From ac415c00947248a80e8f0e2d9ff3d910af0e99d2 Mon Sep 17 00:00:00 2001
From: Qiao Longfei <qiaolongfei@baidu.com>
Date: Tue, 6 Nov 2018 11:14:34 +0800
Subject: [PATCH] change lock_guard to unique_lock

---
 paddle/fluid/framework/threadpool.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/paddle/fluid/framework/threadpool.cc b/paddle/fluid/framework/threadpool.cc
index a471c83115..21fab2cf5f 100644
--- a/paddle/fluid/framework/threadpool.cc
+++ b/paddle/fluid/framework/threadpool.cc
@@ -57,7 +57,7 @@ ThreadPool::ThreadPool(int num_threads) : running_(true) {
 ThreadPool::~ThreadPool() {
   {
     // notify all threads to stop running
-    std::lock_guard<std::mutex> l(mutex_);
+    std::unique_lock<std::mutex> l(mutex_);
     running_ = false;
   }
   scheduled_.notify_all();
-- 
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