152 lines
4.3 KiB
C++
152 lines
4.3 KiB
C++
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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#if !defined(HAVE_CUDA)
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namespace cv { namespace gpu {
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class MultiGpuManager::Impl {};
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MultiGpuManager::MultiGpuManager() { throw_nogpu(); }
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MultiGpuManager::~MultiGpuManager() {}
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void MultiGpuManager::init() { throw_nogpu(); }
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void MultiGpuManager::gpuOn(int) { throw_nogpu(); }
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void MultiGpuManager::gpuOff() { throw_nogpu(); }
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}}
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#else
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#include <vector>
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#include <cuda.h>
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#define cuSafeCall(expr) safeCall(expr, #expr, __FILE__, __LINE__)
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using namespace std;
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namespace cv { namespace gpu {
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class MultiGpuManager::Impl
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{
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public:
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Impl();
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~Impl()
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{
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for (int i = 0; i < num_devices_; ++i)
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cuSafeCall(cuCtxDestroy(contexts_[i]));
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}
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void gpuOn(int gpu_id)
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{
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if (gpu_id < 0 || gpu_id >= num_devices_)
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CV_Error(CV_StsBadArg, "MultiGpuManager::gpuOn: GPU ID is out of range");
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cuSafeCall(cuCtxPushCurrent(contexts_[gpu_id]));
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}
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void gpuOff()
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{
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CUcontext prev_context;
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cuSafeCall(cuCtxPopCurrent(&prev_context));
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}
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private:
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void safeCall(CUresult code, const char* expr, const char* file, int line)
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{
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if (code != CUDA_SUCCESS)
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error(expr, file, line, "");
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}
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int num_devices_;
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vector<CUcontext> contexts_;
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};
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MultiGpuManager::Impl::Impl(): num_devices_(0)
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{
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num_devices_ = getCudaEnabledDeviceCount();
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contexts_.resize(num_devices_);
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cuSafeCall(cuInit(0));
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CUdevice device;
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CUcontext prev_context;
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for (int i = 0; i < num_devices_; ++i)
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{
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cuSafeCall(cuDeviceGet(&device, i));
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cuSafeCall(cuCtxCreate(&contexts_[i], 0, device));
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cuSafeCall(cuCtxPopCurrent(&prev_context));
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}
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}
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MultiGpuManager::MultiGpuManager() {}
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MultiGpuManager::~MultiGpuManager() {}
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void MultiGpuManager::init()
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{
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impl_ = Ptr<Impl>(new Impl());
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}
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void MultiGpuManager::gpuOn(int gpu_id)
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{
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if (impl_.empty())
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CV_Error(CV_StsNullPtr, "MultiGpuManager::gpuOn: must be initialized before any calls");
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impl_->gpuOn(gpu_id);
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}
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void MultiGpuManager::gpuOff()
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{
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if (impl_.empty())
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CV_Error(CV_StsNullPtr, "MultiGpuManager::gpuOff: must be initialized before any calls");
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impl_->gpuOff();
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}
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}}
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#endif
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