Add bindings for `CFDictionarySetValue()`.

core-foundation-sys/src/dictionary.rs

@@ -63,4 +63,7 @@ extern {
     pub fn CFDictionaryGetTypeID() -> CFTypeID;
     pub fn CFDictionaryGetValueIfPresent(theDict: CFDictionaryRef, key: *const c_void, value: *mut *const c_void)
                                          -> Boolean;
+    pub fn CFDictionarySetValue(theDict: CFDictionaryRef,
+                                key: *const c_void,
+                                value: *const c_void);
 }

core-foundation/src/dictionary.rs

@@ -96,4 +96,9 @@ impl CFDictionary {
         let value: CFTypeRef = mem::transmute(self.get(key));
         TCFType::wrap_under_get_rule(value)
     }
+
+    #[inline]
+    pub unsafe fn set_value(&self, key: *const c_void, value: *const c_void) {
+        CFDictionarySetValue(self.0, key, value)
+    }
 }