refactor: improve code quality in aligned allocation

- Simplify wasm_runtime_aligned_alloc_internal control flow using guard clause
- Remove redundant wasm_runtime_init() calls in tests (wasm_runtime_full_init handles it)

No functional changes, improves code readability and follows existing patterns.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: lum1n0us

core/iwasm/common/wasm_memory.c

@@ -1038,14 +1038,14 @@ wasm_runtime_aligned_alloc_internal(unsigned int size, unsigned int alignment)
                   "initialized.\n");
         return NULL;
     }
-    else if (memory_mode == MEMORY_MODE_POOL) {
-        return mem_allocator_malloc_aligned(pool_allocator, size, alignment);
-    }
-    else {
+
+    if (memory_mode != MEMORY_MODE_POOL) {
         LOG_ERROR("wasm_runtime_aligned_alloc failed: only supported in POOL "
                   "memory mode.\n");
         return NULL;
     }
+
+    return mem_allocator_malloc_aligned(pool_allocator, size, alignment);
 }
 
 void *

tests/unit/mem-alloc/mem_alloc_test.c

@@ -378,7 +378,6 @@ test_wasm_runtime_aligned_alloc_valid(void **state)
     init_args.mem_alloc_option.pool.heap_buf = malloc(256 * 1024);
     init_args.mem_alloc_option.pool.heap_size = 256 * 1024;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     /* Test valid aligned allocation */
@@ -405,7 +404,6 @@ test_wasm_runtime_aligned_alloc_zero_size(void **state)
     init_args.mem_alloc_option.pool.heap_buf = malloc(256 * 1024);
     init_args.mem_alloc_option.pool.heap_size = 256 * 1024;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     /* Zero size should return NULL */
@@ -428,7 +426,6 @@ test_wasm_runtime_aligned_alloc_zero_alignment(void **state)
     init_args.mem_alloc_option.pool.heap_buf = malloc(256 * 1024);
     init_args.mem_alloc_option.pool.heap_size = 256 * 1024;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     /* Zero alignment should return NULL */
@@ -449,7 +446,6 @@ test_wasm_runtime_aligned_alloc_system_mode(void **state)
     memset(&init_args, 0, sizeof(RuntimeInitArgs));
     init_args.mem_alloc_type = Alloc_With_System_Allocator;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     /* Should return NULL in non-POOL mode */
@@ -471,7 +467,6 @@ test_wasm_runtime_realloc_rejects_aligned(void **state)
     init_args.mem_alloc_option.pool.heap_buf = malloc(256 * 1024);
     init_args.mem_alloc_option.pool.heap_size = 256 * 1024;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     /* Allocate with alignment */
@@ -502,7 +497,6 @@ test_wasm_runtime_aligned_alloc_multiple_alignments(void **state)
     init_args.mem_alloc_option.pool.heap_buf = malloc(512 * 1024);
     init_args.mem_alloc_option.pool.heap_size = 512 * 1024;
 
-    assert_true(wasm_runtime_init());
     assert_true(wasm_runtime_full_init(&init_args));
 
     for (int i = 0; i < num_alignments; i++) {