/usr/include/mircommon/mir/raii.h is in libmircommon-dev 0.26.3+16.04.20170605-0ubuntu1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* Copyright © 2013 Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Alan Griffiths <alan@octopull.co.uk>
*/
#ifndef MIR_RAII_H_
#define MIR_RAII_H_
#include <memory>
#include <type_traits>
namespace mir
{
/// Utilities for exception safe use of paired function calls
namespace raii
{
template <typename Creator, typename Deleter>
struct PairedCalls
{
PairedCalls(Creator&& creator, Deleter&& deleter) : deleter(std::move(deleter)), owner(true) { creator(); }
PairedCalls(PairedCalls&& that) : deleter(that.deleter), owner(that.owner) { that.owner = false; }
~PairedCalls() { if (owner) deleter(); }
private:
PairedCalls(PairedCalls const& that) = delete;
PairedCalls& operator=(PairedCalls const& that) = delete;
Deleter const deleter;
bool owner;
};
/**
* Creates an RAII object from a creator and deleter.
* If creator returns a pointer type then the returned object
* is a std::unique_ptr initialized with the pointer and deleter.
* Otherwise, the returned object calls creator on construction and deleter on destruction
*
* \param creator called to initialize the returned object
* \param deleter called to finalize the returned object
*/
template <typename Creator, typename Deleter>
inline auto paired_calls(Creator&& creator, Deleter&& deleter)
-> std::unique_ptr<typename std::remove_reference<decltype(*creator())>::type, Deleter>
{
return {creator(), deleter};
}
///\overload
template <typename Creator, typename Deleter>
inline auto paired_calls(Creator&& creator, Deleter&& deleter)
-> typename std::enable_if<
std::is_void<decltype(creator())>::value,
PairedCalls<Creator, Deleter>>::type
{
return {std::move(creator), std::move(deleter)};
}
/**
* Creates an RAII object from an owning pointer and deleter.
* The returned object is a std::unique_ptr initialized with the pointer and deleter.
*
* \param owned the object to take ownership of
* \param deleter called to finalize the owned object
*/
template <typename Owned, typename Deleter>
inline auto deleter_for(Owned* owned, Deleter&& deleter)
-> std::unique_ptr<Owned, Deleter>
{
return {owned, deleter};
}
}
}
#endif /* MIR_RAII_H_ */
|