obs-StreamFX/source/nvidia/cuda/nvidia-cuda-context-stack.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2020 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "nvidia-cuda-context-stack.hpp"
#include <stdexcept>
nvidia::cuda::context_stack::context_stack(std::shared_ptr<::nvidia::cuda::cuda> cuda,
std::shared_ptr<::nvidia::cuda::context> context)
: _cuda(cuda), _ctx(context)
{
using namespace ::nvidia::cuda;
if (!cuda)
throw std::invalid_argument("cuda");
if (!context)
throw std::invalid_argument("context");
if (cu_result res = _cuda->cuCtxPushCurrent(_ctx->get()); res != cu_result::SUCCESS) {
throw std::runtime_error("Failed to push context.");
}
}
nvidia::cuda::context_stack::~context_stack()
{
using namespace ::nvidia::cuda;
cu_context_t ctx;
_cuda->cuCtxGetCurrent(&ctx);
if (ctx == _ctx->get()) {
_cuda->cuCtxPopCurrent(&ctx);
}
}