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/*
* Copyright (c) 2006-2025, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-09-03 Rbb666 the first version for mempool utest
* 2025-11-30 westcity-YOLO Add standardized utest documentation block
*/
/**
* Test Case Name: Kernel Core MemPool Functional Test
*
* Test Objectives:
* - Validate static/dynamic memory pool functionality
* - Verify critical APIs: rt_mp_init, rt_mp_detach, rt_mp_alloc, rt_mp_free, rt_mp_create, rt_mp_delete
* - Test boundary conditions and stress scenarios
*
* Test Scenarios:
* - **Static Init**: Predefined block size/count; verify name/total/free counts
* - **Dynamic Create**: rt_mp_create; verify pool metadata
* - **Static Alloc/Free**: 3-block allocation; verify count changes
* - **Dynamic Alloc/Free**: Identical to static pool operations
* - **Exhaustion Test**: Full allocation → free=0 → next alloc=NULL
* - **Invalid Free**: NULL pointer free; no crash, count unchanged
* - **Stress Test**: 100x full alloc/free cycles; count restored each time
*
* Verification Metrics:
* - API returns: RT_EOK (success) / NULL (failure)
* - Block counts match expected values
* - Exhaustion: Allocation fails correctly
* - NULL free: Safe without crash
* - Stress: 0 errors/memory leaks
*
* Dependencies:
* - RT_USING_MEMPOOL must be enabled
* - RT_USING_UTEST framework must be enabled
*
* Expected Results:
* [ PASSED ] [ result ] testcase (core.mempool)
* - All 7 scenarios pass
* - 0 memory leaks
* - Stress test <10ms
* - Execute via: `utest_run core.mempool` in msh
*/
#include <rtthread.h>
#include <stdlib.h>
#include "utest.h"
#define MEMPOOL_BLOCK_SIZE 80
#define MEMPOOL_BLOCK_COUNT 32
#define MEMPOOL_SIZE (MEMPOOL_BLOCK_SIZE + sizeof(rt_uint8_t *)) * MEMPOOL_BLOCK_COUNT
static rt_uint8_t mempool_static[MEMPOOL_SIZE];
static struct rt_mempool mp_static;
static rt_mp_t mp_dynamic;
/* Static memory pool test */
static void test_mp_static_init(void)
{
rt_err_t err;
err = rt_mp_init(&mp_static, "mp_static", &mempool_static[0], sizeof(mempool_static), MEMPOOL_BLOCK_SIZE);
uassert_true(err == RT_EOK);
uassert_str_equal(mp_static.parent.name, "mp_static");
uassert_true(mp_static.block_total_count == MEMPOOL_BLOCK_COUNT);
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Dynamic memory pool test */
static void test_mp_dynamic_create(void)
{
mp_dynamic = rt_mp_create("mp_dynamic", MEMPOOL_BLOCK_COUNT, MEMPOOL_BLOCK_SIZE);
uassert_not_null(mp_dynamic);
uassert_str_equal(mp_dynamic->parent.name, "mp_dynamic");
uassert_true(mp_dynamic->block_total_count == MEMPOOL_BLOCK_COUNT);
uassert_true(mp_dynamic->block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Allocation and free test for static */
static void test_mp_static_alloc_free(void)
{
void *block1, *block2, *block3;
/* Allocate blocks */
block1 = rt_mp_alloc(&mp_static, 0);
uassert_not_null(block1);
block2 = rt_mp_alloc(&mp_static, 0);
uassert_not_null(block2);
block3 = rt_mp_alloc(&mp_static, 0);
uassert_not_null(block3);
/* Check free count */
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT - 3);
/* Free blocks */
rt_mp_free(block1);
rt_mp_free(block2);
rt_mp_free(block3);
/* Check free count */
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Allocation and free test for dynamic */
static void test_mp_dynamic_alloc_free(void)
{
void *block1, *block2, *block3;
/* Allocate blocks */
block1 = rt_mp_alloc(mp_dynamic, 0);
uassert_not_null(block1);
block2 = rt_mp_alloc(mp_dynamic, 0);
uassert_not_null(block2);
block3 = rt_mp_alloc(mp_dynamic, 0);
uassert_not_null(block3);
/* Check free count */
uassert_true(mp_dynamic->block_free_count == MEMPOOL_BLOCK_COUNT - 3);
/* Free blocks */
rt_mp_free(block1);
rt_mp_free(block2);
rt_mp_free(block3);
/* Check free count */
uassert_true(mp_dynamic->block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Boundary test: allocate all blocks and try to allocate more */
static void test_mp_boundary_alloc_exceed(void)
{
void *blocks[MEMPOOL_BLOCK_COUNT];
void *extra_block;
int i;
/* Allocate all blocks */
for (i = 0; i < MEMPOOL_BLOCK_COUNT; i++)
{
blocks[i] = rt_mp_alloc(&mp_static, 0);
uassert_not_null(blocks[i]);
}
/* Check free count */
uassert_true(mp_static.block_free_count == 0);
/* Try to allocate one more (should fail) */
extra_block = rt_mp_alloc(&mp_static, 0);
uassert_null(extra_block);
/* Free all blocks */
for (i = 0; i < MEMPOOL_BLOCK_COUNT; i++)
{
rt_mp_free(blocks[i]);
}
/* Check free count */
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Boundary test: free invalid block */
static void test_mp_boundary_free_invalid(void)
{
/* Test freeing NULL - should not crash and do nothing */
rt_mp_free(RT_NULL);
/* Check free count remains the same */
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT);
}
/* Stress test: allocate and free repeatedly */
static void test_mp_stress_alloc_free(void)
{
void *blocks[MEMPOOL_BLOCK_COUNT];
int i, j;
for (j = 0; j < 100; j++) /* Repeat 100 times */
{
/* Allocate all blocks */
for (i = 0; i < MEMPOOL_BLOCK_COUNT; i++)
{
blocks[i] = rt_mp_alloc(&mp_static, 0);
uassert_not_null(blocks[i]);
}
/* Check free count */
uassert_true(mp_static.block_free_count == 0);
/* Free all blocks */
for (i = 0; i < MEMPOOL_BLOCK_COUNT; i++)
{
rt_mp_free(blocks[i]);
}
/* Check free count */
uassert_true(mp_static.block_free_count == MEMPOOL_BLOCK_COUNT);
}
}
static rt_err_t utest_tc_init(void)
{
return RT_EOK;
}
static rt_err_t utest_tc_cleanup(void)
{
/* Detach static mempool */
rt_mp_detach(&mp_static);
/* Delete dynamic mempool */
if (mp_dynamic != RT_NULL)
{
rt_mp_delete(mp_dynamic);
}
return RT_EOK;
}
static void testcase(void)
{
UTEST_UNIT_RUN(test_mp_static_init);
UTEST_UNIT_RUN(test_mp_dynamic_create);
UTEST_UNIT_RUN(test_mp_static_alloc_free);
UTEST_UNIT_RUN(test_mp_dynamic_alloc_free);
UTEST_UNIT_RUN(test_mp_boundary_alloc_exceed);
UTEST_UNIT_RUN(test_mp_boundary_free_invalid);
UTEST_UNIT_RUN(test_mp_stress_alloc_free);
}
UTEST_TC_EXPORT(testcase, "core.mempool", utest_tc_init, utest_tc_cleanup, 10);
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