Mir
raii.h
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1 /*
2  * Copyright © 2013 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License version 3 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Alan Griffiths <alan@octopull.co.uk>
17  */
18 
19 #ifndef MIR_RAII_H_
20 #define MIR_RAII_H_
21 
22 #include <memory>
23 #include <type_traits>
24 
25 namespace mir
26 {
28 namespace raii
29 {
30 template <typename Creator, typename Deleter>
32 {
33  PairedCalls(Creator&& creator, Deleter&& deleter) : deleter(std::move(deleter)), owner(true) { creator(); }
34  PairedCalls(PairedCalls&& that) : deleter(that.deleter), owner(that.owner) { that.owner = false; }
35  ~PairedCalls() { if (owner) deleter(); }
36 private:
37  PairedCalls(PairedCalls const& that) = delete;
38  PairedCalls& operator=(PairedCalls const& that) = delete;
39  Deleter const deleter;
40  bool owner;
41 };
42 
52 template <typename Creator, typename Deleter>
53 inline auto paired_calls(Creator&& creator, Deleter&& deleter)
55 {
56  return {creator(), deleter};
57 }
58 
60 template <typename Creator, typename Deleter>
61 inline auto paired_calls(Creator&& creator, Deleter&& deleter)
62 -> typename std::enable_if<
63  std::is_void<decltype(creator())>::value,
64  PairedCalls<Creator, Deleter>>::type
65 {
66  return {std::move(creator), std::move(deleter)};
67 }
68 
76 template <typename Owned, typename Deleter>
77 inline auto deleter_for(Owned* owned, Deleter&& deleter)
78 -> std::unique_ptr<Owned, Deleter>
79 {
80  return {owned, deleter};
81 }
82 }
83 }
84 
85 #endif /* MIR_RAII_H_ */
All things Mir.
Definition: buffer_stream.h:37
STL namespace.
~PairedCalls()
Definition: raii.h:35
auto deleter_for(Owned *owned, Deleter &&deleter) -> std::unique_ptr< Owned, Deleter >
Creates an RAII object from an owning pointer and deleter.
Definition: raii.h:77
Definition: raii.h:31
true
Definition: display_configuration.cpp:30
PairedCalls(PairedCalls &&that)
Definition: raii.h:34
PairedCalls(Creator &&creator, Deleter &&deleter)
Definition: raii.h:33
MirSurfaceType type
Definition: mir_surface.h:448
auto paired_calls(Creator &&creator, Deleter &&deleter) -> std::unique_ptr< typename std::remove_reference< decltype(*creator())>::type, Deleter >
Creates an RAII object from a creator and deleter.
Definition: raii.h:53

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