61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* ListAlloc.test.cpp
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*
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* author: Roland Conybeare, Aug 2025
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*/
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#include "xo/alloc/ListAlloc.hpp"
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#include <catch2/catch.hpp>
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namespace xo {
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using xo::gc::ListAlloc;
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namespace ut {
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TEST_CASE("ListAlloc", "[alloc][gc]")
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{
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/** teeny weeny allocator.
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* but underlying ArenaAlloc works in multiples of VM page size
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* (most likely 4k)
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**/
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up<ListAlloc> alloc = ListAlloc::make("test", 16, 32, false);
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REQUIRE(alloc->name() == "test");
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REQUIRE(alloc->size() == 16);
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REQUIRE(alloc->before_checkpoint() == 0);
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REQUIRE(alloc->after_checkpoint() == 0);
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/* will expand */
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std::byte * mem1 = alloc->alloc(20);
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REQUIRE(mem1);
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REQUIRE(alloc->size() == alloc->page_size());
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/* round up to multiple of 8 */
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REQUIRE(alloc->before_checkpoint() == 24);
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REQUIRE(alloc->after_checkpoint() == 0);
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alloc->checkpoint();
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std::byte * mem2 = alloc->alloc(30);
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REQUIRE(mem2);
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REQUIRE(alloc->size() == alloc->page_size());
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REQUIRE(alloc->before_checkpoint() == 24);
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/* round up to multiple of 8 */
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REQUIRE(alloc->after_checkpoint() == 32);
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std::byte * mem3 = alloc->alloc(40);
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REQUIRE(mem3);
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REQUIRE(alloc->size() == alloc->page_size());
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REQUIRE(alloc->before_checkpoint() == 24);
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/* already multiple of 8 */
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REQUIRE(alloc->after_checkpoint() == 32 + 40);
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REQUIRE(alloc->is_before_checkpoint(mem1) == true);
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REQUIRE(alloc->is_before_checkpoint(mem2) == false);
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REQUIRE(alloc->is_before_checkpoint(mem3) == false);
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}
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} /*namespace ut*/
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} /*namespace xo*/
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/* ListAlloc.test.cpp */
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