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-rwxr-xr-xzen/scope_guard.h242
1 files changed, 121 insertions, 121 deletions
diff --git a/zen/scope_guard.h b/zen/scope_guard.h
index 62552f7b..b336ad53 100755
--- a/zen/scope_guard.h
+++ b/zen/scope_guard.h
@@ -1,121 +1,121 @@
-// *****************************************************************************
-// * This file is part of the FreeFileSync project. It is distributed under *
-// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
-// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
-// *****************************************************************************
-
-#ifndef SCOPE_GUARD_H_8971632487321434
-#define SCOPE_GUARD_H_8971632487321434
-
-#include <cassert>
-#include <exception>
-#include "type_tools.h"
-
-
-//std::uncaught_exceptions() currently unsupported on GCC and Clang => clean up ASAP
- static_assert(__GNUC__ < 6 || (__GNUC__ == 6 && (__GNUC_MINOR__ < 3 || (__GNUC_MINOR__ == 3 && __GNUC_PATCHLEVEL__ <= 1))), "check std::uncaught_exceptions support");
-
-namespace __cxxabiv1
-{
-struct __cxa_eh_globals;
-extern "C" __cxa_eh_globals* __cxa_get_globals() noexcept;
-}
-
-inline int getUncaughtExceptionCount()
-{
- return *(reinterpret_cast<unsigned int*>(static_cast<char*>(static_cast<void*>(__cxxabiv1::__cxa_get_globals())) + sizeof(void*)));
-}
-
-//best of Zen, Loki and C++17
-
-namespace zen
-{
-//Scope Guard
-/*
- auto guardAio = zen::makeGuard<ScopeGuardRunMode::ON_EXIT>([&] { ::CloseHandle(hDir); });
- ...
- guardAio.dismiss();
-
-Scope Exit:
- ZEN_ON_SCOPE_EXIT(::CloseHandle(hDir));
- ZEN_ON_SCOPE_FAIL(UndoPreviousWork());
- ZEN_ON_SCOPE_SUCCESS(NotifySuccess());
-*/
-
-enum class ScopeGuardRunMode
-{
- ON_EXIT,
- ON_SUCCESS,
- ON_FAIL
-};
-
-
-//partially specialize scope guard destructor code and get rid of those pesky MSVC "4127 conditional expression is constant"
-template <typename F> inline
-void runScopeGuardDestructor(F& fun, int /*exeptionCountOld*/, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_EXIT>)
-{
- try { fun(); }
- catch (...) { assert(false); } //consistency: don't expect exceptions for ON_EXIT even if "!failed"!
-}
-
-
-template <typename F> inline
-void runScopeGuardDestructor(F& fun, int exeptionCountOld, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_SUCCESS>)
-{
- const bool failed = getUncaughtExceptionCount() > exeptionCountOld;
- if (!failed)
- fun(); //throw X
-}
-
-
-template <typename F> inline
-void runScopeGuardDestructor(F& fun, int exeptionCountOld, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_FAIL>)
-{
- const bool failed = getUncaughtExceptionCount() > exeptionCountOld;
- if (failed)
- try { fun(); }
- catch (...) { assert(false); }
-}
-
-
-template <ScopeGuardRunMode runMode, typename F>
-class ScopeGuard
-{
-public:
- explicit ScopeGuard(const F& fun) : fun_(fun) {}
- explicit ScopeGuard( F&& fun) : fun_(std::move(fun)) {}
-
- ScopeGuard(ScopeGuard&& other) : fun_(std::move(other.fun_)),
- exeptionCount_(other.exeptionCount_),
- dismissed_(other.dismissed_) { other.dismissed_ = true; }
-
- ~ScopeGuard() noexcept(runMode != ScopeGuardRunMode::ON_SUCCESS)
- {
- if (!dismissed_)
- runScopeGuardDestructor(fun_, exeptionCount_, StaticEnum<ScopeGuardRunMode, runMode>());
- }
-
- void dismiss() { dismissed_ = true; }
-
-private:
- ScopeGuard (const ScopeGuard&) = delete;
- ScopeGuard& operator=(const ScopeGuard&) = delete;
-
- F fun_;
- const int exeptionCount_ = getUncaughtExceptionCount();
- bool dismissed_ = false;
-};
-
-
-template <ScopeGuardRunMode runMode, class F> inline
-auto makeGuard(F&& fun) { return ScopeGuard<runMode, std::decay_t<F>>(std::forward<F>(fun)); }
-}
-
-#define ZEN_CONCAT_SUB(X, Y) X ## Y
-#define ZEN_CONCAT(X, Y) ZEN_CONCAT_SUB(X, Y)
-
-#define ZEN_ON_SCOPE_EXIT(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_EXIT >([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
-#define ZEN_ON_SCOPE_FAIL(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_FAIL >([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
-#define ZEN_ON_SCOPE_SUCCESS(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_SUCCESS>([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
-
-#endif //SCOPE_GUARD_H_8971632487321434
+// *****************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 *
+// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
+// *****************************************************************************
+
+#ifndef SCOPE_GUARD_H_8971632487321434
+#define SCOPE_GUARD_H_8971632487321434
+
+#include <cassert>
+#include <exception>
+#include "type_tools.h"
+
+
+//std::uncaught_exceptions() currently unsupported on GCC and Clang => clean up ASAP
+ static_assert(__GNUC__ < 6 || (__GNUC__ == 6 && (__GNUC_MINOR__ < 3 || (__GNUC_MINOR__ == 3 && __GNUC_PATCHLEVEL__ <= 1))), "check std::uncaught_exceptions support");
+
+namespace __cxxabiv1
+{
+struct __cxa_eh_globals;
+extern "C" __cxa_eh_globals* __cxa_get_globals() noexcept;
+}
+
+inline int getUncaughtExceptionCount()
+{
+ return *(reinterpret_cast<unsigned int*>(static_cast<char*>(static_cast<void*>(__cxxabiv1::__cxa_get_globals())) + sizeof(void*)));
+}
+
+//best of Zen, Loki and C++17
+
+namespace zen
+{
+//Scope Guard
+/*
+ auto guardAio = zen::makeGuard<ScopeGuardRunMode::ON_EXIT>([&] { ::CloseHandle(hDir); });
+ ...
