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[libc++] Implement P0339R6 (polymorphic_allocator<> as a vocabulary t…
…ype) Reviewed By: ldionne, #libc Spies: LRFLEW, libcxx-commits, arichardson, krytarowski, jdoerfert Differential Revision: https://reviews.llvm.org/D137739
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19 changes: 19 additions & 0 deletions
19
...mem.poly.allocator.class/mem.poly.allocator.mem/allocate_vocabulary.attributes.verify.cpp
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,19 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
| // See https://llvm.org/LICENSE.txt for license information. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
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| // UNSUPPORTED: c++03, c++11, c++14, c++17 | ||
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| // check that clang warns on non-power-of-two alignment | ||
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| #include <memory_resource> | ||
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| void func() { | ||
| std::pmr::polymorphic_allocator<> allocator; | ||
| (void)allocator.allocate_bytes(0, 3); // expected-warning {{requested alignment is not a power of 2}} | ||
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| } |
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65 changes: 65 additions & 0 deletions
65
...em.res/mem.poly.allocator.class/mem.poly.allocator.mem/allocate_deallocate_bytes.pass.cpp
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,65 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
| // See https://llvm.org/LICENSE.txt for license information. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
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| // UNSUPPORTED: c++03, c++11, c++14, c++17 | ||
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}} | ||
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{11.0|12.0}} | ||
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| // test_memory_resource requires RTTI for dynamic_cast | ||
| // UNSUPPORTED: no-rtti | ||
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| // <memory_resource> | ||
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| // polymorphic_allocator::allocate_bytes() | ||
| // polymorphic_allocator::deallocate_bytes() | ||
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| #include <algorithm> | ||
| #include <cassert> | ||
| #include <concepts> | ||
| #include <memory_resource> | ||
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| #include "tracking_mem_res.h" | ||
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| template <class T> | ||
| void test() { | ||
| size_t last_size = 0; | ||
| size_t last_alignment = 0; | ||
| TrackingMemRes resource(&last_size, &last_alignment); | ||
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| std::pmr::polymorphic_allocator<T> allocator(&resource); | ||
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| { | ||
| std::same_as<void*> decltype(auto) allocation = allocator.allocate_bytes(13); | ||
| auto ptr = static_cast<char*>(allocation); | ||
| std::fill(ptr, ptr + 13, '0'); | ||
| assert(last_size == 13); | ||
| assert(last_alignment == alignof(max_align_t)); | ||
| allocator.deallocate_bytes(allocation, 13); | ||
| assert(last_size == 13); | ||
| assert(last_alignment == alignof(max_align_t)); | ||
| } | ||
| { | ||
| void* allocation = allocator.allocate_bytes(13, 64); | ||
| auto ptr = static_cast<char*>(allocation); | ||
| std::fill(ptr, ptr + 13, '0'); | ||
| assert(last_size == 13); | ||
| assert(last_alignment == 64); | ||
| allocator.deallocate_bytes(allocation, 13, 64); | ||
| assert(last_size == 13); | ||
| assert(last_alignment == 64); | ||
| } | ||
| } | ||
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| struct S {}; | ||
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| int main(int, char**) { | ||
| test<std::byte>(); | ||
| test<S>(); | ||
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| return 0; | ||
| } |
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