| // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use os::windows::prelude::*; |
| |
| use ffi::{CString, OsStr}; |
| use io; |
| use sys::c; |
| |
| pub struct DynamicLibrary { |
| handle: c::HMODULE, |
| } |
| |
| impl DynamicLibrary { |
| pub fn open(filename: &str) -> io::Result<DynamicLibrary> { |
| let filename = OsStr::new(filename) |
| .encode_wide() |
| .chain(Some(0)) |
| .collect::<Vec<_>>(); |
| let result = unsafe { |
| c::LoadLibraryW(filename.as_ptr()) |
| }; |
| if result.is_null() { |
| Err(io::Error::last_os_error()) |
| } else { |
| Ok(DynamicLibrary { handle: result }) |
| } |
| } |
| |
| pub fn symbol(&self, symbol: &str) -> io::Result<usize> { |
| let symbol = CString::new(symbol)?; |
| unsafe { |
| match c::GetProcAddress(self.handle, symbol.as_ptr()) as usize { |
| 0 => Err(io::Error::last_os_error()), |
| n => Ok(n), |
| } |
| } |
| } |
| } |
| |
| impl Drop for DynamicLibrary { |
| fn drop(&mut self) { |
| unsafe { |
| c::FreeLibrary(self.handle); |
| } |
| } |
| } |