materials provided with the distribution.
|
---|
20 | //
|
---|
21 | // THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND
|
---|
22 | // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
---|
23 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
---|
24 | // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ARIBA PROJECT OR
|
---|
25 | // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
---|
26 | // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
---|
27 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
---|
28 | // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
---|
29 | // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
---|
30 | // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
---|
31 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
32 | //
|
---|
33 | // The views and conclusions contained in the software and documentation
|
---|
34 | // are those of the authors and should not be interpreted as representing
|
---|
35 | // official policies, either expressed or implied, of the Institute of
|
---|
36 | // Telematics.
|
---|
37 | // [License]
|
---|
38 |
|
---|
39 | /**
|
---|
40 | * @author Mario Hock <mario@omnifile.org>, Michael TÀnzer <neo@nhng.de>
|
---|
41 | */
|
---|
42 |
|
---|
43 | #include "unique_io_service.h"
|
---|
44 |
|
---|
45 | #include <boost/asio.hpp>
|
---|
46 | #include <boost/thread.hpp>
|
---|
47 |
|
---|
48 | namespace ariba {
|
---|
49 | namespace transport {
|
---|
50 | namespace detail {
|
---|
51 |
|
---|
52 | using namespace std;
|
---|
53 |
|
---|
54 |
|
---|
55 | /* init static members */
|
---|
56 | boost::asio::io_service* unique_io_service::asio_io_service = NULL;
|
---|
57 | int unique_io_service::asio_io_service_ref_count = 0;
|
---|
58 | boost::thread* unique_io_service::thread = NULL;
|
---|
59 | int unique_io_service::run_count = 0;
|
---|
60 | boost::mutex unique_io_service::thread_stopped_mutex;
|
---|
61 | boost::condition_variable unique_io_service::thread_stopped_cond;
|
---|
62 | bool unique_io_service::thread_stopped = true;
|
---|
63 |
|
---|
64 |
|
---|
65 | unique_io_service::unique_io_service():
|
---|
66 | running(false)
|
---|
67 | {
|
---|
68 | if ( asio_io_service_ref_count == 0 )
|
---|
69 | {
|
---|
70 | asio_io_service = new boost::asio::io_service();
|
---|
71 | }
|
---|
72 |
|
---|
73 | asio_io_service_ref_count++;
|
---|
74 | }
|
---|
75 |
|
---|
76 |
|
---|
77 |
|
---|
78 | unique_io_service::~unique_io_service()
|
---|
79 | {
|
---|
80 | assert( !running );
|
---|
81 |
|
---|
82 | asio_io_service_ref_count--;
|
---|
83 |
|
---|
84 | if ( asio_io_service_ref_count <= 0 )
|
---|
85 | {
|
---|
86 | delete asio_io_service;
|
---|
87 | asio_io_service = NULL;
|
---|
88 | }
|
---|
89 | }
|
---|
90 |
|
---|
91 |
|
---|
92 |
|
---|
93 | boost::asio::io_service & unique_io_service::get_asio_io_service()
|
---|
94 | {
|
---|
95 | assert(asio_io_service != NULL );
|
---|
96 |
|
---|
97 | return *asio_io_service;
|
---|
98 | }
|
---|
99 |
|
---|
100 |
|
---|
101 |
|
---|
102 | void unique_io_service::start()
|
---|
103 | {
|
---|
104 | assert(!running);
|
---|
105 |
|
---|
106 | boost::mutex::scoped_lock lock(thread_stopped_mutex);
|
---|
107 | if (thread_stopped)
|
---|
108 | {
|
---|
109 | thread_stopped = false;
|
---|
110 | thread = new boost::thread(&unique_io_service::thread_function);
|
---|
111 | }
|
---|
112 |
|
---|
113 | run_count++;
|
---|
114 | running = true;
|
---|
115 | }
|
---|
116 |
|
---|
117 |
|
---|
118 |
|
---|
119 | void unique_io_service::stop()
|
---|
120 | {
|
---|
121 | assert( running );
|
---|
122 |
|
---|
123 | running = false;
|
---|
124 | run_count--;
|
---|
125 |
|
---|
126 | if ( run_count == 0 )
|
---|
127 | {
|
---|
128 | asio_io_service->stop();
|
---|
129 |
|
---|
130 | boost::mutex::scoped_lock lock(thread_stopped_mutex);
|
---|
131 | while (!thread_stopped)
|
---|
132 | {
|
---|
133 | thread_stopped_cond.wait(lock);
|
---|
134 | }
|
---|
135 | delete thread;
|
---|
136 | }
|
---|
137 | }
|
---|
138 |
|
---|
139 |
|
---|
140 | void unique_io_service::thread_function()
|
---|
141 | {
|
---|
142 | asio_io_service->run();
|
---|
143 |
|
---|
144 | {
|
---|
145 | boost::mutex::scoped_lock lock(thread_stopped_mutex);
|
---|
146 | thread_stopped = true;
|
---|
147 | }
|
---|
148 | thread_stopped_cond.notify_one();
|
---|
149 | }
|
---|
150 |
|
---|
151 |
|
---|
152 | }}} // namespace ariba::transport::detail
|
---|