int main() {
    printf("=== Async I/O Tests ===\n");

    printf("Test 1: Async file write\n");
    int f = fopen("async_test.txt", "w");
    if (f == 0) {
        printf("ERROR: Could not open file\n");
        return 1;
    }
    int write_handle = async_fwrite(f, "Hello from async I/O!", 21);
    printf("Write started, handle: %d\n", write_handle);
    int result = async_wait(write_handle);
    printf("Write completed, bytes written: %d\n", result);
    fclose(f);
    printf("PASS: Async write works\n");

    printf("Test 2: Async file read\n");
    f = fopen("async_test.txt", "r");
    if (f == 0) {
        printf("ERROR: Could not open file\n");
        return 1;
    }
    int buffer[256];
    int read_handle = async_fread(f, &buffer, 256);
    printf("Read started, handle: %d\n", read_handle);

    printf("Polling for completion...\n");
    while (async_poll(read_handle) == 0) {
        printf(".");
    }
    printf("\nRead complete!\n");

    result = async_result(read_handle);
    printf("Bytes read: %d\n", result);
    fclose(f);
    printf("PASS: Async read works\n");

    printf("Test 3: Cleanup\n");
    fremove("async_test.txt");
    printf("PASS: File removed\n");

    printf("\n=== All Async I/O Tests Completed ===\n");
    return 0;
}