Merge pull request #1052 from debris/exchangedata

Add exchangedata for osx

Author: alexcrichton

src/unix/bsd/apple/b32.rs

@@ -58,3 +58,9 @@ pub const __PTHREAD_RWLOCKATTR_SIZE__: usize = 12;
 
 pub const TIOCTIMESTAMP: ::c_ulong = 0x40087459;
 pub const TIOCDCDTIMESTAMP: ::c_ulong = 0x40087458;
+
+extern {
+    pub fn exchangedata(path1: *const ::c_char,
+                        path2: *const ::c_char,
+                        options: ::c_ulong) -> ::c_int;
+}

src/unix/bsd/apple/b64.rs

@@ -63,3 +63,9 @@ pub const __PTHREAD_RWLOCKATTR_SIZE__: usize = 16;
 
 pub const TIOCTIMESTAMP: ::c_ulong = 0x40107459;
 pub const TIOCDCDTIMESTAMP: ::c_ulong = 0x40107458;
+
+extern {
+    pub fn exchangedata(path1: *const ::c_char,
+                        path2: *const ::c_char,
+                        options: ::c_uint) -> ::c_int;
+}