1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // REQUIRES: c++experimental 11 // UNSUPPORTED: c++98, c++03 12 13 // <experimental/memory_resource> 14 15 // memory_resource * new_delete_resource() 16 17 // The lifetime of the value returned by 'new_delete_resource()' should 18 // never end, even very late into program termination. This test constructs 19 // attempts to use 'new_delete_resource()' very late in program termination 20 // to detect lifetime issues. 21 22 #include <experimental/memory_resource> 23 #include <type_traits> 24 #include <cassert> 25 26 namespace ex = std::experimental::pmr; 27 28 struct POSType { 29 ex::memory_resource* res = nullptr; 30 void* ptr = nullptr; 31 int n = 0; 32 POSType() {res = ex::new_delete_resource(); ptr = res->allocate(42); n = 42; } 33 POSType(ex::memory_resource* r, void* p, int s) : res(r), ptr(p), n(s) {} 34 ~POSType() { if (ptr) res->deallocate(ptr, n); } 35 }; 36 37 void swap(POSType & L, POSType & R) { 38 std::swap(L.res, R.res); 39 std::swap(L.ptr, R.ptr); 40 std::swap(L.n, R.n); 41 } 42 43 POSType constructed_before_resources; 44 45 // Constructs resources 46 ex::memory_resource* resource = ex::new_delete_resource(); 47 48 POSType constructed_after_resources(resource, resource->allocate(1024), 1024); 49 50 int main() 51 { 52 swap(constructed_after_resources, constructed_before_resources); 53 } 54
