rust跨平台调用动态库

动态库在不同的操作系统，扩展名是不一样的，所以要做处理:

static LIB: Lazy<Mutex<Option<Library>>> = Lazy::new(|| Mutex::new(None));type CreateFunc = unsafe extern "C" fn(*const c_char, *const c_char) -> c_int;
type AddFunc =
unsafe extern "C" fn(*const c_char, *const c_char, *const c_char, *const c_char) -> c_int;type CreateFuncoracle = unsafe extern "C" fn(*const c_char, *const c_char) -> c_int;type AddFuncoracle =
unsafe extern "C" fn(*const c_char, *const c_char, *const c_char, *const c_char) -> c_int;
#[cfg(target_os = "windows")]
const LIB_NAME: &str = "test.dll";#[cfg(target_os = "macos")]
const LIB_NAME: &str = "./resources/test.dylib";#[cfg(target_os = "linux")]
const LIB_NAME: &str = "./resources/test.so";// 初始化全局变量
pub fn initialize_library() -> Result<(), ApiError> {let mut lib = LIB.lock().unwrap();*lib = Some(unsafe {Library::new(LIB_NAME).map_err(|e| {ApiError::InternalError(format!("无法加载库: {}", e))})?});Ok(())
}unsafe {let lib1 = LIB.lock().map_err(|e| { ApiError::InternalError(format!("无法加载库: {}", e)) })?;if let Some(ref lib) = *lib1 {// 获取 setdata_mssql_create 方法的符号let create: Symbol<CreateFunc> = lib.get(b"setdata_mssql_create").map_err(|e| { ApiError::InternalError(format!("无法加载函数: {}", e)) })?;//let connectionString = "Server=192.168.3.115;Database=testdb;User Id=sa;Password=****;TrustServerCertificate=True;";let c_stringconnectionString =CString::new(connectionString).map_err(|e| { ApiError::InternalError(format!("无法创建字符串: {}", e)) })?;let c_ptrconnectionString: *const c_char = c_stringconnectionString.as_ptr();let createString = sql.as_str();let c_stringcreateString =CString::new(createString).map_err(|e| { ApiError::InternalError(format!("无法创建字符串: {}", e)) })?;let c_ptrcreateString: *const c_char =c_stringcreateString.as_ptr();let result = create(c_ptrconnectionString,c_ptrcreateString,);if (result != 1) {warn!("表修改没有成功，详情请看日志文件，sql:{}",sql);return Err(ApiError::InternalError(format!("表修改没有成功，详情请看日志文件，sql:{}",sql)));}} else {println!("Library is not initialized");}}

部分代码摘自hpctb，实测方案可行。