| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // shared_ptr |
| |
| // Example move-only deleter |
| |
| #ifndef DELETER_H |
| #define DELETER_H |
| |
| #include <type_traits> |
| #include <cassert> |
| |
| struct test_deleter_base |
| { |
| static int count; |
| static int dealloc_count; |
| }; |
| |
| int test_deleter_base::count = 0; |
| int test_deleter_base::dealloc_count = 0; |
| |
| template <class T> |
| class test_deleter |
| : public test_deleter_base |
| { |
| int state_; |
| |
| public: |
| |
| test_deleter() : state_(0) {++count;} |
| explicit test_deleter(int s) : state_(s) {++count;} |
| test_deleter(const test_deleter& d) |
| : state_(d.state_) {++count;} |
| ~test_deleter() {assert(state_ >= 0); --count; state_ = -1;} |
| |
| int state() const {return state_;} |
| void set_state(int i) {state_ = i;} |
| |
| void operator()(T* p) {assert(state_ >= 0); ++dealloc_count; delete p;} |
| }; |
| |
| template <class T> |
| void |
| swap(test_deleter<T>& x, test_deleter<T>& y) |
| { |
| test_deleter<T> t(std::move(x)); |
| x = std::move(y); |
| y = std::move(t); |
| } |
| |
| #endif // DELETER_H |