From b30bdde15a841b2918f7ef8125f1afd3672a322d Mon Sep 17 00:00:00 2001
From: tangwei12 <tangwei12@baidu.com>
Date: Mon, 6 Aug 2018 22:15:10 +0800
Subject: [PATCH] random optimize

---
 paddle/fluid/operators/sampling_id_op.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/paddle/fluid/operators/sampling_id_op.h b/paddle/fluid/operators/sampling_id_op.h
index 7ad25fa13ae..7f3ca8e761c 100644
--- a/paddle/fluid/operators/sampling_id_op.h
+++ b/paddle/fluid/operators/sampling_id_op.h
@@ -72,11 +72,11 @@ class SamplingIdKernel : public framework::OpKernel<T> {
     // Standard mersenne_twister_engine seeded with rd()
     std::mt19937 gen(rd());
     std::uniform_real_distribution<> dis(0, 1);
-    rnd = std::bind(dis, gen);
+    rnd = std::bind(dis, std::ref(gen));
   }
 
   static std::once_flag init_flag_;
-  static std::function<> rnd;
+  static std::function<double()> rnd;
 };
 }  // namespace operators
 }  // namespace paddle
-- 
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