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threadedmsg.hh
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1/* -*- mia-c++ -*-
2 *
3 * This file is part of MIA - a toolbox for medical image analysis
4 * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
5 *
6 * MIA is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with MIA; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21#ifndef mia_core_threadedmsg_hh
22#define mia_core_threadedmsg_hh
23
24#include <ostream>
25
26#include <mia/core/defines.hh>
27
29
44class EXPORT_CORE CThreadMsgStream : public std::ostream
45{
46public:
52
58
64 template <typename OS>
65 static void set_master_stream(OS& master);
66private:
67 template <typename OS, typename placeholder> friend struct __dispatch_set_master_stream;
68
69 static void do_set_master_stream(std::ostream& master);
70
71
72 std::ostream& m_old;
73
74};
75
90template <typename OS, typename placeholder>
91struct __dispatch_set_master_stream {
92 static void apply(OS& master)
93 {
94 CThreadMsgStream::do_set_master_stream(master);
95 }
96
97};
98
99template <typename placeholder>
100struct __dispatch_set_master_stream<CThreadMsgStream, placeholder> {
101 static void apply(CThreadMsgStream& /*master*/)
102 {
103 static_assert(sizeof(placeholder) == 0,
104 "CThreadMsgStream can't be used as master stream because it would deadlock.");
105 }
106};
107
109
110template <typename OS>
112{
113 __dispatch_set_master_stream<OS, int>::apply(master);
114}
115
116
117
119
120#endif
This class is used to handle syncronizized output of logging output in a multi-threaded environment.
Definition: threadedmsg.hh:45
static void set_master_stream(OS &master)
Definition: threadedmsg.hh:111
#define NS_MIA_BEGIN
conveniance define to start the mia namespace
Definition: defines.hh:33
#define EXPORT_CORE
Macro to manage Visual C++ style dllimport/dllexport.
Definition: defines.hh:101
#define NS_MIA_END
conveniance define to end the mia namespace
Definition: defines.hh:36