allocators/tests/arena_allocator.c

#include "malunal/allocators/arena.h"
#include "malunal/microtest.h"

MICROTEST(arena_allocator, can_init_and_free) {
  error_t           result    = {};
  arena_allocator_t allocator = {};
  malunal_uint32_t  temporary = 0;

  result = arena_allocator_init(500, &allocator);
  MICROTEST_EXPECT_NULL(result.domain);

  result = arena_allocator_size(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, platform_page_size());

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 16);

  result = arena_allocator_free(&allocator);
  MICROTEST_EXPECT_NULL(result.domain);

  result = arena_allocator_size(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 0);

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 0);
}

MICROTEST(arena_allocator, can_acquire_and_dispose) {
  error_t           result    = {};
  arena_allocator_t allocator = {};
  malunal_mptr_t    address   = null;
  malunal_uint32_t  temporary = 0;

  arena_allocator_init(500, &allocator);
  result = arena_allocator_acquire(&allocator, 64, &address);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_ASSERT_NOT_NULL(address);

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 80);

  result = arena_allocator_dispose(&allocator, address, 64);
  MICROTEST_EXPECT_NULL(result.domain);

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 80);
  arena_allocator_free(&allocator);
}

MICROTEST(arena_allocator, can_reset_allocator) {
  error_t           result    = {};
  arena_allocator_t allocator = {};
  malunal_mptr_t    address   = null;
  malunal_uint32_t  temporary = 0;

  arena_allocator_init(500, &allocator);
  result = arena_allocator_acquire(&allocator, 64, &address);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_ASSERT_NOT_NULL(address);

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 80);

  result = arena_allocator_reset(&allocator);
  MICROTEST_EXPECT_NULL(result.domain);

  result = arena_allocator_used(&allocator, &temporary);
  MICROTEST_EXPECT_NULL(result.domain);
  MICROTEST_EXPECT_EQ(temporary, 16);
  arena_allocator_free(&allocator);
}