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// 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 prelude::v1::*;
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);
}
}
}
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