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46 lines
1.2 KiB
46 lines
1.2 KiB
6 years ago
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// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "paddle/fluid/platform/gpu_info.h"
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namespace paddle {
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namespace platform {
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class CUDADeviceGuard {
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public:
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explicit inline CUDADeviceGuard(int dev_id) {
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int prev_id = platform::GetCurrentDeviceId();
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if (prev_id != dev_id) {
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prev_id_ = prev_id;
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platform::SetDeviceId(dev_id);
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}
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}
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inline ~CUDADeviceGuard() {
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if (prev_id_ != -1) {
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platform::SetDeviceId(prev_id_);
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}
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}
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CUDADeviceGuard(const CUDADeviceGuard& o) = delete;
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CUDADeviceGuard& operator=(const CUDADeviceGuard& o) = delete;
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private:
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int prev_id_{-1};
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};
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} // namespace platform
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} // namespace paddle
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