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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: no-exceptions
// 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}}
// <memory_resource>
// class monotonic_buffer_resource
#include <memory_resource>
#include <cassert>
#include "count_new.h"
#include "test_macros.h"
struct repointable_resource : public std::pmr::memory_resource {
std::pmr::memory_resource* which;
explicit repointable_resource(std::pmr::memory_resource* res) : which(res) {}
private:
void* do_allocate(size_t size, size_t align) override { return which->allocate(size, align); }
void do_deallocate(void* p, size_t size, size_t align) override { return which->deallocate(p, size, align); }
bool do_is_equal(std::pmr::memory_resource const& rhs) const noexcept override { return which->is_equal(rhs); }
};
void test_exception_safety() {
globalMemCounter.reset();
auto upstream = repointable_resource(std::pmr::new_delete_resource());
alignas(16) char buffer[64];
auto mono1 = std::pmr::monotonic_buffer_resource(buffer, sizeof buffer, &upstream);
std::pmr::memory_resource& r1 = mono1;
void* res = r1.allocate(64, 16);
assert(res == buffer);
assert(globalMemCounter.checkNewCalledEq(0));
res = r1.allocate(64, 16);
assert(res != buffer);
assert(globalMemCounter.checkNewCalledEq(1));
assert(globalMemCounter.checkDeleteCalledEq(0));
const size_t last_new_size = globalMemCounter.last_new_size;
upstream.which = std::pmr::null_memory_resource();
try {
res = r1.allocate(last_new_size, 16);
assert(false);
} catch (const std::bad_alloc&) {
// we expect this
}
assert(globalMemCounter.checkNewCalledEq(1));
assert(globalMemCounter.checkDeleteCalledEq(0));
upstream.which = std::pmr::new_delete_resource();
res = r1.allocate(last_new_size, 16);
assert(res != buffer);
assert(globalMemCounter.checkNewCalledEq(2));
assert(globalMemCounter.checkDeleteCalledEq(0));
mono1.release();
assert(globalMemCounter.checkNewCalledEq(2));
assert(globalMemCounter.checkDeleteCalledEq(2));
}
int main(int, char**) {
#if TEST_SUPPORTS_LIBRARY_INTERNAL_ALLOCATIONS && !defined(DISABLE_NEW_COUNT)
test_exception_safety();
#endif
return 0;
}
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