增加清除空闲池功能

src/client/mod.rs

@@ -162,6 +162,12 @@ impl Client<(), Body> {
     pub fn builder() -> Builder {
         Builder::default()
     }
+
+    //add by [email protected], 2019-01-23
+    ///clear pool idles
+    pub fn clear_pool_idles(&self){
+        self.pool.clear_idles();
+    }
 }
 
 impl<C, B> Client<C, B>

src/client/pool.rs

@@ -171,6 +171,21 @@ impl<T: Poolable> Pool<T> {
         })
     }
 
+    //add by [email protected], 2019-01-23
+    pub(super) fn clear_idles(&self){
+        match self.inner.as_ref(){
+            Some(ref_inner) => {
+                match ref_inner.lock(){
+                    Ok(mut inner) => {
+                        inner.idle.clear();
+                    },
+                    _ => {}
+                }
+            },
+            None => {}
+        }
+    }
+
     #[cfg(test)]
     fn locked(&self) -> ::std::sync::MutexGuard<PoolInner<T>> {
         self