Fix bug when new internal buffer not set as last on the pool

Author: Isty001

src/variable.c

@@ -92,6 +92,7 @@ MemPoolError pool_variable_alloc(VariableMemPool *pool, size_t size, void **ptr)
     if (!buffer_has_space(buff, pool->header_size + block_size)) {
         buff->next = buffer_new(pool->header_size + max(pool->buff_size, block_size));
         buff = buff->next;
+        pool->buff_last = buff;
     }
     *ptr = from_buffer(buff, pool->header_size, block_size);
     unlock(pool);

test/variable_test.c

@@ -185,13 +185,34 @@ MU_TEST(test_sizeof)
 
     mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_aligned_sizeof(pool, b, &size));
     mu_assert_int_eq(mem_align(12), size);
+
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_destroy(pool));
+}
+
+MU_TEST(test_multi_blocks)
+{
+    VariableMemPool *pool;
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_init(&pool, 1, 10));
+
+    void *a, *b, *c;
+
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_alloc(pool, 60, &a));
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_alloc(pool, 600, &c));
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_alloc(pool, 12, &b));
+
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_free(pool, a));
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_free(pool, b));
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_free(pool, c));
+
+    mu_assert_int_eq(MEM_POOL_ERR_OK, pool_variable_destroy(pool));
 }
 
 void run_variable_pool_test(void)
 {
     MU_RUN_TEST(test_alloc);
     MU_RUN_TEST(test_complex_defragmentation);
     MU_RUN_TEST(test_sizeof);
+    MU_RUN_TEST(test_multi_blocks);
 
     MU_REPORT();
 }