+ guardAio.dismiss();
+
+Scope Exit:
+ ZEN_ON_SCOPE_EXIT(::CloseHandle(hDir));
+ ZEN_ON_SCOPE_FAIL(UndoPreviousWork());
+ ZEN_ON_SCOPE_SUCCESS(NotifySuccess());
+*/
+
+enum class ScopeGuardRunMode
+{
+ ON_EXIT,
+ ON_SUCCESS,
+ ON_FAIL
+};
+
+
+//partially specialize scope guard destructor code and get rid of those pesky MSVC "4127 conditional expression is constant"
+template <typename F> inline
+void runScopeGuardDestructor(F& fun, int /*exeptionCountOld*/, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_EXIT>)
+{
+ try { fun(); }
+ catch (...) { assert(false); } //consistency: don't expect exceptions for ON_EXIT even if "!failed"!
+}
+
+
+template <typename F> inline
+void runScopeGuardDestructor(F& fun, int exeptionCountOld, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_SUCCESS>)
+{
+ const bool failed = getUncaughtExceptionCount() > exeptionCountOld;
+ if (!failed)
+ fun(); //throw X
+}
+
+
+template <typename F> inline
+void runScopeGuardDestructor(F& fun, int exeptionCountOld, StaticEnum<ScopeGuardRunMode, ScopeGuardRunMode::ON_FAIL>)
+{
+ const bool failed = getUncaughtExceptionCount() > exeptionCountOld;
+ if (failed)
+ try { fun(); }
+ catch (...) { assert(false); }
+}
+
+
+template <ScopeGuardRunMode runMode, typename F>
+class ScopeGuard
+{
+public:
+ explicit ScopeGuard(const F& fun) : fun_(fun) {}
+ explicit ScopeGuard( F&& fun) : fun_(std::move(fun)) {}
+
+ ScopeGuard(ScopeGuard&& other) : fun_(std::move(other.fun_)),
+ exeptionCount_(other.exeptionCount_),
+ dismissed_(other.dismissed_) { other.dismissed_ = true; }
+
+ ~ScopeGuard() noexcept(runMode != ScopeGuardRunMode::ON_SUCCESS)
+ {
+ if (!dismissed_)
+ runScopeGuardDestructor(fun_, exeptionCount_, StaticEnum<ScopeGuardRunMode, runMode>());
+ }
+
+ void dismiss() { dismissed_ = true; }
+
+private:
+ ScopeGuard (const ScopeGuard&) = delete;
+ ScopeGuard& operator=(const ScopeGuard&) = delete;
+
+ F fun_;
+ const int exeptionCount_ = getUncaughtExceptionCount();
+ bool dismissed_ = false;
+};
+
+
+template <ScopeGuardRunMode runMode, class F> inline
+auto makeGuard(F&& fun) { return ScopeGuard<runMode, std::decay_t<F>>(std::forward<F>(fun)); }
+}
+
+#define ZEN_CONCAT_SUB(X, Y) X ## Y
+#define ZEN_CONCAT(X, Y) ZEN_CONCAT_SUB(X, Y)
+
+#define ZEN_ON_SCOPE_EXIT(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_EXIT >([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
+#define ZEN_ON_SCOPE_FAIL(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_FAIL >([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
+#define ZEN_ON_SCOPE_SUCCESS(X) auto ZEN_CONCAT(dummy, __LINE__) = zen::makeGuard<zen::ScopeGuardRunMode::ON_SUCCESS>([&]{ X; }); (void)ZEN_CONCAT(dummy, __LINE__);
+
+#endif //SCOPE_GUARD_H_8971632487321434
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