在纯C中实现RAII？

typedef struct {
    FILE *file;
} FileResource;

typedef void (*Destructor)(FileResource *resource);

void close_file(FileResource *resource) {
    if (resource->file != NULL) {
        fclose(resource->file);
        resource->file = NULL;
    }
}

FileResource open_file(const char *filename) {
    FileResource resource = {NULL};
    resource.file = fopen(filename, "r");
    return resource;
}

void release_file_resource(FileResource *resource, Destructor destructor) {
    if (destructor != NULL) {
        destructor(resource);
    }
}

FileResource file = open_file("example.txt");
// 使用文件
release_file_resource(&file, close_file);