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scopeguard.h
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3  * Copyright (C) 2016 The LibrePCB developers
4  * https://librepcb.org/
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14  * GNU General Public License for more details.
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18  */
19 
20 #ifndef LIBREPCB_SCOPEGUARD_H
21 #define LIBREPCB_SCOPEGUARD_H
22 
23 /*******************************************************************************
24  * Includes
25  ******************************************************************************/
26 #include <QtCore>
27 
28 #include <utility>
29 
30 /*******************************************************************************
31  * Namespace / Forward Declarations
32  ******************************************************************************/
33 namespace librepcb {
34 
35 /*******************************************************************************
36  * Class ScopeGuardBase
37  ******************************************************************************/
42 public:
43  ScopeGuardBase() noexcept : mActive(true) {}
44 
45  ScopeGuardBase(ScopeGuardBase&& rhs) noexcept : mActive(rhs.mActive) {
46  rhs.dismiss();
47  }
48 
52  void dismiss() noexcept { mActive = false; }
53 
54 protected:
59  ~ScopeGuardBase() = default;
60  bool mActive;
61 };
62 
63 /*******************************************************************************
64  * Class ScopeGuard
65  ******************************************************************************/
70 template <class Fun>
71 class ScopeGuard final : public ScopeGuardBase {
72 public:
73  ScopeGuard() = delete;
74  ScopeGuard(const ScopeGuard&) = delete;
75 
76  ScopeGuard(Fun f) noexcept : mF(std::move(f)) {}
77 
78  ScopeGuard(ScopeGuard&& rhs) noexcept
79  : ScopeGuardBase(std::move(rhs)), mF(std::move(rhs.mF)) {}
80 
84  ~ScopeGuard() noexcept {
85  if (mActive) {
86  try {
87  mF();
88  } catch (const std::exception& e) {
89  qFatal("Cleanup function threw an exception: %s", e.what());
90  }
91  }
92  }
93 
94  ScopeGuard& operator=(const ScopeGuard&) = delete;
95 
96 private:
97  Fun mF;
98 };
99 
103 template <class Fun>
105  return ScopeGuard<Fun>(std::move(f));
106 }
107 
108 /*******************************************************************************
109  * End of File
110  ******************************************************************************/
111 
112 } // namespace librepcb
113 
114 #endif // LIBREPCB_SCOPEGUARD_H
~ScopeGuard() noexcept
Definition: scopeguard.h:84
ScopeGuard< Fun > scopeGuard(Fun f)
Definition: scopeguard.h:104
Definition: scopeguard.h:71
ScopeGuard(Fun f) noexcept
Definition: scopeguard.h:76
void dismiss() noexcept
Definition: scopeguard.h:52
Definition: scopeguard.h:41
ScopeGuardBase() noexcept
Definition: scopeguard.h:43
ScopeGuard(ScopeGuard &&rhs) noexcept
Definition: scopeguard.h:78
bool mActive
Definition: scopeguard.h:60
Fun mF
Definition: scopeguard.h:97
ScopeGuard & operator=(const ScopeGuard &)=delete
ScopeGuardBase(ScopeGuardBase &&rhs) noexcept
Definition: scopeguard.h:45