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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkScopeExit_DEFINED
#define SkScopeExit_DEFINED
#include "SkTypes.h"
#include "SkMacros.h"
#include <functional>
/** SkScopeExit calls a std:::function<void()> in its destructor. */
class SkScopeExit {
public:
SkScopeExit(std::function<void()> f) : fFn(std::move(f)) {}
SkScopeExit(SkScopeExit&& that) : fFn(std::move(that.fFn)) {}
~SkScopeExit() {
if (fFn) {
fFn();
}
}
SkScopeExit& operator=(SkScopeExit&& that) {
fFn = std::move(that.fFn);
return *this;
}
private:
std::function<void()> fFn;
SkScopeExit( const SkScopeExit& ) = delete;
SkScopeExit& operator=(const SkScopeExit& ) = delete;
};
/**
* SK_AT_SCOPE_EXIT(stmt) evaluates stmt when the current scope ends.
*
* E.g.
* {
* int x = 5;
* {
* SK_AT_SCOPE_EXIT(x--);
* SkASSERT(x == 5);
* }
* SkASSERT(x == 4);
* }
*/
#define SK_AT_SCOPE_EXIT(stmt) \
SkScopeExit SK_MACRO_APPEND_LINE(at_scope_exit_)([&]() { stmt; })
#endif // SkScopeExit_DEFINED
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