arena allocators are fully implemented

2025-12-06 14:19:53 +01:00
parent b912759050
commit d6ad1c7602
5 changed files with 92 additions and 10 deletions
@@ -0,0 +1,79 @@
+#include <criterion/criterion.h>
+#include <criterion/internal/assert.h>
+#include "cig.h"
+
+Test(arena_allocator, test) {
+	with_borrow(backing) {
+		allocator_t arena = arena_allocator_create(backing, 4 * MB);
+		for ( size_t i = 0; i < 1000; i++ ) {
+			allocator_reset(arena);
+			allocator_alloc(arena, 4 * MB);
+		}
+
+		borrow_allocator_t *concrete = (borrow_allocator_t*)backing.this;
+		size_t n_allocations = 0;
+		for (linked_allocation_node_t *node = concrete->head; node != NULL; node = node->next) {
+			n_allocations++;
+		}
+		cr_assert_eq(n_allocations, 1);
+	}
+
+	with_borrow(backing) {
+		allocator_t arena = arena_allocator_create(backing, 0);
+		for ( size_t i = 0; i < 1000; i++ ) {
+			allocator_reset(arena);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+		}
+
+		borrow_allocator_t *concrete = (borrow_allocator_t*)backing.this;
+		size_t n_allocations = 0;
+		for (linked_allocation_node_t *node = concrete->head; node != NULL; node = node->next) {
+			n_allocations++;
+		}
+		cr_assert_eq(n_allocations, 1);
+	}
+
+	with_borrow(backing) {
+		allocator_t arena = arena_allocator_create(backing, 0);
+		for ( size_t i = 0; i < 1000; i++ ) {
+			allocator_reset(arena);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+			allocator_alloc(arena, 1 * MB);
+		}
+
+		borrow_allocator_t *concrete_borrow = (borrow_allocator_t*)backing.this;
+		arena_allocator_t *concrete_arena = (arena_allocator_t*)arena.this;
+		size_t n_allocations = 0;
+		for (linked_allocation_node_t *node = concrete_borrow->head; node != NULL; node = node->next) {
+			n_allocations++;
+		}
+		cr_assert_eq(n_allocations, 1);
+		cr_assert_eq(concrete_arena->capacity, 4 * MB);
+	}
+
+	with_borrow(backing) {
+		allocator_t arena = arena_allocator_create(backing, 0);
+		for ( size_t i = 0; i < 1000; i++ ) {
+			allocator_reset(arena);
+			allocator_alloc(arena, 1);
+			allocator_alloc(arena, 1);
+			allocator_alloc(arena, 1);
+			allocator_alloc(arena, 1);
+		}
+
+		borrow_allocator_t *concrete_borrow = (borrow_allocator_t*)backing.this;
+		arena_allocator_t *concrete_arena = (arena_allocator_t*)arena.this;
+		size_t n_allocations = 0;
+		for (linked_allocation_node_t *node = concrete_borrow->head; node != NULL; node = node->next) {
+			n_allocations++;
+		}
+		cr_assert_eq(n_allocations, 1);
+		const size_t expected_capacity = 4 * MAX_ALIGN;
+		cr_assert_eq(concrete_arena->capacity, expected_capacity);
+	}
+}