1 files changed, 54 insertions, 0 deletions
diff --git a/ctr-std/src/sys/windows/dynamic_lib.rs b/ctr-std/src/sys/windows/dynamic_lib.rs
new file mode 100644
index 0000000..5227280
--- /dev/null
+++ b/ctr-std/src/sys/windows/dynamic_lib.rs
@@ -0,0 +1,54 @@
+// 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);
+        }
+    }
+}