a90c6dd460
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// shared_ptr
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// Example move-only deleter
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#ifndef DELETER_H
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#define DELETER_H
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#include <type_traits>
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#include <cassert>
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#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
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#define DELETE_FUNCTION = delete
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#else
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#define DELETE_FUNCTION { assert(false); }
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#endif
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struct test_deleter_base
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{
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static int count;
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static int dealloc_count;
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};
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int test_deleter_base::count = 0;
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int test_deleter_base::dealloc_count = 0;
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template <class T>
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class test_deleter
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: public test_deleter_base
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{
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int state_;
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public:
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test_deleter() : state_(0) {++count;}
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explicit test_deleter(int s) : state_(s) {++count;}
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test_deleter(const test_deleter& d)
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: state_(d.state_) {++count;}
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~test_deleter() {assert(state_ >= 0); --count; state_ = -1;}
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int state() const {return state_;}
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void set_state(int i) {state_ = i;}
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void operator()(T* p) {assert(state_ >= 0); ++dealloc_count; delete p;}
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test_deleter* operator&() const DELETE_FUNCTION;
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};
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template <class T>
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void
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swap(test_deleter<T>& x, test_deleter<T>& y)
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{
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test_deleter<T> t(std::move(x));
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x = std::move(y);
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y = std::move(t);
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}
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#endif // DELETER_H
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